A description of at least three initial energy management opportunities and an estimate of cost, energy savings, cost savings, and payback. Examples: LED lighting upgrade, HVAC upgrade, motor upgrade,
Final Assignment BUSI 3523 – Energy Systems Operations Case #1 – Yorkville Care Centre Building Description The Yorkville Care Centre is a single-storey, assisted living health care facility with 213 beds in Kelowna, British Columbia. The footprint of the entire facility measures approximately 14,400 m2 (155,000 ft2). The facility consists of patient care spaces, amenities, and support and utility areas. The building also houses the gerontology centre, providing further support to permanent or temporary patients. The building occupancy schedule is as follows: Monday to Friday Saturday Sunday Residences 24 hours 24 hours 24 hours Offices 8:00 – 16:30 8:00 – 16:30 Closed Kitchen 5:00 – 20:00 5:00 – 20:00 5:00 – 20:00 Natural gas and electricity is supplied by a local utility – no energy is generated onsite. The bills are attached in a spreadsheet. An energy study determined the building energy breakdown as follows: Electricity Consumption per Year (2,017,571 in 2016) Lighting: 557,400 kWh/y Space Cooling: 235,841 kWh/y Plug Loads (Computers, Other Equipment): 268,628 kWh/y Pumps: 210,010 kWh/y Ventilation Fans: 893,479 kWh/y Space Heating: 0 kWh/y Natural Gas Consumption per Year (15,500 GJ/y in 2016) Space heating (Boilers and Rooftop Units): 12,447 GJ/y Domestic Hot Water: 2453 GJ/y Other (Kitchen and Laundry): 600 GJ/y A basic description of the facility is presented below: Building Envelope Typical masonry brick with concrete slab in good condition – Good condition Windows are single pane metal frame – Poor condition Roof is asphaltic 2 ply SBS one layer overlay board with isocyanurate insulation – Good condition Lighting Interior lighting Standard 2 x 4’ 17W T8 Lamp Fixtures Wall sconces – 24W CFL Exterior lighting – 100W HPS fixtures Parking lighting – 150W metal halide fixtures Boilers Water heating for the building is provided by four Cleaver Brooks natural gas fired draft boilers. These were installed in 1977 and 1985. All boilers are fire tube and at end-of-life. 2 x 6,277 MBH Input Rated Capacity, 80% efficiency in poor condition 2 x 2,930 MBH Input Rated Capacity, 80% efficiency in poor condition Space Cooling One 200-tonne Trane air cooled R-series unit installed in 2013 that supplied chiller water in good condition 5 x 18 tonne roof top units in good condition Some minor additional air conditioning Ventilation 51 exhaust fans (EFs) in good condition 31 central air handling units (AHUs) in good condition Very poor controls using old pneumatic actuators for controls No demand controlled ventilation No centralized controls or building management system Domestic Hot Water 2 x 750 MBH Input Rated Capacity, 85% in good condition installed in 2013 Pumps All pumps are constant speed ranging from 0.5 to 10 hp Other End Uses There is a commercial laundry facility on site There is a commercial kitchen that has a series of old equipment at end of life: 2 commercial refrigerators from 1989 2 natural gas convection ovens 1 natural gas fryer 1 natural gas griddle 2 commercial natural gas dishwasher There is an office with a variety of IT plug loads like computers Energy and Facilities Management The facility has one full time, on-site operator in charge of maintenance Your organization has one mechanical and electrical engineer that can assist with projects but that’s located in a central office away from the care facility There has never been any energy efficiency work done at the facility There is no Energy Management Plan There are no behavioral energy management initiatives Your