Application and development trend of four different heat pump types

Core Tip: After the technology improvement in the 1970s, the heat pump technology was favored by people and re-entered the stage of history. The reporter believes that the main reason lies in its superior recovery of low-temperature waste heat and energy conservation. Features. With the development of heat pump technology, the market segmentation has gradually become obvious, and the application and development of different heat pumps are also the same.

Depending on the energy used by the heat pump, the heat pump can be classified as follows:

First, ground source heat pump

The ground source heat pump is a technology that uses the earth as a heat source to air-condition the building. In the winter, the low-level heat energy in the earth is heated by the heat pump to heat the building, and the cooling capacity is stored for summer use. In the summer, the heat in the building is transferred by a heat pump. Down to the building to cool down the building, while storing heat for winter use. Due to its energy saving, environmental protection, and thermal stability, it has attracted the attention of all 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, especially in the field of heating, which has accumulated a large amount of data and data on design, construction and operation.

Second, air source heat pump

Air is used as the “source body”, and the air source heat pump performs energy transfer through the action of the refrigerant. The current products are mainly domestic heat pump air conditioners, commercial unit heat pump air conditioning units and heat pump hot and cold water units. Heat pump air conditioners have accounted for 40-50% of the sales of household air conditioners, with an annual output of more than 4 million units. Since the early 1990s, heat pump hot and cold water units have been widely used in hot summer and cold winter areas. According to incomplete statistics, the central air-conditioning cold and heat sources in some cities in the region have accounted for 20-30% of heat pump hot and cold water units. And the scope of application continues to expand and there is a tendency to move towards this.

Third, the composite heat pump

In order to compensate for the limitations of a single heat source heat pump and to make full use of low energy, various composite heat pumps have been used. 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 regenerative heat pump, solar-water source heat pump system, thermoelectric water triple combined heat pump, soil - Water source heat pump system, etc.

Fourth, water source heat pump

Groundwater is used as the "source body" for hot and cold. In the winter, the heat pump is used to absorb 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 air-energy heat pump unit has a wide range of applications in China, it has the problem that the heat pump heat supply decreases and frosts with the decrease of outdoor air temperature, and the water source heat pump overcomes the above deficiencies and has high operational reliability. In recent years, domestic applications have gradually expanded.

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