ARTICLE:

• THERMAL PERFORMANCE EVALUATION OF A SPRAY TYPE EVAPORATOR USING ELEMENTAL NTU-ε METHOD  download article

Liang-Han Chien
Department of Air Conditioning and Refrigeration, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsaio E. Rd., Taipei 106, Taiwan

T.-H. Shih
Department of Air-conditioning and Refrigeration, National Taipei University of Technology, Taipei, Taiwan

ABSTRACT

This manuscript presents a computer solution methodology and the results for predicting spray type refrigerant evaporator performance. A computer code based on elemental NTU-ε method was developed. A falling film evaporation model based on the superposition model was used for the prediction of the refrigerant side heat transfer. The predictions of this model agree with experimental data of a R134a spray-type evaporator at various water temperatures and evaporator pressures. At a fixed condenser cooling water temperature, the evaporator performance increases as the saturation temperature increases. At a fixed condenser cooling water temperature, the evaporator performance increased as the chilled water temperature increased. At a fixed chilled water outlet temperature, the evaporator heat transfer rate reduced as the refrigerant inlet vapour quality increased with increasing condenser cooling water temperature.

 download article

HEX-27 pages

« Previous article         Next article »