Results 91 to 100 of about 5,379,536 (128)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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.
Xingang Liang, Xuetao Cheng
exaly +2 more sources
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.
Xingang Liang, Xuetao Cheng
exaly +2 more sources
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
openaire +1 more source