Site Evaluation for Oregon School for the Deaf 999 Locust Street Northeast Salem, OR 97301-0999 BE15178 Sponsored by: Energy Trust of Oregon Existing Buildings Program Submitted by: ATAC Contact Information Report Date (11/9/2011) SWE Project # K023.02 Total Possible kwh Savings Identified: $4,106 Total Possible Therms Savings Identified: $46,830 List major systems where energy efficiency measures are recommended: Central Steam Distribution System, Domestic Water Heating Systems. K023.02-1
CONTACTS Site Contact The following facility personnel assisted with this report: Bill Selnes, Maintenance/Custodial Supervisor: 999 Locust Street Northeast Salem, OR 97301-0999 Phone: (503) 378-3863 ex. 2-2323 Cell: (503)991-1313 Email: bill.selnes@state.or.us Energy Trust Contact The Program Management Contractor (PMC) is: Lockheed Martin, Inc. 621 SW Morrison St. Suite 550 Portland, OR 97205 Phone; (503) 243-7377 Attn: Ms. August Nord ATAC Contact Information The Allied Technical Assistance Contractor (ATAC) that prepared this report is: Gregory Langdon, PE Systems West Engineers 411 High Street Eugene, Oregon 97401 Phone: (541) 342-7210 Fax: (541) 342-7210 DISCLAIMER In no event will Energy Trust of Oregon or (ATAC/company) be liable for (i) the failure of the customer to achieve the estimated energy savings or any other estimated benefits included herein, or (ii) for any damages to customer's site, including but not limited to any incidental or consequential damages of any kind, in connection with this report or the installation of any identified energy efficiency measures. K023.02-2
SITE DESCRIPTION Facility Overview The Oregon School for the Deaf is located in Salem, Oregon and consists of 19 buildings having a total floor area of 270,000 square feet. Buildings were constructed between 1930 and 2010. A campus map and list of buildings including floor area is attached at the end of this report. The primary focus of this site evaluation is to access the feasibility of replacing the existing central steam plant with new heating systems that use condensing natural gas boilers. Accordingly, this facility overview will focus on systems related to the central steam plant conversion. Central Steam Plant: The plant produces 40 psi steam for distribution to 13 buildings for space heating, domestic water heating, and pool water heating. Two natural gas boilers produce steam. Boiler #1: Kewanee built-up firebox boiler was installed in approximately 1950. The boiler is equipped with a forced draft dual fuel burner installed in the ash pit, which fires natural gas as the primary fuel and number 2 fuel oil as back-up. It is estimated that the existing boiler operates with a combustion efficiency of 82%. The boiler is nearing the end of its useful life. Boiler #2: Hurst scotch marine boiler was installed in 1997. The boiler is equipped with a forced draft dual fuel burner, which fires natural gas as the primary fuel and number 2 fuel oil as back-up. It is estimated that the existing boiler operates with a combustion efficiency of between 82% and 83%. The boiler is reported to be inefficient and in poor condition BOILER 1 BOILER 2 Feedwater Deaerator: Condensate return is treated in a feedwater deaerator that removes oxygen and heats feedwater to 230 o F. Controls: Plant equipment is controlled by packaged control systems and from the campus Automated Logic building automation system. The plant is disables during summer months, and operates K023.02-3
continuously during a majority of the school year. The plant is disabled some weekends during periods of warmer weather in the fall and spring. Distribution System: Steam and low pressure condensate return piping is distributed to campus buildings. A majority of the distribution piping is located in below grade utility tunnels. The piping is generally well insulated and in reasonably good condition. Some sections are routed through buildings or direct buried below grade. Building Heating Systems: Various heating systems use central plant steam. building heating systems and equipment. Hokanson: Six steam convectors provide space heating. Ulmer: A steam convertor provides hydronic heating water for space heating. Following is a summary of Peck Gym: Steam is provided to four heating and ventilating units for the gymnasium, two heating and ventilating units for the locker rooms, and one unit heater for the pool natatorium for space heating. Steam is also provided for domestic hot water heating and pool water heating. Paint Shop: Steam is provided to radiators for space heating. Kuenzi Hall: Steam is provided to convectors for space heating Lindstrom Hall: A steam convertor provides hydronic heating water for space heating. Steam is also provided for domestic hot water heating. Wallace Hall: A steam convertor provides hydronic heating water for space heating. Clatterbuck: A steam convertor provides hydronic heating water for space heating. Steam is also provided for domestic hot water heating and kitchen process use. Maintenance: Steam is provided to convectors and unit heaters for space heating. Smith/Wynkoop: A steam convertor provides hydronic heating water for space heating. K023.02-4
