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1.
Инвентарный номер: нет.
   
   P 31


    Pastukhov, V. G.
    Active coolers based on copper–water LHPs for desktop PC / V. G. Pastukhov, Yu. F. Maydanik // Applied Thermal Engineering. - 2009. - Vol.29, №14-15. - С. 3140-3143
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LOOP HEAT PIPE -- COOLER -- THERMAL RESISTANCE
Аннотация: The paper is devoted to the development of active coolers for central processing units (CPU) of desktop computers on the basis of copper–water loop heat pipes (LHP). It presents descriptions of designs and test results for two cooler models containing flat evaporators and condensers of the collector type equipped with a heat sink (radiator). Heat was removed from the radiators by forced convection. It is shown that the maximum heat-transfer capacity of the coolers was 500–600 W. Minimum values of the total thermal resistance of the coolers were equal to 0.15–0.17 °С/W at heat loads of 500 and 250 W, respectively. On the basis of an analysis of distribution of local thermal resistances it has been concluded that additional decrease in the thermal resistance required for cooling a CPU with a generated thermal capacity in excess of 150 W can be achieved at the cost of optimization of radiator design and (or) an increase in the intensity of its cooling

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2.
Инвентарный номер: нет.
   
   P 31


    Pastukhov, V. G.
    Active coolers based on copper–water LHPs for desktop PC / V. G. Pastukhov, Yu. F. Maydanik // Applied Thermal Engineering. - 2009. - Vol.29, №14-15. - С. 3140-3143
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LOOP HEAT PIPE -- COOLER -- THERMAL RESISTANCE
Аннотация: The paper is devoted to the development of active coolers for central processing units (CPU) of desktop computers on the basis of copper–water loop heat pipes (LHP). It presents descriptions of designs and test results for two cooler models containing flat evaporators and condensers of the collector type equipped with a heat sink (radiator). Heat was removed from the radiators by forced convection. It is shown that the maximum heat-transfer capacity of the coolers was 500–600 W. Minimum values of the total thermal resistance of the coolers were equal to 0.15–0.17 °С/W at heat loads of 500 and 250 W, respectively. On the basis of an analysis of distribution of local thermal resistances it has been concluded that additional decrease in the thermal resistance required for cooling a CPU with a generated thermal capacity in excess of 150 W can be achieved at the cost of optimization of radiator design and (or) an increase in the intensity of its cooling

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3.
Инвентарный номер: нет.
   
   P 31


    Pastukhov, V. G.
    Adaptation of loop heat pipes to zero-g conditions / V. G. Pastukhov, Yu. F. Maydanik, Y. G. Fershtater // 6th European Symposium on Space Environmental Control Systems: Noordwijk, Netherlands, 20-22 may 1997 . - 1997. - Vol.400. - С. 385-391
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LOOP HEAT PIPES -- HEAT-TRANSPORT -- THERMOCAPILLARY PHENOMENA
Аннотация: Loop heat pipes (LHPs) posses a great variety of valuable properties, which make them quite promising for application both on the Earth and in space. Among these are the LHP high heat-transport capacity at an any orientation in the field of mass forces, good mass-and-size parameters and the possibility of an arbitrary configuration of transport lines. At the same time such a drawback of LHPs of the conventional type as the instability of start up and operation in the region of low heat loads reduces their performance. The problem is connected, in a general case, with the unfavourable distribution of the vapor and the liquid phases of the working fluid in the evaporator. There is reason to believe that the LHP operation can also be significantly affected by zero-g conditions, in which the distribution of a working fluid is pre-determined only by the action of surface forces and the thermocapillary phenomena. The paper performs a general analysis of the necessary conditions imposed on the construction of LHP and some designs that contribute to the retention of serviceability in zero-g conditions at low heat loads. It gives the results of laboratory investigations of an adapted ammonia LHP with a heat-transfer capacity up to 2 kWxm

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4.
Инвентарный номер: нет.
   
