Analysis: Application and Development Trends of Different Heat Pumps

Editor's note: Heat pump technology in the 1970s after the 20th century, after technological improvements, favored by people, re-boarded the stage of history, mainly due to its superior recovery of low-temperature waste heat, energy saving features. With the development of heat pump technology, the market segmentation is also gradually obvious, and the application and development of different heat pumps are also the same in each department. . .

According to the different energy sources used by the heat pump, the heat pump can be classified as follows:

First, the air source heat pump takes air as the "source", and the air source heat pump transfers energy through the action of the refrigerant. The current products are mainly household heat pump air conditioners, commercial unit heat pump air conditioning units and heat pump chillers. Heat pump air conditioners have accounted for 40-50% of the sales of home air conditioners, and the annual output is more than 4 million units. The heat pump chiller/heater unit has been widely used in the hot summer and cold winter areas since the early 1990s. According to incomplete statistics, the use of heat pump chillers and heat exchangers in some cities in the region has accounted for 20–30% of the total. , and the scope of application continues to expand and there is a tendency to move toward this.

Second, the water source heat pump uses groundwater as the source of cold and heat. In the winter, the heat pump absorbs the heat to heat the building. In the summer, the heat pump discharges the absorbed heat to the building to cool the building. Although the current air-energy heat pump unit has a wide range of applications in China, there is a problem that the heat pump heat supply decreases with the decrease of the outdoor air temperature, and the frost problem is solved. The water source heat pump overcomes the above deficiencies and has high operating reliability. In recent years, domestic applications have gradually expanded.

3. The ground source heat pump ground source heat pump is a technology that uses the earth as the heat source to air-condition the building. In winter, the heat energy in the earth will be raised by the heat pump to heat the building, and at the same time, the cold capacity will be stored for summer use; the building will be built by heat pump in summer. The heat inside the object is transferred to the underground to cool the building while storing heat for winter use. Due to its characteristics of energy saving, environmental protection, and thermal stability, it has attracted the attention of countries in the world. The use of ground-source heat pumps in developed countries such as Europe and the United States has a history of several decades. In particular, there have been a lot of data and data on design, construction, and operation in heat supply.

Fourth, the composite heat pump in order to make up for the limitations of a single heat source heat pump and make full use of low energy, using a variety of composite heat pump. Such as air-air heat pump unit, air-water heat pump unit, water-water heat pump unit, water-air heat pump unit, solar-air source heat pump system, air heat recovery heat pump, solar-water source heat pump system, thermoelectric water triple heat pump, soil - Water source heat pump system.