The LHP is a two-phase device with extremely high
effective thermal conductivity that utilizes the thermodynamic
pressure difference to circulate a cooling fluid. A thermodynamics
analytical model is developed to explore different parameters effects
on a Loop Heat Pipe (LHP).. The effects of pipe length, pipe
diameter, condenser temperature, and heat load are reported. As pipe
length increases and/or pipe diameter decreases, a higher temperature
is expected in the evaporator.
[1] Yu.F. Maydanik, Review Loop heat pipes, Applied Thermal
Engineering, 25 (2005) 635-657.
[2] Alklaibi, A.M., Evaluating the possible configurations of incorporating
the loop heat pipe into the air-conditioning systems, International
Journal of Refrigeration (2008), doi:10.1016/j.ijrefrig. 2007.11.007
[3] L. L. Vasiliev, Review Heat pipes in modern heat exchangers, Applied
Thermal Engineering, 25 (2005) 1-19
[4] Chernysheva M.A., Vershinin S.V., Maydanik Yu. F., Operating
temperature and distribution of a working fluid in LHP, International
Journal of Heat and Mass Transfer, 50 (2007) 2704-2713.
[5] Chandratilleke C., Hatakeyama H., and Nakagome H., Development of
Cryogenic Loop Heat Pipes, Cryogenics, 38, 3, 263-269.
[6] Hoelke, H.T. Henderson, F. M. Gerner and M. Kazmierczak, Analysis of
the Heat Transfer Capacity of a Micromachined Loop Heat Pipe,
International Mechanical Engineering Congress and Exposition, IMECE,
ASME Publication HTD-Vol. 364-3, 53-60, November 15-20, 1999,
Nashville, Tennessee.
[7] Maidanik Y., Vershinin S., Kholodov V., and Dolggirev J., Heat
Transfer Apparatus, US patent 4515209, May (1985).
[8] Dhir V., Kandlikar S., Fujita Y., Iida Y., and Heist R., Nucleate Boiling,
Handbook of Phase Change: Boiling and Condensation, Editor
Kandlikar S., Shoji M., and Dhir V., Ch. 4, pp 71-120, (1999).
[9] Nikitkin M., and Cullimore B., CPL and LHP Technologies: What are
the Differences, What are the Similarities?, SAE Paper 981587, (1998).
[10] Hamdan, M., Gerner, F., Henderson, T., Steady State Model of a Loop
Heat Pipe (LHP) With Coherent Porous Silicon (CPS) Wick in the
Evaporator, The Nineteenth Annual IEEE Semiconductor Thermal
Measurement and Management Symposium, pp 88-96, (2003).
[11] Hoang T. T., Ku J., Miniature Loop Heat pipes for Electronic Cooling,
Proceedings of IPACK03, International Electronic Packaging Technical
Conference and Exhibition, July 6-11, (2003), Maui, Hawaii, USA.
[12] Kaya T., Mathematical Modeling of Loop Heat Pipes and Experimental
Validation, J. of Thermophysics & Heat Transfer, 13, 3, (1999), 314-
320.
[13] Launay S., Sartre V., Parametric analysis of loop heat pipe operation: a
literature review, Jocelyn Bonjour, International Journal of Thermal
Sciences 46 (2007) 621-636.
[14] R. Singh et al., Operational characteristics of a miniature loop heat pipe
with flat evaporator, International Journal of Thermal Sciences (2008),
doi:10.1016/j.ijthermalsci.2007.12.013
[15] Hamdan M., Cytrynowicz D., Medis P., Shuja A.,Gerner F., Henderson
H., Golliher E., Mellott K., Moore C., Loop Heat Pipe (LHP)
Development by Utilizing Coherent Porous Silicon (CPS) Wicks,
Proceedings of the 8th ITHERM Conference, May 29-June 2, (2002),
457-465.
[16] Cytrynowicz D., Hamdan M., Medis P., Shuja A.,Gerner F., Henderson
H., Golliher E., Mellott K., Moore C., "MEMS Loop Heat Pipe Based on
Coherent Porous Silicon Technology", Proceeding the Space
Technology and Applications International Forum, (2002) 220-232 .
[17] Cytrynowicz, D., Hamdan, M., Medis, P., Henderson, T., Gerner, F.,
Golliher, E., "Test Cell for a Novel Planar MEMS Loop Heat Pipe Based
on Coherent Porous Silicon", Space Technology and Applications
International Forum, February 2 - 6, (2003), Albuquerque, New Mexico.
[18] J. M. Cimbala, J. S. Brenizer, Jr, A. Po-Ya Chuang, S. Hanna, C. T.
Conroy, A.A. El-Ganayni, D. R. Riley, Study of a loop heat pipe using
neutron radiography, Applied Radiation and Isotopes, 61 (2004) 701-
705.
[19] Kaviany M., Principle of Heat Transfer in Porous Media, 2nd ed.,
Springer, New York, 1995.
[20] Ku J., "Operating Characteristics of Loop Heat pipes", 1999, 29th
International Conference on Environmental system, Denver, Colorado,
July 1999.
[1] Yu.F. Maydanik, Review Loop heat pipes, Applied Thermal
Engineering, 25 (2005) 635-657.
