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[null,"1.","Record Nr.",null,"UNINA9910714186103321"]
[null,null,"Autore",null,"Kedzierski Mark A"]
[null,null,"Titolo",null,"Influence of concentration and additives on R123/paraffinic material oil boiling heat transfer performance / / Mark A. Kedzierski, D.H. Han"]
[null,null,"Pubbl/distr/stampa",null,"[Gaithersburg, MD] : , : U.S. Dept. of Commerce, National Institute of Standards and Technology, , [2006]"]
[null,null,"Descrizione fisica",null,"1 online resource (42 pages) : illustrations"]
[null,null,"Collana",null,"NISTIR ; ; 7336"]
[null,null,"Soggetti",null,"Heat - Transmission"]
[{"$nulls":4},"Lubrication and lubricants"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","\"September 2006.\""]
[{"$nulls":4},"Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes."]
[{"$nulls":4},"Title from page [1], viewed March 5, 2007."]
[null,null,null,"Nota di bibliografia","Includes bibliographical references (page 12)."]
[null,null,null,"Sommario/riassunto","This report investigates the effect that oil concentration had on the boiling performance of an R123/paraffinic mineral oil mixture on a roughened, horizontal flat surface. For all compositions (0.5 %, 1 %, and 2 %), the lubricant caused a heat transfer degradation relative to the heat transfer of pure R123 of between 2 % and 70 % for the range of measured heat fluxes. The heat transfer degradation was shown to increase with lubricant mass fraction. The minimum heat transfer degradation for each mixture ranged between 2 % and 12 % and occurred at approximately 20 kW/m2. For a given composition, the heat transfer degradation increased as the heat flux increased from roughly 20 kW/m2 to 90 kW/m2. In addition, the effect of two trial additives on the pool boiling heat transfer of an R123/paraffinic mineral oil mixture was examined in order to test the validity of a theory for choosing oil additives to enhance boiling performance. The verification tests were inconclusive. More research with lubricants and additives with greater differences in surface tensions is required to develop a more rigorous and quantifiable theory for designing additives that improve boiling heat transfer."]