   P 31


    Pastukhov, V. G.
    Adaptation of loop heat pipes to zero-g conditions / V. G. Pastukhov, Yu. F. Maydanik, Y. G. Fershtater // 6th European Symposium on Space Environmental Control Systems: Noordwijk, Netherlands, 20-22 may 1997 . - 1997. - Vol.400. - С. 385-391
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LOOP HEAT PIPES -- HEAT-TRANSPORT -- THERMOCAPILLARY PHENOMENA
Аннотация: Loop heat pipes (LHPs) posses a great variety of valuable properties, which make them quite promising for application both on the Earth and in space. Among these are the LHP high heat-transport capacity at an any orientation in the field of mass forces, good mass-and-size parameters and the possibility of an arbitrary configuration of transport lines. At the same time such a drawback of LHPs of the conventional type as the instability of start up and operation in the region of low heat loads reduces their performance. The problem is connected, in a general case, with the unfavourable distribution of the vapor and the liquid phases of the working fluid in the evaporator. There is reason to believe that the LHP operation can also be significantly affected by zero-g conditions, in which the distribution of a working fluid is pre-determined only by the action of surface forces and the thermocapillary phenomena. The paper performs a general analysis of the necessary conditions imposed on the construction of LHP and some designs that contribute to the retention of serviceability in zero-g conditions at low heat loads. It gives the results of laboratory investigations of an adapted ammonia LHP with a heat-transfer capacity up to 2 kWxm

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5.
Инвентарный номер: нет.
   
   C 51


    Chernysheva, M. A.
    Analysis of heat exchange in the compensation chamber of a loop heat pipe [Электронный ресурс] / M. A. Chernysheva, V. G. Pastukhov, Yu. F. Maydanik // Energy . - 2013. - Article in Press
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
COMPENSATION CHAMBER -- FLAT EVAPORATOR -- HEAT-AND-MASS TRANSFER -- LOOP HEAT PIPES
Аннотация: A three-dimensional heat-and-mass transfer model of a flat evaporator of a loop heat pipe has been developed for investigating heat-and-mass in a compensation chamber filled with a liquid. Numerical simulation was implemented using EFDLab® software package in order to predict the temperature distribution of the flat evaporator of a copper-water LHP (loop heat pipe) as well as the flow streamline and velocity field in the compensation chamber as a function of heat load. A computer simulation makes it possible to evaluate the heat exchange at the inner surface of the compensation chamber. Heat exchange data were used as a boundary condition in researching the problem of the drying effect of a wick and a transformation of the evaporating front in the active zone of the flat evaporator. © 2013 Elsevier Ltd. All rights reserved

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6.
Инвентарный номер: нет.
   
   C 51


    Chernysheva, M. A.
    Analysis of heat exchange in the compensation chamber of a loop heat pipe [Электронный ресурс] / M. A. Chernysheva, V. G. Pastukhov, Yu. F. Maydanik // Energy . - 2013. - Article in Press
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
COMPENSATION CHAMBER -- FLAT EVAPORATOR -- HEAT-AND-MASS TRANSFER -- LOOP HEAT PIPES
Аннотация: A three-dimensional heat-and-mass transfer model of a flat evaporator of a loop heat pipe has been developed for investigating heat-and-mass in a compensation chamber filled with a liquid. Numerical simulation was implemented using EFDLab® software package in order to predict the temperature distribution of the flat evaporator of a copper-water LHP (loop heat pipe) as well as the flow streamline and velocity field in the compensation chamber as a function of heat load. A computer simulation makes it possible to evaluate the heat exchange at the inner surface of the compensation chamber. Heat exchange data were used as a boundary condition in researching the problem of the drying effect of a wick and a transformation of the evaporating front in the active zone of the flat evaporator. © 2013 Elsevier Ltd. All rights reserved

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7.
Инвентарный номер: нет.
   
   P 31


    Pastukhov, V. G.
    Combined LHP and PHP based heat-transfer system / V. G. Pastukhov, Yu. F. Maydanik // International Journal of Thermal Science. - 2013. - Vol.74. - С. 81-85
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
HEAT-TRANSFER SYSTEM -- LOOP HEAT PIPE -- PULSATING HEAT PIPE
Аннотация: The paper presents the results of development and experimental investigation of a heat-transfer system consisting of a pulsating and a loop heat pipe. The pulsating heat pipe (PHP) was made of a copper capillary tube 2 mm in diameter and located on an aluminum plate measuring 260 × 200 × 1 mm, had a thermal contact with the evaporator interface of a loop heat pipe (LHP) 0.6 m long. The working fluid of the PHP was R141b. The LHP was filled with ammonia. A heat-load source measuring 200 × 200 mm was located on the PHP, and its heat was transferred to the LHP evaporator. Tests were conducted at different orientations in the gravity field at heat loads from 10 to 170 W and heat-sink temperatures from −20 to +20 °C. A minimum value of thermal resistance equal to 0.28 °C/W was achieved in the heat load range from 50 to 90 W.

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8.
Инвентарный номер: нет.
   
