Building Load and Energy Estimates Analysis. Instructor: Dr. Mumma. October 28, Thesis Building Sponsor s: INOVA Fairfax Hospital

Transcription

1 David Peterson Penn State AE, Mechanical INOVA Fairfax Hospital The INOVA Heart Institute David J. Peterson Mechanical Option Mechanical Technical Report #2b The INOVA HEART INSTITUTE AT INOVA Fairfax Hospital, Falls Church, VA. Mechanical Technical Report #2b Building Load and Energy Estimates Analysis Instructor: Dr. Mumma October 28, 2003 Thesis Building Sponsor s: INOVA Fairfax Hospital and Turner Construction 3300 Gallows Road, Falls Church, VA

2 David Peterson Penn State AE, Mechanical INOVA Fairfax Hospital The INOVA Heart Institute Table of Contents 1.0 Executive Summary 2.0 Design Load Estimates 3.0 Annual Energy Analysis Estimates 4.0 References 5.0 Appendix 2

3 David Peterson Penn State AE, Mechanical INOVA Fairfax Hospital The INOVA Heart Institute 1.0 Executive Summary: The purpose of this report is to understand and model the load and energy consumption of the INOVA Heart Institute. The overall size of the new hospital is approximated at 410,000 sq.ft. The hospital is broken down into 3 wings, two of which serve the majority of the hospital and serve as recovery, patient, and general hospital office and recreation spaces. The third wing or CVOR (Cardio- Vascular-Operating-Rooms) serves as the critical care and operation wing. This wing contains a high quantity of supply air from the two 40,000cfm air handling units located in the penthouse above. The combined air handlers feed into one main duct that branches off and serves a 33,055 sq.ft space of the CVOR wing. The high quantity of air is associated with pressurization and other indoor air quality issues of the hospital. The focus of this report will be on the CVOR wing. This report contains the analysis of loads and energy consumption by the space using both a simple hand approach as well as a more derived computer approach. Through hand calculations a value of approximately 120 tons of cooling was obtained for the space. Through computer analysis with Carrier s HAP program a value of approximately 322 tons of cooling was obtained. Referencing the design documents it is shown that the engineers had intended for a value of approximately 360 tons of cooling. Discrepancies in the totaling cooling can be attributed to factors of safeties provided by the design engineer, very simplified hand solar calculations, as well as unforeseen equipment and their associated load. Calculating energy consumption for the building proved to be a more difficult task. The INOVA Heart Institute is an addition to the existing INOVA Fairfax Hospital. On the property there is a remote central plant which provides both steam and chilled water to the existing as well as to the new facilities. Due to restrictions by the owner and hospital, information about the existing chiller and steam plants was unattainable. For the purposes of gauging and approximate total energy consumption by the CVOR wing a chiller as well as a boiler was sized to meet the loads of the space. Through hand calculations a value of 2,435, KW-hrs per year (approximately: 8,309, K-BTU per year) was obtained for the total energy consumption of the space. Through the computer simulation method a value of approximately 21,636,344 K-BTU per year was obtained. Hand calculations differ from computer simulations because they do not take into account heating in general, more specifically the do not include steam humidification, terminal reheats or preheat coils in the air handlers. The total building operation cost was calculated in Hap to be approximately $76,384. This estimate of cost includes contributions from Air system fans, total cooling and heating needed, pumps, lights and electrical equipment. Cost s were based on Virginia Power s GS-3U rate schedule. The INOVA Heart Institute s Air Handler Penthouse is shown in the photo below courtesy of Turner Construction and is due to open in the Summer of INOVA Photo 1: AHU Penthouse Construction, August 12,

4 David Peterson Penn State AE, Mechanical 2.0 Design Load Estimates: INOVA Fairfax Hospital The INOVA Heart Institute Estimating the design cooling load by hand entails a rather tedious look at all the loads present with in the CVOR wing of the INOVA Heart Institute. A detailed break down of all loads and sources can be found in the hand calculated spreadsheets of Appendix A. The load sources present in area of interest include Lights, People, Medical Equipment, Office Equipment, and some typical Kitchen Equipment. 2.1 Analysis By Hand Mechanical Load Data Total Cooling Load Ft 2 /ton Supply Air 2.42 cfm/ft 2 Ventilation Air cfm/ft 2 INOVA Table 1: Hand Analysis Calculation The hand analysis which was done through a series of spread sheets calculated a value of approximately 120 tons of cooling. 2.2 Analysis By Computer Mechanical Load Data Total Cooling Load Ft 2 /ton Supply Air 2.42 cfm/ft 2 Ventilation Air 0.73 cfm/ft 2 INOVA Table 2: Computer Analysis Calculation The computer analysis done through Carrier s Hap program calculated a value of approximately 322 tons of cooling. 2.3 Original By the Designers Mechanical Load Data Total Cooling Load 92 Ft 2 /ton Supply Air 2.42 cfm/ft 2 Ventilation Air cfm/ft 2 INOVA Table 3: Designer s Calculations From the design documents it is evident that the designers intended for the CVOR wing to have approximately 360 tons of cooling. 4

