Studies on the effect of temperature and time on the SS 304 surface for the properties degradation of the solar collector

ABSTRACT

The properties of emissivity (є) and absorptivity (α) of the surface of the material is an essential output for the solar collector. This paper highlights the work based on the RSM design expert, to study the effect of parameters’ temperature and time when the surface is exposed to sunlight and absorbing the properties of emissivity and absorptivity of the material SS 304. The temperature range of the SS 304 varied from 20°C to 356°C for various time intervals from 90 to 1100 h. From this experimental work, it is clearly seen that the emissivity rate increased when the surface is focused onto sunlight beyond the saturated level. The absorptivity of the surface of SS 304 increases till the optimum level and reaches the saturated level. As a result, after the optimum level, emissivity rate of the surface increases, and absorptivity of the surface decreases when it is focused onto sunlight.

KEYWORDS:

• Emissivity
• absorptivity
• degree of freedom

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Jeya Jeevahan http://orcid.org/0000-0002-1877-3197