化工学报 ›› 2023, Vol. 74 ›› Issue (S1): 53-63.DOI: 10.11949/0438-1157.20221586
收稿日期:
2022-12-15
修回日期:
2022-12-25
出版日期:
2023-06-05
发布日期:
2023-09-27
通讯作者:
李舒宏
作者简介:
金正浩(1994—),男,博士研究生,230189430@seu.edu.cn
基金资助:
Zhenghao JIN(), Lijie FENG, Shuhong LI()
Received:
2022-12-15
Revised:
2022-12-25
Online:
2023-06-05
Published:
2023-09-27
Contact:
Shuhong LI
摘要:
氨水吸收-再吸收式热泵(ARHP)是一种特殊的吸收式热泵(AHP),可以在维持供热温度的同时降低工作压力和驱动热源温度,但性能系数较低。提出了一种氨水溶液交叉型吸收-再吸收式热泵,通过合理分配不同浓度的溶液提高系统的性能系数。借助MATLAB建立系统热力学模型并进行能量分析和分析,结果表明,该系统的COP可达1.564,比传统系统高8.1%,且系统损失主要来源于发生器和再吸收器。进一步分析了发生温度、吸收温度、解析温度对系统效率的影响,发现新系统比旧系统的效率提升最多可达6.9%。该系统的提出为吸收-再吸收系统的优化提供重要参考。
中图分类号:
金正浩, 封立杰, 李舒宏. 氨水溶液交叉型再吸收式热泵的能量及分析[J]. 化工学报, 2023, 74(S1): 53-63.
Zhenghao JIN, Lijie FENG, Shuhong LI. Energy and exergy analysis of a solution cross-type absorption-resorption heat pump using NH3/H2O as working fluid[J]. CIESC Journal, 2023, 74(S1): 53-63.
工作条件 | 取值 |
---|---|
发生器热端温差ΔTgen | 5℃ |
吸收器/再吸收器传热温差ΔTabs、ΔTres | 4℃ |
解析器传热温差ΔTdes | 5℃ |
溶液热交换器的冷端温差ΔTSHX | 10℃ |
溶液热交换器的效率η | 85% |
表1 系统的工作条件
Table 1 Working condition of the system
工作条件 | 取值 |
---|---|
发生器热端温差ΔTgen | 5℃ |
吸收器/再吸收器传热温差ΔTabs、ΔTres | 4℃ |
解析器传热温差ΔTdes | 5℃ |
溶液热交换器的冷端温差ΔTSHX | 10℃ |
溶液热交换器的效率η | 85% |
设备名称 | 损I/kW | 损系数Ω/% | ||
---|---|---|---|---|
传统系统 | 溶液交叉型系统 | 传统系统 | 溶液交叉型系统 | |
发生器 | 168.77 | 155.73 | 16.45 | 15.50 |
精馏器 | 40.72 | 0 | 3.97 | 0 |
吸收器 | 70.40 | 62.03 | 6.86 | 6.18 |
再吸收器 | 97.47 | 120.51 | 9.50 | 12.00 |
解析器 | 59.80 | 60.66 | 5.83 | 6.04 |
减压阀1 | 8.41 | 9.02 | 0.82 | 0.90 |
减压阀2 | 2.24 | 2.00 | 0.22 | 0.20 |
溶液泵 | 0 | 0 | 0 | 0 |
换热器1 | 50.32 | 45.64 | 4.91 | 4.54 |
换热器2 | 36.70 | 35.25 | 3.57 | 3.51 |
总计 | 534.79 | 490.84 | 52.13 | 48.86 |
表2 损失的对比
Table 2 Comparison of exergy loss
设备名称 | 损I/kW | 损系数Ω/% | ||
---|---|---|---|---|
传统系统 | 溶液交叉型系统 | 传统系统 | 溶液交叉型系统 | |
发生器 | 168.77 | 155.73 | 16.45 | 15.50 |
精馏器 | 40.72 | 0 | 3.97 | 0 |
吸收器 | 70.40 | 62.03 | 6.86 | 6.18 |
再吸收器 | 97.47 | 120.51 | 9.50 | 12.00 |
解析器 | 59.80 | 60.66 | 5.83 | 6.04 |
减压阀1 | 8.41 | 9.02 | 0.82 | 0.90 |
减压阀2 | 2.24 | 2.00 | 0.22 | 0.20 |
溶液泵 | 0 | 0 | 0 | 0 |
换热器1 | 50.32 | 45.64 | 4.91 | 4.54 |
换热器2 | 36.70 | 35.25 | 3.57 | 3.51 |
总计 | 534.79 | 490.84 | 52.13 | 48.86 |
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