5 David Peterson Penn State AE, Mechanical 2.3 Conclusions INOVA Fairfax Hospital The INOVA Heart Institute Discrepancies in the totaling cooling can be attributed to factors of safeties provided by the design engineer, more exact solar loads, as well as unforeseen equipment and the associated load. The hospital also contains area shell space for future expansion, over sizing of the equipment now (along with air damper control) may be attributed to such future anticipated loads. The hospital is still under construction and only approximations can be made regarding discrepancies in load. 3.0 Annual Energy Analysis Estimates Due to restrictions by the owner and hospital information about the existing chiller and steam plants was unattainable. For the purposes of gauging and approximate total energy consumption by the CVOR wing a chiller as well as a boiler was sized to meet the loads of the space. The chiller that was selected was an Aircooled packaged reciprocating electric chiller that met the design loads as schedule on the drawings (approximately 368 ton of cooling at 715gpm) The boiler that was selected to meet the heating requirements was an electric resistance boiler (approximately: 5512 MBH at 372gpm with an efficiency of approximately 87%). A Remote steam source was selected in the computer simulation for the purposes of humidifying the air in the AHU s. 3.1 Analysis By Hand Mechanical Energy Analysis per Year Chilled Water Pumps 116, KBTU Fans 4,854, KBTU Lights 2,710, KBTU Equipment 1,004, KBTU Total 8,686,510.9 KBTU INOVA Table 4: Hand Analysis Calculation Mechanical Energy Analysis per Year Chilled Water Pumps 94,350 KBTU Fans 4,836,564 KBTU Lights 2,856,093 KBTU Equipment 995,615 KBTU Cooling 2,491,749 KBTU Heating 10,361,974 KBTU Total 21,636,344 KBTU INOVA Table 4: Computer Analysis Calculation The hand analysis only looks at such equipment as the supply and return fans as well as the chilled water pumps. The Computer simulation is more through and includes the previously mention as well as all the heating and cooling aspects associated with the space. Both incorporate all; lighting, equipment, sensible and latent loads within the space. The above tables show the results for both 5

6 David Peterson Penn State AE, Mechanical INOVA Fairfax Hospital The INOVA Heart Institute methods which are relatively close. Extensive energy hand calculations can be viewed in the Appendix B. 3.2 Annual Estimated Cooling Costs Component Annual Cost ($/ft²) Air System Fans 17, Cooling 8, Heating 35, Pumps Cooling Tower Fans HVAC Sub-Total 62, Lights 10, Electric Equipment 3, Misc. Electric Misc. Fuel Use Non-HVAC Sub-Total 13, Grand Total 76, Conditioned Floor Area ft² INOVA Table 5: Annual Computer Generated Costs These values represent the system if it were entirely run on electricity in actuality it may be cheaper to run the systems equipment on gas or other forms of generation and it may be determined down the road provided access is made available that the equipment in the remote central plant is most definitely not electric. Electric driven equipment is not always the cheapest form of operation. But for the purposes of this report it was used to gauge a simple estimate on power consumption. A summary of the computer simulation and associated calculations can be view in Appendix C. 3.3 Electric Energy Rates The following charges were applied to the energy analysis in the previous section. Virginia Electric and Power Company Schedule GS-3U Distribution Service Charges Basic monthly: $ or $ annual Distribution Demand on all KW: $2.12 per KW Competitive Trans. On Peak Demand: $2.897 per KW Competitive Trans. On Peak KWH: $ per KWH INOVA Table 6: Cost Estimate Information 6

