Standardised power of solar cookers with a linear performance curve following the Hottel-Whillier-Bliss formulation

In the present work, an improvement of protocol widely used for reporting thermal behaviour solar cookers is communicated to scientific community. The linear regression represent standardised cooking power based on well-known Hottel-Whillier-Bliss equation written in dimensionless format. authors’ new formulation procedure estimating includes a correction difference between load temperature and ambient air ASAE S580.1 Standard. It derived from simple theoretical deduction, similar ones usually applied flat collectors. factor relates itself with ratio measured irradiance chosen as standard value. As one example, test results funnel cooker loaded water are show impact performance cooker. valid only evidencing clear curve.