TY - JOUR
T1 - Performance enhancement of a solar powered air conditioning system using passive techniques and SWCNT /R-407c nano refrigerant
AU - Rahman, Shek
AU - Issa, Salah
AU - Said, Zafar
AU - El Haj Assad, Mamdouh
AU - Zadeh, Rashed
AU - Barani, Yazan
N1 - Publisher Copyright:
© 2019 The Authors.
PY - 2019/12
Y1 - 2019/12
N2 - This work presents a novel solar powered air-conditioning system that operates under UAE climate conditions. Distinct passive techniques and refrigerant-based nanofluids, termed as ''Nano refrigerants'' were investigated to enhance the system performance. Results suggest that the proposed design of using passive techniques such as: roofing reflective material, trees, double-glazed windows, and overhang, reduces the space cooling load by 31.5%. Nano refrigerants effect on the coefficient of performance (COP) resulted in improving COP by adding of 5»vol % single wall carbon nanotube (SWCNT) into R407c refrigerant at temperatures of 283-308 (K). The results indicate that the thermal conductivity of SWCNT/R-407c nano refrigerant increased by about 15.6% compared to the base refrigerant (R-407c) at 305»K. The usage of nano refrigerant reduces consumption of compressor work by 4%. Furthermore, SWCNT/R-407c nanorefrigerant shows the notable improvement of COP of at about 17.02% for thermal conductivity and at about 10.06% for specific heat, respectively compared to R-407c refrigerant. Finally, comparisons between the proposed design and the conventional system as well as with previous literature. Results demonstrate that the proposed system reduces the compressor work by 34% and the COP is increased by 4.59% compared to the conventional air-conditioning system.
AB - This work presents a novel solar powered air-conditioning system that operates under UAE climate conditions. Distinct passive techniques and refrigerant-based nanofluids, termed as ''Nano refrigerants'' were investigated to enhance the system performance. Results suggest that the proposed design of using passive techniques such as: roofing reflective material, trees, double-glazed windows, and overhang, reduces the space cooling load by 31.5%. Nano refrigerants effect on the coefficient of performance (COP) resulted in improving COP by adding of 5»vol % single wall carbon nanotube (SWCNT) into R407c refrigerant at temperatures of 283-308 (K). The results indicate that the thermal conductivity of SWCNT/R-407c nano refrigerant increased by about 15.6% compared to the base refrigerant (R-407c) at 305»K. The usage of nano refrigerant reduces consumption of compressor work by 4%. Furthermore, SWCNT/R-407c nanorefrigerant shows the notable improvement of COP of at about 17.02% for thermal conductivity and at about 10.06% for specific heat, respectively compared to R-407c refrigerant. Finally, comparisons between the proposed design and the conventional system as well as with previous literature. Results demonstrate that the proposed system reduces the compressor work by 34% and the COP is increased by 4.59% compared to the conventional air-conditioning system.
KW - COP
KW - HVAC system
KW - Nanoparticle
KW - Nanorefrigerent
KW - Passive technique
KW - Solar energy
UR - https://www.scopus.com/pages/publications/85075749650
UR - https://www.scopus.com/pages/publications/85075749650#tab=citedBy
U2 - 10.1016/j.csite.2019.100565
DO - 10.1016/j.csite.2019.100565
M3 - Article
AN - SCOPUS:85075749650
SN - 2214-157X
VL - 16
JO - Case Studies in Thermal Engineering
JF - Case Studies in Thermal Engineering
M1 - 100565
ER -
