| 摘要: |
| 干燥工艺在工、农业生产中耗能巨大，研究和应用实践表明相比于其他干燥技术，热泵干燥技术具有较好的节能效果和经济效益。CO2作为自然工质对环境友好，而且跨临界CO2循环放热过程具有明显的温度滑移，相比常规工质冷凝温度恒定的亚临界循环，更适合用于热泵干燥工艺。本文阐述了跨临界CO2热泵干燥系统的研究现状,从CO2热泵干燥应用的可行性、系统模型建立与关键参数分析、实验研究以及系统优化等几个方面进行了深入讨论，并总结了各种CO2热泵干燥系统优化方式的优缺点，提出了目前跨临界CO2热泵干燥系统研究中存在的问题，为CO2热泵干燥技术未来的研究应用提供参考。 |
| 关键词: 热泵干燥 跨临界循环 理论分析 实验研究 系统优化 |
| DOI： |
| 投稿时间：2022-04-11 修订日期：2022-05-19
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| 基金项目:国家重点研发计划项目(2021YFE0116100)，国家自然科学基金(51806151)，天津市自然科学基金（20JCQNJC00600）和食品冷链装置节能及储运新技术创新团队项目（TD13-5088）资助。 |
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| Research Status and Progress of Transcritical CO2 Heat Pump Drying Systems |
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Liu Shengchun1, Lin Jiansen1, Hua Xue2, Li Xiongya2, Dai Baomin1, Sun Zhili1, Shao Changbo3
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| (1.Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce;2.Foreign Environmental Cooperation Center, Ministry of Ecology and Environment;3.Shandong Institute of Commerce and Technology) |
| Abstract: |
| The drying process consumes large amounts of energy in industrial and agricultural production. Research and practical applications show that compared with other drying technologies, the heat pump drying technology has better energy-saving potential and economic benefits. As a natural working medium, CO2 is environmentally friendly. The transcritical CO2 cycle has a clear temperature glide, which is more suitable for heat pump drying than the subcritical cycle with a constant condensing temperature of a conventional working fluids. In this paper, the research status of the transcritical CO2 heat pump drying systems is described. The feasibility of the application, system model establishment and key parameter analysis, experimental research, and system optimization of CO2 heat pump drying system are discussed in depth. The advantages and disadvantages of various CO2 heat pump drying system optimization methods are summarized. Existing limitations in the current research of transcritical CO2 heat pump drying systems are proposed, thereby providing a reference for future research applications of CO2 heat-pump-drying technology. |
| Key words: heat pump drying transcritical cycle theoretical analysis experimental research system optimization |
