SIEMENS Year 3 Annual Energy Performance Report for Jackson County School District April 2010 May 2011

Transcription

1 SIEMENS Year 3 Annual Energy Performance Report for Jackson County School District April 2010 May 2011 Submitted by: Siemens Industry, Inc. Building Technologies Division 150 Teal St. Suite 100 St. Rose, LA May 31, 2011

2 Table of Contents 1.0 Executive Summary 1.1 Project Background 1.2 Summary of Predicted and Measured Energy and Cost Savings 2.0 Discussion of Installed ECRMs ECRM 1: Energy Management Control System ECRM 2: Lighting Systems Upgrade ECRM 3: Chiller Replacement/HVAC Improvements ECRM 4: Water Conservation ECRM 5: Vending Misers 3.0 Detailed Facility Improvement Measures 1.1 Vancleave Schools 1.2 St. Martin Schools 1.3 East Central Schools Appendix: Detailed Savings Calculation Worksheets

3 1.0 Executive Summary 1.1 Project Background Jackson County School District has partnered with Siemens Industry, Inc to perform an Energy Conservation project on its facilities. This report presents the energy cost savings resulting from projects installed by Siemens for the months of April 2010 through May The resulting savings are presented and compared to the contractual guaranteed savings by Siemens. The mechanical and control systems installed by Siemens are functioning properly and have resulted in savings to the Jackson County School District in the amount of $454,425 for this contract year. The Siemens annual guaranteed savings of $396,065 have been met and exceeded by $58,360. A summary of actual and proposed savings is presented on the following page for each Energy Cost Reduction Measure (ECRM) in tables 1a, 1b and 1c. Both the measured energy savings and the resulting cost savings are presented. Siemens will strive to maintain an excellent performance throughout the years ahead. We thank for their confidence in Siemens and look forward to another successful year of reducing operating costs and improving the environment in the district s school facilities. 2

4 1.2 Summary of Predicted and Measured Energy and Cost Savings Table 1a - Summary of Energy Cost Reduction Measures / Measured and Verified Savings for Year 3 ECRM No. ECRM Title Annual Savings Operational Electric Energy (kwh/yr) Demand (kw/yr) Natural Gas (ccf/yr) Water (kgal/yr) Cost ($/yr) Savings ($) (stipulated) Total Savings ($) 1 Lighting 1,757,674 5,264 $135,737 $22,728 $158,465 2 Water Conservation 4,119 3,627 $23,378 $3,183 $26,561 3 EMCS 874,656 5,379 $58,997 $2,652 $61,650 4 Vendmiser 117,788 $7,421 $0 $7,421 5 HVAC 82,671 $5,208 $79,568 $84,776 6 Mechanical TSP 1 $115,553 $115,553 TOTAL 2,832,788 5,264 9,498 3,627 $230,741 $223,684 $454,425 1 Savings based on cancellation of Mechanical TSP Table 1b - Predicted/Guaranteed Savings for Year 3 (From Siemens Contract) ECRM No. ECRM Title Annual Savings Electric Energy (kwh/yr) Demand (kw/yr) Natural Gas (ccf/yr) Water (kgal/yr) 1 Lighting 1,120,918 3,365 $85,598 $22,728 $108,325 2 Water Conservation 20,844 3,894 $20,363 $3,183 $23,545 3 EMCS 894,429 5,379 $54,351 $2,652 $57,004 4 Vendmiser 133,000 $6,718 $0 $6,718 5 HVAC 326,202 $20,119 $79,568 $99,687 6 Mechanical TSP $0 $100,786 $100,786 TOTAL 2,495,393 3,365 9,273 0 $187,149 $208,916 $396,065 Cost ($/yr) Operational Savings ($) Total Savings ($) Table 1c - Annual Contract Reconciliation Actual Measured Savings $454,425 Guaranteed Savings for Current Year $396,065 Excess Savings / (Shortfall) $58,360 3

