Heat transfer calculation method for pile buried pipe in groundwater seepage environment and verification system thereof

Abstract

The present invention discloses a heat transfer calculation method for a pile buried pipe in a groundwater seepage environment and a verification system thereof. The method comprises: according to a Green function in a groundwater seepage environment, analyzing a temperature response that is generated in an infinite uniform medium when groundwater flows in the medium at a three-dimensional speed; and by using a virtual heat source method, obtaining a heat transfer calculation method for a single pile buried pipe heat exchanger under a groundwater three-dimensional seepage condition. A groundwater flow rate and direction meter is used to obtain the flow rate of local groundwater, which provides an important parameter for using the heat transfer calculation method. Moreover, the verification system using the heat transfer calculation method carries out verification on rationality of the method, simulates the heat transfer process of the pile buried pipe in the groundwater seepage environment under an operating condition of a heat pump unit, and obtains actual data by means of a test. The tested data is compared with the calculation result of the heat transfer method, so that the method is verified, and promotion and application of the method are certified.

Description

technical field [0001] The invention belongs to the technical field of construction environment and energy application engineering, and in particular relates to a heat transfer calculation method and a verification system for pile-buried pipe heat exchangers in the seepage environment of groundwater. Background technique [0002] Ground source heat pump is a clean energy technology with the characteristics of energy saving and environmental protection. This technology uses the underground medium as the cold and heat source, and discharges heat to the ground and absorbs heat from the ground in summer and winter, thereby realizing the cooling and heating of buildings. The ground source heat pump system usually consists of a geothermal heat exchanger, heat pump unit and terminal equipment; the geothermal heat exchanger is the main symbol that distinguishes the system from other types of heat pump systems. At present, the method of drilling and burying U-shaped heat exchange tub...

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Problems solved by technology

Although some heat transfer calculation methods have been proposed in relevant literature, the heat transfer model is not accurate and cannot reflect the shape of the pile foundation spiral buried pipe, and the flow of groundwater is usually along one direction

Moreover, the literature does not verify the existing heat transfer model in combination with the actual heat transfer

[0005] According to the above, there is no accurate calculation method for the heat transfer of the pile-buried pipe heat exchanger under the groundwater seepage environment, and there is no system for verifying the heat transfer calculation method

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