We have a water to air heat pump with open loop [pump and dump]. What info is needed to calculate its coefficent of performance and how is the calculation made?
We initially were looking at dunking a "Slim Jim" plate type heat exchanger in a clarifier, but things got real expensive real fast. A spiral hx [for sewage/coolant exchange] was available was available for ~$800 but was dispensed with as unnecessasary since our effluent is not corrosive.
BTW..On the advice of the provider of the Water Furnace, we have no heat exchanger. We did install a 50 mesh y-strainer on the effluent supply line. Uses ~12 gpm. Pump and dump. Coldest the eff. ever gets is ~ 9C. The plant is 2 mgd avg. Dead of winter, flow drops to 1.3 mgd. Coldest air...
I am the Executive Director at the Washington County Wastewater Treatment Plant in Ft Edward, NY. We just started up a treated effluent powered heat pump [Water Furnace, 6 Ton capacity] on November 4, 2008, to heat our new 2000 sq ft maintenance building. Seems to be working great. We will be...
