Once harnessed, warmth from the air and the ground supplies most of the heat required by a household. And the environment benefits, too: No emissions, a lower output of carbon dioxide and higher working coefficients over the year, thanks to innovative technology.
The harnessing of energy begins underground
The brine, a mixture of water and antifreeze, circulates in plastic tubes that are inserted in the ground. By means of the evaporator, the brine transfers the heat to the refrigerant circulating in the heat pump. In the evaporator, the refrigerant still has a lower temperature. Now it is heated, boils, evaporates and exits the evaporator in gaseous form. The compressor sucks up the gaseous refrigerant, compresses it at a high pressure and heats it to such an extent that its temperature is higher than that required for heating and hot water. In the liquefier, the gaseous refrigerant transfers all the heat to the water circulating in the heating system - the third cycle - by means of a heat exchanger. The heattransport medium has a lower temperature than the steam. The latter therefore condenses, and the liquefaction heat is transferred to the heat transfer medium. The liquid refrigerant now flows via the expansion valve back to the evaporator. In the expansion valve, the refrigerant now returns to its original pressure. If the refrigerant should reach the evaporator in its original state, the circuit is closed.
The harnessing of energy begins in the air
The air/water heat pump uses the ambient air as a heat source. Apart from the first step, its energy harnessing principle is the same as that of the brine/water heat pump. Here, fans direct the outside air to the evaporator of the heat pump. The air emits its heat into the refrigerant circulating in the heat pump, and the cooled air is then routed back outside. From this moment on, the two energy harnessing principles mirror one another.
The Bosch heat pump range
Bosch brine/water heat pumps are available in both a modular and a compact series: In the EHP LW/M modular series, a stainless steel hot water tank is already integrated, whereas units of the EHP LW compact series can be connected to the WST EHP external hot water tank. The Bosch air/water heat pump consists of an internal part (CC 160) and an external part (EHP AW). The external part contains the heat pump elements, among other things, the internal part the hot water tank.
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