[2] Alklaibi, A.M., Evaluating the possible configurations of incorporating
the loop heat pipe into the air-conditioning systems, International
Journal of Refrigeration (2008), doi:10.1016/j.ijrefrig. 2007.11.007
[3] L. L. Vasiliev, Review Heat pipes in modern heat exchangers, Applied
Thermal Engineering, 25 (2005) 1-19
[4] Chernysheva M.A., Vershinin S.V., Maydanik Yu. F., Operating
temperature and distribution of a working fluid in LHP, International
Journal of Heat and Mass Transfer, 50 (2007) 2704-2713.
[5] Chandratilleke C., Hatakeyama H., and Nakagome H., Development of
Cryogenic Loop Heat Pipes, Cryogenics, 38, 3, 263-269.
[6] Hoelke, H.T. Henderson, F. M. Gerner and M. Kazmierczak, Analysis of
the Heat Transfer Capacity of a Micromachined Loop Heat Pipe,
International Mechanical Engineering Congress and Exposition, IMECE,
ASME Publication HTD-Vol. 364-3, 53-60, November 15-20, 1999,
Nashville, Tennessee.
[7] Maidanik Y., Vershinin S., Kholodov V., and Dolggirev J., Heat
Transfer Apparatus, US patent 4515209, May (1985).
[8] Dhir V., Kandlikar S., Fujita Y., Iida Y., and Heist R., Nucleate Boiling,
Handbook of Phase Change: Boiling and Condensation, Editor
Kandlikar S., Shoji M., and Dhir V., Ch. 4, pp 71-120, (1999).
[9] Nikitkin M., and Cullimore B., CPL and LHP Technologies: What are
the Differences, What are the Similarities?, SAE Paper 981587, (1998).
[10] Hamdan, M., Gerner, F., Henderson, T., Steady State Model of a Loop
Heat Pipe (LHP) With Coherent Porous Silicon (CPS) Wick in the
Evaporator, The Nineteenth Annual IEEE Semiconductor Thermal
Measurement and Management Symposium, pp 88-96, (2003).
[11] Hoang T. T., Ku J., Miniature Loop Heat pipes for Electronic Cooling,
Proceedings of IPACK03, International Electronic Packaging Technical
Conference and Exhibition, July 6-11, (2003), Maui, Hawaii, USA.
[12] Kaya T., Mathematical Modeling of Loop Heat Pipes and Experimental
Validation, J. of Thermophysics & Heat Transfer, 13, 3, (1999), 314-
320.
[13] Launay S., Sartre V., Parametric analysis of loop heat pipe operation: a
literature review, Jocelyn Bonjour, International Journal of Thermal
Sciences 46 (2007) 621-636.
[14] R. Singh et al., Operational characteristics of a miniature loop heat pipe
with flat evaporator, International Journal of Thermal Sciences (2008),
doi:10.1016/j.ijthermalsci.2007.12.013
[15] Hamdan M., Cytrynowicz D., Medis P., Shuja A.,Gerner F., Henderson
H., Golliher E., Mellott K., Moore C., Loop Heat Pipe (LHP)
Development by Utilizing Coherent Porous Silicon (CPS) Wicks,
Proceedings of the 8th ITHERM Conference, May 29-June 2, (2002),
457-465.
[16] Cytrynowicz D., Hamdan M., Medis P., Shuja A.,Gerner F., Henderson
H., Golliher E., Mellott K., Moore C., "MEMS Loop Heat Pipe Based on
Coherent Porous Silicon Technology", Proceeding the Space
Technology and Applications International Forum, (2002) 220-232 .
[17] Cytrynowicz, D., Hamdan, M., Medis, P., Henderson, T., Gerner, F.,
Golliher, E., "Test Cell for a Novel Planar MEMS Loop Heat Pipe Based
on Coherent Porous Silicon", Space Technology and Applications
International Forum, February 2 - 6, (2003), Albuquerque, New Mexico.
[18] J. M. Cimbala, J. S. Brenizer, Jr, A. Po-Ya Chuang, S. Hanna, C. T.
Conroy, A.A. El-Ganayni, D. R. Riley, Study of a loop heat pipe using
neutron radiography, Applied Radiation and Isotopes, 61 (2004) 701-
705.
[19] Kaviany M., Principle of Heat Transfer in Porous Media, 2nd ed.,
Springer, New York, 1995.
[20] Ku J., "Operating Characteristics of Loop Heat pipes", 1999, 29th
International Conference on Environmental system, Denver, Colorado,
July 1999.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:63853", author = "Mohammad Hamdan and Emad Elnajjar", title = "Loop Heat Pipe: Simple Thermodynamic", abstract = "The LHP is a two-phase device with extremely high
effective thermal conductivity that utilizes the thermodynamic
pressure difference to circulate a cooling fluid. A thermodynamics
analytical model is developed to explore different parameters effects
on a Loop Heat Pipe (LHP).. The effects of pipe length, pipe
diameter, condenser temperature, and heat load are reported. As pipe
length increases and/or pipe diameter decreases, a higher temperature
is expected in the evaporator.", keywords = "Loop Heat Pipe, LHP, Passive Cooling, CapillaryForce.", volume = "3", number = "4", pages = "448-7", }
