Absorption heat transformers and an industrial application

Absorption Heat Transformer (AHT) systems are devices with the unique capability of raising the temperature of low or moderately warm waste heat sources to more useful levels. The study includes an investigation to analyze the AHT systems using water-lithium bromide solutions with water as the refrigerant. First, a basic AHT system was described, the operating sequence was explained and thermodynamic system analysis was presented. Next, an application of the AHT system to an industrial company was analyzed. A computer code was prepared to determine the effect of different parameters on the AHT system performance and the results were presented in graphical form. Additionally, it was shown that how the basic AHT system could be modified to increase the COP and the heat transfer at the absorber, in other words, the hot process water produced. The system performance data were presented in a tabular form for different system modifications from the base system for comparison. It was proven that, by applying different modifications, the COP could be increased by 14.1%, the heat transfer at the absorber by 158.5% and the hot process water produced by 3.59% compared to the basic AHT system.

[1]  Sławomir Smoleń,et al.  Low rate energy use for heating and in industrial energy supply systems—Some technical and economical aspects , 2006 .

[2]  Jincan Chen,et al.  The coefficient of performance of a multi-temperature-level absorption heat transformer at maximum specific heating load , 1998 .

[3]  Lin Shi,et al.  Performance analysis of an absorption heat transformer with different working fluid combinations , 2000 .

[4]  Wilfrido Rivera,et al.  Experimental study of the use of additives in the performance of a single‐stage heat transformer operating with water–lithium bromide , 2005 .

[5]  Soteris A. Kalogirou,et al.  Different methods for modeling absorption heat transformer powered by solar pond , 2007 .

[6]  K. Abrahamsson,et al.  On the efficiencies of absorption heat transformers , 1992 .

[7]  Zongchang Zhao,et al.  Thermodynamic performance of a new type of double absorption heat transformer , 2003 .

[8]  Hongbo Zhang,et al.  Effect of heat treatment on crystallization of Nd:YAG ceramics , 2007 .

[9]  K. Abrahamsson,et al.  Application of absorption heat transformers for energy conservation in the oleochemical industry , 1993 .

[10]  Rosenberg J. Romero,et al.  Portable water purification system integrated to a heat transformer , 2004 .

[11]  I. Horuz,et al.  A comparison between ammonia-water and water-lithium bromide solutions in absorption heat transformers , 2001 .

[12]  S. A. Fartaj,et al.  Comparison of energy, exergy, and entropy balance methods for analysing double‐stage absorption heat transformer cycles , 2004 .

[13]  Li Jian-feng.  Exergy analysis of double absorption heat transformers with a new solution cycle , 2007 .

[14]  Adnan Sözen,et al.  Performance improvement of absorption heat transformer , 2007 .

[15]  Roberto Best,et al.  Single stage and double absorption heat transformers used to recover energy in a distillation column of butane and pentane , 2003 .

[16]  Zongchang Zhao,et al.  Thermodynamic performance of a double-effect absorption heat-transformer using TFE/E181 as the working fluid , 2005 .

[17]  A. Bernatchou,et al.  Solar absorption heat transformer applications to absorption refrigerating machines , 1993 .

[18]  Xiaoyong Qin,et al.  PERFORMANCE OF AN ABSORPTION HEAT-TRANSFORMER WITH DIFFERENT HEAT TRANSFER LAW , 2006 .