STANFORD UNIVERSITY MEDICAL CENTER FACILITIES RENEWAL AND REPLACEMENT PROJECT UTILITIES AND SERVICES

Transcription

1 Revised 3/10 STANFORD UNIVERSITY MEDICAL CENTER FACILITIES RENEWAL AND REPLACEMENT PROJECT UTILITIES AND SERVICES This section contains the preliminary information for utility services to the following new structures: Stanford Hospital and Clinics - (SHC) Lucile Packard Children s Hospital (LPCH) Hoover Medical Office Building (MOB) SoM Foundations in Medicine (FIM) buildings Existing Utilities and Loads The existing Stanford Hospital, LPCH, and Hoover Pavilion are currently supplied utilities from both Stanford s Central Plant (steam and chilled water) and the City of Palo Alto (power, water, sewer, storm drain, natural gas). On-site diesel generators and fuel storage system provide emergency power. Utilities provided by Stanford University s Central Energy Facility (CEF), located on the Stanford Campus at the intersection of Campus Drive and Via Ortega in unincorporated Santa Clara County are: Steam (current SUMC peak is 60,000 lb/hr, CEF capacity is 250,000 lb/hr) Chilled Water (current SUMC peak is 7,700 tons, CEF capacity is 23,000 tons) Backup Power supply from Stanford s Cogen Plant -This power can be made available by manually switching two feeders from the Stanford Cogen switchgear to the Hospitals, supplying approximately 2 MW of manual backup power in the event of loss of Palo Alto power. Utilities and services provided by Palo Alto: Power Domestic water and Fire water (Note that Stanford University currently provides fire protection water to the 1959 Main Medical Center Complex) Sanitary Sewer Natural Gas Solid Waste Disposal The existing utility loads are provided in the top half of Table 6-1. Preliminary Utility Loads for Future Structures The bottom half of Table 6-1 provides preliminary peak building demands for equipment and line sizing purposes. The total future average daily consumption loads for the SUMC are also provided in the table. Page 1 of 8

2 Revised 5/08 Domestic water and sanitary sewer data are provided as peak demand (gpm) for line sizing and average demand (gpd). The peak tons of chilled water and peak lb/hr of steam are used for line sizing and CEF production increases necessary to support the new loads. Assumptions and sources of data in Table 6-1 are provided at the end of this section. Table 6-2 provides similar information for the 2015 analysis year. Because of the phasing of projects, the new hospitals would be constructed but most of the existing buildings would not be yet torn down. FIM 1 would be constructed, and the Edwards Building would be demolished. Utilities associated with conditioning space (i.e., power, steam, chilled water) would peak in 2015, until the existing buildings were demolished and replaced with smaller, more efficient buildings. Existing Emergency Generators The following table provides a list of the existing emergency generators that support the buildings in the SUMC area. The locations are provided on Figure 6-1a. Generator number on map EGD 881, 882, 883, 884 Building served SHC and LPCH Size of generator Four 2-MW generators, with three necessary to provide power during an emergency, and the fourth available as a spare EGD 880 Falk 0.15-MW generator EGD 822 Advanced Medicine Center 1.5-MW generator MW generator EGD 812 Blake-Wilbur Clinic 0.2-MW generator EGD 885 Parking Structure MW generator EGD Welch Road 0.06-MW generator EGD 814 Grant 0.4-MW generator EGD 821 Alway, Lane, Edwards (and Fairchild, located in Santa Clara County) 0.8-MW generator EGD 810 Hoover 0.15-MW generator Future Emergency Generators The existing emergency generators at SUMC will not be of sufficient capacity to fully meet the OSHPD requirements for emergency power at the SUMC after the proposed project. At this time, it is estimated that OSHPD will require an additional 21 MW of emergency generators (ten 2-MW generators) for SHC and LPCH. Although the exact location has not been determined, it can be assumed that these additional generators would be located 1) seven generators for SHC underground between Advanced Medicine Center Page 2 of 8

