Abstract
This paper presents an advanced switched modeling approach for vapor compression cycle (VCC) systems used in Air Conditioning and Refrigeration. Building upon recent work (McKinley and Alleyne, 2008), a complete dynamic VCC model is presented that is able to describe the severe transient behaviors in heat exchangers (condenser/evaporator), while maintaining the moving-boundary framework, under compressor shut-down and start-up operations. The heat exchanger models retain a constant structure, but accommodate different model representations. Novel switching schemes between different representations and pseudo-state variables are introduced to accommodate the transitions of dynamic states in heat exchangers while keeping track of the vapor and liquid refrigerant zones during the stop-start transients. Two model validation studies on an experimental system show that the complete dynamic model developed in Matlab/Simulink can well predict the system dynamics in shut-down and start-up transients.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 538-552 |
| Number of pages | 15 |
| Journal | International Journal of Refrigeration |
| Volume | 33 |
| Issue number | 3 |
| DOIs | |
| State | Published - May 2010 |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors wish to thank the financial support of the sponsoring companies of the Air Conditioning and Refrigeration Center at the University of Illinois at Urbana-Champaign, and also thank Neera Jain and Tom McKinley for providing useful suggestions for the manuscript preparations.
Keywords
- Comparison
- Compression system
- Condenser
- Evaporator
- Experiment
- Heat exchanger
- Modelling
- Pressure
- Refrigeration system
- Régulation
- Simulation
- Transient state