Heat pump technology is a clean energy technology in the 21st century, with its main advantages being environmental protection and energy conservation. Geothermal heat pump and air source heat pump are two application types of heat pump technology. What are the differences between air source heat pump and geothermal heat pump? Today, the editor will provide a detailed analysis for everyone.
Geothermal heat pump is a heating and air conditioning system that uses ground soil, groundwater or surface water as heat source. According to the different forms of geothermal energy exchange systems, geothermal heat pump systems can be divided into buried pipe geothermal heat pump systems, ground water geothermal heat pump systems and surface water ground source heat pump systems.
Air source heat pump technology is an energy-saving and environmentally friendly heating technology based on the reverse Carnot cycle principle. The low-temperature heat in the air is absorbed and gasified by fluorine containing media, then compressed and pressurized by a compressor for heating, and then converted into hot water through a heat exchanger. The compressed high-temperature heat is used to heat the water temperature. Air source heat pump water heaters are mainly used for heating or supplying hot water, and are also a good choice of equipment.
The operating efficiency of geothermal heat pump is higher than that of air source heat pump. COP of air source heat pump is between 2.5-4.0, and COP of geothermal heat pump is between 4.0-6.0. Therefore, geothermal heat pump can save about 30% energy than air source heat pump. However, the energy efficiency of geothermal heat pump will gradually decrease with the increase of service time, while air source heat pump does not have this problem. The air source heat pump system has no environmental pollution, does not damage water resources, and does not affect the underground ecological balance; Geothermal heat pump needs to dig a well, and poor reinjection will cause the foundation to sink and damage the ecological balance, facing the risk of inspection and closure by the environmental protection department.
As long as the geothermal heat pump is put into operation, it has good stability and is not affected by the climate; Air source heat pumps are greatly affected by temperature, and their energy efficiency decreases during low winter temperatures. Geothermal heat pump needs regular maintenance, and the cost is high; Air source heat pumps generally require maintenance, but they are only simple maintenance and cleaning, with low costs.
Geothermal heat pump is not restricted by climate, resources, regions and tectonics, because the heat used is relatively stable, but it is greatly affected by local policies. Air source heat pumps are mainly limited by climate, with lower energy efficiency in areas with low winter temperatures. However, the current operating conditions are -35 ℃, sometimes even lower.
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