Publication

Flow Boiling and Pressure Drop Measurements for R134a/Oil Mixtures Part 2: Evaporating in a Plain Tube.

Daniel Favrat
1997
Reports

Abstract

Intube flow boiling experiments for refrigerant R-134a mixed with a lubricating oil are reported for a plain, horizontal tube. The tests were run at a nominal inlet pressure of 3.4 bar over a wide range of vapor qualities at mass velocities of 100, 200, and 300 kg/m2s (73.5, 147 and 220.5 thousands of lb/h ft2) for inlet oil concentrations from 0-5 wt.% oil. At low to intermediate vapor qualities (0.2

Official source

https://infoscience.epfl.ch/entities/publication/2bb71d94-7166-4238-af4e-a78aee1189a3

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Daniel Favrat
1997
Reports

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2bb71d94-7166-4238-af4e-a78aee1189a3

About this result

Related concepts (32)

Distillation

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation, usually inside an apparatus known as a still. Dry distillation is the heating of solid materials to produce gaseous products (which may condense into liquids or solids); this may involve chemical changes such as destructive distillation or cracking.

Heat transfer

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species (mass transfer in the form of advection), either cold or hot, to achieve heat transfer.

Boiling

Boiling is the rapid phase transition from liquid to gas or vapor; the reverse of boiling is condensation. Boiling occurs when a liquid is heated to its boiling point, so that the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere. Boiling and evaporation are the two main forms of liquid vapourization. There are two main types of boiling: nucleate boiling where small bubbles of vapour form at discrete points, and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapour forms on the surface.

Related publications (19)

Flow Boiling and Pressure Drop Measurements for R134a/Oil Mixtures Part 2: Evaporating in a Plain Tube.

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