Search for dissertations about: "HFC134a"

Found 5 swedish dissertations containing the word HFC134a.

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

    Author : Peter Melin; Chalmers tekniska högskola; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 2. Viscosity and Boiling Heat Transfer for Mixtures of HFC Working Fluids and Compressor Oils

    Author : Cyril Thébault; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; local heat transfer; R410A; oil refreigerant mixtures; R407C; HFC125; HFC32; HFC134a; horizontal flow boiling; solubility and viscosity; polyolester oil;

    Abstract : .... READ MORE

  5. 3. Flow Boiling heat transfer and pressure drop for HCFC22 and HFC134a in a horizontal tube- an experimental study

    Author : Peter Melin; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : .... READ MORE

  6. 4. Fluorinated hydrocarbons used as refrigerants : toxicokinetics and effects in humans

    Author : Sara Gunnare; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : 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. READ MORE

  7. 5. Corresponding States Correlations for the Prediction of Thermodynamic Properties of Refrigerants

    Author : Maria Sörner; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; refrigerant mixtures; corresponding states; parameter estimation; equation of state; refrigerants; thermodynamic properties;

    Abstract : When process equipment such as separation units, heat pumps, and refrigeration systems are simulated or designed, physico-chemical properties of the fluids involved must be known. The outcome of the simulation or design depends on the accuracy of the correlations used in the prediction of physico-chemical data, so it is of the utmost importance that the correlations used correctly describe the properties of the fluids. READ MORE