| 张晓宇*,刘嘉濛* **.跨临界CO2复叠热泵烘干系统的经济热力学研究[J].高技术通讯(中文),2025,35(3):309~317 |
| 跨临界CO2复叠热泵烘干系统的经济热力学研究 |
| Study on economic thermodynamics of transcritical CO2 cascade heat pump drying system |
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| DOI：10. 3772 / j. issn. 1002-0470. 2025. 03. 008 |
| 中文关键词: CO2热泵； 复叠式热泵； 高温干燥； 反向传播神经网络 |
| 英文关键词: CO2 heat pump, cascade heat pump, high temperature drying, back propagation neural network (BPNN) |
| 基金项目: |
| 作者 | 单位 | | 张晓宇* | （*浙江工业大学机械工程学院杭州 310023）
（**嵊州市浙江工业大学创新研究院嵊州 312400） | | 刘嘉濛* ** | |
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| 中文摘要: |
| 干燥作为能源密集型产业，常以燃煤、燃油等化石燃料作为热源，经济性差且对环境造成破坏。热泵干燥技术以消耗少量能量为代价，将低品位能量转化为高品位能量，在节能减排上拥有巨大的潜力。二氧化碳(CO2)作为热泵工质除了具有环保、廉价、良好的传输性能和传热特性等优势外，其冷却过程的温度滑移更适合热泵干燥过程。目前热泵技术正向着应用范围更广的高温热泵方向发展。为了提高CO2热泵干燥技术的温度，本文提出了一种新型高温CO2复叠式热泵干燥系统，采用了反向传播（back propagation，BP）人工神经网络（artificial neural network，ANN）的方法对该系统的整体性能进行预测。结果表明，该系统具有较高的效率，系统整体性能随着环境温度的上升而提高，经济收益随着CO2压缩机排气压力的变大而大幅提升。本文提出的新型高温CO2跨临界复叠热泵烘干系统有望为高温热泵干燥系统及系统节能提供新的思路。 |
| 英文摘要: |
| As an energy-intensive industry, drying process often uses fossil fuels such as coal and oil as heat sources. This way results in poor economy and damage to the environment. Heat pump drying technology converts low-grade energy into high-grade energy at the expense of consuming a small amount of energy, which has great potential in energy conservation and emission reduction. As a refrigerant of heat pump, CO2 not only has the advantages of environmental protection, low cost, good transmission performance and heat transfer characteristics, but also its temperature slip in the cooling process is more suitable for the heat pump drying process. At present, heat pump technology is developing in the direction of high temperature heat pump with wider application. In order to improve the temperature of CO2 heat pump drying technology, a new type of high temperature CO2 cascade heat pump drying system is proposed in this paper. The back propagation (BP) artificial neural network (ANN) method is used to predict the overall performance of the system. The results show that the system has high efficiency. The overall performance of the system increases with the increase of ambient temperature and the economic benefits increases significantly with the increase of CO2 compressor exhaust pressure. The new high temperature CO2 transcritical cascade heat pump drying system proposed in this paper is expected to provide new ideas for design of the high temperature heat pump drying system and system energy saving. |
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