   P 31


    Pastukhov, V. G.
    Combined LHP and PHP based heat-transfer system / V. G. Pastukhov, Yu. F. Maydanik // International Journal of Thermal Science. - 2013. - Vol.74. - С. 81-85
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
HEAT-TRANSFER SYSTEM -- LOOP HEAT PIPE -- PULSATING HEAT PIPE
Аннотация: The paper presents the results of development and experimental investigation of a heat-transfer system consisting of a pulsating and a loop heat pipe. The pulsating heat pipe (PHP) was made of a copper capillary tube 2 mm in diameter and located on an aluminum plate measuring 260 × 200 × 1 mm, had a thermal contact with the evaporator interface of a loop heat pipe (LHP) 0.6 m long. The working fluid of the PHP was R141b. The LHP was filled with ammonia. A heat-load source measuring 200 × 200 mm was located on the PHP, and its heat was transferred to the LHP evaporator. Tests were conducted at different orientations in the gravity field at heat loads from 10 to 170 W and heat-sink temperatures from −20 to +20 °C. A minimum value of thermal resistance equal to 0.28 °C/W was achieved in the heat load range from 50 to 90 W.

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9.
Инвентарный номер: нет.
   
   M 43


    Maydanik, Yu. F.
    Compact cooler for electronics on the basis of a pulsating heat pipe / Yu. F. Maydanik, V. I. Dmitrin, V. G. Pastukhov // Applied Thermal Engineering. - 2009. - Vol.29, №17-18. - С. 3511-3517
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
PULSATING HEAT PIPE -- ELECTRONICS COOLING -- HEAT LOAD
Аннотация: The paper presents the results of developing and investigating a compact cooler for electronics made on the basis of a closed loop pulsating heat pipe (CLPHP). The cooler is made of a copper tube 5.6 m long with OD of 2 mm and ID of 1.2 mm in the form a 3D spiral containing 17 turns. The device is equipped with a light copper radiator with a finning area of 1670 cm2, which was blown by an axial fan located inside the spiral. The thermal interface of the cooler situated in the heating zone is made of a copper plate with a thermocontact surface measuring 40 × 35 mm, which was in thermal contact with all the turns of the device. The cooler overall dimensions are 105 × 100 × 60 mm, its mass is 350 g. The operation of the cooler has been investigated with water, methanol and R141b as working fluids at a uniform and concentrated supply of a heat load in different heating modes. A reliable operation of the device has been demonstrated in the range of heat loads from 5 to 250 W. A minimum thermal resistance “heat source–ambient air” equal to 0.32 °C/W was attained with water and methanol as working fluids at a uniform heat load of 250 W. With a heat load concentrated on a section of the thermal interface limited by an area of 1 cm2, a minimum value of thermal resistance equal to 0.62 °C/W was attained at a heat load of 125 W when methanol was used as a working fluid

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10.
Инвентарный номер: нет.
   
   M 43


    Maydanik, Yu. F.
    Compact cooler for electronics on the basis of a pulsating heat pipe / Yu. F. Maydanik, V. I. Dmitrin, V. G. Pastukhov // Applied Thermal Engineering. - 2009. - Vol.29, №17-18. - С. 3511-3517
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
PULSATING HEAT PIPE -- ELECTRONICS COOLING -- HEAT LOAD
Аннотация: The paper presents the results of developing and investigating a compact cooler for electronics made on the basis of a closed loop pulsating heat pipe (CLPHP). The cooler is made of a copper tube 5.6 m long with OD of 2 mm and ID of 1.2 mm in the form a 3D spiral containing 17 turns. The device is equipped with a light copper radiator with a finning area of 1670 cm2, which was blown by an axial fan located inside the spiral. The thermal interface of the cooler situated in the heating zone is made of a copper plate with a thermocontact surface measuring 40 × 35 mm, which was in thermal contact with all the turns of the device. The cooler overall dimensions are 105 × 100 × 60 mm, its mass is 350 g. The operation of the cooler has been investigated with water, methanol and R141b as working fluids at a uniform and concentrated supply of a heat load in different heating modes. A reliable operation of the device has been demonstrated in the range of heat loads from 5 to 250 W. A minimum thermal resistance “heat source–ambient air” equal to 0.32 °C/W was attained with water and methanol as working fluids at a uniform heat load of 250 W. With a heat load concentrated on a section of the thermal interface limited by an area of 1 cm2, a minimum value of thermal resistance equal to 0.62 °C/W was attained at a heat load of 125 W when methanol was used as a working fluid

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