Study on the simplified model of vertical double U-pipe ground heat exchanger

IF 1.1 4区工程技术 Q4 THERMODYNAMICS Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci220922048w

Xin Wang, Qiang Fu, Changlong Wang

引用次数: 0

Abstract

A simplified semi-analytical model of vertical double U-pipe ground heat exchanger (VDUGHE) was established. The validity of the established model is examined by contrasting the figured outcomes with experiment data, emulation results of 3D numerical model and calculation results of infinite line-source model (ILSM) for different inlet boundary conditions and configurations. After 1 hour, the semi-analytical model?s relative error is less than 0.32% under the boundary condition of given inlet fluid temperature. Under the boundary condition of given total heat input rate, the semi-analytical model?s relative error after 10 hours is less than 0.11%, while the ILSM?s relative error is less than 0.60%. The semi-analytical model is in good agreement with experiment and numerical model, and has higher calculation accuracy than ILSM.

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立式双u型管地下换热器简化模型研究

建立了垂直双u型管地下换热器的简化半解析模型。通过与实验数据、三维数值模型仿真结果和无限线源模型(ILSM)在不同进气道边界条件和配置下的计算结果进行对比，验证了所建模型的有效性。1小时后，半解析模型?在给定进口流体温度的边界条件下，S的相对误差小于0.32%。在总热输入率给定的边界条件下，半解析模型?的相对误差小于0.11%，而ILSM?S的相对误差小于0.60%。半解析模型与实验和数值模型吻合较好，计算精度高于ILSM。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.