7 David Peterson Penn State AE, Mechanical INOVA Fairfax Hospital The INOVA Heart Institute 3.4 Overall System Costs The following mechanical system costs, supply actual values for the all three wings of the hospital combined and they are further broken down into three main costs Mechanical/ Plumbing/Med.Gas (combined), Sprinklers and Electrical. The system cost represented show that the Mechanical overall cost is the most expensive per square foot of the building. This makes sense due to all the specialty equipment needed to maintain safety with in the critical care environment. System's Cost Type Cost Cost/sq.ft. Sprinkler 836, *Mechanical 17,200, Electrical 9,200, Total: 27,236, *(Includes all Mech., Plumbing, and Med. Gas ) INOVA Table 7: System s Cost At the present time due to security concerns the present information regarding the energy analysis was unattainable. Although requests for information concerning the Energy analysis are currently being reviewed and final confirmation should be supplied in the near future. Through conversations with the general contractor and on-site mechanical engineer it is believed that an entire energy analysis was done before the construction of the actual building. At this time the building is approximately 60 percent complete and is due to open in the Fall of Conclusions: The excluding ducting and piping the majority of the mechanical equipment is mainly located in the basement and penthouse floors. The Chiller and Steam Boilers are not located within the building but are on the property and are located in an existing central plant. For the purposes of this analysis and the inability to obtain information on the existing central plant a chiller and hot water boiler were sized to accommodate and gage an estimate on how much energy would be consumed and the overall cost s associated with running the system in CVOR wing. The mechanical systems for the INOVA Heart Institute can be characterized as non-typical and specialized and have higher amount of safety associated with them. Per square foot the mechanical systems make up approximately 21% of the overall cost of the entire building. 7

8 David Peterson Penn State AE, Mechanical INOVA Fairfax Hospital The INOVA Heart Institute 4.0 References: 1. ASHRAE Standard , Energy Standards for Buildings. 2. Penn State Architectural Engineering Department, Thesis Advisors Mechanical Option. 3. Turner Construction, Construction Drawings, Shop Drawings and Specifications. 4. Virginia Power, Schedule GS-3U /customer/pdf/va/vags3u.pdf 5.0 Appendix : The Appencies are included on my web page below the Mechancial Technical Report 2b 8

9 5.1 Appendix A: Hand Load Estimate Calculations

10 Inputs for the Hand Design Load Calculation Space Conditions Outdoor Air: 4% ASHRAE T (DB): 95 4% ASHRAE T (WB): 78 CVOR (Operating) Spaces: Room Air: T (DB): 65 Supply Air: T (DB): 43.5 Non Operating Spaces: Room Air: T (DB): 75 Supply Air: T (DB): 50.5 Occupant Data Sensible (Btu/hr): 245 Latent (Btu/hr): 205 GYM Sensible (Btu/hr): 295 Latent (Btu/hr): 455 U-Values (Btu/(hr-ft2-F)): Roof: Wall: Windows: 0.35 Window Data (Ft 2 ): Height: 6 Width: 6 Area: 36

11 Floor Analysis of CVOR Wing Space Area SQ. FT. Design SQ FT/ Person Occupant Load Occup Occupant Latent Load # of People Btu/hr Lighting Load 2 1 Special-Storage/Supply Special-Storage/Supply Special-Storage/Supply Special-Storage/Supply Special-Storage/Supply Special-Storage/Supply Corridor ,273 9, Corridor CVOR ,753 8, CVOR ,776 8, Clean Area ,558 12, Prep Area ,524 11, Toilets Toilets Data/Electric Lounge ,621 4, Storage/Supply low Storage/Supply low Special-Storage/Supply ,093 4, Special-Storage/Supply Office Office ,252 3, Office Gym ,115 11, Corridor ,306 8, Toilets Locker ,166 2, Locker ,994 7, Lounge ,650 5, Lounge ,511 6, Classroom ,870 3, Data/Elec Sleeproom Occup Sensible Load Btu/hr General Lights W/ft2 General Lights W Total Lights Btu/hr Equip. W/ft2 Electrical Equipment Load Total Equip W Total Equip. Btu/hr

12 Floor Space Wall Envelope Load Window Envelope Load Roof Envelope Exterior Walls Window Roof Wall Window Roof Wall North South East West Envelope Envelope Area Envelope N (feet) S (feet) E (feet) W (feet) Height Btu/hr Num Area Num Area Num Area Num Area Btu/hr FT 2 Btu/hr 2 1 Storage/Supply Storage/Supply Storage/Supply Storage/Supply Storage/Supply Storage/Supply Corridor Corridor CVOR CVOR Clean Area Prep Area Toilets Toilets Data/Electric Lounge Storage/Supply low Storage/Supply low Storage/Supply Storage/Supply Office Office Office Gym Corridor Toilets Locker Locker Lounge Lounge Classroom Data/Elec Sleeproom

