EBCx of the Connecticut Convention Center Complex

Transcription

1 EBCx of the Connecticut Convention Center Complex Presentation and Panel Discussion David Vallerie, Principal, Strategic Building Solutions May 20, 2014

2 AIA Quality Assurance The Building Commissioning Association is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of the Completion for both AIA members and non-aia members are available upon request. This program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 2

3 Session Learning Objectives EBCx of the Connecticut Convention Center Complex At the end of this session participants will be able to: 1. Share in-depth technical understanding and lessons learned from a "real world" case study of RCx efforts under utility program consisting of various facility types 2. Explore challenges and solutions when working in public multi-facility complexes served by a large central plant 3. Apply findings at each facility type, savings calculation methodology, M&V and persistence strategies to other projects 4. Provide advice and solutions to owners, providers and stakeholders from panelists who helped implement the program 3

4 Presentation Learning Objectives At the end of this presentation participants will be able to: Obtain an in depth technical understanding and lessons learned from a "real world" case study of RCx efforts under utility program at local Hartford complex consisting of various facility types Explore challenges and solutions when working in public multi-facility complexes served by a large central plant Benefit from a panel discussion forum for Owners & Providers and to receive advice and solutions from panelists that helped implement the program 4

5 Agenda Brief Overview of the Northeast Utilities RCx Program Review of the RCx Program at the Entities at Adriaen's Landing Panel Discussion 5

6 NU RCx Program Overview Planning Phase Investigation Phase Implementation Phase Turnover Phase Persistence Phase Development of Retro-Commissioning goals, facility requirements, identify areas of opportunity, and submit a Survey Report. Paid for by Energize CT. Field inspections, data gathering, testing and analysis to accurately assess system performance and further refine the areas of opportunities into ECM s. Paid for by Energize CT*. The desired ECM s are completed and the results and performance are verified. Up to 40% incentive by Energize CT. The systematic transition from a commissioning activity and the commissioning team to standard operating practice and the operations and maintenance team. Implementation of systems and tools to support both the persistence benefits and continuous performance improvement over time. 6

7 Project Highlights CT Science Center Hartford Marriot Downtown CT Convention Center Central Utility Plant 7

8 Facility Summary Central Utility Plant 9,500 GSF Constructed in 2003 Two high pressure steam 600 hp and one 400 hp dual fuel Cleaver Brooks Fire Tube Boilers 800 ton Trane Centrifugal chiller with VFD 1200 ton Trane Centrifugal chiller with VFD 1200 ton 2 stage steam absorption chiller One 20 hp and two 30 hp primary CHW loop pumps One 75 hp and two 100 hp condenser water pumps Three 100 hp secondary CHW pumps serving the Convention Center Two 150 hp secondary CHW pumps serving the Marriot and Science Center Three Marley induced draft cooling towers, six cells total each with a 50 hp fan All steam and CHW leaving the plant is metered Siemens DDC Control System 8

9 Utility Summary Central Utility Plant Base Year Consumption (2012) Electricity 3,192,000 kwh, $467,181 Natural Gas 710,000 therms, $534,630 #2 Fuel Oil No Consumption 9

10 Utility Summary Central Utility Plant 10

11 Utility Summary Central Utility Plant 11

12 Utility Summary Central Utility Plant 12

13 Utility Summary Central Utility Plant 13

14 RCx Program Highlights Central Utility Plant Building Survey Completed on 2/19/2013 Final Survey Report Dated 4/18/2013 Survey Report Presented on 4/18/2013 Investigation Agreement Executed on 5/21/2013 Master List of Findings Presented on 12/12/2013 Implementation Phase Letter of Agreement on 3/13/2014 Implementation Phase to be Completed June ECM s, Impl. Cost - $139,430, $42,265 Annual Savings, 3.3 year PB Total Incentive from Utility was $52,936 14

15 ECM Summary Central Utility Plant Optimize Chilled Water Pumping System for the Centrifugal Chillers (CH-2 & CH-3) by Installing VFDs on the Primary CHW Pumps (P-6 & P-7) Optimize Condenser Water System by Staging the Cooling Towers and Add Condenser Water Reset for Chillers CH-2 & CH-3 Optimize Condenser Water System During Free Cooling Mode Replace Existing Forced Draft Actuators Associated with the Combustion Management System for Boilers B-1 Through B-3 Investigate the Feasibility of Lowering Steam Pressure for Seasonal Control 15

