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Two-phase frictional pressure drop of 1,1-difluoroethane in a horizontal tube

Gong Mao-Qiong Shen Jun Wu Jian-Feng Chen Gao-Fei Zou Xin

Two-phase frictional pressure drop of 1,1-difluoroethane in a horizontal tube

Gong Mao-Qiong, Shen Jun, Wu Jian-Feng, Chen Gao-Fei, Zou Xin
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Publishing process
  • Received Date:  12 May 2010
  • Accepted Date:  11 August 2010
  • Published Online:  05 June 2010

Two-phase frictional pressure drop of 1,1-difluoroethane in a horizontal tube

  • 1. (1)Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (2)Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Abstract: This paper deals with an experimental investigation of two-phase frictional pressure drop behavior of 1,1-difluoroethane in an 8 mm inside-diameter smooth horizontal tube. Pressure drop characteristics are measured in a pressure range of 0.19—0.41 MPa, heat flux range of 14—62 kW/m2, and mass flux range of 128—200 kg/m2s. The effects of experimental parameters on pressure drop are analyzed. It is found that with the increases of mass flow and vapor quality, the frictional pressure drop increases. The proportion of momentum pressure drop in the total pressure drop increases slightly as heat flux increases, and accordingly the proportion of the frictional pressure drop decreases. The frictional pressure drop increases with saturation pressure decreasing. Experimental results are compared with the calculations from the two extensively used correlation formulae. Our investigations show that the Friedel model has a relatively large deviation, and the Müller-Steinhagen-Heck model accords well with the experimental results.

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