13 Floor Space Occupant Latent Load Btu/hr Occupant Sensible Load Btu/hr Total Lights Btu/hr Total Equip. Btu/hr Wall Envelope Btu/hr Window Envelope Btu/hr Roof Envelope Btu/hr Total Load Btu/hr 2 1 Storage/Supply , Storage/Supply , Storage/Supply , Storage/Supply , Storage/Supply , Storage/Supply , Corridor 8,273 9, , Corridor , CVOR 6,753 8, , CVOR 6,776 8, , Clean Area 10,558 12, , Prep Area 9,524 11, , Toilets , Toilets Data/Electric , Lounge 3,621 4, , Storage/Supply low Storage/Supply low , Storage/Supply 4,093 4, , Storage/Supply , Office , Office 3,252 3, , Office , Gym 17,115 11, , Corridor 7,306 8, , Toilets Locker 2,166 2, , Locker 5,994 7, , Lounge 4,650 5, , Lounge 5,511 6, , Classroom 2,870 3, , Data/Elec , Sleeproom ,597

14 Design Loads Units Occupant Latent Load Occupant Sensible Load Total Lights Total Equip. Wall Envelope Window Envelope Roof Envelope Outdoor Air Load Btu/hr 105, , , ,690 11,285 16,632 10, ,357,059 Ton Total Load Total Envelope Load (Btu/hr): 38,165 Total Conditioned Square Footage: Total Supply Air (CFM) From Designer: 80,000 Total Ventilation Air (CFM) From Designer: 24,000 Overall breakdown of Tonage Occupant Latent Load Occupant Sensible Load 8% 10% Total Cooling Load (ft 2 /ton): Supply Air (cfm/ft 2 ): Ventilation Air (cfm/ft2): Outdoor Air Load 48% Roof Envelope 1% Window Envelope Wall Envelope Total Equip. 5% Total Lights 26% 1% 1%

15 5.2 Appendix B: Hand Energy Estimate Calculations

16 ENERGY INPUTS Square Footage Flow Rates (cfm): Supply Air 61,400 Ventilation Air 18,600 Occupant Data No. of occupants 471 Sensible (Btu/hr): 250 Latent (Btu/hr): 200 Air Conditions Supply Temp (F) 50.5 Space Temp (F) 75 W (gr/lb) 64.6 RH 50% h(btu/lbda) 28.1 Additional Parameters Lighting Load (Btu/hr) 321,733 Equipment Load (Btu/hr) 59,374 Overall Envelope (Btu/hr) 38,044

17 ENERGY LOAD CALCULATION HR Range (gr/lb) HR (gr/lb) BIN DATA DB (F) WB (F) h (BTU/lb) QOAsen (Btu) QOAlat (Btu) Lights (Btu) Equipemnt (Btu) Hrs 135 to to to E to E to E to E E to E E E to E E E E to E E to E E E to E E to E E to E E E to E E E to E E E to E E to E E to E E E E to E E E E to E E E E to E E E E to E E E E to E E E E to E E E E to E E E E to E E E E to E E E to People Sensible (Btu) LOADS People Latent (Btu) DAY QOAlat + PEOPLE LATENT (Btu) Envelope (Btu) TOTAL Btu TOTAL Tons

18 EQUIPMENT INFORMATION Supply Air Flow Rate 61,400 scfm Lights 2 W/sf Tdb 75 F OA Flow Rate 18,600 scfm Equipment 2 W/sf W 64.6 gr/lb Return Air Flow Rate 90,000 scfm Overall UA Btu/(hr F) RH 50% No. People 1200 h 28.1 Btu/(lbda) Satemp 55 F (DB) AHU 11 - FAN LOAD-SUPPLY FAN (40,000 CFM) AHU 12 - FAN LOAD-SUPPLY FAN (40,000 CFM) P inwg 8.5 Fan BHP: 68.4 BHP P inwg 8.5 Fan BHP: 68.4 BHP fan eff 0.75 Fan kw: kw fan eff 0.75 Fan kw: kw motor eff 0.95 motor eff 0.95 CFM 40,000 CFM 40,000 AHU 11 - FAN LOAD-RETURN FAN (32,000 CFM) AHU 12 - FAN LOAD-RETURN FAN (32,000 CFM) P inwg 3 Fan BHP: 40.6 BHP P inwg 3 Fan BHP: 40.6 BHP fan eff 0.75 Fan kw: kw fan eff 0.75 Fan kw: kw motor eff 0.95 motor eff 0.95 CFM 32,000 CFM 32,000 CHILLED WATER PUMPS for secondary system #1 Recirculation cooling coil pumps for AHU 11 GPM 120 Pump BHP: BHP GPM 130 Pump BHP: BHP head (ft) 45 Pump kw: kw head (ft) 20 Pump kw: kw pump eff 0.81 pump eff 0.81 motor eff 0.95 motor eff 0.95 SG 1 SG 1 CHILLED WATER PUMPS for secondary system #2 Recirculation cooling coil pumps for AHU 12 GPM 120 Pump BHP: BHP GPM 130 Pump BHP: BHP head (ft) 45 Pump kw: kw head (ft) 20 Pump kw: kw pump eff 0.81 pump eff 0.81 motor eff 0.95 motor eff 0.95 SG 1 SG 1

