Heat transfer during condensation of refrigerants in tubular minichannels

Archives of Thermodynamics

Tadeusz BohdalCorresponding authorKoszalin University of Technology, Rac?awicka 15-17, 75-620 Koszalin, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Ma?gorzata SikoraKoszalin University of Technology, Rac?awicka 15-17, 75-620 Koszalin, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Henryk CharunKoszalin University of Technology, Rac?awicka 15-17, 75-620 Koszalin, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Koszalin University of Technology, Rac?awicka 15-17, 75-620 Koszalin, Poland

关键词: Keywords:: Condensation in minichannels;    Heat transfer;    Compact condenser;    Refrigeration;   

DOI  :  10.2478/v10173-012-0008-x

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 present paper describes the results of experimental investigations of heat transfer during condensation of R134a, R404A and R407C in pipe minichannels with internal diameters 0.31-3.30 mm. The results concern investigations of the local heat transfer coefficient. The results were compared with the correlations proposed by other authors. Within the range of examined parameters of the condensation process in minichannels made of stainless steel, it was established that the values of the heat transfer coefficient may be described with Akers et al., Mikielewicz and Shah correlations within a limited range of the mass flux density of the refrigerant and the minichannel diameter. On the basis of experimental investigations, the authors proposed their own correlation for the calculation of local heat transfer coefficient.

【 授权许可】

Unknown