• K.PITCHAIMANI
• R.V.JEBA RAJASEKHAR

Solar collector is used to match the demand and supply of hot water. It is essential to improve the thermal performance of solar collectors with nano-structured fins and external reflectors. It is also essential to estimate the thermal performance of solar collectors with nano-structured fins and external reflectors so as to study their suitability in application sectors. In the present investigation, the solar heating systems with nano-structured fins and external reflectors of different materials of reflectors were tested. The experimental results showed that the temperature elevation of working fluid ranged between 19.9 and 30.3 0C with the corresponding thermal performance variation of 32 to 41% in the aluminium reflector based heating device. The experimental results also showed that the temperature elevation of working fluid varied from 24.3 to 31.1 0C with the corresponding thermal performance variation of 31 to 44% in the stainless steel reflector based heating device. The experimental results also revealed that the minimum temperature elevation was 24.0 0C and the maximum temperature elevation of working fluid was 32.2 0C with the thermal efficiency variation of 35 to 46% in the anodized metal reflector integrated heating device. As the nano-structured fins and anodized metal reflector integrated heating device had the highest efficiency, it could be concluded that the solar heating devices with nano-structured fins and anodized metal reflectors would be effectively used in the application sectors.

Solar heating device – Nano-structured fins – External reflectors – Thermal enhancements – Thermal performances

"THERMAL PERFORMANCES OF NANO CARBON-CHROMIUM OXIDE COATED FINS AND EXTERNAL REFLECTOR INTEGRATED SOLAR HEATING DEVICE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.79-81, May 2019, Available :http://www.jetir.org/papers/JETIR1905Y12.pdf

"THERMAL PERFORMANCES OF NANO CARBON-CHROMIUM OXIDE COATED FINS AND EXTERNAL REFLECTOR INTEGRATED SOLAR HEATING DEVICE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp79-81, May 2019, Available at : http://www.jetir.org/papers/JETIR1905Y12.pdf