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Ground source heat pump thermal response test data processing analysis method with power-off process

A technology of thermal response test and soil source heat pump, which is applied in the field of data processing and analysis of soil source heat pump thermal response test, can solve the problems of long soil temperature recovery time and inability to obtain rock-soil volumetric specific heat capacity, etc., and achieve the effect of saving test time

Active Publication Date: 2015-12-02
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] The technical problem to be solved by the present invention is: the soil temperature recovery time is long after the power failure in the prior art one and the rock-soil volume specific heat capacity ρ cannot be obtained in the prior art two s c s

Method used

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  • Ground source heat pump thermal response test data processing analysis method with power-off process
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  • Ground source heat pump thermal response test data processing analysis method with power-off process

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Embodiment

[0042] The method for processing and analyzing the data of the thermal response test of the soil source heat pump with a power-off process of the present invention includes the following steps:

[0043] The first step is to test the initial temperature T of rock and soil 0 ;

[0044] The second step is to flush the U-shaped vertical buried pipe;

[0045] In the third step, the test instrument is connected with the U-shaped vertical buried pipe of the test hole, and the necessary insulation is carried out;

[0046] The fourth step is to set the heating power of the heater and the flow rate of circulating water in the pipe, and keep it constant during the test;

[0047] The fifth step is to start the operation, conduct the test, and continuously record the temperature of the water entering and exiting the U-shaped vertical buried pipe, the water circulation flow in the pipe and the heating power, and the recording time step is 1 minute;

[0048] The sixth step, when the power...

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Abstract

The present invention discloses a ground source heat pump thermal response test data processing analysis method with a power-off process. The method comprises that a circulating water pump and a heater stop working during power-off; after electricity is recovered, the circulating water pump and the heater are restarted, and the test is continuously performed; during the testing process, the influent temperature and the effluent temperature of the U-shaped vertical buried pipe, the water circulating flow rate in the pipe and the heating power are continuously recorded; and the obtained test data are processed to obtain the rock-soil thermal conductivity ks and the rock-soil volume specific heat capacity [rho]scs. According to the present invention, the problems that the soil temperature recovery time is long after the power-off and the rock-soil volume specific heat capacity [rho]scs can not be obtained in the prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of ground source heat pumps, and relates to a method for processing and analyzing data of a heat response test of a ground source heat pump with a power-off process. Background technique [0002] The buried pipe heat exchanger of the soil source heat pump makes heat exchange between the water circulating in the pipe and the rock and soil outside the pipe through the vertical buried pipe. Since the temperature of the rock and soil is warmer in winter and cooler in summer than the surface air, the performance of the heat pump unit is higher than that of the conventional air source heat pump, and it has become a renewable energy technology that is actively promoted. [0003] Geotechnical thermophysical parameters are the basic data for designing buried pipe heat exchangers in soil source heat pump systems. Inaccurate thermophysical parameters will affect the economy and reliability of system design. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
Inventor 官燕玲江超张宇昊
Owner CHANGAN UNIV
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