Radiative Efficiency of a Quartz Radiant Heating Tube

Abstract

Radiative efficiencies are reported for 10,15,20 and 25 kW, Φ = 0.6 and 0.8, natural gas/air flames burned with an industrial fuel/air nozzle and confined in a quartz radiant heating tube. The radiativee efficiencies of corresponding unconfined flames are also reported. Radiative efficiencies of the confined flame/tube combination are at least three times higher than those of the unconfined flames suggesting strong participation by the confining quartz tube in the heat transfer process.

Key words:

• Confined flames
• quartz tubes
• natural gas burners
• radiation heat transfer

Additional information

Notes on contributors

J. P. GORE

J. P. Gore, 1003 Chaffee Hall, Purdue University, W. Lafayette, IN 47907-1003, Tel.: [phone]; Fax: [phone]; e-mail: [email protected].