organization has never looked at energy management. You are their first employee dedicated to energy management. There is no building management system. Occupant Concerns The building has many cold spots in winter and warm parts in summer. The building heat and cooling is left on overnight The lighting in the building is very poor with various different colour lights and many burnt-out fluorescent tubes The windows are drafty and give the patients chills An energy assessment was done at the site in 2018, and came up with the following 24 recommendation: ECM Description System Natural Gas Savings (GJ/yr) Electricity Demand Savings (kW) Electricity Energy Savings (kWh/yr) Natural Gas Savings ($/yr) Electricity Savings ($/yr) Total Savings Inc. Avoided O&M ($/yr) Implementation Cost ECM 1 Boilers Hot Water Supply Temperature Reset Boilers 586 – – 5,185 – 5,185 12,657 ECM 2 Chiller Water Supply Temperature Reset Chiller – 13 26,169 – 3,026 3,026 7,100 ECM 3 Domestic Hot Water Pumps Shutdown Pumps – 0.8 2,628 – 251 251 5,314 ECM 4 (4) LED Upgrade of Existing Interior T8 and Exterior Metal Halide and High Pressure Sodium Lighting Lighting 59 354,600 30,087 42,147 145,136 ECM 5 Shut Down during 21:00-5:00 (8 h)& Reduced Airflow During Day AHU-3 and EF-3 1,159 87,929 10,261 8,289 19,379 19,129 ECM 6 Night Setback (18 C vs. 22 C), Setup (24 C vs. 22 C), DCV (zero OA with CO2 sensor) and VFD: during 22:00-5:00 (7 h) AHU-4 and EF-2 97 10 25,095 856 2,778 3,911 10,714 ECM 7 Night Setback (18 C vs. 22 C), Setup (24 C vs. 22 C), DCV (zero OA with CO2 sensor) and VFD: during 22:00-5:00 (7 h) AHU-5 and EF-4 27 7,454 241 823 1,147 7,766 ECM 8 Low Occupancy HVAC Shut Down during 21:00-5:00 (8 h) AHU-20 and FE-11 190 14,293 1,684 1,300 3,114 3,498 ECM 9 Low Occupancy HVAC System Shut Down during 21:00-5:00 (8 h) AHU-21 and FE-17 297 6,159 2,626 600 3,286 3,498 ECM 10 Low Occupancy HVAC Shut Down during 18:00-5:00 (11 h) RTU-BAL (F-10) 414 7,027 3,668 1,039 4,810 3,498 ECM 11 Low Occupancy HVAC Shut Down during 18:00-5:00 (11 h) F-25 and P-24/25 83 9,891 738 874 1,700 3,498 ECM 12 Variable Frequency Drives for Pumps 1 & 2 Pumps – 43,020 – 3,549 3,904 16,808 ECM 13 Variable Frequency Drives for Pumps 3 & 4 Pumps – 32,160 – 2,653 2,919 15,708 ECM 14 Variable Frequency Drives for Pumps 5 & 6 Pumps – 10,468 – 887 975 15,048 ECM 15 Variable Frequency Drives for Pumps P1 Pumps – 13,116 – 1,082 1,190 7,722 ECM 16 Night Setback (18 C vs. 22 C), Setup (24 C vs. 22 C), Add Demand Control Ventilation during 22:00-5:00 (7 h) AHU-1 20 10,184 180 1,104 1,394 8,096 ECM 17 Night Setback (18 C vs. 22 C), Setup (24 C vs. 22 C), Add Demand Control Ventilation during 22:00-5:00 (7 h) AHU-2 32 9,193 287 1,014 1,403 7,986 ECM 18 Shut Down during 18:00-5:00 (11 h) AHU-3 and FE-1 140 12,249 1,243 1,102 2,456 3,498 ECM 19 Night Setback (18 C vs. 22 C), Setup (24 C vs. 22 C), Add Demand Control Ventilation during 22:00-5:00 (7 h) AHU-4 23 10,185 199 1,107 1,416 7,986 ECM 20 Night Setback (18 C vs. 22 C), Setup (24 C vs. 22 C), DCV (zero OA with CO2 sensor) and VFD: during 22:00-5:00 (7 h) AHU-5 15 5,962 134 650 849 7,766 ECM 21 Low Occupancy HVAC Shut Down during 21:00-5:00 (8 h) AHU-6 and FE-9 137 4,685 1,214 454 1,713 3,498 ECM 22 Low Occupancy HVAC Shut Down during 19:00-5:00 (10 h) AHU-22 52 2,231 464 291 784 3,498 ECM 23 Door Weather Stripping and Air Sealing Doors 105 – – 927 – 927 3,401 ECM 24 Heat Elements Insulation Pipes, Valves 433 – – 3,831 – 3,831 10,356 The energy assessment did not provide recommendations for large capital equipment (boilers, kitchen equipment, water heaters, etc) that were at the end of life. The recommendation is to replace those units at their end-of-life with the highest efficiency models.