Publication

Evaporation in Microfin Tubes: A Generalized Prediction Model.

Daniel Favrat
1999
Conference Papers

Abstract

A new flow boiling model and generalized correlation are presented for evaporation inside of horizontal microfin tubes. The enhancement model incorporates the effects of the microfins on liquid-phase convection and nucleate boiling. The method predicts microfin test data for R-134a and R-123 over the mass velocity range from 100-500 kg/m2s, vapor qualities from 15- 85% and heat fluxes from 2-47 kW/M2. The model is the first general type of method to become available and can be applied to any 2-dimensional microfin geometry and fluid of interest, without resort to fluid specific or microfin specific empirical constats. More work is required to compare the model to independent test data and other fluids and microfin geometries.

Official source

https://infoscience.epfl.ch/entities/publication/0d76aa71-f020-49de-859e-c46150f93162

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Daniel Favrat
1999
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/0d76aa71-f020-49de-859e-c46150f93162

About this result

Related concepts (32)

Critical heat flux

In the study of heat transfer, critical heat flux (CHF) is the heat flux at which boiling ceases to be an effective form of transferring heat from a solid surface to a liquid. Boiling systems are those in which liquid coolant absorbs energy from a heated solid surface and undergoes a change in phase. In flow boiling systems, the saturated fluid progresses through a series of flow regimes as vapor quality is increased. In systems that utilize boiling, the heat transfer rate is significantly higher than if the fluid were a single phase (i.

Nucleate boiling

In fluid thermodynamics, nucleate boiling is a type of boiling that takes place when the surface temperature is hotter than the saturated fluid temperature by a certain amount but where the heat flux is below the critical heat flux. For water, as shown in the graph below, nucleate boiling occurs when the surface temperature is higher than the saturation temperature (TS) by between . The critical heat flux is the peak on the curve between nucleate boiling and transition boiling.

Evaporator

An evaporator is a device used to turn a liquid into a gas. Some air conditioners and refrigerators use compressed liquids with a low boiling point that vaporizes within the system to cool it, whilst emitting the thermal energy into its surroundings. Evaporators are often used to concentrate a solution. One example is the climbing/falling film plate evaporator, which is used to make condensed milk. Similarly, reduction (cooking) is a process of evaporating liquids from a solution to produce a "reduced" food product, such as wine reduction.

Related publications (23)

Evaporation in Microfin Tubes: A Generalized Prediction Model.

Chat with Graph Search

Nanoelectronic devices comprising patterned thin films and method for producing the same

Nanoelectronic devices comprising patterned thin films and method for producing the same

Heat transfer modeling and waste heat management in the furnaces of secondary aluminum production