19 Evaluation of no Economizer system HR Range (gr/lb) HR (gr/lb) BIN DATA DB (F) WB (F) h (BTU/lb) LOAD FANS PUMPS CHILLED WATER TOTAL FANS PUMPS Tons (kw hr) (kw hr) Hrs 135 to to to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to , to Totals 332,

20 TOTALS Using Central Chilled Water Plant Data KWh/year Chilled Water Pumps 34, Supply/Return Fans 1,422, Lights 826, Equipment 152, Total 2,435,436.23

21 5.3 Appendix C: HAP Analysis

22 Air System Sizing Summary for Combined AHU (2) Project Name: INOVA HEART HAP 10/29/2003 Prepared by: psuae 07:49PM Air System Information Air System Name Combined AHU (2) Equipment Class CW AHU Air System Type CAV/RH Number of zones 2 Floor Area ft² Sizing Calculation Information Zone and Space Sizing Method: Zone CFM Sum of space airflow rates Space CFM Individual peak space loads Calculation Months Sizing Data Jan to Dec Calculated Central Cooling Coil Sizing Data Total coil load Tons Total coil load MBH Sensible coil load MBH Coil CFM at Jul CFM Max block CFM CFM Sum of peak zone CFM CFM Sensible heat ratio ft²/ton BTU/(hr-ft²) Water 15.0 F rise gpm Load occurs at Jul 1500 OA DB / WB 95.0 / 76.0 F Entering DB / WB 78.1 / 62.7 F Leaving DB / WB 46.5 / 44.3 F Coil ADP 38.6 F Bypass Factor Resulting RH 40 % Design supply temp F Zone T-stat Check 2 of 2 OK Max zone temperature deviation 0.0 F Preheat Coil Sizing Data No heating coil loads occurred during this calculation. Humidifier Sizing Data Max steam flow at Des Htg lb/hr Airflow Rate CFM Air mass flow lb/hr Moisture gain lb/lb Supply Fan Sizing Data Actual max CFM CFM Standard CFM CFM Actual max CFM/ft² 2.42 CFM/ft² Fan motor BHP BHP Fan motor kw kw Return Fan Sizing Data Actual max CFM CFM Standard CFM CFM Actual max CFM/ft² 2.42 CFM/ft² Fan motor BHP BHP Fan motor kw kw Outdoor Ventilation Air Data Design airflow CFM CFM CFM/ft² 0.73 CFM/ft² CFM/person CFM/person Hourly Analysis Program v.4.1 Page 1 of 1

23 Annual Cost Summary INOVA HEART HAP 10/29/2003 psuae 06:02PM Table 1. Annual Costs INOVA BLDG Component Air System Fans 17,380 Cooling 8,893 Heating 35,932 Pumps 339 Cooling Tower Fans 0 HVAC Sub-Total 62,544 Lights 10,263 Electric Equipment 3,578 Misc. Electric 0 Misc. Fuel Use 0 Non-HVAC Sub-Total 13,841 Grand Total 76,384 Table 2. Annual Cost per Unit Floor Area INOVA BLDG Component ($/ft²) Air System Fans Cooling Heating Pumps Cooling Tower Fans HVAC Sub-Total Lights Electric Equipment Misc. Electric Misc. Fuel Use Non-HVAC Sub-Total Grand Total Gross Floor Area (ft²) Conditioned Floor Area (ft²) Note: Values in this table are calculated using the Gross Floor Area. Table 3. Component Cost as a Percentage of Total Cost INOVA BLDG Component ( % ) Air System Fans 22.8 Cooling 11.6 Heating 47.0 Pumps 0.4 Cooling Tower Fans 0.0 HVAC Sub-Total 81.9 Lights 13.4 Electric Equipment 4.7 Misc. Electric 0.0 Misc. Fuel Use 0.0 Non-HVAC Sub-Total 18.1 Grand Total Hourly Analysis Program v.4.1 Page 1 of 1