3 Revised 5/08 and the proposed hospital, and 2) three generators for LPCH adjacent to the existing emergency generators near Quarry Road. In addition, each of the three proposed School of Medicine (FIMs) buildings would have an emergency generator located in two locations in proximity to the proposed buildings, with no more than two generators at any location. The existing generators serving 701 Welch and Grant would be removed (Generator EGD 821 would remain to serve Fairchild). In summary, the following generators would be added and deleted to serve the project: To be added: Location Building served Size of generator on map S1 SHC Seven 2-MW generators L1 LPCH Three 2-MW generators F1 FIM MW generator F1 or F2 FIM 2 1-MW generator F2 FIM 3 1-MW generator To be deleted: Generator Building served Size of generator number on map EGD Welch Road 0.06-MW generator EGD 814 Grant 0.4-MW generator Figure 6-1b shows the potential locations of the future emergency generators and the existing emergency generators that would remain at the end of the project. Existing Major Mechanical Equipment Major mechanical equipment in the area includes Stanford University s CEF. In addition, there is rooftop mechanical equipment on the existing hospital facilities. The approximate location of major mechanical equipment is shown on Figure 6-2a. Future Major Mechanical Equipment As a separate and independent project, Stanford University has proposed an expansion of the Central Energy Facility (CEF) to support additional campus-wide chilled water demands (i.e., Cooling Tower 5 project submitted to Santa Clara County). The increased steam and chilled water demand of the SUMC Facilities Renewal and Replacement Project would be accommodated at the Central Energy Facility. The chilled water peak demand increase of 3,400 ton-hrs/day would be accommodated by a large chiller placed in an existing building or the Cooling Tower 5 building. The steam demand increase of 60,000 lb/hour would be accommodated by replacement of existing boilers with more efficient, lower emitting, ones. This boiler replacement would be conducted under existing air Page 3 of 8

4 Revised 5/08 emission limits such that no increase in emissions over current air permit limits would occur. The new buildings will also have rooftop mechanical equipment (Figure 6-2b), similar to the existing mechanical equipment. Locations of Utility Routing Figure 6-3a shows the existing primary utility routing in the SUMC area. Figure 6-3b shows the currently anticipated routing after the project is completed. It is anticipated that any rerouting or increase in capacity will occur in existing utility corridors or roads and will not result in additional environmental impact. Page 4 of 8

5 Revised 5/08 Source/Assumption notes for Table 6-1: Stanford Utilities: all Chilled Water and Steam demand peaks and daily averages for existing load were taken from metered data Mazzetti & Associates: Existing Loads (except existing Chilled Water and Steam) and Future Loads for all buildings (except FIMs) Gayner Engineers: Future Loads for FIMs PEAK POWER DEMAND Existing peak power demand: Based upon either utility bills, or measured load metering data from Supervisory Control and Data Acquisition (SCADA) for a 6-month period in 2007, depending on what data were available. The peak demand was found by taking the highest reading during that period. New peak power demand for hospitals and clinics: Calculated by determining existing rate per square foot based upon SCADA data described above [5.56VA/sf] increased by 10% to reflect increased usage rate due to analysis of program requirements and assuming a power factor of.88 [6.11 VA/sf]. A factor of 0.88 is obtained from SCADA data. Determination of increased rate recognizes that patient rooms and hospital lighting will be more energy efficient than existing buildings. However, increases in intensive technology uses such as imaging equipment, and ventilation requirements for increased number of operating rooms, will require higher levels of power. Overall, new buildings are expected to have slightly higher rates than existing buildings despite energy-saving design attributes. New peak power demand for FIMs: Assumed 14.4 VA/sf as industry standard for academic laboratory buildings. AVERAGE POWER CONSUMPTION Existing average power consumption: Annual consumption was found using the SCADA metering data and utility bills. The SCADA data had a net kwh column for half of the year. At each 15 minute interval, the kwh measurement is taken. The average power consumption is found from the first meter reading subtracted from the last and then the result was multiplied by two to obtain the whole year. The assumption here is the first half of the year will be the same and the second. For buildings measured with utility bills, the kwh is given for each month. The annual consumption using the utility bills was the obtained by summing each month. New average power consumption for hospitals: The new average power consumption for the hospital is based on a factor of kwh/sf per day which is calculated from the existing data. New average power consumption for clinics: The new average power consumption for clinics is based on a factor of kwh/sf per day, which is based on experience of clinics that receive power from a separate distribution system that solely serves the clinical space. New average power consumption for FIMs: Total Demand Projection for all three FIM building is 5,979 KVa. Since there is no chiller involved in the building system, the largest load variation would be the HVAC motor load (VFD driven motors) and connected load Page 5 of 8

