R32 Working Principle Of Heat Pump

Water flows from high to low, and heat is transferred from high-temperature objects to low-temperature objects. This is a natural law. However, in real life, for the needs of agricultural irrigation, domestic water, etc., people use water pumps to send water from low to high. Similarly, in today's increasingly tight energy situation, in order to recover the heat from low-temperature hot air that is usually discharged into the atmosphere and low-temperature hot water discharged into rivers, heat pumps are used to transfer heat energy from low-temperature objects to high-temperature objects, and then the high-temperature objects are used to heat water or heat, so that the heat is fully utilized. The working principle of the heat pump system is consistent with that of the refrigeration system. To understand the working principle of the heat pump, you must first understand the working principle of the refrigeration system. The refrigeration system (compression refrigeration) generally consists of four parts: compressor, condenser, throttle valve, and evaporator. Its working process is: low-temperature and low-pressure liquid refrigerant (such as Freon) first absorbs heat from a high-temperature heat source (such as room temperature air) in the evaporator (such as the air conditioner indoor unit) and vaporizes into low-pressure steam. Then the refrigerant gas is compressed into high-temperature and high-pressure steam in the compressor, and the high-temperature and high-pressure gas is cooled and condensed into high-pressure liquid by a low-temperature heat source (such as cooling water) in the condenser. Then it is throttled into low-temperature and low-pressure liquid refrigerant by a throttling element (capillary tube, thermal expansion valve, electronic expansion valve, etc.). In this way, a refrigeration cycle is completed. The performance of a heat pump is generally evaluated by the coefficient of performance (COP performance coefficient). The coefficient of performance is defined as the ratio of the heat transferred from a low-temperature object to a high-temperature object to the required power. Usually the coefficient of performance of a heat pump is about 3-4, that is, the heat pump can transfer 3 to 4 times the heat energy required by itself from a low-temperature object to a high-temperature object. Therefore, a heat pump is essentially a heat-raising device. When it is working, it consumes a small part of the electrical energy itself, but it can extract 4-7 times the electrical energy from the environmental medium (water, air, soil, etc.) to raise the temperature for use. This is also the reason why heat pumps are energy-saving.  Europe, the United States, and Japan are competing to develop new heat pumps. It is reported that the coefficient of performance of new heat pumps can be 6 to 8. If this value can be popularized, it means that energy will be used more effectively. The popularity of heat pumps will also be dramatically improved. Ground source heat pump is a type of heat pump. It is an air conditioning technology that uses the earth or water as a cold and hot source to keep buildings warm in winter and cool in summer. The ground source heat pump only "transfers" energy between the earth and the room. It uses very little electricity to maintain the required indoor temperature. In winter, 1 kilowatt of electricity can send 4-5 kilowatts of heat from the soil or water source into the room. In summer, the process is reversed. The heat in the room is transferred to the soil or water by the heat pump, so that the room gets cool air. The energy obtained underground will be used in winter. This cycle repeats itself, connecting the building space with nature. The most comfortable living environment is obtained at the lowest cost.