K 94 Kuskov, G. V. Investigation of thermal conductivities of heat pipe wicks [Text] / G. V. Kuskov, Yu. F. Maydanik, V. G. Pastukhov // Heat Transfer - Soviet Research. - 1987. - V. 19, N 6. - P119-128 Рубрики: ФИЗИКА Кл.слова (ненормированные): ПРОВОДИМОСТЬ ТЕРМИЧЕСКАЯ -- ТЕРМИЧЕСКАЯ ПРОВОДИМОСТЬ -- ФИТИЛЬ -- ТРУБА ТЕПЛОВАЯ -- ТЕПЛОВАЯ ТРУБА |
S 71 Some results of loop heat pipes development, tests and application in engineering [Text] / Yu. F. Maydanik, Y. G. Fershtater, S. V. Vershinin, V. G. Pastukhov, K. Goncharov // Proceedings of 5th International Heat Pipe Symposium (Melbourne, Australia, Nov. 17-20, 1996). - 1996. - P406-412 Рубрики: ФИЗИКА Кл.слова (ненормированные): ТРУБА КОНТУРНАЯ -- КОНТУРНАЯ ТРУБА -- ТРУБА ТЕПЛОВАЯ -- ТЕПЛОВАЯ ТРУБА |
L 88 Loop heat pipes and evaporators with advanced characteristics [Text] / Yu. F. Maydanik, S. V. Vershinin, V. G. Pastukhov, D. Gluck, C. Gerhard // Proceedings of the CPL-98 International Workshop on Capillary Pumped Two-Phase Loops (Los Angeles, USA, March 2-3, 1998). - P2. 4-1-2. 4-11 Рубрики: ФИЗИКА Кл.слова (ненормированные): ТРУБА КОНТУРНАЯ -- КОНТУРНАЯ ТРУБА -- ТРУБА ТЕПЛОВАЯ -- ТЕПЛОВАЯ ТРУБА -- ИСПАРИТЕЛИ |
D 67 Dmitrin, V. I. Development and investigation of compact cooler using a pulsating heat pipe / V. I. Dmitrin, Yu. F. Maydanik, V. G. Pastukhov // High Temperature. - 2010. - Vol. 48, № 4. - С. 565-571. - Bibliogr. : с. 571 (16 ref) Рубрики: ФИЗИКА Кл.слова (ненормированные): HEAT PIPE -- WATER -- METHANOL Аннотация: Results are given of development and investigations of a compact cooler for application in electronics, based on an open-loop oscillating heat pipe. The cooler operation is investigated, where water, methanol, and R141b Freon are used as working fluids under conditions of uniform and concentrated heat input. The effective operation of the device is demonstrated in the heat load range from 5 to 250 W. The “heat source-ambient air” minimal thermal resistance of 0.35°C/W was reached with water under uniform heat load of 250 W. The maximal value of heat load density is 75 W/cm2 with the heat flux concentration on the surface of 1 cm2, where methanol is used as working fluid \\\\Expert2\\NBO\\High Temperature\\2010, v. 48, N 4, p.565.pdf |
M 73 Miniature loop heat pipes for electronics cooling / V. G. Pastukhov, Yu. F. Maydanik, S. V. Vershinin, M. A. Korukov // Applied Thermal Engineering : 12th International Heat Pipe Conference Location, Russia, 19-24 may 2002 . - 2003. - Vol.23, № 9. - С. 1125-1135 Рубрики: ФИЗИКА Кл.слова (ненормированные): MINIATURE LOOP HEAT PIPE -- CPU -- THERMAL RESISTANCE Аннотация: The paper is devoted to the development of miniature loop heat pipes (mLHPs) with a nominal capacity of 25-30 W and a heat-transfer distance up to 250 mm intended for cooling electronics components and CPU of mobile PC. It gives the results of investigating several prototypes of mLHPs incorporated into remote heat exchanger (RHE) systems in different conditions. It has been established that in the nominal range of heat loads orientation does not practically affect the mLHPs operating characteristics. Under air cooling the total thermal resistance of such a system is 1.7-4.0degreesC/W and depends strongly on the cooling conditions and the radiator efficiency. In this case the mLHP's own thermal resistance is in the limits from 0.3 to 1.2degreesC/W, and the maximum capacity reaches 80-120 BT. The obtained results make it possible to regard mLHPs as quite promising devices for RHE systems providing thermal regimes for electronics components and personal computers. (C) 2003 Elsevier Science Ltd. All rights reserved |
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 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 |
P 31 Pastukhov, V. G. Development and investigation of a cooler for electronics on the basis of two-phase loop thermosyphons / V. G. Pastukhov, Yu. F. Maydanik, V. I. Dmitrin // Heat Pipe Science and Technology, An International Journal , vol. - Vol.1, №1. - С. 47-57 Рубрики: ФИЗИКА Кл.слова (ненормированные): LOOP THERMOSYPHON -- EVAPORATOR -- CAPILLARY STRUCTURE, Аннотация: The objective of this work was to develop a device for cooling electronic elements with a heat power up to 30 W by its rejection and dissipation in the ambient by free air convection. The device specification assigned the temperature range of the ambient conditions from −40 to +105° C and the available space of 30(W) × 120(H) × 200(L) mm. As a result a hybrid scheme based on a loop thermosyphon was proposed, where the evaporator embodied the capillary structure. In such a scheme, the return working fluid flow was ensured by the combined action of the gravity and capillary forces. Several prototypes with different loop and evaporator designs were tested in laboratory conditions. Water and heptane were used as working fluids. The experiments showed that the role of the capillary structure locally placed in the evaporator can be efficiently implemented by both highly porous cellular materials and capillary grooves made on the evaporating surface. It is also shown that heptane can be effectively used as a working fluid which is appropriate for the temperature range requirements. At the same time the device has good mass-and-size characteristics and total thermal resistance under a nominal heat load of about 1.7° C/W |
