03081nam 2200541Ia 450 991071418610332120180711120939.0GOVPUB-C13-489b90561284b9ea95651b896d6f68ac(CKB)4330000001259444(OCoLC)86119043(OCoLC)994330000001259444(EXLCZ)99433000000125944420070323d2006 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierInfluence of concentration and additives on R123/paraffinic material oil boiling heat transfer performance /Mark A. Kedzierski, D.H. Han[Gaithersburg, MD] :U.S. Dept. of Commerce, National Institute of Standards and Technology,[2006].1 online resource (42 pages) illustrationsNISTIR ;7336"September 2006."Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Title from page [1], viewed March 5, 2007.Includes bibliographical references (page 12).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.HeatTransmissionLubrication and lubricantsHeatTransmissionfastLubrication and lubricantsfastHeatTransmission.Lubrication and lubricants.HeatTransmission.Lubrication and lubricants.Kedzierski Mark A1387761Han D. H1408586Building and Fire Research Laboratory (U.S.)NBSNBSOCLCQOCLCFOCLCOOCLCQBOOK9910714186103321Influence of concentration and additives on R1233492910UNINA01831nam 2200433 a 450 991070208360332120120809083030.0(CKB)5470000002423289(OCoLC)805542177(EXLCZ)99547000000242328920120809d2012 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierForeign police assistance[electronic resource] defined roles and improved information sharing could enhance interagency collaboration : report to the Ranking Member, Subcommittee on National Security, Homeland Defense and Foreign Operations, Committee on Oversight and Government Reform, House of Representatives[Washington, D.C.] :U.S. Govt. Accountability Office,[2012]1 online resource (iii, 61 pages) illustrations, mapTitle from PDF title screen (viewed July 16, 2012)."May 2012.""GAO-12-534."Includes bibliographical references.Foreign police assistance Police trainingFinancePolice administrationFinanceEconomic assistance, AmericanInteragency coordinationUnited StatesEvaluationPolice trainingFinance.Police administrationFinance.Economic assistance, American.Interagency coordinationEvaluation.United States.Congress.House.Committee on Oversight and Government Reform.Subcommittee on National Security, Homeland Defense, and Foreign Operations.GPOGPOBOOK9910702083603321Foreign police assistance3475461UNINA