How the heat pump works?
The source of heat can be water from a drilling, air, ground.
The coolant – the liquid in the outer circuit – is being heated with few degrees, taking away heat from the certain source. Inside the heat pump the coolant passes through a heat exchanger (evaporator) and gives away the collected heat to heat pump’s inner circuit. The inner circuit is filled with refrigerant – Freon, which has low boiling temperature. When the Freon crosses the evaporator, it passes into gaseous state at low temperature and pressure.The gaseous Freon goes from the evaporator to the compressor where it compresses.
The gas pressure and temperatures are raising to preset values. Then the hot gas goes to second heat exchanger – condenser. There happens heat transfer between hot gas and coolant – usually water – in the internal building thermal installation. When the Freon gives heat to the internal installation, it cools and passes into liquidity state. However the gas pressure is still high. In its passage through the control valve its pressure drops and the refrigerant begins to evaporate. After the control valve is the evaporator, where the Freon keeps evaporating to its passage into gaseous and the whole cycle is repeated again and again in “heating” regime of heat pump.
On this principle operate air conditioners, heat pumps, refrigerators. It is known as “reverse Cannot cycle”
In “cooling” regime with the help of a built-in four-way valve, the functions of two heat exchangers – evaporator and condenser – exchange. This way the heat pump takes heat from the internal installation and gives it to the liquid in the outer circle.
