Prediction of heat transfer coefficient and pressure drop in wire heat exchanger working with R-134a and R-600a
Other Title(s)
التنبؤ بمعامل انتقال الحرارة و هبوط الضغط لمبادل حراري سلكي يعمل مع وسيط تبريدR-600a و R-134a
Joint Authors
al-Qaysi, Luayy Abd al-Aziz Mahdi
Latif, Ahmad Yusuf
Source
Issue
Vol. 25, Issue 11 (30 Nov. 2019), pp.1-20, 20 p.
Publisher
University of Baghdad College of Engineering
Publication Date
2019-11-30
Country of Publication
Iraq
No. of Pages
20
Main Subjects
Abstract EN
An experimental and theoretical works were carried out to model the wire condenser in the domestic refrigerator by calculating the heat transfer coefficient and pressure drop and finding the optimum performance.
The two methods were used for calculation, zone method, and an integral method.
The work was conducted by using two wire condensers with equal length but different in tube diameters, two refrigerants, R-134a and R-600a, and two different compressors matching the refrigerant type.
In the experimental work, the optimum charge was found for the refrigerator according to ASHRAE recommendation.
Then, the tests were done at 32˚C ambient temperature in a closed room with dimension (2m*2m*3m).
The results showed that the average heat transfer coefficient for the R-600a was higher than the R-134a, so the length of the wire tube was longer with R-134a than R-600a.
The pressure drop for the smaller tube diameter was higher than the other tube.
The second law thermodynamic efficiency was higher for R-600a, which reached 41%.
The entropy generation minimization analysis showed that the R-600a refrigerant type and smaller tube diameter are approached the optimum point.
American Psychological Association (APA)
al-Qaysi, Luayy Abd al-Aziz Mahdi& Latif, Ahmad Yusuf. 2019. Prediction of heat transfer coefficient and pressure drop in wire heat exchanger working with R-134a and R-600a. Journal of Engineering،Vol. 25, no. 11, pp.1-20.
https://search.emarefa.net/detail/BIM-910367
Modern Language Association (MLA)
al-Qaysi, Luayy Abd al-Aziz Mahdi& Latif, Ahmad Yusuf. Prediction of heat transfer coefficient and pressure drop in wire heat exchanger working with R-134a and R-600a. Journal of Engineering Vol. 25, no. 11 (Nov. 2019), pp.1-20.
https://search.emarefa.net/detail/BIM-910367
American Medical Association (AMA)
al-Qaysi, Luayy Abd al-Aziz Mahdi& Latif, Ahmad Yusuf. Prediction of heat transfer coefficient and pressure drop in wire heat exchanger working with R-134a and R-600a. Journal of Engineering. 2019. Vol. 25, no. 11, pp.1-20.
https://search.emarefa.net/detail/BIM-910367
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 19-20
Record ID
BIM-910367