Sökning: "vacuum technology"

Visar resultat 1 - 5 av 277 avhandlingar innehållade orden vacuum technology.

  1. 1. Flow and turbulence in the discharge stream of different agitators for stirred tanks

    Detta är en avhandling från Sveriges Lantbruksuniversitet

    Författare :Tamás Kovács; Lund University.; Lunds universitet.; [2001]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluiddynamik; Gaser; plasmas; fluid dynamics; Gases; Livsmedelsteknik; Food and drink technology; Scaba; 6SRGT; pseudo turbulence; Rushton; stirred tank; plasma; Mechanical engineering; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Sammanfattning : In this thesis, the fluid dynamic properties of the conventional Rushton turbine and another impeller type, the Scaba Radial flow Gas dispersing Turbine (with six concave blades) are compared. For comparison, point-wise velocity measurements were made in the discharge of the two turbine types using Hot-Wire Anemometry in constant temperature mode (CTA) with a split film probe. LÄS MER

  2. 2. Granulation and recycling of polymers

    Detta är en avhandling från Division of production and materials engineering

    Författare :Toni Reftman; Lund University.; Lunds universitet.; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materialteknik; Materiallära; Material technology; akustik; vibrationer; vakuumteknik; granulation; granulators; recycling; size reduction; cutting resistance; hydraulics; Mechanical engineering; vacuum technology; vibration and acoustic engineering; hydraulik; Maskinteknik; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : The use of polymers and composite materials based on polymer matrix systems increases. With this raise the demands on recycling of both post-consumer and in house based material increase. The demands on the recycling process also increase. The reason is that the process more often has to be a part of the conventional production line. LÄS MER

  3. 3. Dynamiskt belastade tribologiska system under plastisk formning, del II --- analyserade genom akustisk emission

    Detta är en avhandling från Viveca Tengå, Div. of Production and Materials Eng., Box 118, S-221 00 LUND, Sweden

    Författare :Thomas Skåre; Lund University.; Lunds universitet.; [2001]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; supervision; wear; waves; vibrations; tribology; surfaces; stick-slip; sliding; sheet metal; quality check; plastic forming; monitoring; galling; machining; deep drawing; friction; cracking; contact surfaces; Acoustic emission AE ; contact pressure; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; Material technology; Materiallära; materialteknik; Production technology; Produktionsteknik;

    Sammanfattning : The dynamic friction process and contact surface between tool and working material in a plastic forming process is hard to describe in mathematical form and hard to monitor and control in real time. High production speed and highly optimised forming operations result in great demands on the control equipment. LÄS MER

  4. 4. Evaluation of UHT milk processed by direct steam injection and steam infusion technology

    Detta är en avhandling från Department of Food Technology, Engineering and Nutrition, Lund University

    Författare :Bozena Malmgren; Lund University.; Lunds universitet.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sedimentation; gel formation; microstructure; TEM transmission electron microscopy; immunogold labelling; heat effects; Technological sciences; Teknik; Food and drink technology; Livsmedelsteknik; proteolysis; steam infusion; UHT milk; steam injection;

    Sammanfattning : UHT direct steam injection and steam infusion are widely used; however there is no comparison of their impact on milk components. This study evaluates the structural changes at different steps during the UHT processing of whole milk in a full-scale UHT plant by transmission electron microscopy (TEM) and particle size measurements, and follows the enzymatic activity. LÄS MER

  5. 5. Vacuum insulation in buildings Means to prolong service life

    Detta är en avhandling från Stockholm : KTH

    Författare :Thomas I. Thorsell; KTH.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vacuum insulation; thermal bridge; serpentine edge; coated film; TECHNOLOGY Civil engineering and architecture Building engineering; TEKNIKVETENSKAP Samhällsbyggnadsteknik och arkitektur Byggnadsteknik;

    Sammanfattning : Vacuum insulation panels, VIPs, constitute a new insulation material, 6 to 8 times better than traditional insulation materials, which utilizes the positive influence vacuum has on the thermal properties of certain materials. A VIP is a composite with a flat core enclosed by an envelope preventing the core to fill with gas. LÄS MER