Index Catalog // ScholarsArchive@OSU

Creator:: Jacob, Tabeel A., Matty, Ethan P., and Fronk, Brian M.
Abstract:: The objective of this paper was to measure and compare the heat transfer coefficient and pressure drop of R404A and two potential replacement candidate refrigerants with a lower global warming potential, R448A and R452A. Experiments were conducted inside a 4.7 mm horizontal tube at mass fluxes ranging from 100 to...
Resource Type:: Article
Full Text:: P. Matty, Brian M. Fronk 1 School of Mechanical, Industrial and Manufacturing Engineering Oregon

Creator:: Jacob, Tabeel A., Matty, Ethan P., and Fronk, Brian M.
Abstract:: Heat transfer coeﬃcients and frictional pressure drop values are experimentally measured during condensation of R134a and its proposed low global warming potential (GWP) replacement, R450A. R450A is a non-ﬂammable zeotropic mixture of R134a and R1234ze (42/58% by mass). Experiments were conducted in a horizontal tube (ID = 4.7 mm) for...
Resource Type:: Article
Full Text:: Refrigerant R450A using a Fiber Optic Distributed Temperature Sensor Tabeel A. Jacob, Ethan P Matty, Brian M

Creator:: Vanderputten, Michael A., Jacob, Tabeel A., Sattar, Maria, Ali, Nouman, and Fronk, Brian M.
Abstract:: Qualitative two-phase flow regime data are obtained from high-speed visualization of condensing flows of R-134a at mass fluxes from 75 to 150 kg m−2 s−1 and quality from 0.1 to 0.8 in square microchannels (DH = 0.84 mm) cooled from a single side. Superheated R-134a is distributed into multiple parallel microchannels and then partially condensed, using...
Resource Type:: Article
Full Text:: -1 K-1) D Diameter (m) DH Hydraulic diameter (m) Fr Froude number (-) g Acceleration

Creator:: Jacob, Tabeel A. and Fronk, Brian M.
Abstract:: This article investigates the in-tube, superheated, saturated, and subcooled condensation of zeotropic refrigerant mixture R454C. R454C is proposed to replace R404A for commercial refrigeration applications. Quasi-local heat transfer coefficients were measured in a 4.7 mm horizontal tube at mass fluxes ranging from 100 to 500 kg m−2 s−1 at three different saturation...
Resource Type:: Article
Full Text:: sensible heat load over the total heat load ( ,s v TQ Q  ) is estimated as: ,, p v glides v T lv xc

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