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Dynamic Modeling of Heat Exchangers With Humidity and Condensation

[+] Author Affiliations
Herschel Pangborn, Andrew G. Alleyne

University of Illinois at Urbana-Champaign, Urbana, IL

Paper No. DSCC2015-9646, pp. V003T39A001; 10 pages
doi:10.1115/DSCC2015-9646
From:
  • ASME 2015 Dynamic Systems and Control Conference
  • Volume 3: Multiagent Network Systems; Natural Gas and Heat Exchangers; Path Planning and Motion Control; Powertrain Systems; Rehab Robotics; Robot Manipulators; Rollover Prevention (AVS); Sensors and Actuators; Time Delay Systems; Tracking Control Systems; Uncertain Systems and Robustness; Unmanned, Ground and Surface Robotics; Vehicle Dynamics Control; Vibration and Control of Smart Structures/Mech Systems; Vibration Issues in Mechanical Systems
  • Columbus, Ohio, USA, October 28–30, 2015
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-5726-7
  • Copyright © 2015 by ASME

abstract

The effects of air humidity on the performance of refrigerant-to-air heat exchangers in vapor compression systems (VCSs) are non-negligible in modeling and control design for some applications. Such applications include both those in which the ambient humidity is expected to vary greatly over time and those in which control of the air outlet humidity is desired. This paper presents a control-oriented dynamic model for cross-flow refrigerant-to-air heat exchangers that uses knowledge of the air inlet humidity to improve the accuracy of refrigerant-side and air-side outputs, as well as to calculate the air outlet humidity and rate of condensate formation. Simulation results are validated with experimental data collected from a 1kW VCS test stand.

Copyright © 2015 by ASME

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