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Hittade 2 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Measurements and Modelling of Convective Vaporization for Refrigerants in a Horizontal Tube

   Författare :Peter Melin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; n-butane; HFC134a; pressure drop; propane; HFC143a; horizontal flow boiling; in-tube vaporization; HFC125; HFC32; experimental study; HCFC142b; HCFC22; non-azeotropic mixtures; CFC12; modelling; mixture effects;

   Sammanfattning : An evaporator facility has been constructed to measure local values of heat transfer and pressure drop. The evaporator resembles a normal working evaporator tube in a direct-expansion evaporator applicable to large heat pump/refrigeration cycles, typically over 500 kW. The evaporator is brine-heated and uses an expansion valve to control the inlet. LÄS MER

3. 2. Fluorinated hydrocarbons used as refrigerants : toxicokinetics and effects in humans

   Författare :Sara Gunnare; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs) have replaced the chlorofluorocarbons (CFCs) in refrigeration installations and air-conditioning applications. As substitution progressed, some refrigeration mechanics experienced symptoms of inflammation. LÄS MER