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1.

Вид документа :
Шифр издания : 53/S 82
Автор(ы) : Becker S., Vershinin S. V., Sartre V., Laurien E., Bonjour J., Maydanik Yu. F.
Заглавие : Steady state operation of a copper–water LHP with a flat-oval evaporator
Место публикации : Applied Thermal Engineering. - 2011. - Vol.31, №5. - С. 686-695
Примечания : Библиогр.: с. 695 (24 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): loop heat pipe--heat trahsfer--experimental study
Аннотация: In order to dissipate the heat generated by electronic boxes in avionic systems, a copper–water LHP with a flat-oval evaporator was fabricated and tested at steady state. The LHP consists of a flat shaped evaporator, 7 mm thick, including compensation chamber with attached heat exchanger. The condenser is cooled by forced convection of liquid. The variable parameters are the heat sink and ambient temperatures (20 and 55 °C), the orientation (−90° to +90° in two perpendicular planes) and the power input (0–100 W). Evaporator wall temperatures are higher when the evaporator is placed above the condenser. For heat sink and ambient temperature of 20 °C the evaporator wall temperature does not vary much with heat load for all measured elevations. But it fluctuates at heat sink and ambient temperature equal to 55 °C when the evaporator is placed below the condenser. The LHP total thermal resistance is governed by the condenser resistance. It decreases with increasing heat load, whatever the operating conditions, because the part of the condenser internal surface area used for condensation increases too. A minimum thermal resistance of 0.2 K/W was obtained. The maximum thermal resistance was 2.7 K/W
\\\\expert2\\NBO\\Applied Thermal Engineering\\2011, v. 31, p.686.pdf
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2.

Вид документа :
Шифр издания : 53/S 82
Автор(ы) : Becker S., Vershinin S. V., Sartre V., Laurien E., Bonjour J., Maydanik Yu. F.
Заглавие : Steady state operation of a copper–water LHP with a flat-oval evaporator
Место публикации : Applied Thermal Engineering. - 2011. - Vol.31, №5. - С. 686-695
Примечания : Библиогр.: с. 695 (24 ref.)
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): loop heat pipe--heat trahsfer--experimental study
Аннотация: In order to dissipate the heat generated by electronic boxes in avionic systems, a copper–water LHP with a flat-oval evaporator was fabricated and tested at steady state. The LHP consists of a flat shaped evaporator, 7 mm thick, including compensation chamber with attached heat exchanger. The condenser is cooled by forced convection of liquid. The variable parameters are the heat sink and ambient temperatures (20 and 55 °C), the orientation (−90° to +90° in two perpendicular planes) and the power input (0–100 W). Evaporator wall temperatures are higher when the evaporator is placed above the condenser. For heat sink and ambient temperature of 20 °C the evaporator wall temperature does not vary much with heat load for all measured elevations. But it fluctuates at heat sink and ambient temperature equal to 55 °C when the evaporator is placed below the condenser. The LHP total thermal resistance is governed by the condenser resistance. It decreases with increasing heat load, whatever the operating conditions, because the part of the condenser internal surface area used for condensation increases too. A minimum thermal resistance of 0.2 K/W was obtained. The maximum thermal resistance was 2.7 K/W
\\\\expert2\\NBO\\Applied Thermal Engineering\\2011, v. 31, p.686.pdf
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3.

Вид документа :
Шифр издания : 53/S 34
Автор(ы) : Schmelzer J. W. P., Baidakov V. G.
Заглавие : Kinetics of Condensation and Boiling: Comparison of Different Approaches
Место публикации : Journal of Physical Chemistry B. - 2001. - Vol.105, №47. - С. 11595-11604
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical cluster --gibbs' method--van-der-waals method --hilliard method
Аннотация: A comparative analysis of the results of determination of the work of critical cluster formation in nucleation theory for three different methods of evaluationGibbs' method (employing the capillarity approximation), the van der Waals−Cahn and Hilliard method, and a newly developed modified Gibbs approachis given. As a particular application, the processes of condensation and boiling in one-component fluids are analyzed. As a model system for comparison, van der Waals fluids are chosen. In addition to the work of critical cluster formation, the bulk properties of the critical clusters (drops or bubbles), their characteristic sizes, and the values of the surface tension are determined in dependence on the initial supersaturation in the system or, equivalently, on the size of the critical clusters. It is shown that latter two mentioned methods of determination of the work of critical cluster formation (the van der Waals−Cahn & Hilliard and the modified Gibbs approach) leadat least for the model system consideredto qualitatively and partly quantitatively equivalent results. Nevertheless, differences remain which may lead to quantitative deviations when applied to the determination of the steady-state nucleation rates and further basic characteristics of nucleation-growth processes. The possible origin of such deviations is discussed, and some further directions of analysis are anticipated
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4.

Вид документа :
Шифр издания : 53/S 34
Автор(ы) : Schmelzer J. W. P., Baidakov V. G.
Заглавие : Kinetics of Condensation and Boiling: Comparison of Different Approaches
Место публикации : Journal of Physical Chemistry B. - 2001. - Vol.105, №47. - С. 11595-11604
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical cluster --gibbs' method--van-der-waals method --hilliard method
Аннотация: A comparative analysis of the results of determination of the work of critical cluster formation in nucleation theory for three different methods of evaluationGibbs' method (employing the capillarity approximation), the van der Waals−Cahn and Hilliard method, and a newly developed modified Gibbs approachis given. As a particular application, the processes of condensation and boiling in one-component fluids are analyzed. As a model system for comparison, van der Waals fluids are chosen. In addition to the work of critical cluster formation, the bulk properties of the critical clusters (drops or bubbles), their characteristic sizes, and the values of the surface tension are determined in dependence on the initial supersaturation in the system or, equivalently, on the size of the critical clusters. It is shown that latter two mentioned methods of determination of the work of critical cluster formation (the van der Waals−Cahn & Hilliard and the modified Gibbs approach) leadat least for the model system consideredto qualitatively and partly quantitatively equivalent results. Nevertheless, differences remain which may lead to quantitative deviations when applied to the determination of the steady-state nucleation rates and further basic characteristics of nucleation-growth processes. The possible origin of such deviations is discussed, and some further directions of analysis are anticipated
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5.

