The analysis of thermal and flow characteristics of the condensation of refrigerant zeotropic mixtures in minichannels

Archives of Thermodynamics

Katarzyna WidomskaTechnical University of Koszalin, Department of Heat and Refigeration Engineering, Rac?awicka 15-17, 75-620 Koszalin, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Tadeusz BohdalCorresponding authorTechnical University of Koszalin, Department of Heat and Refigeration Engineering, Rac?awicka 15-17, 75-620 Koszalin, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Ma?gorzata SikoraTechnical University of Koszalin, Department of Heat and Refigeration Engineering, Rac?awicka 15-17, 75-620 Koszalin, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1]Technical University of Koszalin, Department of Heat and Refigeration Engineering, Rac?awicka 15-17, 75-620 Koszalin, Poland

关键词: Keywords: Minichannels;    Condensation;    Zeotropic mixture;    Heat transfer coefficient;    Pressure drop;   

DOI  :  10.1515/aoter-2016-0012

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

The paper presents the results of experimental heat transfer and pressure drop during condensation of the single component refrigerant R134a and zeotropic mixtures R404A, R407C, and R410A in tube minichannels of internal diameter from the range 0.31-3.30 mm. The local values and the average of heat transfer coefficient and pressure drop in the whole range of the change in mass quality were measured. On the basis of the obtained test results there was illustrated the influence of the change of mass vapor quality, the mass flux density, and the inner diameter of channel on the studied parameters. These results were compared with the calculation results based on the relations postulated by other authors. The discrepancy range was ± 50%. On the basis of given test results own correlation was developed to calculate the heat transfer coefficient and pressure drop of tested refrigerants which presents the obtained results in a range of discrepancy of ±25%.

【 授权许可】

Unknown