Search for dissertations about: "horizontal flow boiling"

Showing result 1 - 5 of 6 swedish dissertations containing the words horizontal flow boiling.

2. 1. Phase Change Phenomena During Fluid Flow in Microchannels

   Author : Rashid Ali; Björn E Palm; Gian Piero Celata; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microchannels; Boiling; Heat Transfer; Thermal energy engineering; Termisk energiteknik; SRA - Energy; SRA - Energi;

   Abstract : Phase change phenomena of a fluid flowing in a micro channel may be exploited to make the heat exchangers more compact and energy efficient. Compact heat exchangers offer several advantages such as light weight, low cost, energy efficiency, capability of removing high heat fluxes and charge reduction are a few to mention. READ MORE

4. 2. An Experimental Study on Micro-Hydrodynamics of Evaporating/Boiling Liquid Film

   Author : Shengjie Gong; Ma Weimin; Horst-Michael Prasser; KTH; []
   Keywords : liquid film; critical thickness; boiling; critical heat flux; rupture; dry spot; confocal optical sensor; SRA - Energy; SRA - Energi;

   Abstract : Study of liquid film dynamics is of significant importance to the understanding and control of various industrial processes that involve spray cooling (condensation), heating (boiling), coating, cleaning and lubrication. For instance, the critical heat flux (CHF) of boiling heat transfer is one of the key parameters ensuring the efficiency and safety of nuclear power plants under both operational and accident conditions, which occurs as the liquid layers (microlayer and macrolayer) near the heater wall lose their integrity. READ MORE

5. 3. 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

6. 4. 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

7. 5. 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