Konstantinos Kontomaris - DuPont Fluoroproducts - FLUIDI REFRIGERANTI A BASSO GWP PER POMPE DI CALORE PER ALTE TEMPERATURE
Zero-ODP, Low GWPNon-FlammableWorking Fluids forHigh Temperature Heat PumpsJune 7th, 2013Kostas Kontomaris, Ph.D.DuPont Fluorochemicals R&DHFO-BasedIncreasing Energy pricesClimate ProtectionCSGLatest Technology in Refrigeration and Air ConditioningXV EUROPEAN CONFERENCE, MILANO 7th-8th JUNE 2013“Big energy savings have been achievedby seemingly minor technological changessuch as moving from gas boilersfor space heating to heat pumps.”Financial Times, June 4th, 2013
Heat Uplifting:Mechanical Compression Heat PumpsEvaporatorCondenserExpansionValveCompressor PowerLow Temp HeatT<100-120 oCWaste HeatGeothermal HeatSolar HeatHigh Temp HeatT: 80-160 oCReverseRankineCycleMay not be of adequate quality fordirect heating or mechanical power generation
Hydro-Fluoro-OlefinsCFCs HCFCs HFCs HFOsCFC-12 HFC-134a DR-14CFC-114 HFC-245fa DR-12CFC-11 HCFC-123 DR-2Less Chlorine No Chlorine Double BondConventional Wisdom:Unsaturated fluorocarbons arenot sufficiently stable to beused as refrigerants!Paradigm Shift:Unsaturated fluorocarbon refrigerantsdecompose rapidly in the atmospherebut can remain stable in a system!
DR-14, DR-12, DR-2 Components:Stable At Least Up to 250 oCEven After 2 Wks @ 250 oC:Clear Fluid, Clean CouponsNegligible formation of decomposition productsSealed tubetestingbased onASHRAE-ANSISTD 97IN SUMMARY(*):High Thermal StabilityAttractive Safety, Health and Environmental PropertiesRange of Favorable Thermodynamics vs Incumbents:Higher Critical Temperatures, Lower Vapor Pressures(*) Based on testing to date
Summary-ConclusionsHFOs: Rich class of zero-ODP, low GWPcompounds each with its own characteristics;pipeline of candidates tailor-made for variousapplications emergingNon-flammable, HFO-based, developmental fluidsDR-14, DR-12, and DR-2 could enable hightemperature heat pumps over wide ranges ofcondensing temperatures and volumetricheating capacities with attractive energyefficienciesDR-2: Could enable condensing temperatures upto 160oC
Thank you!Email:firstname.lastname@example.orgDisclaimer: The information set forth herein is furnished free of charge and based on technical data that DuPont believes to be reliable. It is intended for use by persons havingtechnical skill, at their own risk. Since conditions of use are outside our control, we make no warranties, expressed or implied and assume no liability in connection with any use of thisinformation. Nothing herein is to be taken as a license to operate under, or a recommendation to infringe any patents or patent applications.Claus-Peter KellerFluorochemicals Business Development EMEADu Pont de Nemours (Deutschland) GmbHTel: ++49 (0) 6102 / 18-2806Mobile: ++49 (0) 175 573 0043e-mail: email@example.com
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