ShareBinary nanoemulsion as a refrigerant of diffusion absorption refrigeration.
Number: pap. n. 64
Author(s) : LEE K. R., LEE J. K., KANG Y. T.
Summary
Nanofluid is defined as stable suspensions of highly conductive nanoparticles in a base fluid. Binary nano emulsion is defined as the nano emulsion of which base fluid is a binary mixture such as NH3/H2O solution. The added nanoparticles in the base fluid should be stably dispersed to obtain better thermo-physical properties. The research for using these characteristics of nanoparticles has been extensively studied and is still in progress. The objectives of this paper are to estimate the effect of nano-sized oil droplets on the performance of a diffusion absorption refrigerator (DAR) and to find the relationship between the dispersion stability and COP enhancement of the DAR system. The concentration and ratio of oil and surfactants are considered as the key parameters. N-decane oil is added into NH3/H2O solution to make the binary nano emulsions, and C12E4 (Polyoxyethylene lauryl ether) and TWEEN20 (Polyoxyethylen sorbitan monolaurate, C58H114O26) are used as the surfactants for stable dispersion. The dispersion stability of binary nano emulsions is evaluated by the droplet size measurement and Tyndall effect analysis. It is found that the binary nano emulsion fluid increases the COP of the DAR system as high as 15% compared with that of the base fluid refrigerator. Also, it is found that a strong relationship between the dispersion stability and the heat and mass transfer performance should be existed.
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Details
- Original title: Binary nanoemulsion as a refrigerant of diffusion absorption refrigeration.
- Record ID : 30014358
- Languages: English
- Source: International sorption heat pump conference (ISHPC2014), College Park, United States, March 31-April 2, 2014.
- Publication date: 2014/03/02
Links
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Indexing
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Themes:
Heat transfer;
Mass transfer;
Absorption and adsorption systems - Keywords: Mass transfer; Heat transfer; Ammonia; Absorption; Binary mixture; Emulsion; COP; Refrigerant; Water; Diffusion
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