0
Research Papers

Moving-Boundary Heat Exchanger Models With Variable Outlet Phase

[+] Author and Article Information
Brian D. Eldredge

 University of Illinois at Urbana-Champaign, 158 MEB, MC-244, 1206 West Green Street, Urbana, IL 61801brian.eldredge@gmail.com

Bryan P. Rasmussen

 Texas A&M University, 3123 TAMU, College Station, TX 77843-3123brasmussen@tamu.edu

Andrew G. Alleyne

 University of Illinois at Urbana-Champaign, 158 MEB, MC-244, 1206 West Green Street, Urbana, IL 61801alleyne@illinois.edu

J. Dyn. Sys., Meas., Control 130(6), 061003 (Sep 24, 2008) (12 pages) doi:10.1115/1.2977466 History: Received June 08, 2006; Revised May 22, 2008; Published September 24, 2008

Vapor compression cycle systems using accumulators and receivers inherently operate at or near a transition point involving changes of phase at the heat exchanger outlets. This work introduces a condenser/receiver model and an evaporator/accumulator model developed in the moving-boundary framework. These models use a novel extension of physical variable definitions to account for variations in refrigerant exit phase. System-level model validation results, which demonstrate the validity of the new models, are presented. The model accuracy is improved by recognizing the sensitivity of the models to refrigerant mass flow rate. The approach developed and the validated models provide a valuable tool for dynamic analysis and control design for vapor compression cycle systems.

Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 6

Mean void fraction for two-phase flows operating at 900kPa (condenser) and 320kPa (evaporator) as a function of the outlet quality

Grahic Jump Location
Figure 7

Photograph of the experimental system

Grahic Jump Location
Figure 8

Schematic of the experimental system

Grahic Jump Location
Figure 9

Condenser pressure

Grahic Jump Location
Figure 10

Condenser air outlet temperature

Grahic Jump Location
Figure 11

Evaporator pressure

Grahic Jump Location
Figure 12

Evaporator air outlet temperature

Grahic Jump Location
Figure 13

Evaporator superheat

Grahic Jump Location
Figure 14

Quality and pseudoquality calculated from the mean void fraction state

Grahic Jump Location
Figure 15

A compressor volumetric efficiency performance map showing experimentally obtained data (black points) and a least-squares fit surface modeling the data

Grahic Jump Location
Figure 16

Schematic of the mass flow dynamics isolation procedure

Grahic Jump Location
Figure 1

A basic vapor compression cycle with a receiver and an accumulator

Grahic Jump Location
Figure 2

Two possible steady-state operating conditions for a condenser with receiver

Grahic Jump Location
Figure 3

A possible transient operating condition for a condenser with receiver

Grahic Jump Location
Figure 4

Control volume for receiver model

Grahic Jump Location
Figure 5

Control volume for accumulator model

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In