標題: A theoretical model for the nongray radiation drying of polyvinylalcohol/water solutions
作者: Chen, JJ
Lin, JD
機械工程學系
Department of Mechanical Engineering
關鍵字: effective absorption coefficient;irradiation
公開日期: 2004
摘要: A theoretical analysis of heat transfer and moisture variation was performed while a PVA solution was exposed to high-intensity nongray irradiation and/or air flow convection. Effective absorption coefficients were incorporated in the radiative transfer analysis. The influence of various radiation and convection parameters on the transfer of heat and moisture variation in the coated layers on an optically thick substrate was investigated. The effects of radiation and convection parameters on the transfer process were presented in terms of the rate of water content removal, heat transfer, and moisture distribution. Results were compared to those of drying when using convective heat. It is evident that the use of thermal radiation combined with convective heat will help in improving the drying rate. Numerical results show that both the radiative energy absorbed by the solution and the substrate and the distribution of water mass fraction in the solution are closely related to the rate of water removal from the solution during the process.
URI: http://hdl.handle.net/11536/27224
http://dx.doi.org/10.1081/DRT-120034267
ISSN: 0737-3937
DOI: 10.1081/DRT-120034267
期刊: DRYING TECHNOLOGY
Volume: 22
Issue: 4
起始頁: 853
結束頁: 875
Appears in Collections:Articles


Files in This Item:

  1. 000221177200013.pdf