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The influence of return bends on the downstream pressure drop and condensation heat transfer in tubes

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dc.contributor.author Traviss, Donald P. en_US
dc.contributor.author Rohsenow, Warren M. en_US
dc.contributor.other Massachusetts Institute of Technology. Division of Sponsored Research. en_US
dc.contributor.other Massachusetts Institute of Technology. Dept. of Mechanical Engineering. en_US
dc.contributor.other Massachusetts Institute of Technology. Heat Transfer Laboratory. en_US
dc.date.accessioned 2011-03-04T23:40:16Z
dc.date.available 2011-03-04T23:40:16Z
dc.date.issued 1971 en_US
dc.identifier 14120954 en_US
dc.identifier.uri http://hdl.handle.net/1721.1/61502
dc.description.abstract The influence of return bends on the downstream pressure drop and heat transfer coefficient of condensing refrigerant R-12 was studied experimentally. Flow patterns in glass return bends of 1/2 to 1 in. radius and 0.315 in. I. D. were examined visually and photographically using a high frequency xenon light source. Local pressure drop and heat transfer measurements were made along a horizontal 14 1/2 ft. test section immediately following the return bend. The refrigerant mass flux ranged from 1.32 X 105 to 4.58 X 105 lbm/hr-ft 2, saturation temperature from 90 to 107*F, and return bend quality from 0.24 to 1.0. The pressure drop and heat transfer data were compared to previous data for condensation without return bends. Effects on the downstream pressure drop and heat transfer were found to be small, if not negligible. en_US
dc.description.sponsorship Sponsored by Technical Committee 1.3, American Society of Heating, Refrigeration, and Air Conditioning Engineers DSR Project en_US
dc.format.extent 77 p en_US
dc.publisher Cambridge, Mass. : M.I.T. Heat Transfer Laboratory, [1971] en_US
dc.relation.ispartofseries Technical report (Massachusetts Institute of Technology, Heat Transfer Laboratory) ; no. 75. en_US
dc.subject Heat -- Transmission. en_US
dc.subject Refrigerants. en_US
dc.subject Condensation. en_US
dc.subject Tubes -- Fluid dynamics. en_US
dc.title The influence of return bends on the downstream pressure drop and condensation heat transfer in tubes en_US
dc.type Technical Report en_US


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