TABLE 1 ENERGY CONSUMPTION HISTORY Electric Use(kWh) (1) Natural Gas Use(Therm) (1) 2008-2009 2009-2010 2010-2011 Average 2008-2009 2009-2010 2010-2011 Average Jul 90,980 83,000 82,080 85,353 0 0 1 0 Aug 99,720 108,600 105,080 104,467 2,107 590 110 936 Sep 125,800 115,060 108,860 116,573 7,115 3,658 4,026 4,933 Oct 122,000 119,540 107,540 116,360 14,218 15,526 13,766 14,503 Nov 114,560 120,080 115,400 116,680 17,005 17,910 22,473 19,129 Dec 123,960 133,200 135,880 131,013 0 22,378 26,056 16,145 Jan 155,840 118,540 131,760 135,380 27,366 22,708 23,437 24,504 Feb 137,600 123,480 121,280 127,453 19,688 18,432 22,347 20,156 Mar 117,060 112,480 107,140 112,227 18,222 19,367 19,590 19,060 Apr 107,520 105,020 105,620 106,053 14,119 17,000 16,834 15,984 May 112,640 121,040 107,820 113,833 10,312 13,924 11,520 11,919 Jun 104,620 99,780 103,880 102,760 2,170 3,902 2,709 2,927 TOTAL 1,412,300 1,359,820 1,332,340 1,368,153 132,322 155,395 162,869 150,195 TOTAL ENERGY USE (KBTU/YR) 19,689,041 ENERGY USE INDEX(KBTU/SF/YR) 72.6 NOTES: (1) Electrical consumption includes all campus buildings. (2) Natural gas use is for boiler plant fuel only. PROPOSED ENERGY EFFICIENCY MEASURES Base Cost A conventional basic upgrade for the central steam plant is to replace the existing steam boilers with new Code compliant steam boilers that are similar to the existing boilers. Code requires that new boilers have a minimum combustion efficiency be 82%. The existing boilers presently meet this minimum efficiency requirement. Work would include: Remove existing boilers, burners, breeching and flues including asbestos abatement. Provide two new 200 hp high pressure steam boilers. Provide related upgrades including electrical, steam, feedwater piping, and fuel piping connections, new flue gas systems, and new automatic control systems. Provide structural upgrades for equipment, piping, and flue gas systems. EEM 1 - High Efficiency Condensing Hot Water Boiler Plant Replace existing steam boilers with new boiler equipment and hot water piping distribution system. The plant upgrade will include the following elements: K023.02-5
Central Hot Water Boiler Plant: A hot water central boiler plant will be installed along with hot water distribution piping to provide heating water to a majority of buildings currently served by the central steam plant. o Remove existing boilers, burners, breeching and flues including asbestos abatement. Remove sections for steam and condensate distribution piping and equipment not intended for reuse. o Three new 2.0 mbh condensing natural gas boilers. o Related upgrades including primary hot water piping and circulation pumps, new combustion air and flue gas systems, electrical connections, fuel piping connections, and new automatic control systems. o Structural upgrades for equipment, piping, and flue gas systems. o Two secondary hot water distribution pumps located in the boiler plant o o Hot water distribution piping. Hot water piping connections to the following existing building systems: Ulmer: Connect to existing hydronic heating water system. Peck Gym: Replace steam heating coils, unit heater, and pool water heat exchanger and provide hot water heating equipment. Lindstrom Hall: Connect to existing hydronic heating water system. Clatterbuck: Connect to existing hydronic heating water system. Maintenance: Replace steam convectors and unit heaters with hot water heating equipment. Smith/Wynkoop: Connect to existing hydronic heating water system. Central Plant Steam Boiler: Kuenzi Hall, Hokanson, and the paint shop have existing steam heating systems that would not be cost effective to convert to hot water at this time. A single low pressure steam boiler will be installed to provide steam to these buildings. Work will include: o o 30 hp cast iron sectional low pressure steam boiler. Related upgrades including steam and condensate piping connections, new combustion air and flue gas systems, electrical connections, fuel piping connections, and new automatic control systems. Local Hot Water Boiler Plant: A local hot water boiler will be provided for Wallace Hall. A local boiler is more suitable for this site due to its remote location and the cost of replacing buried distribution piping. Work will include: o One local condensing natural gas boiler. o Related upgrades including primary water piping and circulation pumps, new combustion air and flue gas systems, electrical connections, fuel piping connections, and new automatic control systems. o Hot water piping connections to the existing building hydronic system: EEM 2 - High Efficiency Condensing Domestic Hot Heaters Replace existing steam domestic water heater in Linstrom Hall, Peck Gym, and Smith/Wynkoop. New heaters would be condensing natural gas fired units. The major advantage of providing local domestic water heaters is that hot water can be provided during periods of warmer weather without having the central boiler plant in operation. K023.02-6
PROPOSED ENERGY EFFICIENCY MEASURES MENU TABLE 2 ENERGY CONSUMPTION HISTORY Electric Use(kWh) (1) Natural Gas Use(Therm) (1) Base Cost EEM Description N/A Projected kwh savings (kwh) Projected therm savings (therms) - - Budgetary install incremental cost ($) Projected Energy Trust incentive* ($) $ 640,000 $ - Budgetary gross payback (years) Budgetary net payback with incentive* (years) - - Estimated cost to study further ($) Nonenergy benefits ($) Notes - - High Efficiency EEM 1 Boiler Plant 4,106 46,213 $ 585,000 $ 47,240 12.45 yrs 11.45 yrs $ 12,000 $ 2,000 (1) High Efficiency EEM 2 Dom Wtr Htrs - 617 $ 7,250 $ 617 11.64 yrs 10.65 yrs $ 500 $ - NOTES: (1) Non-Energy Benefits are for reduced chemical treatment costs. K023.02-7
PRIORITY RECOMMENDATION Both measures should be implemented simultaneously. NEXT STEPS FOR PARTICIPANTS Review the energy-efficiency measures suggested within this site evaluation. After you have made a decision on which measure(s) you would like to implement, speak with your program representative before starting installation. K023.02-8
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