Results 51 to 60 of about 104 (90)
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Constructal optimization for H-shaped multi-scale heat exchanger based on entransy theory
Science China Technological Sciences, 2012Analogizing with the definition of thermal efficiency of a heat exchanger, the entransy dissipation efficiency of a heat exchanger is defined as the ratio of dimensionless entransy dissipation rate to dimensionless pumping power of the heat exchanger.
Lingen Chen, Feng Huijun, Chen Lingen
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The application of entransy dissipation theory in optimization design of heat exchanger
Applied Thermal Engineering, 2012Jiangfeng Guo
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Application of entransy dissipation theory in heat convection
Frontiers of Energy and Power Engineering in China, 2009In the present work, formulas for calculating the rates of the local thermodynamic entransy dissipation in convective heat transfer in general, and the internal and external flows in particular, are established. Practically, these results may facilitate the application of entransy dissipation theory in thermal engineering. Theoretically they shed light
Mingtian Xu, Jiangfeng Guo, Lin Cheng
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Analyses of the endoreversible Carnot cycle with entropy theory and entransy theory
Chinese Physics B, 2013The endoreversible Carnot cycle is analyzed based on the concepts of entropy generation, entropy generation number, entransy loss, and entransy loss coefficient. The relationships of the cycle output power and heat-work conversion efficiency with these parameters are discussed.
Wen-Hua Wang +2 more
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Optimization of fin geometry in heat convection with entransy theory
Chinese Physics B, 2013The entransy theory developed in recent years is used to optimize the aspect ratio of a plate fin in heat convection. Based on a two-dimensional model, the theoretical analysis shows that the minimum thermal resistance defined with the concept of entransy dissipation corresponds to the maximum heat transfer rate when the temperature of the heating ...
Xue-Tao Cheng +3 more
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Fundamentals of Entransy and Entransy Dissipation Theory
2014The entransy is a new developed parameter that is effective in optimization of heat transfer. It can be used as an evaluation of the transport ability of heat. In this chapter, based on the energy conservation equation, the entransy balance equations for heat conduction and convective heat transfer are developed.
Junjie Gu, Zhongxue Gan
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Application of Entransy Theory in Thermal Storage System
2014There are many possible capsule and tank geometry types and arrangements. It is very helpful to assess the performance of capsule arrangements, shapes, and flow field configurations. For this purpose, a general tool will be needed to assess the heat transfer which takes place between the capsules and the HTF and evaluate how efficient the process is ...
Junjie Gu, Zhongxue Gan
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Application of Entransy Theory in Absorption Refrigeration System
2014In this chapter, energy and entransy analyses are applied to a single stage absorption refrigeration system, the entransy dissipation rate and entransy-dissipation based thermal resistance rate of each component, as well as the system performance on a series of operating conditions, are calculated.
Junjie Gu, Zhongxue Gan
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Constructal study on a cylindrical heat source based on entransy theory
Chinese Science Bulletin, 2014基于构形理论和(火积)理论, 以当量热阻为目标对层流冷却条件下的圆柱体热源进行构形研究, 分析热源直径和导热系数对其传热性能的影响. 结果表明: 在热源体积一定的条件下, 不存在最佳热源直径使得其当量热阻取得最小值. 随着热源直径的减小、导热系数的增大, 热源当量热阻减小, 此时热源系统的整体传热性能得到提高. 此外, 圆柱体热源表面温度沿来流方向逐渐增大, 且其表面换热系数沿来流方向逐渐减小. 本文所得结果对热源的优化设计有一定的参考价值.
LinGen CHEN +4 more
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The Application of Entransy Dissipation Theory in Optimization Design of Heat Exchanger
2010 14th International Heat Transfer Conference, Volume 4, 2010The heat conduction and fluid friction are two main detrimental irreversibilities in heat exchanger. According to the entransy dissipation theory, the entransy dissipation can be employed to quantify these two irreversibilities. In the present work, the optimization of heat exchanger design is investigated by applying the entransy dissipation theory ...
Jiangfeng Guo +3 more
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