Parametric exergy analysis of a two-stage vapour compression cycle for freeze desalination comparing eco-friendly refrigerants
by Shrikant Jadhav; S. Pavitran; Suresh Gosavi
International Journal of Exergy (IJEX), Vol. 39, No. 1, 2022

Abstract: The current work aims to analyse a two-stage vapour compression refrigeration (TSVCR) cycle for freeze desalination. In this system, a low-pressure reversible subsystem (LPS) performs simultaneous freezing-thawing. The high-pressure subsystem (HPS) ensures cycle thermal stability. A mathematical model is developed to evaluate energy and exergy performance. Three eco-friendly refrigerants [R1234ze(E), R1234yf and R1243zf] are considered and compared with R22. The results show COP ranging from 6.5 to 12.7, with a specific energy consumption of 8.2 to 14.8 kWh/m3 of freshwater. The highest exergy efficiency of 38.4% is reported for R1243zf, which is higher by 1-3%, compared to R22 and R1234ze(E). However, R1234yf exhibits 11.14% and 7.8% lower energy and exergy performance. The maximum exergy destruction arises from the low pressure compressor (29%) followed by the latent heat condenser (23%). The uncondensed refrigerant significantly affects the performance and thermal stability. The study shows R1243zf and R1234ze are good alternatives to R22 due to their better energy and exergy performance.

Online publication date: Mon, 08-Aug-2022

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Exergy (IJEX):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?


Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com