DOAJ Open Access 2018

Comparison of Heat Transfer Coefficient of R-12, R-134a and R-409a for Condensation Based on Existing Correlations

Ram Agrawal Bhupendra Gupta Pradeep Kumar Jhinge Jyoti Bhalavi

Abstrak

The heat transfer coefficient of refrigerants R-12 (dichlorodifluoromethane), R-134a (1, 1, 1, 2, tetrafluoroethane) and R-409a (60 % R22, 25 % R124 and 15 % R142b) are compared on the basis of six existing correlations at condensing temperature 45 °C. Heat transfer coefficients are measured for horizontal tube having internal diameter 8 mm, external diameter 9.52 mm and length of 5 m, mass flux varies from 25 to 450 kg/m2sand quality (dryness fraction) varies from 0 to 1. In the comparison of three refrigerants, Bohdal correlation predict that heat transfer coefficient for R-409a is higher than R-134a and R-12 while according to Cavallini and Zecchin, Shah, Traviss, Huang and Park correlation heat transfer coefficient for R-134a is higher than R-409a and R-12.

Topik & Kata Kunci

Chemical engineering Computer engineering. Computer hardware

Penulis (4)

Ram Agrawal

Bhupendra Gupta

Pradeep Kumar Jhinge

Jyoti Bhalavi

Format Sitasi

APA MLA BibTeX

Agrawal, R., Gupta, B., Jhinge, P.K., Bhalavi, J. (2018). Comparison of Heat Transfer Coefficient of R-12, R-134a and R-409a for Condensation Based on Existing Correlations. https://doi.org/10.3303/CET1871222

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Informasi Jurnal

Tahun Terbit: 2018
Sumber Database: DOAJ
DOI: 10.3303/CET1871222
Akses: Open Access ✓