Thermodynamic analysis of an ejector-flash tank-absorption cooling system

Ranj Sirwan, M. A. Alghoul, Kamaruzzaman Sopian, Yusoff Ali

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The performance of a combined ejector-absorption cooling cycle has the potential for further investigation. Improving the performance of the system can be achieved by adding a flash tank to the combined cycle. In this study, an analysis based on the second law of thermodynamics is used to evaluate the cycle before and after modification. A mathematical model is developed to calculate the entropy generation in each component and the total entropy generation of the system, as well as to evaluate the exergy losses. Under operating conditions that match the ambient conditions and a certain application in Malaysia (T gen = 85 C; Tcond = Tabs = 30 C; and T evp = 0 C), the coefficient of performance (COP) and exergetic efficiency (COPexe) values before and after modification are (0.844, 0.875) and (0.459, 0.476), respectively. The maximum exergy loss is found in the evaporator in both cycles, followed by the condenser and the absorber. A statistical t-test is carried out to establish the significance of the differences in the COP and the COPexe before and after modification. It is found that there is significant improvement in combined cycle performance after modification. Overall, adding the flash tank to the combined cycle can be considered a novel enhancement.

Original languageEnglish
Pages (from-to)85-97
Number of pages13
JournalApplied Thermal Engineering
Volume58
Issue number1-2
DOIs
Publication statusPublished - 2013

Fingerprint

Absorption cooling
Exergy
Cooling systems
Entropy
Thermodynamics
Statistical tests
Evaporators
Mathematical models

Keywords

  • Combined ejector-absorption cooling cycle
  • Exergetic efficiency
  • Mathematical analysis
  • Modification by adding flash tank
  • Statistical T-test

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Thermodynamic analysis of an ejector-flash tank-absorption cooling system. / Sirwan, Ranj; Alghoul, M. A.; Sopian, Kamaruzzaman; Ali, Yusoff.

In: Applied Thermal Engineering, Vol. 58, No. 1-2, 2013, p. 85-97.

Research output: Contribution to journalArticle

Sirwan, Ranj ; Alghoul, M. A. ; Sopian, Kamaruzzaman ; Ali, Yusoff. / Thermodynamic analysis of an ejector-flash tank-absorption cooling system. In: Applied Thermal Engineering. 2013 ; Vol. 58, No. 1-2. pp. 85-97.
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