Heating with thermal pump
Water, as well as air and soil, are inexhaustible sources of energy, which, combined with the modern technology of heat pumps, allow the extraction of heat for heating and cooling of residential, administrative and office buildings.
This makes them a reliable and environmentally friendly solution for quality of life.
Thermal pumps as a device and operation are refrigerator systems. The difference is that they operate at a higher temperature level and being used both for cooling and heating.
And efficiency is higher when the temperature difference is smaller. The conclusion is that thermal pumps are more effective when ΔT (temperature difference is small).
Air conditioners are heat pumps air-air. A major disadvantage is that by lowering the external temperature decreases their efficiency.
Example: When outdoor temperature is -10 ° C temperature vaporization of refrigerant in the air-conditioner is -20 ° C, i.e. in Kelvins is Ti = 273.15-20 = 253,15K and temperature of condensation must be (+ 50 SPO ° to + 65 ° C) i.e. in Kelvins is Ti = 57 + 273.15 = 330.15 K
ΔT = 77, and efficiency η = 0.5
μ = 330,15.0,50 / 77 =2,14.
Heating factor indicates how much heat you get with a unit energy input. For the example above, with a cost 1kW are obtained 2.14kW.
When the soil or ground water are used as a source of heat, whose temperature is about 12- 13 ° C effectiveness is as follows: Ti= 6-8 ° C, Tk = 55 ° C, and in Kelvins Tk = 328.15K, the temperature difference ΔT is = 47 °C, the efficiency factor for this difference is η = 0.65
EER (Energy Efficiency Ratio) (μ) = 328.15 * 0,65 / 47 = 4.54 i.e. with 1kW we get 4.54kW
Moreover, outside air temperature has no influence on the EER