5 2.0 Discussion of Installed ECRMs The following Energy Cost Reduction Measures (ECRMs) were implemented by Siemens: ECRM 1: Energy Management and Control Systems (EMCS) Upgrade ECRM 2: Lighting Systems Upgrade ECRM 3: Heating, Ventilation & Air Conditioning (HVAC) Upgrade ECRM 4: Water Conservation Upgrade ECRM 5: Vending Miser Installation ECRM 1: Energy Management and Control Systems Upgrade This measure involved the expansion of the existing Siemens Apogee Energy Management and Control System to control the time of day scheduling function and monitoring of the HVAC equipment. The following facilities were included: Vancleave Attendance Center St. Martin Attendance Center East Central Attendance Center ECRM 2: Lighting Systems Upgrade The lighting retrofit, consisted of a complete district wide interior energy efficiency lighting retrofit and or replacement of fixtures in all spaces including ofiices, classrooms, auditoriums, gyms and corridors. The following facilities were included: Vancleve Schools St. Martin Schools East Central Schools ECRM 3: Heating, Ventilation & Air Conditioning (HVAC) Upgrade This project consisted of replacing 123 Water Source Heat Pumps and repairing the piping loops for the WSHP systems at the three high schools. Also, preventive and corrective maintenance labor services at all school sites were performed. Those facilities included: Vancleave High School St. Martin High School East Central High School 4

6 ECRM 4: Water Conservation Upgrade This project consisted of retrofitting and replacing many toilets, restroom faucets, urinal flush valves and pedal valves on sinks as well as the installation of various water-conserving devices of specific equipment. The following facilities were included in the water scope project: St. Martin High School St. Martin North Elementary St. Martin East Elementary ECRM 5: Vending Miser Installation This measure involved the installation of 43 VendingMiser devices on soft drink machines located at various schools located throughout the school district. The devices reduce energy consumption on the soft drink vending machines during times of inactivity. 5

7 3.0 Detailed Facility Improvement Measures The following detailed FIMS were implemented by Siemens: JACKSON COUNTY SCHOOL DISTRICT VANCLEVE SCHOOLS Vancleve High School (approx. 91,000 sqft.) Lighting (approx. 839 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. In the newer areas of the building that currently utilize T-8 technologies relamp with lower wattage lamps. Building HVAC The buildings heating and cooling requirements are provided by a water source heat pump system including heat pumps, plate & frame heat exchanger, cooling tower, boiler, pumps, and associated piping. Most of the original water source heat pumps are still functioning, a new cooling tower has been installed and some of the PVC distribution piping has been replaced. 13 split D/X Heat Pump units serve the classrooms in the newer areas of the building. Four 20-ton rooftop package D/X cooling units with gas heat serve the Gym. 6

8 One new 20-ton package rooftop D/X cooling unit has been installed to serve the cafeteria. Approximately 11 split systems serve outer buildings including field houses. Replace the original water source heat pumps with high efficiency heat pumps since they are at the end of their expected useful life. This can be done now or in the next few years, but for efficiency and economy purposes, the energy and maintenance savings will justify replacing them sooner rather than later. The piping for the water-source heat pump systems was installed using PVC. High temperature water has been run through these pipes due to inoperative safety controls resulting in the failure of the piping in some instances causing flooding in the schools. Many lengths of the existing PVC piping are deformed from overheated water flowing through it and are subject to additional failures at any time. Replace the original PVC piping with a combination of steel and copper piping. This cost cannot be supported through energy or operational savings in this project, but it is recommended that the district consider budgeting for this in the near future to avoid failures of these piping systems. Currently the heat loop system is designed as a constant flow system. Water flows through each heat pump regardless of weather the individual units are in the heating mode, cooling mode or off. Installing a variable frequency drive, in conjunction with isolation valves on each heat pump, will allow the system to optimize water flow as building heating and cooling requirements change. This reduction in pump speed has a cubic relation with the energy required to operate the pump. Siemens will remove and replace the original loop pump and motor (40 HP) and install a VFD with associated monitoring devices. In addition Siemens will install isolation valves at each water source heat pump. Building Automation The existing building automation system (Singer) is no longer functional. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will replace the existing building automation system and non-programmable thermostats with a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. 7

9 Vending Machines (approx. 5 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 5 vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating the vending machines are reduced and product integrity is maintained Vancleve Middle School (6 buildings, approx 60,000) Lighting (approx. 531 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. In the newer areas of the campus, like Tech Prep, that currently utilizes T-8 technologies relamp with lower wattage lamps. Building HVAC 46 split D/X cooling units serve the cooling needs of the campus. Heating is provided largely by gas furnaces with the exception of the cafeteria which uses a hydronic heating loop 8

