First and second law investigation of waste heat based combined power and ejector-absorption refrigeration cycle

2012 ◽  
Vol 35 (1) ◽  
pp. 88-97 ◽  
Author(s):  
Abdul Khaliq ◽  
Basant K. Agrawal ◽  
Rajesh Kumar
Keyword(s):  
Waste Heat ◽  
Second Law ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration

601 Fundamental Characteristics of Generator in Absorption refrigeration cycle driven by waste heat

2008 ◽  
Vol 2008 (0) ◽  
pp. 159-160
Author(s):  
Atsushi TSUJIMORI ◽  
Tetsu KIM ◽  
Ryuta AYABE ◽  
Takumi UEYAMA ◽  
Reika OKAMURA ◽  
...  
Keyword(s):  
Waste Heat ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration

On Evaluating Efficiency of a Combined Power and Cooling Cycle

2003 ◽  
Vol 125 (3) ◽  
pp. 221-227 ◽  
Author(s):  
Sanjay Vijayaraghavan ◽  
D. Y. Goswami
Keyword(s):  
Rankine Cycle ◽  
Exergy Efficiency ◽  
Combined Cycle ◽  
Maximum Efficiency ◽  
Second Law ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration ◽  
Cooling Cycle ◽  
Reduced Gradient ◽  
Generalized Reduced Gradient

A combined power and cooling cycle is being investigated. The cycle is a combination of the Rankine cycle and an absorption refrigeration cycle. Evaluating the efficiency of this cycle is made difficult by the fact that there are two different simultaneous outputs, namely power and refrigeration. An efficiency expression has to appropriately weigh the cooling component in order to allow comparison of this cycle with other cycles. This paper develops several expressions for the first law, second law and exergy efficiency definitions for the combined cycle based on existing definitions in the literature. Some of the developed equations have been recommended for use over others, depending on the comparison being made. Finally, some of these definitions have been applied to the cycle and the performance of the cycle optimized for maximum efficiency. A Generalized Reduced Gradient (GRG) method was used to perform the optimization. The results of these optimizations are presented and discussed.

ENERGY AND EXERGY ANALYSIS OF COMPACT POWER GENERATION AND HYBRID SOLAR ENERGY-WASTE HEAT-BASED TRIPLE EFFECT EJECTOR-VAPOR ABSORPTION REFRIGERATION CYCLE

2013 ◽  
Vol 21 (04) ◽  
pp. 1350023 ◽  
Author(s):  
RAJ KUMAR ◽  
ANIL KUMAR
Keyword(s):  
Power Generation ◽  
Exergy Analysis ◽  
Waste Heat ◽  
Energy Output ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Exhaust Energy ◽  
Vapor Absorption Refrigeration

An NH 3– H 2 O ejector-absorption refrigeration cycle, and an R-152a ejector refrigeration cycle are employed with a renewable energy power generator to make a proposed compact power generation and triple effect ejector-absorption refrigeration cycle. The exergy analysis of the cycle leads to a possible performance improvement. Approximately 71.69% of the input exergy is destructed due to irreversibilities in different components. Around 7.976% is available as the useful exergy output. The exhaust exergy lost to the environment is 20.33%, which is lower than the exhaust energy loss of 47.95%, while the useful energy output is 27.88%. The refrigerants used are of zero ODP and negligible GWP, and the CO 2 emission of the exhaust gases is very small as compared to that of the fossil fuel run engine, hence, this cycle is favorable to the global environment. The results also show that the proposed cycle has significant higher energy and exergy efficiency than the earlier investigated 'triple effect refrigeration cycle' and 'the combined power and ejector-refrigeration cycle'.

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