HEAT PUMP WATER HEATER
It's generally easier to move something than to make something. Putting that principle to use, heat pump water heater (HPWH) technology uses electricity to move heatfrom one place to another instead of generating heat directly.
To understand the concept of heat pumps, imagine a refrigerator working in reverse. While a refrigerator removes heat from an enclosed box and expels that heat to the surrounding air, a HPWH takes the heat from surrounding air and transfers it to water in an enclosed tank. Therefore, they can be two to three times more energy efficient than conventional electric resistance water heaters. A low-pressure liquid refrigerant is vaporized in the heat pump's evaporator and passed into the compressor. As the pressure of the refrigerant increases, so does its temperature. The heated refrigerant runs through a condenser coil within the storage tank, transferring heat to the water stored there. As the refrigerant delivers its heat to the water, it cools and condenses, and then passes through an expansion valve where the pressure is reduced and the cycle starts over.
SPLIT & ALL IN ONE HEAT PUMP WATER HEATER
While a refrigerator pulls heat from inside a box and dumps it into the surrounding room, a stand-alone air-source heat pump water heater pulls heat from the surrounding air and dumps it—at a higher temperature—into a tank to heat water to approx. 55 degrees Celsius, whereby producing cool rest air at a temperature of 10-12 degrees Celsius, equal to an air con unit.
This solution is therefore so perfect as it beats initial investment cost compared to single unit heating elements (e.g. cost for heaters, cables, 300KVA power requirement), but also operational cost.
The split heat pump water heater comes, as the name says, in a set, with separate storage tank.
The all in one heat pump water heater has the storage tank integrated.
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AIR SOURCE ALL IN ONE HEAT PUMP WATER HEATER
The all-in-one heat pump functions in the same principles as the common heat pump, however, it comes as an integrated unit with a built-in water storage tank. The stand-alone all-in-one solution is ideal for apartments that require larger amount of hot water.
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SWIMMING POOL HEAT PUMP WATER HEATER
How does a swimming pool heat pump work?
The evaporator absorbs heat from the ambient air drawn through the evaporator coil by the fan (1a). The heat is transferred to the cold refrigerant flowing through the evaporator coil and the residual cooler air generated by the process is then discharged out of the heat pump by the fan (1b).
The compressor then receives the warmed refrigerant and by the compression action, heats it, elevating substantially the pressure inside the system. The now hot refrigerant converted to gas is then pumped to the condenser.
The heat from the hot refrigerant flowing inside the condenser is then transferred to the pool water, touching the exterior of the condenser coil, when flowing through the heat exchanger. In the process, the refrigerant temperature drops and the water temperature increases.
The now warm refrigerant flows through the pressure control regulator device (capillaries or expansion valve) greatly reducing the pressure inside the system and chilling the refrigerant to a cool state again. The refrigerant is then ready to restart the process and flow into the evaporator coil to collect the heat again.
A swimming pool heat pump only requires energy to operate a compressor and a fan motor, requiring minimum power consumption in the process. Heat pumps can produce more heat energy than the electrical power it consumes.
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