Heat transfer characteristics of refrigerant-based nanofluid flow boiling inside a horizontal smooth tube

• Published in: International journal of refrigeration Vol. 32; no. 6; pp. 1259 - 1270
• Main Authors: Peng, Hao, Ding, Guoliang, Jiang, Weiting, Hu, Haitao, Gao, Yifeng
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2009; Elsevier
• Subjects: Additif; Additive; Applied sciences; Boiling; Copper; Cuivre; Devices using thermal energy; Energy; Energy. Thermal use of fuels; Evaporator; Exact sciences and technology; Experiment; Expérimentation; Heat exchanger; Heat exchangers (included heat transformers, condensers, cooling towers); Heat transfer; Horizontal tube; Oxide; Oxyde; Particle; Particule; R113; Refrigerants; Refrigerating engineering; Refrigerating engineering. Cryogenics. Food conservation; Smooth tube; Theoretical studies. Data and constants. Metering; Transfert de chaleur; Tube horizontal; Tube lisse; Ébullition; Échangeur de chaleur; Évaporateur; Oxyde; Échangeur de chaleur; Particule; Cuivre; Additif; Experiment; Tube horizontal; R113; Tube lisse; Smooth tube; Boiling; Expérimentation; Particle; Oxide; Ébullition; Additive; Évaporateur; Transfert de chaleur; Heat exchanger; Evaporator; Horizontal tube; Copper; Heat transfer; Refrigeration installation; Vapor; Correlation; Evaporation; Heat transfer coefficient; Pressure; Quality; Refrigerant fluid
• ISSN: 0140-7007; 1879-2081
• DOI: 10.1016/j.ijrefrig.2009.01.025

The objective of this paper is to investigate the influence of nanoparticles on the heat transfer characteristics of refrigerant-based nanofluid flow boiling inside a horizontal smooth tube, and to present a correlation for predicting heat transfer performance of refrigerant-based nanofluid. For the convenience of preparing refrigerant-based nanofluid, R113 refrigerant and CuO nanoparticles were used. Experimental conditions include an evaporation pressure of 78.25 kPa, mass fluxes from 100 to 200 kg m −2 s −1, heat fluxes from 3.08 to 6.16 kW m −2, inlet vapor qualities from 0.2 to 0.7, and mass fractions of nanoparticles from 0 to 0.5 wt%. The experimental results show that the heat transfer coefficient of refrigerant-based nanofluid is larger than that of pure refrigerant, and the maximum enhancement of heat transfer coefficient is 29.7%. A heat transfer correlation for refrigerant-based nanofluid is proposed, and the predictions agree with 93% of the experimental data within the deviation of ±20%.