Depending on the ambient temperature the heat pump saves an average of 75% of the hot water bill. The conventional 150 liter geyser uses 3000 Watt to heat the water and the 250 liter geyser uses 4000 Watt. The heat pump situated outside the house uses 530 Watt to heat 300 liters of water. Indoor heat pumps use 440Watt. Note: The heat pump automatically regulates the temperature. When the heat pump has heated the water to temperature to the desired temperature, the heat pump will switch itself off.
What is a solar Heat Pump?
The application of heat pumps can be found from pool water heating, domestic and commercial hot water heating applications. The heat pump in question is used for domestic hot water heating and consists of a hot water cylinder and a heat pump.
See Diagram:
1. Heat pump compressor
2. Thermostat to regulate the temperature
3. Evaporator to collect the heat from the ambient air
4. Expansion valve
5. 300L hot water cylinder
6. Sterilisation element to kill unwanted bacteria
7. Solar heat exchanger to connect solar panel (Not required – Customers option)
8. Copper jacket to transfer the heat into the water.
Note: The heat pump completely replaces the hot water geyser.
Does the heat pump require sunlight?
The heat pump works in rain, sun or at night. At night the earth radiates the heat back into the atmosphere. As long at the air is above 0°C the heat pump can extract heat from the air.