24 Billing Details - Electric - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM 1. Component Charges Customer Billing Period Energy Charges Demand Charges Charges Taxes Total Charge Jan 1,270 3,596 1, ,304 Feb 1,102 3,588 1, ,127 Mar 1,164 3,748 1, ,349 Apr 1,229 3,723 1, ,390 May 1,247 3,852 1, ,536 Jun 966 3,914 1, ,317 Jul 1,081 3,957 1, ,475 Aug 978 3,993 1, ,408 Sep 1,013 3,967 1, ,417 Oct 1,300 3,738 1, ,475 Nov 1,120 3,706 1, ,263 Dec 1,278 3,606 1, ,322 Totals 13,746 45,387 17, , Totals Billing Period Total Charges Total Consumption (kwh) Avg Price ($/kwh) Jan 6, , Feb 6, , Mar 6, , Apr 6, , May 6, , Jun 6, , Jul 6, , Aug 6, , Sep 6, , Oct 6, , Nov 6, , Dec 6, , Totals 76,384 6,233, Consumption Totals Billing Period Peak (kwh) Mid-Peak (kwh) Normal Peak (kwh) Off-Peak (kwh) Overall (kwh) Jan 223, , ,936 Feb 194, , ,039 Mar 204, , ,145 Apr 216, , ,418 May 219, , ,008 Jun 170, , ,423 Jul 190, , ,782 Aug 172, , ,980 Sep 178, , ,716 Oct 228, , ,042 Nov 197, , ,395 Dec 224, , ,246 Totals 2,420, ,812,997 6,233,128 Hourly Analysis Program v.4.1 Page 1 of 2

25 Billing Details - Electric - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM 4. Billing Demands Billing Period Peak (kw) Mid-Peak (kw) Normal Peak (kw) Off-Peak (kw) Overall (kw) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Maximum Demands Billing Period Peak (kw) Mid-Peak (kw) Normal Peak (kw) Off-Peak (kw) Overall (kw) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Time Of Maximum Demands Billing Period Peak (m/d/h) Mid-Peak (m/d/h) Normal Peak (m/d/h) Off-Peak (m/d/h) Overall (m/d/h) Jan 1/9/0900 n/a n/a 1/9/0100 1/9/0900 Feb 2/3/0900 n/a n/a 2/2/1500 2/2/1500 Mar 3/5/0700 n/a n/a 3/5/0600 3/5/0700 Apr 4/14/1500 n/a n/a 4/6/1600 4/6/1600 May 5/13/1400 n/a n/a 5/31/1900 5/31/1900 Jun 6/24/1200 n/a n/a 6/30/0900 6/24/1200 Jul 7/3/1300 n/a n/a 7/26/1500 7/3/1300 Aug 8/18/1200 n/a n/a 8/17/1300 8/17/1300 Sep 9/1/1200 n/a n/a 9/1/0900 9/1/1200 Oct 10/14/1600 n/a n/a 10/18/ /18/0100 Nov 11/28/0800 n/a n/a 11/28/ /28/0800 Dec 12/5/0800 n/a n/a 12/5/ /5/0600 Hourly Analysis Program v.4.1 Page 2 of 2

26 Monthly Energy Use by Energy Type - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM 1. HVAC Energy Use Month Electric (kwh) Natural Gas (na) Fuel Oil (na) Propane (na) Remote HW (na) Remote Steam () Remote CW (na) Jan 420, ,733 0 Feb 379, ,700 0 Mar 422, ,881 0 Apr 411, ,126 0 May 432, ,366 0 Jun 430, Jul 455, Aug 451, Sep 432, Oct 432, ,605 0 Nov 412, ,788 0 Dec 423, ,710 0 Totals 5,104, , Non-HVAC Energy Use Electric Natural Gas Fuel Oil Propane Remote HW Remote Steam Month (kwh) (na) (na) (na) (na) () Jan 95, Feb 86, Mar 95, Apr 92, May 95, Jun 92, Jul 95, Aug 95, Sep 92, Oct 95, Nov 92, Dec 95, Totals 1,128, Hourly Analysis Program v.4.1 Page 1 of 1

