Wok design: thermal-performance influencing parameters

Z. Zhao, T.T. Wong, C.W. Leung and S.D. Probert

Applied Energy, 2006, vol. 83, issue 4, 387-400

Abstract: Experimental studies have been performed to investigate the thermal performances of woks fabricated from materials with different thermal conductivities and surface emissivities. A pre-mixed air/butane flame impinged vertically upwards upon a flat impingement-plate's (to simulate the wok's flat-bottom) surface under laminar-flow conditions. The operation parameters of the premixed flame were kept constant (i.e., Reynolds number = 1200; equivalence ratio = 1; and nozzle-to-plate distance = 5). In order to examine the effect of conduction, three materials, namely red brass (k = 61 W/mK), bronze (k = 26 W/mK) and stainless steel (k = 14.9 W/mK), were considered. Because of the lower thermal-conductivity and hence higher conduction-resistance, a significantly lower heat-flux would ensue over the stagnation region for the stainless-steel wok. However, there were no significant differences in the heat-flux distributions in the wall-jet regions for the stainless-steel, bronze and red-brass impingement plates. To examine the effects of radiation, three red-brass impingement plates with surface-emissivities of either 0.1, 0.38 or 0.98 were tested experimentally. Different surface-emissivities have only slight impact, on the heat-flux distributions on the wok's surface. In addition, there were only insignificant differences in the heat-flux and temperature distributions in the wall-jet regions of the impingement plates fabricated of the same material but with different surface-emissivities.

Keywords: Wok; material; Thermal; design; Premixed; flame; Impingement; heat-transfer; Thermal; conductivity; Surface; emissivity (search for similar items in EconPapers)
Date: 2006
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306-2619(05)00051-6
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:83:y:2006:i:4:p:387-400

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().