10 Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Vending Machines (approx. 5 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 5 vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating the vending machines are reduced and product integrity is maintained VANCLEVE UPPER ELEMENTARY SCHOOL (6 BUILDINGS, APPROX 78,000 SQFT) Lighting (approx. 837 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. 9

11 Building HVAC 42 window units, 7 split D/X cooling units, and 6 Package rooftop units serve the cooling needs of the campus. Heating is provided primarily gas unit heaters and furnaces as well as electric heat strips in a few areas. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Vending Machines (1 machine) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install a Vendmiser control on the vending machine that allows the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. Vancleve Lower Elementary (approx. 63,000 sqft.) 10

12 Lighting (approx. 760 fixtures) The school has new efficient lighting technologies including T-8 s and Compact Fluorescents. There are approximately 6 fixtures to retrofit at this school. Building HVAC 43 split D/X heat pump units provide the buildings heating and cooling requirements. The school is new and the equipment appears to be well maintained. Building Automation There is currently a Johnson Control building automation system installed at the school. However the seven system zones were in bypass, which prevents the system from performing its intended function. Recommission, if possible, or replace the existing automation system. Vending Machines (1 machine) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install a Vendmiser control on the vending machine that allows the product temperature to rise, within an expectable 11

13 range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. TECHNOLOGY CENTER Lighting (approx. 558 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the facility. Building HVAC 8 Package rooftop units and one split D/X system serve the cooling needs of the campus. The package roof top units and gas unit heaters provide heating. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. 12

14 Vending Machines (2 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install a Vendmiser control on the two vending machines that allows the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. ALTERNATIVE EDUCATION Lighting (approx. 60 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the building. 13

15 Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Jackson County School District Saint Martin Schools Saint Martin High School (grades 9-12) (approx 95,500 sqft) Lighting (approx fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. 14

16 Building HVAC The buildings heating and cooling requirements are provided by a water source heat pump system including heat pumps, plate & frame heat exchanger, cooling tower, boiler, pumps, and associated piping. Approximately 12 of the original heat pumps have been replaced, a new cooling tower has been installed and some of the PVC distribution piping has been replaced. 6 split D/X units with gas heat serve the newer area of the school. Replace the remaining water source heat pumps with high efficiency heat pumps since they are at the end of their expected useful life. This can be done now or in the next few years, but for efficiency and economy purposes, the energy and maintenance savings will justify replacing them sooner rather than later. The piping for the water-source heat pump systems was installed using PVC. High temperature water has been run through these pipes due to inoperative safety controls resulting in the failure of the piping in some instances causing flooding in the schools. Many lengths of the existing PVC piping are deformed from overheated water flowing through it and are subject to additional failures at any time. Replace the original PVC piping with a combination of steel and copper piping. This cost cannot be supported through energy or operational savings in this project, but it is recommended that the district consider budgeting for this in the near future to avoid failures of these piping systems. 15

17 Currently the heat loop system is designed as a constant flow system. Water flows through each heat pump regardless of weather the individual units are in the heating mode, cooling mode or off. Installing a variable frequency drive, in conjunction with isolation valves on each heat pump, will allow the system to optimize water flow as building heating and cooling requirements change. This reduction in pump speed has a cubic relation with the energy required to operate the pump. Siemens will remove and replace the original loop pump and motor (40 HP) and install a VFD with associated monitoring devices. In addition Siemens will install isolation valves at each water source heat pump. Replace the 6 split D/X cooling units with high efficiency units Building Automation The existing building automation system (Singer) is no longer functional. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will replace the existing building automation system and non-programmable thermostats with a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. 16

18 Water Conservation (approx. 163 fixtures effected between both buildings) Currently the schools located in the Saint Martin district utilize well water and are scheduled to place these schools on city water. Siemens proposes to install water conserving plumbing fixtures (water closets, urinals, sinks, dishwasher) or in some cases retrofit the existing fixtures to minimize water consumption, where appropriate, throughout the high school. These retrofits will reduce future costs associated with water and sewer charges as well as the energy required to heat water where applicable. Vending Machines (approx. 9 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install nine Vendmiser controls on the vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. Saint Martin High School (grades 8-9) (approx. 75,000 sqft) 17

