Heat transfer calculation method and verification system of pile-buried pipe heat exchanger under groundwater seepage environment

Abstract

The invention discloses a heat transfer calculation method and a verification system of a pile buried pipe heat exchanger under a groundwater seepage environment. The temperature response generated in the medium; the heat transfer calculation method of a single pile buried pipe heat exchanger under the condition of three-dimensional seepage of groundwater is obtained by using the virtual heat source method. The groundwater flow velocity meter is used to obtain the local groundwater flow velocity, which provides important parameters for the use of heat transfer calculation methods. At the same time, the rationality of the method is verified by the verification system of the heat transfer calculation method, and the heat transfer process of the pile buried pipe in the groundwater seepage environment is simulated under the working condition of the heat pump unit, and the actual data is obtained through the test. The measured data are compared with the calculation results of the heat transfer method, which verifies the method and provides proof for the popularization and application of the method.

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...

AI Technical Summary

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

Images