Heat Pump Hydronic Heating
Heat Pumps are quickly replacing gas boilers as the preferred hot water heating method in Australia, offering increased efficiency, especially when coupled with a solar PV system. Hydronic heat pumps are effectively used in climates where temperatures fall below 15 degrees Celsius and operate very effictively in the mild Australian winters. Quality heat pumps have a coefficient of performance (CoP) of between 3.6 and 4.5. The CoP of a heat pump, is a ratio of useful heating, for example, a heat pump with a CoP of 4.5, will generate 4.5kW of hot water from every 1kW of input power.
How does and Air to Water Heat Pump Work?
Air source to water heat pumps, use electricity to energize refrigerant which absorbs warmth from external air and turns it into heat to warm your home. Heat pumps can effectively heat water to over 75 degrees Celsius, however, to maintain a high CoP, many heat pumps use refrigerant which allows water to be heated to around 60 degrees Celsius. The refrigerant within the heat pump is circulated in a closed couple cycle, conducting heat to a thermal buffer tank, which is then pumped around the hydronic circuit of the home.
The Life Span of a Heat Pump
In a hydronic heating system, the heat pump will play the most significant roll, so it is important that you invest in a quality unit. A heat pump should be serviced annually to keep ventilation ducts open and free from debris. A major service is required from a refrigeration technician every 5 – 10 years for general maintenance and re gassing. Replacement parts are available your heat pump has a long operating lifetime. A quality heat pump, if regularly serviced, should last over 25 years.
Ground Source Heat Pumps (Water to Water)
Ground Source Heat Pump use pipes buried underground to heat radiators, underfloor or warm air heating systems and hot water in your home. The Ground Source Heat Pump has water circulating in its pipe buried under ground. The fluid inside the pipe absorbs the heat and passes through the heat exchanger into the heat pump. The ground having a constant temperature so the ground source heat pump could be used throughout the year.