19 Lighting (approx. 804 fixtures) The school has new efficient lighting technologies including T-8 s and Compact Fluorescents. Retrofit or replace approximately 19 fixtures. Building HVAC 50 split D/X cooling units with hot water coils and a hydronic heating system provide the buildings heating and cooling requirements. The system is approx 5 years old and is in good condition. Building Automation The existing CSI automation system has thirteen zones of which two zones were in override. Recommission or replace the existing automation system. Add hot water reset control to the hydronicheating loop. Water Conservation Siemens proposes to install water conserving plumbing fixtures (water closets, urinals, sinks, dishwasher) or in some cases retrofit the existing fixtures to minimize water consumption, where appropriate, throughout the high school. These retrofits will reduce future costs associated with water and sewer charges as well as the energy required to heat water where applicable. Vending Machines (approx. 11 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 11 vending machines that allow the product temperature to rise, within an 18

20 expectable range, during non-school hours. Energy costs associated with operating the vending machines are reduced and product integrity is maintained. Saint Martin Middle School (approx 77,000 sqft, 8 buildings) Lighting (approx. 857 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. Building HVAC 28 split D/X cooling units, 27 window units serve the cooling needs of the campus. Heating is provided by a combination of gas unit heaters and gas furnaces. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a 19

21 new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Water Conservation (approx. 96 fixtures effected) Siemens proposes to install water conserving plumbing fixtures (water closets, urinals, sinks, dishwasher) or in some cases retrofit the existing fixtures to minimize water consumption, where appropriate, throughout the high school. These retrofits will reduce future costs associated with water and sewer charges as well as the energy required to heat water where applicable. Vending Machines (approx. 8 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 8 vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. SAINT MARTIN UPPER ELEMENTARY SCHOOL (APPROX 45,000 SQFT) Lighting (approx. 482 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. 20

22 Building HVAC 17 split D/X cooling units, 29 window units and one roof top package unit serves the cooling needs of the campus. Heating is provided by a combination of gas unit heaters and gas furnaces. Replace the older cooling and heating systems with higher efficiency units. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Water Conservation (approx. 89 fixtures effected) Siemens proposes to install water conserving plumbing fixtures (water closets, urinals, sinks, dishwasher) or in some cases retrofit the existing fixtures to minimize water consumption, where appropriate, throughout the high school. These retrofits will reduce future costs associated with water and sewer charges as well as the energy required to heat water where applicable. Vending Machines (approx. 5 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 5 vending machines that allow the product temperature to rise, within an 21

23 expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. Saint Martin East Elementary School (approx 46,000 sqft) Lighting (approx. 627 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. Building HVAC 7 split D/X cooling units, 45 window units, and r package unit serves the cooling needs of the campus. Heating is provided by a combination of gas unit heaters and gas furnaces. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Water Conservation (approx. 80 fixtures effected) Siemens proposes to install water conserving plumbing fixtures (water closets, urinals, sinks, dishwasher) or in some cases retrofit the existing fixtures to minimize water consumption, where appropriate, throughout the high school. These retrofits will reduce future costs associated with water and sewer charges as well as the energy required to heat water where applicable. 22

24 Vending Machines (approx. 2 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 2 vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. Saint Martin North Elementary School ( approx 48,000 sqft) Lighting (approx. 615 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. 23

25 Building HVAC Six split D/X cooling units (3 with multiple evaporators) and 30 window units serve the cooling needs of the campus. Heating is provided by a combination of gas unit heaters and gas furnaces. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Water Conservation (approx. 96 fixtures effected) Siemens proposes to install water conserving plumbing fixtures (water closets, urinals, sinks, dishwasher) or in some cases retrofit the existing fixtures to minimize water consumption, where appropriate, throughout the high school. These retrofits will reduce future costs associated with water and sewer charges as well as the energy required to heat water where applicable. Vending Machines (approx. 3 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 2 vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. 24

