R-410A HEAT PUMP FOR HEATING A CITY OF PARIS SWIMMING POOL FROM SEWER WATER

A 80 kW R-410A water/water heat pump is the key element of a system capturing heat from sewer water to heat the water of a City of Paris swimming pool.

Sewage water, being fed by sanitary and domestic uses, has a temperature of between 13 and 20 C throughout the year.

A heat exchanger - located on the bottom of sewer pipes at a distance from the heat pump and the pool – is used to heat an intermediate water loop, serving as the cold side of the R-410A heat pump. The warm side water at 37 C is sent to the swimming pool heating system, in order to feed the showers and maintain the swimming pool water at a temperature of 26 C. These temperatures allow the heat pump a COP higher than 4.

Source: GC  - Génie Ckimatique Magazine (FR)