| 摘要: |
| 为了使土壤源热泵系统能够长期高效的运行，需要保持土壤以年为周期的热平衡，必要时需添加辅助冷热源。本文提出了一种土壤热平衡的评价方法，给出热平衡方程，并定义土壤年热平衡率，得出土壤热平衡点Δg0，浮动范围80%Δg0~120%Δg0，其上下限分别对应冷临界地区和热临界地区。根据示范工程所做出的蓄热、供热、供冷实验数据，得出了系统的热平衡点为80%、浮动范围为65%~95%，这可作为衡量土壤热平衡的指标，并可评价得出太阳能季节性蓄热土壤源热泵（GCHPSSHS）系统适用于我国的严寒地区以及部分寒冷A区。基于年热平衡率的土壤热平衡评价方法可以分析添加辅助冷源和热源的土壤源热泵系统的土壤热平衡问题，并可用于评价系统的地区适用性，设计能保持土壤热平衡的高效系统。 |
| 关键词: 土壤源热泵 土壤热平衡 评价方法 年热平衡率 辅助冷热源 |
| DOI： |
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| 基金项目: |
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| Research on Evaluation Method of Soil Heat Balance of Ground-Coupled Heat Pump System |
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Lü Chao1, Zheng Maoyu2
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| (1.School of Civil Engineering and Architecture, Zhejiang Sci-Tech University;2.School of Municipal and Environmental Engineering, Harbin Institute of Technology) |
| Abstract: |
| In order to make ground-coupled heat pump system operate efficiently in long term, soil needs to be maintained heat balance in an annual cycle. Auxiliary cold source or heat source is needed if necessary. An evaluation method of soil heat balance was proposed, heat balance equation was given, and annual heat balance rate of soil was also defined. Soil heat balance point Δg0 and floating range 80%Δg0~120%Δg0 were derived, where the upper and lower limit correspond to the cold critical region and hot critical region, respectively. According to field data of heat storage, heating and cooling experiments based on the demonstration project, heat balance point was 80% and floating range was 65%~95%, which can be used as indices to measure soil heat balance. Based on the indices, it is evaluated that the ground-coupled heat pump with solar seasonal heat storage (GCHPSSHS) system could be applied to severe cold zone and a part of cold zone A of China. The evaluation method of soil heat balance based on annual heat balance rate can be used to analyze soil heat balance problem of ground-coupled heat pump system with auxiliary cold source or heat source, evaluate the regional applicability of the system, and design an efficient system which can keep soil heat balance. |
| Key words: ground-coupled heat pump soil heat balance evaluation method annual heat balance rate auxiliary cold source or heat source |