6 Revised 3/10 for lab equipment. Assuming a 0.65 factor for average power, the average daily consumption would be 0.65 x 5979 kva x 24 hours * 0.8 kw = Kwh per day. PEAK WATER DEMAND Existing peak water demand: Calculated based on building type and area. [Peak= xSFx1.05] New peak water demand for hospitals: New peak water consumption for a hospital is estimated based on building type and building size. Peak = xSFx1.05] New peak water demand for clinics: New peak water consumption for a clinic is estimated based on building type and building size. Use factor xSFx1.05] New peak water demand for FIMs: Peak water demand is calculated based on Plumbing Fixture Calculation per the Uniform Plumbing Code. Estimates of plumbing fixtures and lab equipment water usage were established based on the program square footage of the buildings. AVERAGE WATER CONSUMPTION Existing average water consumption: Except Falk and LPCH, existing average water consumption is based upon measured load data in water bills from January 2007 to April Total consumption during that 15-month billing period was divided by the number of days in period to find average daily consumption. A few buildings had higher water demands in 2008 from recent changes in occupancy and the higher water demands were used for these buildings. Existing average water consumption at Falk and LPCH was estimated based upon measured data at similar buildings at SUMC. New average water consumption for hospitals: Factors are based on Mazzetti & Associates experience with other comparable hospitals facilities. Factors take into account pre-existing water usage at the SUMC facilities. In developing these factors, Mazzetti took into account demand broken down by department and generated composite rates per square foot using Hunter s curves. Factors do not include added water conservation measures, which are described in Stanford s correspondence to the City dated February 13, 2009 and April 28, A rate of gpd/sf is used for the new SHC facilities, which is comparable to the water usage at the existing SHC facilities. A rate of gpd/sf is used for the new LPCH facilities, which is comparable to the water usage at the existing LPCH facilities. New average water consumption for clinics: Medical office buildings and clinics have a lower load density than hospitals. Used 0.1 [gal/(sf day)] for average water consumption. Factor based on Mazzetti & Associates experience with other comparable medical office and clinic buildings. Factors do not take into account added water conservation measures, which are described in Stanford s correspondence to the City dated February 13, 2009 and April 28, New average water consumption for FIMs: Average water demand was based on estimate of number of building occupants, frequency of usage of plumbing fixtures, and projected water usage for laboratory equipment (e.g., glass washing). The average water demand Page 6 of 8

7 Revised 3/10 provided in Table 6-1 includes the effect of planned conservation measures (with a targeted result of water demand 25% below similar existing campus buildings). PEAK SEWER DEMAND Existing peak sewer demand: Calculated based on 95% of peak water demand value. New peak sewer demand for hospitals and clinics: Calculated based on 95% of peak water demand value for new buildings. New peak sewer demand for FIMs: Calculated based on 95% of peak water demand value. AVERAGE SEWER CONSUMPTION Existing average sewer consumption: Calculated based on 95% of average water demand value. New average sewer consumption for hospitals and clinics: Calculated based on 95% of average water demand value for new buildings. New average sewer consumption for FIMs: Calculated based on 95% of average water demand value. PEAK CHILLED WATER DEMAND (tons of CW) Existing peak chilled water demand: Based upon a review of measured peak CW demand in tons experienced at SHC, LPCH and SoM on 5/15/08 when outdoor temperatures were approximately 95F in the afternoon. Each building has separate CW flow meters and delta temperatures which can be calculated into tons. (1 ton = 12,000 Btu/hr) New peak chilled water demand for hospitals and clinics: Factor based on Mazzetti & Associates experience with other hospitals and medical office buildings. CHW tons = 0.003xSFx(Zone Factor) The Zone Factor is assigned to distinguish between an acute care unit (i.e. Zone Factor =2, and a pharmacy (Zone Factor =0.8) for example. Areas are assigned area multipliers based on expected load density per Mazzetti experience. New peak chilled water demand for FIMs: Assume 250 sq-ft/ton for peak CW demand based on existing building peaks for similar building types (wet labs) in Northern California. AVERAGE DAILY CHILLED WATER CONSUMPTION (ton-hrs/day) Existing average daily chilled water consumption: Calculated average based upon a review of yearly measured consumption in ton-hrs used at SHC, LPCH and SoM buildings from Jan 2007 to Dec 2007 (12 months). Total metered consumption was divided by number of days (365) to calculate average daily consumption for each building. New average daily chilled water consumption for hospitals, clinics, and FIMs: The average daily CW consumption is based on the consumption of similar buildings with measured ton-hrs/sqft/yr. Wet labs (hospitals and FIM s) use 12 ton-hrs/sqft/yr. Dry labs (clinics) use 6 ton-hrs/sqft/yr. Page 7 of 8

