Heat Transfer Enhancement Using Different Nanofluid Materials in the Vapor Compression Refrigeration Systems | ||
| Engineering Research Journal (Shoubra) | ||
| Volume 52, Issue 1, January 2023, Pages 87-93 PDF (1.34 M) | ||
| Document Type: Research articles | ||
| DOI: 10.21608/erjsh.2022.160763.1087 | ||
| Authors | ||
| Eed Abdelhafez Abdellahy1; Sherif Hady Taher1; Ahmed Mohamed Hussein2; Ahmed Wafdy Sayed* 3 | ||
| 1Mechanical Engineering, Shoubra, Benha University, Cairo, Egypt | ||
| 2Mechanical Engineering, Higher Technological Institute 10th of Ramadan city, 6th of October branch, Cairo, Egypt | ||
| 3Mechanical Engineering Department Higher Technological Institute-6th of October branch | ||
| Abstract | ||
| This paper aims to study the effect of the addition of Al2O3, CuO and ZnO nano particles to R134a on the evaporative heat transfer coefficient. A horizontal copper tube in a tube heat exchanger is designed and constructed here as a part of the experimental test rig. The heating load is provided by hot water passing through an annulus surrounding the inner copper tube. Measurements were carried out using heat flux ranged from 40 to 80 kW/m2 and nano fluid concentrations ranged from 0.25 % to 1.2 % and nano particle size 25 of nm for all material samples. It is worth mentioning that the evaporative heat transfer coefficient increases and reaches its maximum value at 0.5 % of nanoparticles concentration and then decreases for all nano particles sample this is due to the high thermal conductivity of the material used here. | ||
| Keywords | ||
| Evaporative Heat Transfer Coefficient; Heat Flux; Mass Flux; Nano Concentration | ||
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