26 Jackson County School District East Central Schools East Central High School (approx 110,000 sqft) Lighting (approx fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. Building HVAC The buildings primary heating and cooling requirements are provided by a water source heat pump system including heat pumps, plate & frame heat exchanger, cooling tower, boiler, pumps, and associated piping. Approximately 12 of the original heat pumps have been replaced with split D/X cooling only units. A new Evapco cooling tower has been installed. Twenty-one split D/X heat pump units serve the classrooms in the newer areas of the building. Four 20-ton rooftop package D/X cooling units with gas heat serve the Gym. Approximately 6 split systems and 8 window units provide cooling to areas such as field houses and press boxes. Replace the remaining water source heat pumps with high efficiency heat pumps since they are at the end of their expected useful life. This can be done now or in the next few years, but for efficiency and economy purposes, the energy and maintenance savings will justify replacing them sooner rather than later. The piping for the water-source heat pump systems was installed using PVC. High temperature water has been run through these pipes due to inoperative safety controls resulting in the failure of the piping in some instances causing flooding in the schools. Many lengths of the existing PVC piping are deformed from overheated water flowing through it and are subject to additional failures at any time. Replace the original PVC piping with a combination of steel and copper piping. This cost cannot be 25

27 supported through energy or operational savings in this project, but it is recommended that the district consider budgeting for this in the near future to avoid failures of these piping systems. Currently the heat loop system is designed as a constant flow system. Water flows through each heat pump regardless of weather the individual units are in the heating mode, cooling mode or off. Installing a variable frequency drive, in conjunction with isolation valves on each heat pump, will allow the system to optimize water flow as building heating and cooling requirements change. This reduction in pump speed has a cubic relation with the energy required to operate the pump. Building Automation The existing building automation system (Singer) is no longer functional. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will replace the existing building automation system and non-programmable thermostats with a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Vending Machines (approx. 4 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install Vendmiser controls on the 4 vending machines that allow the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating the vending machines are reduced and product integrity is maintained 26

28 East Central Middle School (10 buildings, approx. 87,000 sqft) Lighting (approx. 762 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. Building HVAC 39 window units and 25 split D/X cooling units serve the cooling needs of the campus. Primarily gas unit heaters and furnaces provide heating with the exception of D/X heat pumps and electric heat strips that are utilized in some areas. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. 27

29 Vending Machines (approx. 1 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install a Vendmiser control on the vending machine that allows the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. Kitchen Hood. Kitchen hood systems, that do not include a designated make up air (MUA) system, are notorious for not only wasting energy but also creating an uncomfortable work environment for employees. When there is no designated MUA system conditioned air form the kitchen and surrounding spaces (typically the cafeteria) is exhausted out of the building via the kitchen hood. Siemens proposes to replace the existing kitchen hood with an integrated MUA system. Costs associated with conditioning the kitchen and cafeteria will be reduced. EAST CENTRAL UPPER ELEMENTARY SCHOOL (9 BUILDINGS, APPROX. 52,000 SQFT) Lighting (approx. 547 fixtures) Retrofit or upgrade existing lighting fixtures to new technologies to both reduce energy and maintenance costs as well improve lighting levels throughout the campus. 28

30 Building HVAC 38 window units, 12 split D/X cooling units, and 6 Package rooftop units serve the cooling needs of the campus. Primarily gas unit heaters and furnaces provide heating. Building Automation Currently there is no building automation system in this school. Room thermostats control space temperatures, however, monitoring or controlling building conditions during unoccupied periods is not currently possible. This is causing the HVAC equipment to run unnecessarily and the costs, including maintenance and utilities, associated with operating this equipment to be excessive. Siemens will install a new BAS system that will monitor space temperatures and provide start/stop, setback, and scheduling functions for associated HVAC equipment. Vending Machines (1 machine) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install a Vendmiser control on the vending machine that allows the product temperature to rise, within an expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. 29

