Working Principle Of Heat Pump

Water flows from high to low, and heat is transferred from high-temperature objects to low-temperature objects, which is a natural law. However, in real life, for the needs of agricultural irrigation, domestic water, etc., people use pumps to transport water from low to high places. Similarly, in today's increasingly energy scarce environment, in order to recover the heat typically discharged into the atmosphere from low-temperature hot air and into rivers from low-temperature hot water, heat pumps are used to transfer the heat energy from low-temperature objects to high-temperature objects, which then heat water or provide heating, fully utilizing the heat. The working principle of a heat pump system is consistent with that of a refrigeration system. To understand the working principle of a heat pump, one must first understand the working principle of a refrigeration system. The refrigeration system (compression refrigeration) generally consists of four parts: compressor, condenser, throttle valve, and evaporator. The working process is as follows: a 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 an evaporator (such as an indoor air conditioning unit) and vaporizes into low-pressure vapor. Then the refrigerant gas is compressed into high-temperature and high-pressure vapor in the compressor, which 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 a low-temperature and low-pressure liquid refrigerant through throttling elements (such as capillaries, thermal expansion valves, electronic expansion valves, etc.). This completes a refrigeration cycle. The performance of heat pumps is generally evaluated using the coefficient of refrigeration (COP). The definition of refrigeration coefficient is the ratio of heat transferred from a low-temperature object to a high-temperature object and the required power. The cooling coefficient of a heat pump is usually around 3-4, which means that the heat pump can transfer 3 to 4 times its required energy from a low-temperature object to a high-temperature object. So, a heat pump is essentially a heat boosting device that consumes very little electrical energy during operation. However, it can extract 4-7 times more electrical energy from environmental media (water, air, soil, etc.), increase the temperature, and utilize it. This is also the reason why heat pumps save energy. Europe, America, and Japan are competing to develop new types of heat pumps. According to reports, the cooling coefficient of the new heat pump can range from 6 to 8. If this value can be popularized, it means that energy will be more effectively utilized. The popularity of heat pumps will also be astonishingly increased. Ground source heat pump is a type of heat pump, which is an air conditioning technology that uses the earth or water as a cold and heat source to provide warmth in winter and coolness in summer for buildings. Ground source heat pump only transfers energy between the earth and the indoor environment. Utilize extremely small amounts of electricity to maintain the required temperature indoors. In winter, 1 kilowatt of electricity delivers 4-5 kilowatts of heat from soil or water sources indoors. In summer, the process is reversed, where indoor heat is transferred to the soil or water by a heat pump, providing cool air indoors. The energy obtained underground will be utilized in winter. This cycle is repeated, connecting architectural space with nature. Obtained the most comfortable living environment at the minimum cost.