Optimization of Heat Transfer Performance and Economic Analysis for Phase-Change Sleeve-Type Ground Heat Exchanger

Ding Shumei; Zhu Bairu; Wei Erjian

doi:10.12465/issn.0253-4339.20260710002

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Optimization of Heat Transfer Performance and Economic Analysis for Phase-Change Sleeve-Type Ground Heat Exchanger

更新时间：2026-11-02

- Optimization of Heat Transfer Performance and Economic Analysis for Phase-Change Sleeve-Type Ground Heat Exchanger
- Journal of Refrigeration Pages: 1-10(2026)
- 作者机构：
  
  河南工业职业技术大学建筑工程学院南阳 473000
- 作者简介：
  
  Ding Shumei， female， lecturer， College of Civil Engineering， Henan University of Industry Technology， 86-13523677188， E-mail： tjpp122@sina.com. Research fields： civil engineering technology， green and low-carbon， and engineering management.
- 基金信息：
- DOI：10.12465/issn.0253-4339.20260710002
  CLC： TB61⁺1;TK529
- Received：10 July 2026，
  
  Revised：2026-08-05，
  
  Accepted：22 September 2026，
  
  Online First：02 November 2026，
- 稿件说明：
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丁舒媚，朱白茹，魏二剑. 相变套管型地埋管换热器换热性能优化及经济性分析［J］. 制冷学报，XXXX，XX（XX）：1-10.

Ding Shumei，Zhu Bairu，Wei Erjian. Optimization of Heat Transfer Performance and Economic Analysis for Phase-Change Sleeve-Type Ground Heat Exchanger［J］. Journal of Refrigeration，XXXX，XX（XX）：1-10.
丁舒媚，朱白茹，魏二剑. 相变套管型地埋管换热器换热性能优化及经济性分析［J］. 制冷学报，XXXX，XX（XX）：1-10. DOI： 10.12465/issn.0253-4339.20260710002.

Ding Shumei，Zhu Bairu，Wei Erjian. Optimization of Heat Transfer Performance and Economic Analysis for Phase-Change Sleeve-Type Ground Heat Exchanger［J］. Journal of Refrigeration，XXXX，XX（XX）：1-10. DOI： 10.12465/issn.0253-4339.20260710002.

摘要

为研究低PCM体积占比的相变套管对地埋管换热器换热和经济性影响，本文基于COMSOL搭建了相变套管型地埋管换热器（phase-change sleeve-type ground heat exchanger，PCS-GHE）3D模型，通过优选PCM种类、体积掺量和导热系数提升了PCS-GHE传热性能，并结合工程案例评价了不同方案的建设成本。结果表明：PCM1（CA-LA-金属导热增强材料）具有较优的传热效果和循环蓄放热能力，更适合作为相变套管夹层材料。当PCM1掺量由10.73%增至30.60%时，第3天末，PCS-GHE总热阻增加约19.5%，其单位传热功率下降约20.3%，回填土温度下降约0.85 ℃。当导热系数由0.6增至1.8 W/（m·K）时，PCM层热阻和PCS-GHE总热阻分别下降约66.5%和38.4%，单位传热功率提升约42.6%。经济性分析表明，PCM1掺量增加导致建筑制冷所需建设投资成本上升；而PCM导热系数增加可有效节约建设投资成本。PCM1导热系数为1.8 W/（m·K）时，PCS-GHE建设成本最优，可节约26.3%和20.5%的PCM与建设投资成本。

Abstract

A three-dimensional model of a phase-change sleeve-type ground heat exchanger （PCS-GHE） was developed using COMSOL to investigate the effects of a low PCM volume fraction in a phase-change sleeve on the heat transfer performance and construction cost economics. The heat-transfer performance of the PCS-GHE was improved by optimizing the PCM type， volume dosage， and thermal conductivity. The economic feasibility of construction was evaluated based on an engineering case study. The results show that PCM1， namely the CA-LA-metal thermal conductivity-enhancing material， exhibited a relatively high heat transfer performance， making it more suitable as a phase-change interlayer material for the sleeve. At the end of the third day， when the volume dosage of PCM1 increased from 10.73% to 30.60%， the total thermal resistance of the PCS-GHE increased by approximately 19.5%. The unit heat transfer power and backfill soil temperature decreased by approximately 20.3% and 0.85 ℃， respectively. When the thermal conductivity of PCM1 was increased from 0.6 to 1.8 W/（m·K）， the thermal resistance of the PCM layer and the total thermal resistance of the PCS-GHE decreased by approximately 66.5% and 38.4%， respectively. The unit heat transfer power increases by approximately 42.6%. An increase in the volume dosage of PCM1 led to a higher construction investment for building cooling. In contrast， an increase in PCM thermal conductivity effectively reduces construction investment. When the PCM thermal conductivity was 1.8 W/（m·K）， the construction cost of the PCS-GHE achieved the lowest cost， with the PCM cost and construction investment reduced by 26.3% and 20.5%， respectively.

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