27 Monthly Energy Use by Component - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM 1. Monthly Energy Use by System Component Component Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Air System Fans (kwh) Cooling Electric (kwh) Natural Gas (na) Fuel Oil (na) Propane (na) Remote HW (na) Remote Steam () Remote CW (na) Heating Electric (kwh) Natural Gas (na) Fuel Oil (na) Propane (na) Remote HW (na) Remote Steam () Pumps (kwh) Clg. Tower Fans (kwh) Lighting (kwh) Electric Eqpt. (kwh) Misc. Electric (kwh) Misc. Fuel Natural Gas (na) Propane (na) Remote HW (na) Remote Steam () Hourly Analysis Program v.4.1 Page 1 of 1

28 Monthly Component Costs - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM Cost Air System Fans Cooling Heating Pumps Lights Electric Equipment Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month 1. HVAC Component Costs Air System Fans Cooling Heating Pumps Cooling Towers HVAC Total Month January 1, , ,133 February 1, , ,990 March 1, , ,175 April 1, , ,215 May 1, , ,349 June 1, , ,197 July 1,413 1,138 2, ,351 August 1,411 1,072 2, ,287 September 1, , ,285 October 1, , ,299 November 1, , ,113 December 1, , ,155 Total 17,380 8,893 35, , Non-HVAC Component Costs Month Lights Electric Equipment Misc. Electric Misc. Fuel Use Non-HVAC Total Grand Total January ,171 6,304 February ,139 6,129 March ,175 6,350 April ,175 6,390 May ,187 6,536 June ,120 6,317 July ,125 6,476 August ,123 6,410 September ,133 6,418 October ,176 6,475 November ,150 6,263 December ,167 6,322 Total 10,263 3, ,841 76,384 Hourly Analysis Program v.4.1 Page 1 of 1

29 Energy Budget by Energy Source - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM 1. Annual Coil Loads Load Component (kbtu) (kbtu/ft²) Cooling Coil Loads 17,990, Heating Coil Loads 9,069, Grand Total 27,059, Energy Consumption by Energy Source Site Energy Site Energy Source Energy Source Energy Component (kbtu) (kbtu/ft²) (kbtu) (kbtu/ft²) HVAC Components Electric 17,415, ,198, Natural Gas Fuel Oil Propane Remote Hot Water Remote Steam 368, , Remote Chilled Water HVAC Sub-Total 17,784, ,567, Non-HVAC Components Electric 3,851, ,756, Natural Gas Fuel Oil Propane Remote Hot Water Remote Steam Non-HVAC Sub-Total 3,851, ,756, Grand Total 21,636, ,324, Notes: 1. 'Cooling Coil Loads' is the sum of all air system cooling coil loads. 2. 'Heating Coil Loads' is the sum of all air system heating coil loads. 3. Site Energy is the actual energy consumed. 4. Source Energy is the site energy divided by the electric generating efficiency (28.0%). 5. Source Energy for fuels equals the site energy value. 6. Energy per unit floor area is based on the gross building floor area. Gross Floor Area ft² Conditioned Floor Area ft² Hourly Analysis Program v.4.1 Page 1 of 1

30 Energy Budget by System Component - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM 1. Annual Coil Loads Load Component (kbtu) (kbtu/ft²) Cooling Coil Loads 17,990, Heating Coil Loads 9,069, Grand Total 27,059, Energy Consumption by System Component Site Energy Site Energy Source Energy Source Energy Component (kbtu) (kbtu/ft²) (kbtu) (kbtu/ft²) Air System Fans 4,836, ,273, Cooling 2,491, ,899, Heating 10,361, ,058, Pumps 94, , Cooling Towers HVAC Sub-Total 17,784, ,567, Lights 2,856, ,200, Electric Equipment 995, ,555, Misc. Electric Misc. Fuel Use Non-HVAC Sub-Total 3,851, ,756, Grand Total 21,636, ,324, Notes: 1. 'Cooling Coil Loads' is the sum of all air system cooling coil loads. 2. 'Heating Coil Loads' is the sum of all air system heating coil loads. 3. Site Energy is the actual energy consumed. 4. Source Energy is the site energy divided by the electric generating efficiency (28.0%). 5. Source Energy for fuels equals the site energy value. 6. Energy per unit floor area is based on the gross building floor area. Gross Floor Area ft² Conditioned Floor Area ft² Hourly Analysis Program v.4.1 Page 1 of 1

31 Annual HVAC & Non-HVAC Cost Totals - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM HVAC 81.9% 18.1% Non-HVAC 1. Annual Costs Annual Cost Percent of Total Component ($/yr) ($/ft²) (%) HVAC 62, Non-HVAC 13, Grand Total 76, Note: Cost per unit floor area is based on the gross building floor area. Gross Floor Area ft² Conditioned Floor Area ft² Hourly Analysis Program v.4.1 Page 1 of 1

