Analysis on maximum internal heat recovery of a mass-coupled two stage ammonia water absorption refrigeration system

被引：25
作者：
Du, S. [1 ]
Wang, R. Z. [1 ]
Chen, X. [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Refrigerat & Cryogen, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
来源：
ENERGY | 2017年 / 133卷
关键词：
Ammonia-water; Two stage absorption refrigeration; Mass-coupled; Freezing; Internal heat recovery; LOW-GRADE HEAT; CYCLES; PERFORMANCE;
D O I：
10.1016/j.energy.2017.05.149
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Two stage ammonia-water absorption refrigeration system is applicable for low driving temperature heat source and large temperature lift applications. However, low system performance weakens its advantages because the large heat dissipation brings unacceptable power consumption. Better internal heat recovery is significantly effective for system performance improvement. This paper presents an analysis on maximum internal heat recovery of a mass-coupled two stage ammonia-water absorption refrigeration system by pinch technology. Two sets of freezing conditions are assumed to carry out the analysis. The minimum system heat input and the relevant heat matching are determined by problem table method and grid method. Moreover, the feasible system configurations with optimal energy target are presented under the set conditions according to the grid diagram. The system performance is calculated directly from the problem table. The key point of the maximum internal heat recovery is the heat matching of the streams in the temperature intervals which are adjacent to the pinch point. Compared to a conventional system, the thermal COP of the derived system can be improved by 14.5% and 34.1% under the studied freezing conditions. The improvement is more effective when there is a temperature overlap between the generation and absorption processes. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：822 / 831
页数：10
相关论文
共 26 条
[1]   Experimental and numerical analysis of an air-cooled double-lift NH3-H2O absorption refrigeration system [J].
Aprile, Marcello ;
Toppi, Tommaso ;
Guerra, Marco ;
Motta, Mario .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2015, 50 :57-68
[2]   Comparison of the performance of single-effect, half-effect, double-effect in series and inverse and triple-effect absorption cooling systems operating with the NH3-LiNO3 mixture [J].
Dominguez-Inzunza, L. A. ;
Hernandez-Magallanes, J. A. ;
Sandoval-Reyes, M. ;
Rivera, W. .
APPLIED THERMAL ENGINEERING, 2014, 66 (1-2) :612-620
[3]   Graphical analysis on internal heat recovery of a single stage ammonia-water absorption refrigeration system [J].
Du, S. ;
Wang, R. Z. ;
Xia, Z. Z. .
ENERGY, 2015, 80 :687-694
[4]   Optimal ammonia water absorption refrigeration cycle with maximum internal heat recovery derived from pinch technology [J].
Du, S. ;
Wang, R. Z. ;
Xia, Z. Z. .
ENERGY, 2014, 68 :862-869
[5]   Experimental studies on an air-cooled two-stage NH3-H2O solar absorption air-conditioning prototype [J].
Du, S. ;
Wang, R. Z. ;
Lin, P. ;
Xu, Z. Z. ;
Pan, Q. W. ;
Xu, S. C. .
ENERGY, 2012, 45 (01) :581-587
[6]   The importance of the ammonia purification process in ammonia-water absorption systems [J].
Fernández-Seara, J ;
Sieres, J .
ENERGY CONVERSION AND MANAGEMENT, 2006, 47 (13-14) :1975-1987
[7]  
Harms WT, 1995, PINCH POINT ANAL AID
[8]   Exergetic analysis of a double stage LiBr-H2O thermal compressor cooled by air/water and driven by low grade heat [J].
Izquierdo, M ;
Venegas, M ;
García, N ;
Palacios, E .
ENERGY CONVERSION AND MANAGEMENT, 2005, 46 (7-8) :1029-1042
[9]   Crystallization as a limit to develop solar air-cooled LiBr-H2O absorption systems using low-grade heat [J].
Izquierdo, M ;
Venegas, M ;
Rodríguez, P ;
Lecuona, A .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2004, 81 (02) :205-216
[10]   Experimental studies on air-cooled NH3-H2O based modified gax absorption cooling system [J].
Jawahar, C. P. ;
Saravanan, R. .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2011, 34 (03) :658-666
123