Ground source heat pump-based soil thermophysical property tester and testing vehicle

Abstract

The invention relates to a ground source heat pump-based soil thermophysical property tester and a testing vehicle. The tester comprises a variable-frequency heat pump unit, a first closed loop and a second closed loop; a condenser, a variable-frequency compressor, an evaporator and a throttling element are sequentially connected through tubes to form the variable-frequency heat pump unit; the hot water outlet end of the condenser is sequentially connected with a first variable-frequency water pump, a first temperature sensor, a first electromagnetic flowmeter, a first buried tube, a second temperature sensor and the cold water inlet end of the condenser through tubes, so that the first closed loop is formed; and the cold water outlet end of the evaporator is sequentially connected with a second variable-frequency water pump, a third temperature sensor, a second electromagnetic flowmeter, a second buried tube, a fourth temperature sensor and the hot water inlet end of the evaporator through tubes, so that the second closed loop is formed. The tester overcomes the limitation of the conventional testing method, testing is not affected by outdoor temperature, the equipment number is reduced, the principle is simple, the structure is compact, and the tester is easy to operate.

Description

technical field [0001] The invention relates to a tester for testing the heat transfer performance and soil thermal performance of an underground pipe heat exchanger of a ground source heat pump system, and a test vehicle. Background technique [0002] As a green, energy-saving and environmentally friendly system technology, the ground source heat pump system is more and more widely used in cold and heat source systems. However, due to the lack of shallow geological data, the research on underground pipe heat exchangers has always been a Difficulties of source heat pump technology. However, the buried tube heat exchanger is the core and application basis of the ground source heat pump system, so the testing and research of the buried tube heat exchanger is very important. The heat transfer performance of different forms of the buried tube heat exchanger and the soil It can provide guidance and data support for the engineering simulation and engineering design of the ground ...

AI Technical Summary

Problems solved by technology

However, when the outdoor temperature is lower than 10°C, the performance of the air-cooled heat pump drops significantly or even fails to work, so the measurement of the winter working condition cannot be carried out. Risk of freezing equipment and pipelines due to water in pipelines

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