Movable ground source heat pump thermal response test instrument and testing method

Abstract

The invention relates to a movable ground source heat pump thermal response test instrument and a testing method. The movable ground source heat pump thermal response test instrument comprises a vertical U-shaped pipe buried in a ground source to be detected, a water box, an electric heater, a circulating water pump, a flowmeter, two temperature sensors, a power adjusting instrument, a PID (Proportion Integration Differentiation) controller, a data acquisition instrument and a frequency converter, wherein the vertical U-shaped pipe is connected with a water inlet and a water outlet of the water box, the electric heater is placed on the bottom of the water box, the two temperature sensors are respectively arranged in a water inlet pipe port and a water outlet pipe port of the vertical U-shaped pipe, the flowmeter is arranged in the water inlet pipe port of the water box, and signals of the flowmeter and the two temperature sensors are sent to the data acquisition instrument, signals of the temperature sensors in the water inlet pipe port of the vertical U-shaped pipe are sent to the PID controller, an output signal of the PID controller is sent to the power adjusting instrument for controlling the electric heater, and the frequency converter controls the circulating water pump. The test instrument can finish a soil thermal response test of a ground source heat pump under two working conditions with constant heat flux or steady temperature, the real-time data acquisition and analysis are realized in the test, and the accurate soil thermal response data is obtained.

Description

technical field [0001] The invention relates to a test technology, in particular to a mobile ground source heat pump soil thermal response tester and a test method. Background technique [0002] Because of its high efficiency, energy saving and environmental protection, the ground source heat pump system has been widely promoted in the environment of building energy conservation in my country. Due to the change of underground soil conditions in various places, the heat absorption and heat release during the operation of the heat pump vary greatly. Therefore, the collection of basic data before the design of the ground source heat pump and the test of the thermal response of the deep soil are very important, especially for ground source The design and installation of the heat pump buried pipe heat exchanger play a direct guiding role. At present, there is no conventional test method, and there is no provision in this regard in the national standard. Determining the thermophy...

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Problems solved by technology

Due to the change of underground soil conditions in various places, the heat absorption and heat release during the operation of the heat pump vary greatly. Therefore, the collection of basic data before the design of the ground source heat pump and the test of the thermal response of the deep soil are very important, especially for ground source The design and installation of the heat pump buried pipe heat exchanger play a direct guiding role. At present, there is no conventional test method, and there is no provision in this regard in the national standard.

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