基于热力学第一、第二定律,建立热回收型太阳能分级溶液集热/再生系统的能量与㶲分析数学模型。通过对比分析系统的㶲效率和再生效率,揭示各种因素对系统热力学性能的影响,结果发现系统的㶲效率高于再生效率,说明系统对能量“质”的利用程度高于对能量“量”的利用程度。通过系统各部件㶲损系数分析得到这些参数的最佳范围,优化后的系统再生效率和㶲效率分别为27.3%、29.4%。通过系统㶲损率分析可知,系统中的薄弱环节在一级太阳能集热/再生器、二级太阳能集热/再生器以及填料式除湿器。
Abstract
Based on the first and second laws of thermodynamics, a mathematical model of energy and exergy analysis of the solar graded solution heat collection/regeneration system with heat recovery is established. Exergy efficiency and regeneration efficiency of this system are compared to reveal the influence of various factors on the thermodynamic performance of the system. It is found that exergy efficiency of the system is higher than regeneration efficiency, indicating that the utilization degree of energy quality is higher than that of energy quantity. The optimal ranges of these parameters are obtained by analyzing the exergy loss coefficients of all components of the system. The regeneration efficiency and exergy efficiency of the optimized system are 26.6% and 32.3%, respectively. The analysis on exergy loss rate of the system shows that the weak links in the system are the first-grade solar collector/regenerator, the second-grade solar collector/regenerator and the packed dehumidifier.
关键词
太阳能 /
热回收 /
能量 /
? /
溶液再生
Key words
solar energy /
heat recovery /
energy /
exergy /
liquid regeneration
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 清华大学建筑节能研究中心. 中国建筑节能年度发展研究报告2022(公共建筑专题)[M]. 北京: 中国建筑工业出版社, 2022.
Building Energy Efficiency Center, Tsinghua University. China building energy conservation annual development research report 2022
(special topic on public buildings)[M]special topic on public buildings)[M]. Beijing: China Architecture & Building Press, 2022.
[2] MEHTA J R, RANE M V.Liquid desiccant based solar air conditioning system with novel evacuated tube collector as regenerator[J]. Procedia engineering, 2013, 51: 688-693.
[3] 李刚, 佘灿明, 池兰, 等. 太阳能溶液除湿空调系统的室内热舒适性模拟[J]. 太阳能学报, 2019, 40(8): 2279-2288.
LI G, SHE C M, CHI L, et al.Indoor thermal comfort simulation of solar energy liquid descient air conditioning system[J]. Acta energiae solaris sinica, 2019, 40(8): 2279-2288.
[4] 梁泽德, 李清清. 基于自然冷源驱动和太阳能再生的溶液除湿空调系统研究[J]. 太阳能学报, 2021, 42(6): 211-215.
LIANG Z D, LI Q Q.Research on liquid desiccant air conditioning system driven by natural cold source and solar energy regeneration[J]. Acta energiae solaris sinica, 2021, 42(6): 211-215.
[5] KIRAN N B, MUTHUKUMAR P.Energy, entransy and exergy analyses of a liquid desiccant regenerator[J]. International journal of refrigeration, 2019, 105: 80-91.
[6] ZHANG Q L, LIU X H, ZHANG T, et al.Performance optimization of a heat pump driven liquid desiccant dehumidification system using exergy analysis[J]. Energy, 2020, 204: 117891.
[7] GUAN B W, LIU X H, ZHANG T.Exergy analysis on optimal desiccant solution flow rate in heat exchanger for air dehumidification using liquid desiccant[J]. International journal of refrigeration, 2021, 128: 129-138.
[8] 彭冬根, 罗丹婷, 程小松. 热回收型太阳能分级溶液集热/再生系统模型及环境适用性分析[J]. 化工学报, 2017, 68(8): 3242-3249.
PENG D G, LUO D T, CHENG X S.Modeling and environmental applicability of solar solution grading collector/regenerator system with heat recovery[J]. CIESC journal, 2017, 68(8): 3242-3249.
[9] PENG D G, ZHANG X S.A modified model of solar collector/regenerator considering effect of the glazing temperature[J]. International journal of refrigeration, 2015, 49: 151-159.
[10] PENG D G, ZHOU J M, LUO D T.Exergy analysis of a liquid desiccant evaporative cooling system[J]. International journal of refrigeration, 2017, 82: 495-508.
[11] 朱明善. 能量系统的分析[M]. 北京: 清华大学出版社, 1988.
ZHU M S.Exergy analysis of energy system[M]. Beijing: Tsinghua University Press, 1988.
[12] PENG D G, ZHANG X S.Experimental investigation on regeneration performance, heat and mass transfer characteristics in a forced solar collector/regenerator[J]. Energy, 2016, 101: 296-308.
[13] 彭冬根, 张小松. 应用于太阳能集热再生系统的除湿效率模型[J]. 农业工程学报, 2016, 32(1): 206-211.
PENG D G, ZHANG X S.Dehumidification efficiency model for solar thermal regeneration system[J]. Transactions of the Chinese Society of Agricultural Engineering, 2016, 32(1): 206-211.
基金
国家自然科学基金（51766010）; 南昌市高效制冷技术创新团队（2018-CXTD-004）
PDF(2280 KB)
