Heat transfer characteristics of the concentric disk inside the WFRD evaporator for the VPCAR water recovery system

W. Duval*, N. Hall, J. MacKey, D. Althausen, A. Izadnegahdar, E. Litwiller, M. Flynn

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We consider the heat transfer characteristics of an ideal concentric disk used in the Wiped-Film Rotating-Disk (WFRD) evaporator for the Vapor Phase Catalytic Ammonia Removal (VPCAR) water recovery system. A mathematical model is derived to predict the radial temperature distribution and its average over the surface of the disk as a function of system parameters. The model shows self-similarity of the temperature distribution and the existence of a dimensionless parameter S (ratio of heat flux to convection) that can be used as a criterion to optimize the thermal characteristics of the disk in order to approach uniform surface temperature. Comparison of the model to experimental data using global (infrared imager) and local (resistive temperature devices) measurements shows that agreement with the model depends on the ambient condition denoted by the local heat transfer coefficient. The predictive capability of the model provides a rational basis for the design of a low-gravity experiment to investigate the effect on input heat flux on the evaporation of a thin liquid film.

Original languageEnglish (US)
Title of host publicationInternational Conference on Environmental Systems, ICES 2009
DOIs
StatePublished - 2009
Externally publishedYes
EventInternational Conference on Environmental Systems, ICES 2009 - Savannah, GA, United States
Duration: Jul 12 2009Jul 12 2009

Other

OtherInternational Conference on Environmental Systems, ICES 2009
CountryUnited States
CitySavannah, GA
Period07/12/0907/12/09

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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