32 Annual Energy Costs - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM HVAC Electric 81.9% 18.1% Non-HVAC Electric 1. Annual Costs Annual Cost Percent of Total Component ($/yr) ($/ft²) (%) HVAC Components Electric 62, Natural Gas Fuel Oil Propane Remote Hot Water Remote Steam Remote Chilled Water HVAC Sub-Total 62, Non-HVAC Components Electric 13, Natural Gas Fuel Oil Propane Remote Hot Water Remote Steam Non-HVAC Sub-Total 13, Grand Total 76, Note: Cost per unit floor area is based on the gross building floor area. Gross Floor Area ft² Conditioned Floor Area ft² Hourly Analysis Program v.4.1 Page 1 of 1

33 Annual Component Costs - INOVA BLDG INOVA HEART HAP 10/29/2003 psuae 06:02PM Cooling 11.6% 22.8% Air System Fans 4.7% Electric Equipment Heating 47.0% 13.4% Lights 0.4% Pumps 1. Annual Costs Annual Cost Percent of Total Component ($/ft²) (%) Air System Fans 17, Cooling 8, Heating 35, Pumps Cooling Tower Fans HVAC Sub-Total 62, Lights 10, Electric Equipment 3, Misc. Electric Misc. Fuel Use Non-HVAC Sub-Total 13, Grand Total 76, Note: Cost per unit floor area is based on the gross building floor area. Gross Floor Area ft² Conditioned Floor Area ft² Hourly Analysis Program v.4.1 Page 1 of 1

34 Annual Energy and Emissions Summary INOVA HEART HAP 10/29/2003 psuae 06:02PM Table 1. Annual Costs INOVA BLDG Component HVAC Components Electric 62,543 Natural Gas 0 Fuel Oil 0 Propane 0 Remote HW 0 Remote Steam 0 Remote CW 0 HVAC Sub-Total 62,543 Non-HVAC Components Electric 13,841 Natural Gas 0 Fuel Oil 0 Propane 0 Remote HW 0 Remote Steam 0 Non-HVAC Sub-Total 13,841 Grand Total 76,384 Table 2. Annual Energy Consumption Component INOVA BLDG HVAC Components Electric (kwh) 5,104,236 Natural Gas (na) 0 Fuel Oil (na) 0 Propane (na) 0 Remote HW (na) 0 Remote Steam () 368,910 Remote CW (na) 0 Non-HVAC Components Electric (kwh) 1,128,899 Natural Gas (na) 0 Fuel Oil (na) 0 Propane (na) 0 Remote HW (na) 0 Remote Steam () 0 Totals Electric (kwh) 6,233,135 Natural Gas (na) 0 Fuel Oil (na) 0 Propane (na) 0 Remote HW (na) 0 Remote Steam () 368,910 Remote CW (na) 0 Hourly Analysis Program v.4.1 Page 1 of 3

35 Annual Energy and Emissions Summary INOVA HEART HAP 10/29/2003 psuae 06:02PM Table 3. Annual Emissions Component INOVA BLDG CO2 (lb) 0 SO2 (kg) 0 NOx (kg) 0 Table 4. Annual Cost per Unit Floor Area INOVA BLDG Component ($/ft²) HVAC Components Electric Natural Gas Fuel Oil Propane Remote HW Remote Steam Remote CW HVAC Sub-Total Non-HVAC Components Electric Natural Gas Fuel Oil Propane Remote HW Remote Steam Non-HVAC Sub-Total Grand Total Gross Floor Area (ft²) Conditioned Floor Area (ft²) Note: Values in this table are calculated using the Gross Floor Area. Hourly Analysis Program v.4.1 Page 2 of 3

36 Annual Energy and Emissions Summary INOVA HEART HAP 10/29/2003 psuae 06:02PM Table 5. Component Cost as a Percentage of Total Cost INOVA BLDG Component ( % ) HVAC Components Electric 81.9 Natural Gas 0.0 Fuel Oil 0.0 Propane 0.0 Remote HW 0.0 Remote Steam 0.0 Remote CW 0.0 HVAC Sub-Total 81.9 Non-HVAC Components Electric 18.1 Natural Gas 0.0 Fuel Oil 0.0 Propane 0.0 Remote HW 0.0 Remote Steam 0.0 Non-HVAC Sub-Total 18.1 Grand Total Hourly Analysis Program v.4.1 Page 3 of 3