Thermodynamic study of advanced absorption heat transformers—I. Single and two stage configurations with heat exchangers

✍ Scribed by W. Rivera; R. Best; J. Hernández; C.L. Heard; F.A. Holland

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 553 KB
• Volume: 14
• Category: Article
• ISSN: 0890-4332
• DOI: 10.1016/0890-4332(94)90008-6

✦ Synopsis

AImtraet--A thermodynamic analysis was carried out to study the effect of heat exchanger effectiveness (EF) on the performance of single stage heat transformers (SSHT), Moreover, an analysis of three different arrangements of two stage heat transformers was performed using a mathematical model assuming water/lithium bromide as the working fluid. An increase in the solution heat exchanger effectiveness (EF) greatly improved the performance of absorption heat transformers when the absorber temperature was at least 40°C higher than the temperature of the heat supplied to the system. In two stage heat transformers (TSHT), higher absorber temperatures were obtained by coupling the absorber of the first stage to the evaporator of the second. However, higher performance coefficients were obtained in general by coupling the absorber of the first stage to the generator of the second.