31 EAST CENTRAL LOWER ELEMENTARY (APPROX. 61,000 SQFT) Lighting (approx. 782 fixtures) The school has new efficient lighting technologies including T-8 s and Compact Fluorescents. There are approximately 40 fixtures to be retrofitted or replaced. Building HVAC 41 split D/X heat pump units provide the buildings heating and cooling requirements. The school is new and the equipment appears to be well maintained. Building Automation There is currently a CSI building automation system installed at the school. However the system was in bypass, which prevents the system from performing its intended function. According to school personal this system has not been functional since it s installation. Recommission, if possible, or replace the existing automation system. Vending Machines (approx. 2 machines) Vending machines are designed to maintain a constant product temperature regardless of the building occupancy schedule. There is a cost associated with maintaining this temperature. Siemens will install a Vendmiser control on the two vending machines that allows the product temperature to rise, within an 30

32 expectable range, during non-school hours. Energy costs associated with operating this vending machine is reduced and product integrity is maintained. APPENDIX A Detailed Savings Calculation Worksheets 31

33 , Year 3 Annual Savings Report Jackson County, Mississippi Table 1a - Summary of Energy Cost Reduction Measures / Measured and Verified Savings for Year 3 ECRM No. ECRM Title Annual Savings Operational Electric Energy (kwh/yr) Demand (kw/yr) Natural Gas (ccf/yr) Water (kgal/yr) Cost ($/yr) Savings ($) (stipulated) Total Savings ($) 1 Lighting 1,757,674 5,264 $135,737 $22,728 $158,465 2 Water Conservation 4,119 3,627 $23,378 $3,183 $26,561 3 EMCS 874,656 5,379 $58,997 $2,652 $61,650 4 Vendmiser 117,788 $7,421 $0 $7,421 5 HVAC 82,671 $5,208 $79,568 $84,776 6 Mechanical TSP 1 $115,553 $115,553 TOTAL 2,832,788 5,264 9,498 3,627 $230,741 $223,684 $454,425 1 Savings based on cancellation of Mechanical TSP Table 1b - Predicted/Guaranteed Savings for Year 3 (From Siemens Contract) ECRM No. ECRM Title Annual Savings Electric Energy (kwh/yr) Demand (kw/yr) Natural Gas (ccf/yr) Water (kgal/yr) Cost ($/yr) Operational Savings ($) Total Savings ($) 1 Lighting 1,120,918 3,365 $85,598 $22,728 $108,325 2 Water Conservation 20,844 3,894 $20,363 $3,183 $23,545 3 EMCS 894,429 5,379 $54,351 $2,652 $57,004 4 Vendmiser 133,000 $6,718 $0 $6,718 5 HVAC 326,202 $20,119 $79,568 $99,687 6 Mechanical TSP $0 $100,786 $100,786 TOTAL 2,495,393 3,365 9,273 0 $187,149 $208,916 $396,065 Table 1c - Annual Contract Reconciliation Actual Measured Savings $454,425 Guaranteed Savings for Current Year $396,065 Excess Savings / (Shortfall) $58,360 Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 1 Submitted May 31, 2011

34 , Year 3 Annual Savings Report Jackson County, Mississippi Table 2 - Total Project Savings Summary Year Measured Savings Guaranteed Savings Excess Savings / (Shortfall) Total Accumulated Project Measured Savings Total Accumulated Project Guaranteed Savings Total Accumulated Project Excess Savings / (Shortfall) Construction Period $0 $0 $0 $0 $0 $0 1 $441,584 $376,805 $64,779 $441,584 $376,805 $64,779 2 $447,910 $386,310 $61,600 $889,494 $763,115 $126,379 3 $454,425 $396,065 $58,360 $1,343,919 $1,159,180 $184, Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 2 Submitted May 31, 2011

