A novel low-grade heat-driven absorption refrigeration system with LiCl-H2O and LiBr-H2O working pairs

被引：64
|
作者：
She, Xiaohui [1 ]
Yin, Yonggao [1 ,2 ,3 ]
Xu, Mengfei [1 ]
Zhang, Xiaosong [1 ,2 ,3 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China
[2] Southeast Univ, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Jiangsu, Peoples R China
[3] Southeast Univ, Jiangsu Prov Key Lab Solar Energy Sci & Technol, Nanjing 210096, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2015年 / 58卷
关键词：
Absorption refrigeration; Two working pairs; LiCl-H2O; LiBr-H2O; Low-grade heat; THERMODYNAMIC PROPERTIES; AQUEOUS-SOLUTIONS; WATER; PERFORMANCE; LITHIUM; TEMPERATURE; CYCLE;
D O I：
10.1016/j.ijrefrig.2015.06.016
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A novel low grade heat-driven absorption refrigeration system is proposed, where LiCl-H2O with higher vapor pressure is used in the high-pressure cycle and LiBr-H2O with lower vapor pressure is employed in the low-pressure cycle. Effects of key parameters on the system performance are analyzed, and different heat source utilization modes are considered: parallel modes (PM-1 and PM-2) and serial mode (SM). What's more, comparisons among the PM-1, PM-2, SM and the traditional double-stage LiBr-H2O absorption system (TDS) are made. Results show that the PM-1 has much higher COP than the TDS under small ranges of working conditions, with the maximum COP improvement 26.7%, while the PM-2 shows prominent advantages under wider ranges, with the maximum COP improvement 35%. In addition, The PM-1 shows much higher COP than the SM under higher condensing temperature and evaporation temperature, while the SM has much lower heat source outlet temperature which is at most 12 degrees C lower than that of the PM-1. The intermediate pressure is important for the system performance and the optimum value is 2.27 kPa in the PM-1 and 2.5 kPa in the SM. For the PM-2, the intermediate pressure should be chosen to achieve low circulation ratio in the low pressure cycle. (C) 2015 Elsevier Ltd and IIR. All rights reserved.
引用
收藏
页码：219 / 234
页数：16
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