LEADER 03081nam 2200541Ia 450 001 9910714186103321 005 20180711120939.0 024 8 $aGOVPUB-C13-489b90561284b9ea95651b896d6f68ac 035 $a(CKB)4330000001259444 035 $a(OCoLC)86119043 035 $a(OCoLC)994330000001259444 035 $a(EXLCZ)994330000001259444 100 $a20070323d2006 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aInfluence of concentration and additives on R123/paraffinic material oil boiling heat transfer performance /$fMark A. Kedzierski, D.H. Han 210 1$a[Gaithersburg, MD] :$cU.S. Dept. of Commerce, National Institute of Standards and Technology,$d[2006]. 215 $a1 online resource (42 pages) $cillustrations 225 1 $aNISTIR ;$v7336 300 $a"September 2006." 300 $aContributed record: Metadata reviewed, not verified. Some fields updated by batch processes. 300 $aTitle from page [1], viewed March 5, 2007. 320 $aIncludes bibliographical references (page 12). 330 $aThis 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. 606 $aHeat$xTransmission 606 $aLubrication and lubricants 606 $aHeat$xTransmission$2fast 606 $aLubrication and lubricants$2fast 615 0$aHeat$xTransmission. 615 0$aLubrication and lubricants. 615 7$aHeat$xTransmission. 615 7$aLubrication and lubricants. 700 $aKedzierski$b Mark A$01387761 701 $aHan$b D. H$01408586 712 02$aBuilding and Fire Research Laboratory (U.S.) 801 0$bNBS 801 1$bNBS 801 2$bOCLCQ 801 2$bOCLCF 801 2$bOCLCO 801 2$bOCLCQ 906 $aBOOK 912 $a9910714186103321 996 $aInfluence of concentration and additives on R123$93492910 997 $aUNINA