Large (5 MBtuh+ ) heat pump application
Large (5 MBtuh+ ) heat pump application
(OP)
Is anyone aware of large scale (5 million btus/hr +) heat pumps in the US? The application in question is heating of hot water with a fairly consistent year round demand.
Gas prices in my area have doubled in the last few years and we are forecasting 20% higher ($10 / DTH) in the next year whereas electricity has been cheap and plentiful ($.037/kwhr).
On paper it appears valid (COP of 3, NH3).
Gas prices in my area have doubled in the last few years and we are forecasting 20% higher ($10 / DTH) in the next year whereas electricity has been cheap and plentiful ($.037/kwhr).
On paper it appears valid (COP of 3, NH3).





RE: Large (5 MBtuh+ ) heat pump application
Jabba
RE: Large (5 MBtuh+ ) heat pump application
Water source is possible given incoming water temperatures but most water is heated which would offset or completely negate the benefit.
RE: Large (5 MBtuh+ ) heat pump application
The Multi-Stack chiller guys in my area are beating the bushes like crazy touting the benefits of the energy recovery chillers, and pitch them as first stage heat in a situation where you can ground couple them. I think that the LWT on them is limited to about 125F though I am not SURE of that number.
Jabba
RE: Large (5 MBtuh+ ) heat pump application
RE: Large (5 MBtuh+ ) heat pump application
I think Ft Gordon, GA (or it might be Stewart) has a large closed loop system-the DOE FEMP site has a story on it.
I'm looking into the same thing for the same conditions. Looking into feasibility of domestic hot water generation during summer to reduce summer boiler load for DHW by zoning geoexchange heap pumps on a secondary loop. Generating DHW would make a good heat sink.
Mostly have air side economizers, so the chiller plant doesn't run when its cold out. Still, with a year round watr source of 55-60 F and a high COP, I'm expecting the life cycle cost to pay off.
RE: Large (5 MBtuh+ ) heat pump application
I've spoken with a compressor MFR and this looks very feasible. Much better COP than I was expecting.
RE: Large (5 MBtuh+ ) heat pump application
RE: Large (5 MBtuh+ ) heat pump application
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