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COP Prediction of an ejector refrigeration cycle combined with a vapour compression cycle for automotive air conditioning
This paper presents the COP prediction of an ejector refrigeration cycle combined with a vapourcompression cycle for automotive air conditioning. Using computational fluid dynamics (CFD) technique, theperformance of an ejector was analyzed in term of the entrainment ratio (Rm) and critical back pressure(CBP). The results from this study were compared with a previous study of combined ejector refrigerationsystem for automotive air conditioning application [1] which the entrainment ratio (Rm) were predicted fromone-dimensional (1-D) equation. The performance of an ejector (Rm and CBP) from CFD and onedimensionalmethod were analyzed and used as database for a mathematical modeling. In order to predictthe COP of the combined system, a set of mathematical equations was developed using EES. The operatingconditions are chosen accordingly as, intercooler temperature between 15 ๐C and 25 ๐C, condensertemperature equal to 35 ๐C and evaporator temperature equal to 5 ๐C. However, when generatortemperatures are 80 ๐C, 85 ๐C and 90 ๐C, the results showed average relative errors of the COP of an ejectorrefrigeration cycle (COPej), between CFD and 1-D are 44.64%, 50.47% and 59.68% respectively, andbetween CFD and 1-D NEW are 1.54%, 0.08% and 6.49% respectively.
COP Prediction of an ejector refrigeration cycle combined with a vapour compression cycle for automotive air conditioning
This paper presents the COP prediction of an ejector refrigeration cycle combined with a vapourcompression cycle for automotive air conditioning. Using computational fluid dynamics (CFD) technique, theperformance of an ejector was analyzed in term of the entrainment ratio (Rm) and critical back pressure(CBP). The results from this study were compared with a previous study of combined ejector refrigerationsystem for automotive air conditioning application [1] which the entrainment ratio (Rm) were predicted fromone-dimensional (1-D) equation. The performance of an ejector (Rm and CBP) from CFD and onedimensionalmethod were analyzed and used as database for a mathematical modeling. In order to predictthe COP of the combined system, a set of mathematical equations was developed using EES. The operatingconditions are chosen accordingly as, intercooler temperature between 15 ๐C and 25 ๐C, condensertemperature equal to 35 ๐C and evaporator temperature equal to 5 ๐C. However, when generatortemperatures are 80 ๐C, 85 ๐C and 90 ๐C, the results showed average relative errors of the COP of an ejectorrefrigeration cycle (COPej), between CFD and 1-D are 44.64%, 50.47% and 59.68% respectively, andbetween CFD and 1-D NEW are 1.54%, 0.08% and 6.49% respectively.
COP Prediction of an ejector refrigeration cycle combined with a vapour compression cycle for automotive air conditioning
Suvarnakuta, Natthariya (Autor:in) / Keerlatiyadatanapat, Nutthanun (Autor:in) / Sriveerakul, Thanarath (Autor:in)
22.09.2014
Engineering and Applied Science Research; Vol 41 No 1 (2014); 39-51 ; 2539-6218 ; 2539-6161
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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