An overview of the effect of lubricant on the heat transfer performance on conventional refrigerants and natural refrigerant R-744

被引:34
作者
Wang, Chi-Chuan [1 ]
Hafner, Armin [2 ]
Kuo, Cheng-Shu [3 ]
Hsieh, Wen-Der [3 ]
机构
[1] Natl Chiao Tung Univ, Dept Mech Engn, Hsinchu 300, Taiwan
[2] SINTEF Energy Res, N-7465 Trondheim, Norway
[3] Ind Technol Res Inst, Green Energy Res Labs, Hsinchu 310, Taiwan
关键词
Refrigerant; Lubricant; Heat transfer coefficient; Gas cooling; Boiling; Condensation; PRESSURE-DROP CHARACTERISTICS; SUPERCRITICAL CARBON-DIOXIDE; 2-PHASE FLOW PATTERN; BOILING PERFORMANCE; R-114-OIL MIXTURES; R410A-OIL MIXTURE; ENHANCED SURFACES; HORIZONTAL TUBES; OIL MIXTURES; PART II;
D O I
10.1016/j.rser.2012.04.054
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This review provides an overview of the lubricant on the heat transfer performance, including nucleate boiling, convective boiling, shell side condensation, forced convective condensation, and gas cooling, for conventional refrigerants and natural refrigerant R-744. Various parameters affecting the heat transfer coefficient subject to lubricant, such as oil concentration, heat flux, mass flux, vapor quality, geometric configuration, saturation temperature, thermodynamic and transport properties are discussed in this overview. It appears that the effect of individual parameter on the Prod. Type: FTP heat transfer coefficient may be different from studies to studies. This is associated with the complex nature of lubricant and some compound effect accompanying with the heat transport process. In this review, the authors try to summarize the general trend of the lubricant on the heat transfer coefficient, and to elaborate discrepancies of some inconsistent studies. The lubricant can, increase or impair the heat transfer performance depending on the oil concentration, surface tension, surface geometry, and the like. For the condensation, it is more well accepted that the presence of lubricant normally will impair the heat transfer performance due to deposited oil film. However, the deterioration is comparatively smaller than that in nucleate/convective boiling. For the effect of lubricant on R-744 with convective evaporation, the general behavior is in line with the convectional refrigerant. For gas cooling, the lubricant cast significant effect on heat transfer coefficient especially for a higher mass flux or at a smaller diameter tube. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:5071 / 5086
页数:16
相关论文
共 99 条
[1]  
Adbul'Manov KHA, 1971, HEAT TRANSFER SOVIET, V3, P176
[2]   Flow boiling characteristics and flow pattern visualization of refrigerant/lubricant oil mixtures [J].
Bandarra Filho, Enio P. ;
Cheng, Lixin ;
Thome, John R. .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2009, 32 (02) :185-202
[3]   In-tube condensation of mixture of R134a and ester oil: empirical correlations [J].
Bassi, R ;
Bansal, PK .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2003, 26 (04) :402-409
[4]  
Bell KI, 1987, EXP HEAT TRANSFER, V1, P71
[5]   Heat transfer and pressure drop during condensation of refrigerants inside horizontal enhanced tubes [J].
Cavallini, A ;
Del Col, D ;
Doretti, L ;
Longo, GA ;
Rossetto, L .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2000, 23 (01) :4-25
[6]   EFFECT OF LUBRICATING OIL CONTAMINATION ON CONDENSATION IN REFRIGERANT-R22 [J].
CAWTE, H .
INTERNATIONAL JOURNAL OF ENERGY RESEARCH, 1992, 16 (04) :327-340
[7]   Two-phase frictional pressure drop of R-134a and R-410A refrigerant-oil mixtures in straight tubes and U-type wavy tubes [J].
Chen, Ing Youn ;
Wu, Yu-Shi ;
Chang, Yu-Juei ;
Wang, Chi-Chuan .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2007, 31 (04) :291-299
[8]   Influence of oil on R-410A two-phase frictional pressure drop in a small U-type wavy tube [J].
Chen, IY ;
Won, CL ;
Wang, CC .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2005, 32 (06) :797-808
[9]  
Chitti M.S., 1996, INT J HVACR RES, V2, P79
[10]   Condensation heat transfer for R-22 and R-407C refrigerant-oil mixtures in a microfin tube with a U-bend [J].
Cho, K ;
Tae, SJ .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (11) :2043-2051