Results 61 to 70 of about 104 (90)
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A global optimization method for evaporative cooling systems based on the entransy theory
Energy, 2012Evaporative cooling technique, one of the most widely used methods, is essential to both energy conservation and environment protection. This contribution introduces a global optimization method for indirect evaporative cooling systems with coupled heat and mass transfer processes based on the entransy theory to improve their energy efficiency.
Fang Yuan, Qun Chen
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Analyses of an air conditioning system with entropy generation minimization and entransy theory
Chinese Physics B, 2016In this paper, based on the generalized heat transfer law, an air conditioning system is analyzed with the entropy generation minimization and the entransy theory. Taking the coefficient of performance (denoted as COP) and heat flow rate Q out which is released into the room as the optimization objectives, we discuss the applicabilities of the entropy ...
Yan-Qiu Wu, Li Cai, Hong-Juan Wu
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An integrated optimization for organic Rankine cycle based on entransy theory and thermodynamics
Energy, 2014Abstract The organic Rankine cycle has been one of the essential heat-work conversion technologies nowadays. Lots of effectual optimization methods are focused on the promotion of the system efficiency, which are mainly relied on engineering experience and numerical simulations rather than theoretical analysis.
Tailu Li, Wencheng Fu, Jialing Zhu
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Performance Analysis of the Absorption Heat Pump Systems Based on the Entransy Theory
Applied Mechanics and Materials, 2014The entransy efficiency expression of the absorption heat pump systems was defined in this paper, combined with the concept of the entransy and based on the model of a four temperature level absorption heat pump cycle. The relationship between the heating coefficient of the absorption heat pump and heating rate with the changes of the entransy ...
Qi Zhao, Chen Wang, Feng Yi Han
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The Application of Entransy Dissipation Theory in the Volume-to-Point Heat Conduction Problem
2010 14th International Heat Transfer Conference, Volume 3, 2010Recent advances in semiconductor technologies are accompanied by an accelerated increase in power density level from high performance chips such as microprocessors. The thermal management of electronic devices, especially meeting the limitations on maximum operating temperature and ensuring temperature uniformity across the chip, becomes one of the ...
Liang Ge, Mingtian Xu, Lin Cheng
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Generalized constructal optimization of strip laminar cooling process based on entransy theory
Science China Technological Sciences, 2016A strip laminar cooling process is investigated in this paper. Entransy theory and generalized constructal optimization are introduced into the optimization. Total water flow amount (WFA) in the laminar cooling zone (LCZ) and complex function are taken as the constraint and optimization objective, respectively. The entransy dissipation (ED) and maximum
HuiJun Feng +4 more
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International Journal of Heat and Mass Transfer, 2012
Abstract Mass reduction strongly contributes to reduce the cost and promote the performance of spacecrafts. During the design of spacecrafts, mass minimization for the heat exchanger networks (HENs) is a fundamental and attractive issue for which series of global optimization methods based on numerical simulation have been applied. However, among the
Yun-Chao Xu, Qun Chen
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Abstract Mass reduction strongly contributes to reduce the cost and promote the performance of spacecrafts. During the design of spacecrafts, mass minimization for the heat exchanger networks (HENs) is a fundamental and attractive issue for which series of global optimization methods based on numerical simulation have been applied. However, among the
Yun-Chao Xu, Qun Chen
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ASME 2012 6th International Conference on Energy Sustainability, Parts A and B, 2012
In order to reduce the consumption of energy and material, the optimization design of the refrigeration systems, especially the minimization for the total area of the heat exchangers, has been an attractive but tough issue in both research and engineering fields.
Qun Chen, Yun-Chao Xu
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In order to reduce the consumption of energy and material, the optimization design of the refrigeration systems, especially the minimization for the total area of the heat exchangers, has been an attractive but tough issue in both research and engineering fields.
Qun Chen, Yun-Chao Xu
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Science China Technological Sciences, 2016
A model of non-uniform height rectangular fin, in which the variation of base’s thickness and width are taken into account, is established in this paper. The dimensionless maximum thermal resistance (DMTR) and the dimensionless equivalent thermal resistance (DETR) defined based on the entransy dissipation rate (EDR) are taken as performance evaluation ...
AiBo Yang +4 more
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A model of non-uniform height rectangular fin, in which the variation of base’s thickness and width are taken into account, is established in this paper. The dimensionless maximum thermal resistance (DMTR) and the dimensionless equivalent thermal resistance (DETR) defined based on the entransy dissipation rate (EDR) are taken as performance evaluation ...
AiBo Yang +4 more
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Generalized thermal resistance and its application to thermal radiation based on entransy theory
International Journal of Heat and Mass Transfer, 2013Abstract Entransy is a novel concept developed in recent years to measure the transport ability of heat in heat transfer processes. In order to analyze and optimize thermal radiation process more conveniently and intuitively, we develop the entransy-theory-based method to the field of thermal radiation problems to define the generalized thermal ...
Jing Wu, Xuetao Cheng
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