35 , Year 3 Annual Savings Report Jackson County, Mississippi Table 3 - Base Year Energy Consumption Data (January December 2004) Electrical Natural Gas Month Consumption (kwh) Demand Demand Total Cost ($) Consumption Cost ($) Metered Charged (ccf) (kw) (kw) Propane Total Consumption Cost ($) Total Cost ($) (gals) January 585,904 2,996 2,996 $53,563 10,048 $10,068 8,900 $10,184 $73,815 February 664,648 3,104 3,104 $57,950 9,424 $8,932 6,056 $6,420 $73,302 March 654,145 2,901 2,901 $56,192 7,779 $7,255 5,240 $5,607 $69,054 April 663,849 2,828 2,828 $51,815 4,533 $3,972 $55,787 May 678,858 2,941 2,941 $53,018 3,219 $3,074 5,800 $6,274 $62,366 June 778,146 2,644 2,644 $57,256 1,436 $1,321 $58,577 July 814,762 2,469 2,469 $58,267 1,315 $1,243 $59,510 August 994,253 3,394 3,394 $94,320 3,075 $2,842 6,863 $7,412 $104,574 Setember 1,184,065 3,958 3,958 $90,045 3,547 $3,266 $93,311 October 1,001,951 3,680 3,680 $77,926 4,445 $4,133 3,400 $3,672 $85,731 November 903,246 3,472 3,472 $70,914 4,338 $4,441 1,919 $2,072 $77,427 December 662,436 3,177 3,177 $55,492 10,776 $11,071 2,490 $2,689 $69,252 Total 9,586,263 37,564 37,564 $ 776,758 63,935 $ 61,618 40,668 $ 44,330 $882,706 (1) Billing history month is based on utility statement date, not billing period. Company Name: Company Rate Schedule: Electricity Singing River GS Natual Gas/Propane Water /Sewer Centerpoint Energy W. Jackson County Utililty Dist. Commercial Commercial Blossman & Niel Commercial Table 4 - Baseline Year Average Utility Rates (Used to calculate dollar savings) Electric ($/kwh) Electric ($/kw) Water ($/kgal) Sewer ($/kgal) $ $4.75 $ $ Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 3 Submitted May 31, 2011

36 , Year 3 Annual Savings Report Jackson County, Mississippi Table 5 - Siemens Guaranteed Savings (from Exhibit C of Contract) Year Energy/Utility Savings Operational Savings Total Savings Year 1 $179,882 $196,923 $376,805 Year 2 $183,480 $202,831 $386,310 Year 3 $187,149 $208,916 $396,065 Year 4 $190,892 $215,183 $406,075 Year 5 $194,710 $221,639 $416,349 Year 6 $198,604 $228,288 $426,892 Year 7 $202,576 $235,136 $437,713 Year 8 $206,628 $242,190 $448,818 Year 9 $210,760 $249,456 $460,217 Year 10 $214,976 $256,940 $471,915 Year 11 $219,275 $264,648 $483,923 Year 12 $223,661 $272,587 $496,248 Year 13 $228,134 $280,765 $508,899 Year 14 $232,697 $289,188 $521,885 Year 15 $237,350 $297,864 $535,214 Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 4 Submitted May 31, 2011

37 , Year 3 Annual Savings Report Jackson County, Mississippi Weather Conditions Weather data for the Jackson County area is from the National Weather Service, PQL Airport. The outdoor air temperature is used to calculate Pre-Retrofit consumption for the buildings receiving retrofits. A summary of collected temperature data is listed below. Month Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Jan-11 Feb-11 Mar-11 Degree Days (65F) Heating Degree Days (65F) Avg Temperature (F) Avg Daily Max Temp (F) Avg Daily Min Temp (F) Maximum Temperature (F) Minimum Temperature (F) Average Daily Temperatures (F) Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 5 Submitted May 31, 2011

