Modeling study on two-phase adiabatic expansion in a reciprocating expander
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- 作者：Hiroshi Kanno
- 关键词：Two-phase flow ; Adiabatic expansion ; Indicated adiabatic efficiency ; Boiling ; Heat transfer
- 刊名：International Journal of Heat and Mass Transfer
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：104
- 期：Complete
- 页码：142-148
- 全文大小：889 K
文摘
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Heat transfer coefficient from the liquid bulk to the gas–liquid interface is correlated as a Nusselt number which is expressed as a function of Prandtl, Reynolds and Bond numbers.
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Using the correlated Nusselt number, the energy balance equations are solved to predict the pressure change and the indicated adiabatic efficiency during two phase adiabatic expansion.
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The model predicts the indicated adiabatic efficiency within about 5% accuracy.
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The model indicates that the degradation of the indicated adiabatic efficiency is mainly due to the insufficient heat transfer from the liquid bulk to the interface.