| 换热器能量系统的损失与效率分析 |
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| 引用本文： | 罗贻乡.换热器能量系统的损失与效率分析[J].石油天然气学报,1991(4). |
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| 作者姓名： | 罗贻乡 |
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| 作者单位： | 江汉石油学院机械系 |
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| 摘 要： | 文章建立了换热器传热过程的数学模型,导出了其损失参数的计算式,并对效率进行了图形分析。结果表明:以顺逆流为主的换热器的损失与效率,随传热单元数NTU与水当量之比的变化而变化,合理选取这两个参数,可使效率达到一最佳值,从而为换热器的优化设计提供依据。图4参6
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| 关 键 词： | 换热器 能量系统 损失 传热单元数 水当量 效率 |
Analysis of the Exergic Losses and Efficiency in the Energy System of a Heat Exchangers |
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| Luo Yixiang.Analysis of the Exergic Losses and Efficiency in the Energy System of a Heat Exchangers[J].Journal of Oil and Gas Technology,1991(4). |
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| Authors: | Luo Yixiang |
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| Abstract: | In this paper a mathematical model of exergy is developed for heat transfering processes of heatexchangers and a series of formalae are derived for calculating exergic losses. Graphic analysis is made for the exergic efficiency of exergy. The results show that exergic losses and efficiency of the exchanger typified by parallel flow and counter flow vary with the number of transfer units (NTU) and water equivalence (W). By appropriate choice of the two parameters the maximum value of exergic efficiency may be obtained, and the design of a heat exchanger optimized. |
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| Keywords: | heat exchanger energy system exergic losses exergic efficiency number of transfer units water equivalence |
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