Geothermal heated central heating system - has return water passing through two heat exchangers separated by heat pump

摘要

In the main heating post hot water from it leaves the ground at a temperature of 75 deg.C and passes through two consecutive heat exchangers and leaves the second one at a temperature of 21 deg.C before passing through the evaporator of a heat pump circuit, and then returning to the ground. The return water from the heating system first picks up heat in one heat exchanger where its temperature rises from 5 to 20 deg.C and is heated again in the condenser of the heat pump circuit to 35 deg.C and heated in the second heat changer to 55 deg.C. This return water is then finally heated by a boiler before being returned to the secondary heating posts.