Publication: Research - peer-review › Article in proceedings – Annual report year: 2009
Refrigerant mal-distribution in fin-and-tube evaporators for residential air-conditioning (RAC) is investigated numerically in this paper. A model of the system is developed in the object-oriented modeling language Modelica. Themodels of the compressor and expansion valve are static, whereas the condenser is a dynamic moving boundary model. The evaporator model is a dynamic distributed one-dimensional homogeneous equilibrium model, in order to capture the distribution phenomena. Fin-and-tube heat exchangers usually have a complex circuitry, however the evaporator will be simplified to be two straight tubes. The refrigerant mal-distribution is then induced to the evaporator by varying the vapor quality at the inlet to each feeder tube, the pressure drop through each feeder tube and the air-flow across each tube. Finally it is shown that air-flow mal-distribution can be compensated by an intelligent distributor, that ensures equal superheat in both tubes. The refrigerant is R410a.
|Title of host publication||Proceedings of SIMS 50 : Modeling of Energy Technology|
|Place of publication||Kgs. Lyngby|
|Publisher||Technical University of Denmark|
|Conference||50th International Conference of Scandinavian Simulation Society|
|Period||07/10/09 → 08/10/09|
- Air-conditioning, Evaporator, Modelica, Mal-distribution, Modeling
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