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为了提高余热回收效率，提出一种基于氨基甲酸铵(AC)可逆化学反应与吸收式相结合的热泵系统，以热驱动为主，电驱动辅助，利用AC分解回收低品位余热，反应热可达2 010 kJ/kg，约为R134a和NH3潜热的13.4倍和1.8倍，具有很大的应用优势。结合AC反应特性建立稳态热力学模型，研究表明：随着反应温差增大，系统性能系数(COP)减小，反应温差平均每升高5℃，COP减小约4.22%，且系统运行的最大反应温差为35℃；随着AC在载体溶剂中浓度和反应转化率的增大，系统COP增大。与相同工况下常规吸收式热泵相比，AC热泵COP约为LiBr/H2O吸收式热泵COP的1.4倍、NH3/H2O吸收式热泵COP的1.8倍，具有明显的性能优势。
Abstract：In order to improve the heat recovery efficiency, a heat pump system based on ammonium carbamate(AC) reversible chemical reaction combined with absorption is proposed, in which AC decomposes to recover waste heat. The reaction heat of AC(2 010 kJ/kg) is around 13.4 times and 1.8 times that of R134a and NH3, respectively.A steady-state thermodynamic model is established and results show that as the temperature difference of reaction increases, coefficient of performance(COP) decreases. For every 5 ℃ increase in temperature difference of reaction,the COP decreases by approximately 4.22%, and the reaction temperature difference should not exceed 35 ℃. While the greater the concentration of AC and conversion rate are, the greater the COP is. Compared with the conventional absorption heat pump cycles, the COP of AC heat pump is about 1.4 times of that of LiBr/H2O absorption heat pump and 1.8 times of NH3/H2O absorption heat pump, demonstrating significant performance advantages.
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基本信息:
DOI：
中图分类号:TQ051.5
引用信息:
[1]李伟格,殷勇高,戴苏洲.基于可逆化学反应的选择性吸收-压缩复合热泵循环[J].制冷技术,2025,45(01):1-6+12.
基金信息:
国家重点研发计划（No.2018YFC0705306）; 国家自然科学基金（No.52076039）