16 Facility Summary CT Convention Center 540,000 GSF 460,000 conditioned GSF 5 Stories Lower 2 Stories are Garage Constructed in 2003 Large exhibit hall, atrium, pre-functional areas, various offices and conference rooms Receives high pressure steam and chilled water from the Central Utility Plant Three 100 hp secondary CHW pumps located in the CUP Two 30 hp HW heating pumps Has 19 AHU s with HW preheat coils and CHW coils various types 840,800 cfm of rated supply air 148 VAV boxes Hot water converter for preheat coils and fan coil units Andover DDC System Business offices are open Monday through Friday 8am to 6pm. 16

17 Utility Summary CT Convention Center Base Year Consumption (2010) Site Energy Intensity 32 kbtu/ft2/yr Electricity 5,698,800 kwh, $1,180,932 Steam 32,989 MLBS, $278,863 Chilled Water 1,428,000 Ton-Hrs, $159,170 17

18 Utility Summary CT Convention Center 18

19 Utility Summary CT Convention Center 19

20 Utility Summary CT Convention Center 20

21 RCx Program Highlights CT Convention Center Building Survey Completed on 8/31/2011 Final Survey Report Dated 10/6/2011 Survey Report Presented on 10/18/2011 Investigation Agreement Executed on 12/8/2011 Master List of Findings Presented on 6/28/2012 Implementation Phase Letter of Agreement on 9/26/2012 Implementation Phase Completed December ECM s, Impl. Cost - $406,701, $135,314 Annual Savings, 3.0 year PB Total Incentive from Utility was $98,381 21

22 ECM Summary CT Convention Center Optimize Secondary CHW System Optimize AHU-14 VAV System Serving the Administrative Offices and Add Space Occupancy Control for VAV Boxes Install Melink Hood Control System for KEF-1 through 4 and Re-Design AHU-6 operation for the Kitchen Areas Optimize AHU-4, AHU-15 and AHU-17 VAV Units, Calibrate VAV Boxes and Add Static Pressure Reset Optimize AHU-2, 3, 8 & 9 Rooftop Units and Modify VFD Control Serving the Exhibit Halls Optimize AHU-12 & 13 Units serving the Pre-function and Atrium Areas Optimize HW System Control for HX-1,2 Serving AHU Preheat & Reheat Coils and VAV Boxes (Year-round Operation) Enhance HW System Control for HX-3 thru HX-7 Serving terminal Units, Perimeter Radiation & Radiant Flooring Investigate the HW Snow Melt System Control for HX-8 Optimize AHU-5, 7A & 7B Serving Ballrooms A, B & C and Enhance VFD Control Sequence Optimize AHU-1 & 10 VAV Systems serving Meeting Rooms and Add Space Occupancy Control for VAV Boxes in Meeting Rooms 22

23 Facility Summary Hartford Marriott Downtown 320,000 GSF 21 Stories, 409 Guest Rooms Constructed in 2005 Ground floor has main lobby, restaurant, kitchen, coffee shop, and a bar Second floor has administrative and operational offices and mechanical spaces Third floor has a large ballroom, pre-functional areas, meeting and conference rooms Floors four through 20 have 409 guest rooms The 21st floor has a pool, Jacuzzi, and fitness center Receives high pressure steam and chilled water from the Central Utility Plant 150 hp secondary CHW pumps located in the CUP & 60 hp tertiary pumps CHW plate and frame heat exchanger Two 50 hp HW heating pumps Has 12 VAV AHU s with HW preheat coils and CHW coils Three Kitchen exhaust fans and make up systems Hot water converter for preheat coils and fan coil units Andover DDC System Business offices are open Monday through Friday 8am to 6pm. 23

24 Utility Summary Hartford Marriott Downtown Base Year Consumption (2012) Site Energy Intensity 171 kbtu/ft2/yr Electricity 4,248,000 kwh, $546,054 Steam 19,050 MLBS, $167,872 Chilled Water 1,356,230 Ton-Hrs, $135,568 24

25 Utility Summary Hartford Marriott Downtown 25

26 Utility Summary Hartford Marriott Downtown 26

27 Utility Summary Hartford Marriott Downtown 27

28 Utility Summary Hartford Marriott Downtown 28

29 RCx Program Highlights Hartford Marriott Downtown Building Survey Completed on 4/25/2013 Survey Report Dated 5/7/2013 Survey Report Presented on 5/14/2013 Investigation Agreement Executed on 5/31/2013 Master List of Findings Presented on 11/1/2013 Implementation Phase Letter of Agreement on 1/3/2014 Just Finishing the Implementation Phase 6 of the 9 ECM s, Impl. Cost - $239,936, $89,239 Annual Savings, 2.7 year PB Total Incentive from Utility was $95,974 29

