International Journal of Power and Energy Research

Download PDF (831.5 KB) PP. 131 - 138 Pub. Date: July 25, 2017

DOI: 10.22606/ijper.2017.12005

• Minhhung Doan^*
  Department of Thermal Engineering, HCMC University of Technology and Education, Vietnam
• Thaison Le
  
  Department of Thermal Engineering, HCMC University of Technology and Education, Vietnam
• Thanhtrung Dang^*
  
  Department of Thermal Engineering, HCMC University of Technology and Education, Vietnam
• Jyh-tong Teng
  
  Department of Mechanical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan

The heat transfer characteristics of a microchannel condenser in the phase change from the vapor phase to the liquid phase depend on many factors such as the physical parameters of the working fluid, the cooling fluid, etc. In this paper, the numerical results are clearly presented for the condensation profile, the density change, and the temperature of condensed water. Based on the results in this study, a function was suggested for predicting a relationship between the temperature of condensed water and the mass flow rate of steam from 0.01 g/s to 0.1 g/s. Moreover, the results of numerical simulation are in good agreement with the experimental data. In addition, the results showed that the condensation profile is not strongly affected the gravitational force.

Micro channels, heat transfer, temperature profile, condensation, steam.

[1] Asadi et al, “A review of heat transfer and pressure drop characteristics of single and two-phase microchannels”, International Journal of Heat and Mass Transfer 79 (2014) 34-53.

[2] Xia et al, “Investigation of the enhancement effect of heat transfer using micro channel”, The 7th International Conference on Applied Energy ICAE2015.

[3] T.T. Dang and J. T. Teng, “Comparisons of the heat transfer and pressure drop of the microchannel and minichannel heat exchangers”, Heat Mass Transfer 47 (2011) 1311-1322.

[4] T.T. Dang et al, “A study on the simulation and experiment of a microchannel counter-flow heat exchanger”Applied Thermal Engineering 30 (2010) 2163-2172.

[5] T.T. Dang et al, “Numerical and Experimental investigations for effect of gravity to the heat transfer and fluid flow phenomena of microchannel heat exchangers”, Applied International Journal of Computational Engineering Research 2 (2012) 260-270.

[6] X.F Yu et al, “A study on the hydraulic and thermal characteristics in fractal tree-like microchannels by numerical and experimental methods “, International Journal of Heat and Mass Transfer 55 (2012) 7499-7507.

[7] M. Fossa, “A simple model to evaluate direct contact heat transfer and flow characteristics in annular two-phase flow”, 655 Avenue of the Americas, New York, NY 10010.

[8] H.G. Hu and C. Zhang, A modified k-ε turbulence model for the simulation of two-phase flow and heat transfer in condensers, International Journal of Heat and Mass Transfer, 50 (2007) 1641-1648.

[9] X. Ding, W. Cai, P. Duan, and J. Yan, Hybrid dynamic modeling for two phase flow condensers, Applied Thermal Engineering 62 (2014) 830-837.

[10] P. Mirzabeygi and C. Zhang, Three dimensional numerical model for the two phase flow and heat transfer in condensers, International Journal of Heat and Mass Transfer 81 (2015) 618-637.

[11] P. Mirzabeygi and C. Zhang, Turbulence modeling for the two phase flow and heat transfer in condensers, International Journal of Heat and Mass Transfer 89 (2015) 229-241.

[12] S.Chen, Z. Yang, Y. Duan, Y. Chen, and D. Wu, Simulation of condensation flow in a rectangular microchannel, Chemical Engineering and Processing 76 (2014) 60-69.

[13] K.Ling, G.Son, D.L Sun, and W.Q. Tao, Three dimensional numerical simulation on bubble growth and merger in microchannel boiling flow, International Journal of Thermal Science 98 (2015) 135-147.

[14] Hicham El Mghari, Mohamed Asbik, Hasna Louahlia-Gualous, Ionut Voicu, Condensation heat transferenhancement in a horizontal non-circularmicrochannel, Applied Thermal Engineering 64 (2014) 358-370.

[15] COMSOL Multiphysics, Heat transfer Module User’s Guide, Chapter 4 -Theory for the heat transfer module, COMSOL 5.2a.

[16] Minhhung Doan and Thanhtrung Dang, An experimental investigation on condensation in horizontal microchannels, International Journal of Civil, Mechanical and Energy Science 2 (2016) 99-106.