Theoretical Derivation of Thermal Value Equations for Heating Furnaces
Theoretical Derivation of Thermal Value Equations for Heating Furnaces作者机构：Institute of Thermal and Environmental Engineering Northeastern University Shenyang China
出 版 物：《Open Journal of Applied Sciences》 (应用科学（英文）)
年 卷 期：2012年第2卷第2期
页 面：104-109页
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
主 题：Thermal Value Continuous Heating Furnace Batch-Type Heating Furnace Regenerative Heating Furnace Energy Utilization Degree Heat Transfer
摘 要：Based on thermal value theory, the aim of this paper is to deduce the theoretical formulas for evaluating the energy effective utilization degree in technological pyrological processes exemplified by metallurgical heating furnaces. Heat transfer models for continuous heating furnaces, batch-type heating furnaces, and regenerative heating furnaces are established, respectively. By analyzing the movement path of injected infinitesimal heat attached on steel or gas, thermal value equations of continuous, batch-type, and regenerative heating furnaces are derived. Then the influences of such factors as hot charging, gas preheating and intake time of heat on energy effective utilization degree are discussed by thermal value equations. The results show that thermal value rises with hot charging and air preheating for continuous heating furnaces, with shorter intake time when heat is attached on steel or longer intake time when heat is attached on gas for batch-type heating furnaces and that with more heat supply at early heating stage or less at late stage for regenerative heating furnaces.
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