8 Revised 3/10 PEAK STEAM DEMAND (lbs/hr steam flow) Existing peak steam demand: Based upon a review of daily measured steam flow demand in lb/hr experienced at SHC, LPCH and SoM on 1/13/08 when steam flow peaked near 7am in the morning. Each building has separate steam metering stations measuring steam velocity, pressure and temperature. New peak steam demand for hospitals and clinics: Factor based on Mazzetti & Associates experience with other hospitals and medical office buildings. Steam tons = 0.04xSFx(Zone Factor). The area multiplier is assigned to distinguish between an acute care unit (i.e., Zone Factor =1.25, and a pharmacy (Zone Factor =0.8) for example. Areas are assigned area multipliers based on expected load density per Mazzetti experience. New peak steam demand for FIMs: Assume 30 sq-ft / (lb/hr) for peak steam demand based on existing building peaks for similar type buildings (wet labs). AVERAGE DAILY STEAM CONSUMPTION (lbs/day steam usage) Existing average daily steam consumption: Calculated average based upon a review of yearly measured consumption in lbs steam used at SHC, LPCH and SoM buildings from Jan 2007 to Dec 2007 (12 months). Total metered consumption was divided by number of days (365) to calculate average daily consumption for each building. Note that this is a daily average for a complete year s usage, and that seasonal variations in steam flow are significant for building heating. Process heating (sterilization) is usually consistent though out the year New average daily steam consumption for hospitals, clinics, and FIMs: The average daily steam consumption is based on the consumption of similar buildings with measured lbs/sqft/yr. Wet labs (hospitals and FIM s) use 200 lbs/sqft/yr. Dry labs (clinics) use 50 lbs/sqft/yr Page 8 of 8

9 Revised 10/08 Table 6-1 Preliminary Utility Load Summary Table SHC, LPCH, & MOBs LOCATED IN CITY OF PALO ALTO Utility Provider Palo Alto Palo Alto Palo Alto Palo Alto Palo Alto Palo Alto Stanford Stanford Stanford Stanford Power Power Water Water Sewer Sewer Chilled Water Chilled Water Steam Steam peak avg daily peak avg daily peak avg daily peak avg daily peak avg daily BGSF demand consumption demand consumption demand consumption demand consumption demand consumption kw kwh/day gpm gallons/day gpm gallons/day ton-hrs/day tons lb/hr lb/day Existing Utility Loads SHC Core, East West, Boswell, Core Exp, HMP 1,096,300 5, , , ,000 3,200 26,000 33, , Welch 40, , , ,000 N/A N/A N/A N/A LPCH Children's Hospital 274,700 1,100 23, , , ,000 6,000 64, and 703 Welch 79, , , ,000 N/A N/A N/A N/A SHC Falk Center 52, , , , ,000 2,000 11,000 SHC Blake Wilbur Building 73, , , ,000 N/A N/A N/A N/A SHC Advanced Medicine Center 224,800 1,040 22, , , ,000 N/A N/A SoM Grant, Alway, Lane, Edwards 415,000 2,000 33, , ,000 2,800 14,000 17, ,000 SHC Hoover Pavilion 84, , , ,000 N/A N/A 2,000 12,000 Subtotals - Existing Loads 11, ,500 1, ,040 1, ,600 7,700 52,000 60, ,000 Power Power Water Water Sewer Sewer Chilled Water Chilled Water Steam Steam peak avg daily peak avg daily peak avg daily peak avg daily peak avg daily BGSF demand consumption demand consumption demand consumption demand consumption demand consumption kw kwh/day gpm gallons/day gpm gallons/day ton-hrs/day tons lb/hr lb/day New Utility Loads SHC New Stanford Hospital 1,100,000 5, , , ,000 4,000 36,000 45, ,000 SHC New SHC Clinics 429,000 2,000 18, , , ,000 14,000 59,000 SHC Demo - Core, East, West, Boswell (441,200) (2,000) (34,160) (310) (88,000) (230) (48,000) (1,400) (10,000) (15,000) (185,000) Demo Welch (40,100) (240) (1,700) (30) (8,400) (30) (8,000) N/A N/A N/A N/A Demo - Core Expansion (223,800) (1,400) (21,590) (160) (45,000) (120) (25,000) (500) (6,000) (7,000) (81,000) LPCH New LPCH Hospital 471,300 2,500 44, , ,000 1,350 15,000 18, ,000 LPCH New LPCH Clinics 50, , , , ,000 2,000 7,000 Demo and 703 Welch (79,800) (430) (5,000) (60) (10,500) (60) (10,000) N/A N/A N/A N/A SoM New Foundation in Medicine Bldg 1,2,3 415,000 4,200 74, , ,500 1,600 14,000 18, ,000 SoM Demo - Grant, Alway, Lane, Edwards (415,000) (2,000) (33,400) (300) (83,000) (220) (46,000) (2,800) (14,000) (17,000) (193,000) SHC Hoover New Medical Office Building 60, , , , ,000 2,000 8,000 Subtotals- Proposed Load Increases 9, , ,300 1, ,950 3,410 44,000 60, ,000 Total SUMC Load after Project 20, ,150 2, ,340 2, ,550 11,110 96, ,500 1,385,000 `

