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科学通报  2012 

传热学中的状态图及其应用

, PP. 2771-2777

Keywords: 传热学,状态图,不可逆性,(火积)耗散,优化

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Abstract:

鉴于热力学状态图能够直观分析热力循环的性能,提出热流是热量运动的状态量,明确了相应的热量运动状态方程,并引入传热学中的二维状态图T-q图,它可以从传热过程不可逆性的角度直观分析传热过程的性能,便于换热设备及其系统的优化分析和工程设计.利用传热学中的状态图,分析换热器可以直观得出换热面积、流体热容量流和流动形式对其传热性能的影响;分析集中供暖系统中的换热器网络可以方便得出当每条支路的总换热量以及室内空气温度都相等时,每条支路所需的总换热面积、热水流量以及回水温度都相等,但当各支路中的室内空气温度不一致时,经过换热支路后的热水温度并不相同,这就意味着等温回水混合过程并非获得最优供热管网设计的必需条件.

References

[1]  1 曾丹苓, 敖越, 张新铭, 等. 工程热力学. 第3版. 北京: 高等教育出版社, 2002
[2]  2 朱明善, 刘颖, 林兆庄, 等. 工程热力学. 北京: 清华大学出版社, 1995
[3]  4 刘桂玉, 刘志刚, 阴建民, 等. 工程热力学. 北京: 高等教育出版社, 1998
[4]  5 Guo Z Y, Zhu H Y, Liang X G. Entransy—A physical quantity describing heat transfer ability. Int J Heat Mass Transf, 2007, 50: 2545-2556??
[5]  6 Chen L G, Wei S H, Sun F R. Constructal entransy dissipation minimization for ‘volume-point’ heat conduction. J Phys D-Appl Phys, 2008, 41: 195506??
[6]  7 Chen Q, Zhu H Y, Pan N, et al. An alternative criterion in heat transfer optimization. Porc R Soc A-Math Phys Eng Sci, 2011, 467: 1012-1028??
[7]  10 Chen Q, Ren J X, Meng J A. Field synergy equation for turbulent heat transfer and its application. Int J Heat Mass Transf, 2007, 50: 5334-5339??
[8]  11 陈群, 任建勋. 对流换热过程的广义热阻及其与 耗散的关系. 科学通报, 2008, 53: 1730-1736
[9]  12 Chen Q, Wang M R, Pan N, et al. Optimization principles for convective heat transfer. Energy, 2009, 34: 1199-1206??
[10]  14 Liu W, Liu Z C, Jia H, et al. Entransy expression of the second law of thermodynamics and its application to optimization in heat transfer process. Int J Heat Mass Transf, 2011, 54: 3049-3059??
[11]  15 Cheng X T, Liang X G. Entransy flux of thermal radiation and its application to enclosures with opaque surfaces. Int J Heat Mass Transf, 2011, 54: 269-278??
[12]  16 Chen Q, Yang K D, Wang M, et al. A new approach to analysis and optimization of evaporative cooling system I: Theory. Energy, 2010, 35: 2448-2454??
[13]  18 Liu X, Guo Z Y. A novel method for heat exchanger analysis. Acta Phys Sin, 2009, 58: 4766-4771
[14]  19 Chen L, Chen Q, Li Z, et al. Optimization for a heat exchanger couple based on the minimum thermal resistance principle. Int J Heat Mass Transf, 2009, 52: 4778-4784??
[15]  22 Xu Y C, Chen Q. An entransy dissipation-based method for global optimization of district heating networks. Energ Buildings, 2012, 48: 50-60??
[16]  23 Yuan F, Chen Q. A global optimization method for evaporative cooling system based on the entransy theory. Energy, 2012, 42: 181-191??
[17]  25 Cao B Y, Guo Z Y. Equation of motion of phonon gas and non-Fourier heat conduction. J Appl Phys, 2007, 102: 053503??
[18]  3 沈维道, 蒋智敏, 童钧耕, 等. 工程热力学. 第3版. 北京: 高等教育出版社, 2001
[19]  8 Chen L G, Wei S H, Sun F R. Constructal entransy dissipation rate minimization of a disc. Int J Heat Mass Transf, 2011, 54: 210-216??
[20]  9 Meng J A, Liang X G, Chen Z J, et al. Experimental study on convective heat transfer in alternating elliptical axis tubes. Exp Therm Fluid Sci, 2005, 29: 457-465??
[21]  13 Chen Q, Meng J A. Field synergy analysis and optimization of the convective mass transfer in photocatalytic oxidation reactors. Int J Heat Mass Transf, 2008, 51: 2863-2870??
[22]  17 Chen Q, Pan N, Guo Z Y. A New Approach to analysis and optimization of evaporative cooling system II: Applications. Energy, 2011, 36: 2890-2898??
[23]  20 Qian X D, Li Z, Li Z X. Entransy-dissipation-based thermal resistance analysis of heat exchanger networks. Chin Sci Bull, 2011, 56: 3289-3295??
[24]  21 Chen Q, Xu Y C. An entransy dissipation-based optimization principle for building central chilled water systems. Energy, 2012, 37: 571-579??
[25]  24 Incropera F, Dewitt D. Introduction to Heat Transfer. New York: John Wiley & Sons Inc., 1985

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