Sökning: "in-tube vaporization"

Hittade 3 avhandlingar innehållade orden in-tube vaporization.

  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. A study on nanophase functional materials : high Tcsuperconductors and Zinc Oxide

    Författare :Lingna Wang; KTH; []
    Nyckelord :;

    Sammanfattning : Nanophase materials are an active materials research topicthat has received a great deal of attention over the past fewyears. Tlus mesis deals mainly with the synthesis, processing,and characterization of nanophase functional materials. Twotypes of functional materials were considered: high temperaturesuperconducting oxides (HTSC) and Wnc oxide. LÄS MER

  4. 3. Hybrid fiber preform fabrication using CO laser heating

    Författare :Taras Oriekhov; Michael Fokine; Cruz José; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Preform; CO laser; silicon-core fiber; semiconductor-core fiber; specialty fiber; optical fiber.; Optik och fotonik; Optics and Photonics;

    Sammanfattning : This thesis describes the development of a new prototyping technique for specialty optical fibers and covers all the fabrication steps from preform to fiber. The technique allows to produce fibers of a custom core structure and material composition, mainly focusing on semiconductor core fibers. LÄS MER