Air To Water Heat Pump Cop

The efficiency of air source heat pumps is measured by the coefficient of performance cop.

Air to water heat pump cop.

A high cop over 1 0 means your heat pump is performing very efficiently and your heating bills will be low. Both heat pumps were assumed to supply heat to an energy efficient house in a cold upstate ny climate of 6720 heat degree days. I recently ran an analysis of two heat pumps. An air to water heat pumps system consist of four major elements that allow the refrigerant to pass from the liquid state to the gas.

Cop or coefficient of performance is the most basic energy efficiency metric of any heat engine. The efficiency of an air to water heat pump is most optimal at 7 c as opposed to dry and cold locations where outside temperatures fall below 20 c. By definition cop is the ratio of how much useful heat or cold an hvac device will produce if we give it certain energy input. Keeping the working principles of an air to water heat pump in mind the decline in temperatures will affect the operating efficiency.

Geothermal heat pump efficiency is traditionally measured using a ratio called coefficient of performance cop. A cop of 3 means the heat pump produces 3 units of heat energy for every 1 unit of electricity it consumes. The cop varies according to the external temperature becoming less efficient when the weather is really cold. The report will show the projected performance capacity cop seasonal average cop cop by hours and by temperature a backup heat analysis and more.

A compressor a condenser an expansion valve and an evaporator. Typically air to water heat pumps have a cop of around 3 which means they generate three units of heat for each unit of electricity used. How does an air to water heat pump work. In very mild weather the cop of an air.

This type of heat pump works best in moderate climates. However air source heat pumps do perform strongly all year round and have proven popular in. Within temperature ranges of 3 c to 10 c the cop for many machines is fairly stable at 3 3 5. It s very useful when comparing heat pumps fridges and air conditioners.

A heat pump is a device that transfers heat energy from a source of heat to what is called a thermal reservoir heat pumps move thermal energy in the opposite direction of spontaneous heat transfer by absorbing heat from a cold space and releasing it to a warmer one a heat pump uses external power to accomplish the work of transferring energy from the heat source to the heat sink. A geothermal heat pump with an assumed seasonal average cop of 4 0 and a cold climate air to water heat pump with a seasonal average cop of 2 5. This report is powered by ashrae weather data viewer 6 0 under license between ashrae and chiltrix inc. For example if a heat pump has a cop of 5 the pump can produce 5 units of heat for every watt of power used.

A fan passes air over the evaporator the refrigerant absorbs heat from the outside air.