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Operation and Heuristic Design of Closed Loop Two-Phase Wicked Thermosyphons (CLTPWT) for Cooling Light Emitting Diodes (LEDs)

Remella Siva Rama, Karthik
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522314073895889

Abstract Details

2018, PhD, University of Cincinnati, Engineering and Applied Science: Metallurgical Engineering.
A novel two-phase thermal solution, the Closed Loop Two-Phase Wicked Thermosyphon (CLTPWT), is introduced. This device was designed and tested by BritePointe Inc. for thermal management of high power light emitting diodes (LEDs) on factory floors. Contrary to conventional two-phase thermal management devices with micro-porous wick structures, this device operated based on a favorable hydrostatic potential provided by gravitational forces, and hence the name `Wicked Thermosyphon’. It has three sections – the evaporator, condenser, and sub-cooler. Water is employed as working fluid in this device. The steady-state operation is discussed in detail and mathematical models are developed to understand and predict steady-state performance. This includes developing steady-state energy, mass and pressure balance relationships on both the coil (condenser and sub-cooler together) and evaporator package sections. The effect of various void fraction correlations, from the literature, on the total mass of liquid in the condenser is studied. A natural convection heat transfer correlation on the air side is developed using steady-state temperature data for various operating powers (Qtherm) and is compared with available correlations from the literature (Hahne et al. [1]).
Frank Gerner, PhD (Committee Chair)
Michael Kazmierczak, Ph.D. (Committee Member)
Ahmed Shuja, Ph.D. (Committee Member)
Kumar Vemaganti, Ph.D. (Committee Member)
240 p.
Mechanical Engineering
Thermosyphons; Light emitting diodes; Two-phase cooling; electronics cooling; CLTPWT; thermal management

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Citations

  • Remella Siva Rama, K. (2018). Operation and Heuristic Design of Closed Loop Two-Phase Wicked Thermosyphons (CLTPWT) for Cooling Light Emitting Diodes (LEDs) [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522314073895889

    APA Style (7th edition)

  • Remella Siva Rama, Karthik. Operation and Heuristic Design of Closed Loop Two-Phase Wicked Thermosyphons (CLTPWT) for Cooling Light Emitting Diodes (LEDs). 2018. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522314073895889.

    MLA Style (8th edition)

  • Remella Siva Rama, Karthik. "Operation and Heuristic Design of Closed Loop Two-Phase Wicked Thermosyphons (CLTPWT) for Cooling Light Emitting Diodes (LEDs)." Doctoral dissertation, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522314073895889

    Chicago Manual of Style (17th edition)

ucin1522314073895889
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© 2018, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.