30 ECM Summary Hartford Marriott Downtown Enhance The Secondary and Tertiary CHW Systems Investigate the Feasibility of Automating and Lowering the Steam Pressure Serving the Kitchen Equipment Optimize AHU VAV Systems (AHU-2 & 5) Optimize Constant Volume AHUs (AHU-6, 7 & 10) Optimize AHU-1 & Hood Exhaust Systems Serving the Restaurant & Kitchen Optimize AHU-4 VAV System and Add Occupancy Control for Ballrooms Optimize AHU-3 VAV System and Add Occupancy Control for (6) Meeting Rooms 30

31 Facility Summary CT Science Center 154,351 GSF 7 Stories Open Atrium, theatre, restaurant, gift shop, offices, exhibits and galleries Construction Completed in 2009 Receives high pressure steam and chilled water from the Central Utility Plant 150 hp secondary CHW pumps located in the CUP & 30 hp tertiary pumps in CSC 200 kw fuel cell rejecting heat into the hot water heating system Has 12 VAV AHU s with steam preheat coils and CHW coils 3 AHU s have heat recovery wheels, 4 AHU s have face and by-pass dampers Kitchen exhaust fan and make up system Hot water converter for reheat coils and fan coil units Automated Logic DDC System Open to public Tuesday to Sunday 10am to 5pm 31

32 Utility Summary CT Science Center Base Year Consumption (2013) Site Energy Intensity 204 kbtu/ft2/yr Grid Electricity 652,198 kwh, $102,564 Natural Gas (Fuel Cell) 156,950 CCF, $107,145 Natural Gas (Cooking) 2,798 CCF, $3,591 Steam 6,325 MLBS, $415,665 Chilled Water 447,448 Ton-Hrs, $ Included in Steam 32

33 Utility Summary CT Science Center 33

34 Utility Summary CT Science Center 34

35 Utility Summary CT Science Center 35

36 Utility Summary CT Science Center 36

37 RCx Program Highlights CT Science Center Building Survey Completed on 3/23/2014 Survey Report Dated 4/9/2014 Survey Report Presented on 4/18/2014 Investigation Agreement - Pending Just Getting Ready to Start the Investigation Phase 4 of the 7 ECM s will be Investigated Cost - $74,500 to $100,900, $25,890 to $40,000 Annual Savings, 1.9 to 3.9 year PB Total Incentive from Utility will be Up to 40% of the Installed Cost 37

38 ECM Summary CT Science Center Investigate Installation of CHW Tertiary Pump By-Pass Control & Reducing Excessive CHW Flows throughout the Building Investigate Building Supply & Exhaust Air Pressurization Control Optimize (12)VAV AHU Systems and Calibrate All VAV Optimize Kitchen MAU-1 and Hood Exhaust Systems 38

39 RCx Program Highlights Summary Total Number of ECM s: 26 Total ECM Implementation Cost: $873,067 Total Annual Electrical Savings: $194,198 Total Annual Metered Utility Savings: $105,654 Total Annual Savings: $299,852 Payback: 2.9 years Total Utility Incentive: $282,091 Payback with Incentive: 2.0 years Note: CT Science Center information was based on the Survey Report 39

40 Panel Discussion Introductions David McIntosh Northeast Utilities Service Company Darryl Sauro New England Mechanical Services, CUP Chief Engineer George Strileckis Waterford Hotel Group, Marriot Chief Engineer John Demetrio Waterford Group, CT CC Chief Engineer Ed Lane CT Science Center, Director of Facilities & Exhibit Support Michael Costelli The Waterford Group, CT CC General Manager Anthony Lazzaro Capital City Economic Development Authority, Deputy Director & General Counsel Roy Gagnon Strategic Building Solutions, Project Manager 40

41 Panel Discussion Topics Are there any challenges related to the fact that three facilities with very different load profiles are all served by the same CUP? Any benefits? Did the ECMs from one facility affect the others? All facilities were not in the RCx Program at the same time. Was this a concious decision? Should all of the facilities been in the RCx Program at the same time? In hind site. 41

42 Panel Discussion Topics What were the biggest technical challenges or issues? What were the biggest non-technical challenges or issues? Lessons learned or advice to others? 42

43 EBCx of the Connecticut Convention Center Complex Strategic Building Solutions