How Heat Pumps Work


A heat pump can be a very effective way to use the power of renewable energy to add heat to water. It can save you a lot of money on your hot water bills, as it uses only about one third of the energy of an electric water heater. This can save you massive amounts of money on your hot water bills over the long term and no roof space or panels are needed.

So how does it work? A heat pump functions somewhat like a refrigerator - but in reverse. It takes the heat from the ambient air outside the unit and transfers it to the water that is stored within the heater itself, through a heat exchange system. The amazing thing is that a heat pump will still work for you in very cold conditions - even when the temperature outside is below zero.


What You Need to Know About R134


The heat pump draws in external air via a fan into an evaporator which contains a special type of refrigerant; it is called R134 and it is not a CFC, so it will not damage the ozone layer. This substance has a boiling point of -26 Celsius, whereas water’s boiling point is 100C. Even if the temperature is very low, it is still warm enough to make the R134 “boil”.

This will turn the R134 into a gas, which flows through the piping of the heat pump. Then, a compressor pumps the gaseous refrigerant through a valve, which compresses the gas. This process creates a significant amount of heat.

Then, a heat exchanger will transfer the heat from the gas pipes and send it to a tank of stored water. The R134 has become cold again as the heat is drawn away, so it returns to the beginning of the cycle and the full process begins again.


An Environmentally Friendly Solution


This type of heating system is also very environmentally friendly, as it reduces greenhouse gas emissions due to lower energy requirements. To learn more about heat pumps and how they can work for your home, please feel free to contact Australian Hot Water Eastwood at any time. We are your trusted hot water specialists in Sydney’s North West suburbs.