Low Temper erature H e Heat Pump mps Rocky Mountain Utility Exchange September 24-26, 2019 Jon Beyer, Tri-State G&T Gary Myers, Tri-State G&T www.peakload.org
Ove verview • Program Purpose/Goal: • To demonstrate and verify energy efficiency of low temp air source heat pump in lower ambient temperatures. • To show heat pumps can compete with the operating cost of conventional propane and natural gas units. • Participants: • EPRI – as research entity • Tri-State – as conduit for member system participation • Member Homes – as “real-world” application sites www.peakload.org
Equ quipment & & Si Site Sel e Selec ection • Equipment • Options were researched and advantages compared • Why Carrier? • Operational and application flexibility • Site Selection • An application process – open to member systems/member owners. • Variety was desired: • Fuel – replacing propane, natural gas, older heat-pump technology, etc. • Climate – mountains, plains, etc. • Structural – ranch, tri-level, slab on grade, etc. • Five sites were chosen based on real-world applications and challenges. www.peakload.org
Installation Si Site D e Details Tri-State G&T Site Number 1 2 3 4 5 Location Sidney NE Dalton NE Cortez CO Socorro NM Bayfield CO Single story Single story Single story Single story Home with with on slab with on crawl space Tri-level Description conditioned conditioned attached with attached basement basement garage garage Number of Conditioned 2 2 3 1 1 Floors Conditioned 2875 3356 1816 1160 2550 Floor Area (sf) www.peakload.org
Installation E n Equipm pment De Details Tri-State G&T Site Number 1 2 3 4 5 Location Sidney NE Dalton NE Cortez CO Socorro NM Bayfield CO 3.5-ton heat 3.5-ton heat Evaporative 3-ton a/c 4-ton a/c Old HVAC pump w/ pump w/ rooftop cooler w/93% efficient w/93% efficient System electric strip electric strip w/80% natural propane furnace propane furnace heat heat gas furnace Carrier Carrier Carrier Carrier Carrier Heat Pump (HP) (Infinity 20 w/ (Infinity 20 w/ (Infinity 20 w/ (Infinity 20 w/ (Infinity 20 w/ Manufacturer Greenspeed) Greenspeed) Greenspeed) Greenspeed) Greenspeed) Nominal HP Size 3 3 4 2 3 (tons) www.peakload.org
EPRI RI L Low Tem emp H Hea eat Pump D Data Ca Captur ure 1 e 1/21/19 www.peakload.org
Appl plication – Sidne ney N NE www.peakload.org
Res esul ults – Sidne ney N NE Site #1 - Sidney (Lindahl) $628 $417 $68 $100 HEATING COST /DEC-APR COOLING COST/MAY-JUL Low Temp HP Propane Furnace Stat Setting: 68 ⁰ F /65 ⁰ F Stat Setting: 74 ⁰ F /73 ⁰ F 2019 Avg Temp Feb 20.6 ⁰ F 2018 Avg Feb Temp 25.3 ⁰ F 2019 Avg Jul Temp 72.9 ⁰ F 2018 Avg Jul Temp 73.8 ⁰ F www.peakload.org
Succes Success i is E Evi vident… Comments from homeowner and CEO of Wheatbelt Public Power District, Tim Lindahl: “In addition to the savings, the comfort has been a double improvement, both in the winter and summer…” www.peakload.org
Questions? www.peakload.org
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