Research output: Contribution to journal › Conference article › peer-review
Critical heat flux and heat transfer in a thermosiphon with enhanced surfaces for boiling and condensation. / Chinnov, E. A.; Shatskiy, E. N.; Ronshin, F. V.
In: Journal of Physics: Conference Series, Vol. 1105, No. 1, 012129, 28.11.2018.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Critical heat flux and heat transfer in a thermosiphon with enhanced surfaces for boiling and condensation
AU - Chinnov, E. A.
AU - Shatskiy, E. N.
AU - Ronshin, F. V.
N1 - Publisher Copyright: © Published under licence by IOP Publishing Ltd.
PY - 2018/11/28
Y1 - 2018/11/28
N2 - The technology of solid-state light source is associated with the future of a number of sectors of economy. Duration of failure-free operation, optical radiation power and other output characteristics of the LEDs are closely linked with p-n junction temperature, which makes the development of the cooling systems an important step in creating LED systems. In this work, we have created a new type of thermosiphon for studying heat transfer from a local heat source. Boiling heat transfer on the local heaters with the diameter of 1 and 5 mm has been investigated. It is shown that on the finned surfaces overheating relative to the saturation temperature in comparison with a smooth surface decreases up to three times for the heater with the diameter of 5 mm. For finned surfaces on the heater with a diameter of 1 mm, surface overheating relative to the saturation temperature decreases four times. More than three times increase is observed for the heat transfer coefficient on finned surfaces as compared to the smooth ones. It is shown that the value of the critical heat flux (CHF) under the conditions of a large volume of liquid for the heaters with D = 1.6 and 5 mm is in good agreement with the known dependences. Radial finning of the heater has no effect on CHF. The value of CHF for D = 1 mm turns out to be higher than the calculated one. The greatest increase is achieved by using a head with finning.
AB - The technology of solid-state light source is associated with the future of a number of sectors of economy. Duration of failure-free operation, optical radiation power and other output characteristics of the LEDs are closely linked with p-n junction temperature, which makes the development of the cooling systems an important step in creating LED systems. In this work, we have created a new type of thermosiphon for studying heat transfer from a local heat source. Boiling heat transfer on the local heaters with the diameter of 1 and 5 mm has been investigated. It is shown that on the finned surfaces overheating relative to the saturation temperature in comparison with a smooth surface decreases up to three times for the heater with the diameter of 5 mm. For finned surfaces on the heater with a diameter of 1 mm, surface overheating relative to the saturation temperature decreases four times. More than three times increase is observed for the heat transfer coefficient on finned surfaces as compared to the smooth ones. It is shown that the value of the critical heat flux (CHF) under the conditions of a large volume of liquid for the heaters with D = 1.6 and 5 mm is in good agreement with the known dependences. Radial finning of the heater has no effect on CHF. The value of CHF for D = 1 mm turns out to be higher than the calculated one. The greatest increase is achieved by using a head with finning.
UR - http://www.scopus.com/inward/record.url?scp=85058215719&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1105/1/012129
DO - 10.1088/1742-6596/1105/1/012129
M3 - Conference article
AN - SCOPUS:85058215719
VL - 1105
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012129
T2 - 34th Siberian Thermophysical Seminar Dedicated to the 85th Anniversary of Academician A. K. Rebrov, STS 2018
Y2 - 27 August 2018 through 30 August 2018
ER -
ID: 17852094