Вид документа :
Шифр издания : 53/L 88
Автор(ы) : Maydanik Yu. F., Vershinin S. V., Pastukhov V. G., Fried S.
Заглавие : Loop Heat Pipes for Cooling Systems of Servers
Место публикации : IEEE Transactions on Components and Packaging Technologies. - 2010. - Vol.33, №2. - С. 416-423
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): heat-transfer device--lhps --opteron cpus
Аннотация: Loop heat pipes (LHPs) are exceptionally efficient heat-transfer devices that employ a closed loop evaporation-condensation cycle that can be used to cool densely packed electronic systems that reject large quantities of heat, including computers and their central processing units (CPUs). Tests were carried out on miniature ammonia LHPs with a CPU thermal simulator using different ways of condenser cooling. The possibility of maintaining the cooled object temperatures between 40°C and 70°C with heat load changing from 100 to 320 W was demonstrated. Subsequent tests of these devices in a 1U computer with dual core advanced micro devices Opteron CPUs, dissipating between 95 and 120 W, have confirmed the advantages and heat transfer efficiency of LHP-based cooling systems used to cool CPU in 1U chassis
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6.

Вид документа :
Шифр издания : 53/L 88
Автор(ы) : Maydanik Yu. F., Vershinin S. V., Pastukhov V. G., Fried S.
Заглавие : Loop Heat Pipes for Cooling Systems of Servers
Место публикации : IEEE Transactions on Components and Packaging Technologies. - 2010. - Vol.33, №2. - С. 416-423
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): heat-transfer device--lhps --opteron cpus
Аннотация: Loop heat pipes (LHPs) are exceptionally efficient heat-transfer devices that employ a closed loop evaporation-condensation cycle that can be used to cool densely packed electronic systems that reject large quantities of heat, including computers and their central processing units (CPUs). Tests were carried out on miniature ammonia LHPs with a CPU thermal simulator using different ways of condenser cooling. The possibility of maintaining the cooled object temperatures between 40°C and 70°C with heat load changing from 100 to 320 W was demonstrated. Subsequent tests of these devices in a 1U computer with dual core advanced micro devices Opteron CPUs, dissipating between 95 and 120 W, have confirmed the advantages and heat transfer efficiency of LHP-based cooling systems used to cool CPU in 1U chassis
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7.

Вид документа :
Шифр издания : 53/F 17
Автор(ы) : Faizullin M. Z., Koverda V. P.
Заглавие : Vitrification and crystallization of low-temperature amorphous condensates of water and methane-water mixture
Место публикации : Russian Journal of Physical Chemistry A. - 2012. - Vol.86, №2. - С. 229-234
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): vitrification--crystallization--gas hydrates
Аннотация: Low-temperature condensates of water and water-methane mixture are studied in the temperature range of 65-200 K. Amorphous samples are obtained by molecular beam deposition under vacuum conditions on the substrate cooled with liquid nitrogen. The vitrification and crystallization temperatures are determined from the changes in the dielectric properties of the condensates upon heating. The kinetics of crystallization of amorphous water layers is studied by differential thermal analysis. The temperature conditions for the growth of thick methane crystalline hydrate layers during the low-temperature condensation of molecular water-gas mixture beams are found
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8.

Вид документа :
Шифр издания : 53/F 17
Автор(ы) : Faizullin M. Z., Koverda V. P.
Заглавие : Vitrification and crystallization of low-temperature amorphous condensates of water and methane-water mixture
Место публикации : Russian Journal of Physical Chemistry A. - 2012. - Vol.86, №2. - С. 229-234
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): vitrification--crystallization--gas hydrates
Аннотация: Low-temperature condensates of water and water-methane mixture are studied in the temperature range of 65-200 K. Amorphous samples are obtained by molecular beam deposition under vacuum conditions on the substrate cooled with liquid nitrogen. The vitrification and crystallization temperatures are determined from the changes in the dielectric properties of the condensates upon heating. The kinetics of crystallization of amorphous water layers is studied by differential thermal analysis. The temperature conditions for the growth of thick methane crystalline hydrate layers during the low-temperature condensation of molecular water-gas mixture beams are found
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9.

Вид документа :
Шифр издания : 53/F 17
Автор(ы) : Faizullin M. Z., Reshetnikov A. V., Koverda V. P.
Заглавие : Synthesis of methane hydrate at low-temperature condensation of molecular beams
Место публикации : Doklady Physics. - 2010. - Vol.55, №8. - С. 388-390
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): amorphous solid water--ice
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10.

Вид документа :
Шифр издания : 53/F 17
Автор(ы) : Faizullin M. Z., Reshetnikov A. V., Koverda V. P.
Заглавие : Synthesis of methane hydrate at low-temperature condensation of molecular beams
Место публикации : Doklady Physics. - 2010. - Vol.55, №8. - С. 388-390
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): amorphous solid water--ice
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