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LOOP HEAT PIPE (LHP) MODELING AND DEVELOPMENT BY UTILIZING COHERENT POROUS SILICION (CPS) WICKS

HAMDAN, MOHAMMAD OMAR
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1049987207

Abstract Details

2003, PhD, University of Cincinnati, Engineering : Mechanical Engineering.
A theoretical steady state study is conducted to explore the effect of different parameters on the performance of a micro Loop Heat Pipe (LHP) that utilizes a Coherent Porous Silicon wick (CPS). The steady state LHP model is described by the conservation equations, thermodynamic relations, and capillary and nucleate boiling limits. A LHP is a two-phase device with extremely high effective thermal conductivity that uses the thermodynamic forces developed between the evaporator and the condenser combined with the interfacial capillary force developed inside its wicked evaporator to circulate a working fluid through a closed loop. Loop heat pipes were developed to efficiently transport heat that is generated by a highly localized concentrated heat source and then to discharge this heat to a convenient sink. The loop heat pipe cycle is presented on a temperature-entropy diagram. A relationship is developed to predict the ratio of the heat of evaporation to the heat leaked to the compensation chamber. This work predicts the size of a LHP, the pumping distance, the maximum evaporator temperature, condenser temperature, sub-cooled temperature needed, and the maximum power that can be dissipated for a fixed source temperature. Promising theoretical heat flux, around 100 W/cm2, can be removed utilizing a CPS wick with 5μm effective pore diameter and porosity of 50 percent or higher.
DR. FRANK GERNER (Advisor)
161 p.
LHP; LOOP HEAT PIPE; CPS; CAPILLARY PRESSURE; CPL - CAPILLARY PUMPED LOOP

Recommended Citations

Citations

  • HAMDAN, M. O. (2003). LOOP HEAT PIPE (LHP) MODELING AND DEVELOPMENT BY UTILIZING COHERENT POROUS SILICION (CPS) WICKS [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1049987207

    APA Style (7th edition)

  • HAMDAN, MOHAMMAD. LOOP HEAT PIPE (LHP) MODELING AND DEVELOPMENT BY UTILIZING COHERENT POROUS SILICION (CPS) WICKS. 2003. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1049987207.

    MLA Style (8th edition)

  • HAMDAN, MOHAMMAD. "LOOP HEAT PIPE (LHP) MODELING AND DEVELOPMENT BY UTILIZING COHERENT POROUS SILICION (CPS) WICKS." Doctoral dissertation, University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1049987207

    Chicago Manual of Style (17th edition)

ucin1049987207
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© 2003, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.