10 Revised 12/08 Table 6-2 Preliminary Utility Load Summary Table in 2015 snapshot scenario SUH, LPCH, & MOBs LOCATED IN CITY OF PALO ALTO Utility Provider Palo Alto Palo Alto Palo Alto Palo Alto Palo Alto Palo Alto Stanford Stanford Stanford Stanford Power Power Water Water Sewer Sewer Chilled Water Chilled Water Steam Steam peak avg daily peak avg daily peak avg daily peak avg daily peak avg daily BGSF demand consumption demand consumption demand consumption demand consumption demand consumption kw kwh/day gpm gallons/day gpm gallons/day ton-hrs/day tons lb/hr lb/day Existing Utility Loads SHC Core, East West, Boswell, Core Exp, HMP 1,096,300 5, , , ,000 3,200 26,000 33, ,000 Subtotals - Existing Loads 11, ,500 1, ,040 1, ,600 7,700 52,000 60, ,000 Power Power Water Water Sewer Sewer Chilled Water Chilled Water Steam Steam peak avg daily peak avg daily peak avg daily peak avg daily peak avg daily BGSF demand consumption demand consumption demand consumption demand consumption demand consumption kw kwh/day gpm gallons/day gpm gallons/day ton-hrs/day tons lb/hr lb/day New Utility Loads 1101 Welch 40, , , ,000 N/A N/A N/A N/A LPCH Children's Hospital 274,700 1,100 23, , , ,000 6,000 64, and 703 Welch 79, , , ,000 N/A N/A N/A N/A SHC Falk Center 52, , , , ,000 2,000 11,000 SHC Blake Wilbur Building 73, , , ,000 N/A N/A N/A N/A SHC Advanced Medicine Center 224,800 1,040 22, , , ,000 N/A N/A SoM Grant, Alway, Lane, Edwards 415,000 2,000 33, , ,000 2,800 14,000 17, ,000 SHC Hoover Pavilion 84, , , ,000 N/A N/A 2,000 12,000 SHC New Stanford Hospital 1,100,000 5, ,000 4,000 36,000 45, ,000 SHC New SHC Clinics Not built SHC Demo - Core, East, West, Boswell Not demo'd Demo Welch (40,100) (240) (1,700) N/A N/A N/A N/A Demo - Core Expansion Not demo'd LPCH New LPCH Hospital 471,300 2,500 44,300 1,350 15,000 18, ,000 LPCH New LPCH Clinics 50, , ,000 2,000 7,000 Demo and 703 Welch (79,800) (430) (5,000) N/A N/A N/A N/A SoM New Foundation in Medicine Bldg 1 * 185,000 1,890 33, ,300 8, ,150 SoM Demo - Edwards ** 66,000 (320) (5,344) (448) (2,240) (2,720) (30,880) SHC Hoover New Medical Office Building 60, , ,000 2,000 8,000 Subtotals- Proposed Load Increases 9, , , ,770 5,922 57,060 72, ,270 Total SUMC Load after Project 20, ,926 2, ,420 2, ,370 13, , ,605 1,629,270 Source/Assumption notes: * Only FIM 1 built (45% of eventual load of all three FIMs) ** Only Edwards demo'd (16% of eventual load credit from demolishing Grant, Alway, Lane, Edwards Note: Power, Chilled Water, and Steam demand is based on square footage and is therefore higher in 2015 Note: Water and Sewer additional loads based on population, and are therefore estimated to be 60% of total increase (using the same methodology as for traffic in 2015).