Influence of Surface Emissivity of Target Environment on Whole Heat Transfer of Porous Ceramics Radiant Burner

Shuhao Zhang, Qian Xu, Shan Su and Shini Peng
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Shuhao Zhang: Department of Chemical Engineering, University of Manchester, Manchester M13 9PL, UK
Qian Xu: China Quality Inspection & Testing Center for Gas Appliances (Foshan), Foshan 528225, China
Shan Su: School of Civil Engineering, Chongqing University, Chongqing 400030, China
Shini Peng: School of Civil Engineering, Chongqing University, Chongqing 400030, China

Energies, 2022, vol. 15, issue 18, 1-14

Abstract: The heat transfer between a porous ceramic radiant burner (PCRB) and a target environment was studied. The black aluminum pot (BAP) and white aluminum pot (WAP) with an emissivity of 0.72 and 0.22 were experimentally used to obtain the temperature distribution and thermal efficiency of a burner. Under the same heat load, the porous ceramic plate (PCP) of WAP is 79~90 °C higher than BAP, but the measured thermal efficiency of BAP is 15~20% higher than WAP. A heat transfer model for PCRB and pots was established based on the radiant and convection heat transfer theories. This model is applicable to common infrared radiant burners. The heat gain type of the pot was analyzed quantitively, with a relative error of less than 7%. The influence of the pot surface emissivity on the burner and heat transfer change of the pot was discussed, and the solid radiation heat gain of BAP is approximately double that of BAP under the same heat load. For PCRBs whose main heat is from radiation, the pot with a high surface emissivity can achieve better radiation utilization to improve thermal efficiency.

Keywords: porous ceramic radiant burner; target environment; thermal efficiency; surface emissivity; infrared radiation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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