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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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Performance optimization of two-stage latent heat storage unit based on entransy theory
International Journal of Heat and Mass Transfer, 2014Abstract In order to enhance the performance of the latent heat storage (LHS) process and provide the criterion for the selection and match of the multistage PCMs, the effects of PCMs melting temperatures on the heat storage rate, entransy dissipation rate and heat storage quality were numerically analyzed based on the entransy theory. For the single
Y.B. Tao, Y.L. He, Y.K. Liu, W.Q. Tao
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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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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.
HuiJun Feng +3 more
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International Journal of Heat and Mass Transfer, 2018
Abstract The entropy generation minimization and the entransy theory are widely used in the optimization of heat transfer. In this paper, the two theories are applied to coupled steady heat transfer systems. The two different definitions of radiative entransy flux are discussed.
XueTao Cheng, XinGang Liang
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Abstract The entropy generation minimization and the entransy theory are widely used in the optimization of heat transfer. In this paper, the two theories are applied to coupled steady heat transfer systems. The two different definitions of radiative entransy flux are discussed.
XueTao Cheng, XinGang Liang
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Energy, 2013
The vapor-compression refrigeration systems have been one of the essential energy conversion systems for humankind and exhausting huge amounts of energy nowadays. Surrounding the energy efficiency promotion of the systems, there are lots of effectual optimization methods but mainly relied on engineering experience and computer simulations rather than ...
Yun-Chao Xu, Qun Chen
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The vapor-compression refrigeration systems have been one of the essential energy conversion systems for humankind and exhausting huge amounts of energy nowadays. Surrounding the energy efficiency promotion of the systems, there are lots of effectual optimization methods but mainly relied on engineering experience and computer simulations rather than ...
Yun-Chao Xu, Qun Chen
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A new mathematical model for multi-scale thermal management of data centers using entransy theory
Building Simulation, 2018Based on entransy theory, this paper proposes a new mathematical model for multi-scale data center thermal management. A comparison of heat transfer optimizing is made first, using exergy/entropy method and entransy dissipation, to verify the fitness of entransy theory.
Hao Tian, Hang Liang, Zhen Li
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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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Energy, 2012
Abstract In the present work, a multi-parameter optimization approach of Isopropanol–Acetone–Hydrogen (IAH) chemical heat pump is developed based on the entransy theory. In the optimization process, the total low-temperature heat consumed by the heat pump system generally decreases while the high-temperature heat recovered by the heat pump increases ...
Jiangfeng Guo, Xiulan Huai
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Abstract In the present work, a multi-parameter optimization approach of Isopropanol–Acetone–Hydrogen (IAH) chemical heat pump is developed based on the entransy theory. In the optimization process, the total low-temperature heat consumed by the heat pump system generally decreases while the high-temperature heat recovered by the heat pump increases ...
Jiangfeng Guo, Xiulan Huai
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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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