Response surface methodology for characterization of wind effect on combined convective loss from a bicylindrical cavity receiver

Abstract

To assess the combined convective loss of a bicylindrical cavity receiver, an investigation was conducted using response surface methodology under varying wind directions, speeds, and cavity tilt angles. The study revealed that wind direction has a more substantial influence on the combined Nusselt number than cavity tilt angle. For all wind speeds and cavity tilt angles, the head-on wind direction results in a higher combined convective loss compared to back-on and side-on wind directions. Wind speed significantly affects the combined Nusselt number at higher cavity tilt angles for the back-on and side-on winds, with the effect diminishing at lower tilt angles. Increasing the tilt angle of the cavity leads to a greater change in the combined Nusselt number as wind speed increases. A quadratic model was developed to predict the combined Nusselt number, which achieves reasonable agreement between the predicted and experimental values, with a deviation of up to 12.5%.

Keywords:

• Bicylindrical cavity receiver
• combined Nusselt number
• response surface methodology
• wind effects

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The present work has, in part, been financially supported by the Deputy of Research and Technology of the University of Sistan and Baluchestan.