38 , Year 3 Annual Savings Report Jackson County, Mississippi SOUTHERN ENERGY TECHNOLOGIES, INC. Lighting Systems Analysis Report Jackson County School District Lighting Upgrade Ver 1.4 Existing Lighting System Proposed Lighting System Annual Savings Existing Fixture Qty AOH Watts kw kwh/yr Watts kw kwh/yr kwh/yr kwhac kwh/ac ECM Qty AOH kwhac TotalkWh kw TotalkWh 2X4 2 LAMP T12 1, , , , , , ,140 TROFFER , , ,134 2LX 2X4 2 LAMP T , , , , , ,862 1,167 6,029 TROFFER , ,653 1,117 5,770 2LX 2X4 2 LAMP T , , , ,592 4,577 36, ,912 7,418 38,330 TROFFER , ,592 7,102 36,694 2LX 2X4 2 LAMP WRAP , , , , ,331 2LX , ,232 2X4 3 LAMP T , , , ,076 2,464 6, ,304 1,272 6,576 TROFFER , ,076 1,218 6,294 2LX 2X4 4 LAMP T LOUVERED LX 2X4 4 LAMP T , , , ,506 15, , ,400 20, ,884 TROFFER , ,224 2,454 12,678 2HSS 4LX , ,546 15,251 78,797 4SX , ,736 3,297 17,033 2X4 4 LAMP T , , , ,096 15, , ,300 19,264 99,564 TROFFER , ,454 2,509 12,963 2HSS 4LX , ,642 17,434 90,076 2X4 4 LAMP T12 2, , ,896 2, , ,319 82, , , , ,930 TROFFER 2HSS , ,781 9,787 50,568 2LX , ,607 2SX , , ,762 4LX , ,867 84, ,555 4LX , ,535 8,048 41,584 2X4 4 LAMP T , , , , , , ,839 WRAP , , ,077 4LX 2X4 4 LAMP T WRAP LX 2X4 4 LAMP T , , , ,680 1,930 13, ,200 2,448 12,648 WRAP , ,680 2,563 13,243 4LX 2X4 4 LAMP T , , , , , ,590 1,101 5,691 WRAP , ,806 1,153 5,959 4LX 1X4 1 LAMP STRIP , , , ,776 1LX LX X4 2 LAMP T , , , ,035 5,106 28, ,480 4,437 22,917 INDUSTRIAL LX 4LTX , ,387 5,373 27,760 1X4 2 LAMP T INDUSTRIAL LX 1X4 2 LAMP T , , , ,120 1, , ,400 35, ,545 LOUVERED 2LX , ,830 1,879 9,709 2SX LTX , ,160 1,478 7,638 F20HS , ,450 5,148 26,598 F20SS , ,600 23, ,504 F20XLS , ,207 1X4 2 LAMP T , , , ,039-19,929 29, ,180 29,078 55,258 Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 6 Submitted May 31, 2011

39 , Year 3 Annual Savings Report Jackson County, Mississippi SOUTHERN ENERGY TECHNOLOGIES, INC. Lighting Systems Analysis Report LOUVERED 2LX LTX , ,970 1,673 8,642 F20HS , ,674 4,002 20,676 1X4 2 LAMP T , , , , ,740 1,359 3,099 STRIP , , ,790 2LX 1X4 2 LAMP T , , , , ,234 2,512 5,746 STRIP , , ,156 2LX 1X4 2 LAMP T , , , , ,528 2,740 6,268 STRIP , ,536 1,089 5,625 2LX 1X4 2 LAMP T , , ,492 STRIP , ,339 2LX 1X4 2 LAMP T , , , , ,146 2,452 5,598 TROFFER , , ,033 2LX 1X4 2 LAMP T TROFFER LX 1X4 2 LAMP T VAPOR TIGHT LX 1X4 2 LAMP T , , , ,694 1,316 3,010 VAPOR TIGHT , ,701 2LX 1X4 2 LAMP T , , , ,920-5,152 32, ,136 15,658 35,794 VAPOR TIGHT , ,920 6,221 32,141 2LX 1X4 2 LAMP T , , , ,168-24,103 59, ,400 38,257 80,657 WRAP , , ,500 2HSS 2LX , ,640 6,394 33,034 2SX , ,400 1,296 6,696 4LTX , , ,619 F7S , ,000 2,880 14,880 1X4 2 LAMP T , , , ,465-6,254 15, ,660 11,150 22,810 WRAP , , ,174 2LX 4STWSS , ,099 2,184 11,283 1X4 2 LAMP T , , , ,384-4,250 26, ,632 12,918 29,550 WRAP , ,384 5,132 26,516 2LX 1X4 2 LAMP T WRAP LX 1X4 2 LAMP WALL BRACKET LX 1X3 2 LAMP T WALL BRACKET LX 2X2 2 LAMP U ,528 TROFFER LX 2X2 2 LAMP U , ,681 TROFFER ,048 6LX 2X2 2 LAMP U , , , , ,336 3,341 6,677 TROFFER , , ,143 6LX 1X2 2 LAMP WRAPAROUND LX 1X8 2 LAMP T , , , , ,700 3,980 7,680 Siemens Industry, Inc. - Building Technologies Division Energy and Environmental Solutions Page 7 Submitted May 31, 2011