L 88 Loop Heat Pipes for Cooling Systems of Servers / Yu. F. Maydanik, S. V. Vershinin, V. G. Pastukhov, S. Fried // IEEE Transactions on Components and Packaging Technologies. - 2010. - Vol.33, №2. - С. 416-423 Рубрики: ФИЗИКА Кл.слова (ненормированные): 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 |
P 30 Passive cooling system for an aircraft electronic box / Yu. F. Maydanik, S. V. Vershinin, V. G. Pastukhov, M. Chernysheva, C. Sarno, C. Tantolin // Heat Pipe Science and Technology, An International Journal , vol. - 2010. - Vol.1, №3. - С. 251-260 Рубрики: ФИЗИКА Кл.слова (ненормированные): AIRCRAFTS -- LOOP HEAT PIPE -- ELECTRONIC BOX -- PASSIVE COOLING SYSTEM Аннотация: The paper represents the results of development and thermal tests of a cooling system of a seat electronic box, managing the in-flight entertainment system used aboard commercial aircrafts. The system is completely passive and consists of two conventional copper-water miniature heat pipes and two miniature loop heat pipes with R-141b as a working fluid. Two crossbeams of a passenger seat made of aluminum alloy cooled by means of free air convection were used as heat sinks. At the maximum heat load of 100 W the cooling system provides a temperature of a cooled object at a level of not above 81°C at the ambient temperature of 22°C, which is 4°C below that of the maximum specified temperature |
P 31 Pastukhov, V. G. Low-noise cooling system for PC on the base of loop heat pipes / V. G. Pastukhov, Yu. F. Maydanik // Applied Thermal Engineering. - 2007. - Vol.27, №5-6. - С. 894-901 Рубрики: ФИЗИКА Кл.слова (ненормированные): COMPUTER COOLING -- LOOP HEAT PIPE -- PASSIVE CPU COOLING SYSTEM Аннотация: The problem of current importance connected with a wide use of personal computers (PC) and a rapid growth of their performance is a decrease in the noise level created at the operation of cooling system fans. One of the possible ways of solving this problem may be the creation of passive or semi-passive systems on the base of loop heat pipes (LHPs) in which the heat sink is an external radiator cooled by natural and/or forced air convection. The paper presents the results of development and tests of several variants of such systems, which are capable of sustaining an operating temperature of 72–78 °C on the heat source thermal interface which dissipates 100 W at an ambient temperature of 22 °C. It is also shown that the use of additional means of active cooling in combination with LHPs allows to increase the value of dissipated heat up to 180 W and to decrease the system thermal resistance down to 0.29 °C/W |
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 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 |
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 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 |
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 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 |
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 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. |
M 43 Maydanik, Yu. F. Investigation of thermal characteristics of high-capacity loop heat pipes after a long-term storage [Electronic resource] / Yu. F. Maydanik, M. A. Chernysheva, V. G. Pastukhov // Energy . - 2014. - Article in press Рубрики: ФИЗИКА Кл.слова (ненормированные): CAPACITY -- HEAT-TRANSFER SYSTEMS -- CAPILLARY STRUCTURE, Аннотация: Repeat thermal tests of two high-capacity LHPs (loop heat pipes) have been conducted after their long-term storage under normal conditions. The first of them 1820 mm long with a capacity of 1200 W and water as a working fluid was made and first tested in 1985. The other device with a length of 2750 mm and a capacity of 800 W, which consisted of two ammonia LHPs joined in series, was made and tested for the first time in 1988. Both the devices were made of stainless steel and equipped with a titanium and nickel capillary structures. The tests, which were conducted in conditions similar to the initial ones, have shown that a long-term storage has not had any considerable impact on the LHP thermal characteristics. Such devices may be used in systems of utilization of low-potential heat and solar energy, and also for heating and cooling various objects \\\\expert2\\nbo\\Energy\\2014, v. 74, p. 804-809.pdf |
M 43 Maydanik, Yu. F. Review: Loop heat pipes with flat evaporators [Electronic resource] / Yu. F. Maydanik, M. A. Chernysheva, V. G. Pastukhov. - [Б. м. : б. и.]. - Систем. требования: http://www.scopus.com/record/display.url?eid=2-s2.0-84898450074&origin=resultslist&sort=plf-f&src=s&st1=Maydanik&st2=YU.+F. - 27.08.2014. - Bibliogr. : p. 306-307 (60 ref.). - Б. ц. Рубрики: ФИЗИКА Кл.слова (ненормированные): ELECTRONICS COOLING -- LOOP HEAT PIPE -- FLAT EVAPORATOR Аннотация: The paper contains an analytical review of developments, results of tests and simulation of loop heat pipes (LHPs) with disk-shaped, rectangular and flat-oval evaporators. Two main directions have been noted in the development of flat evaporators, which may be arbitrarily separated into evaporators with opposite replenishment (EORs) and evaporators with longitudinal replenishment (ELRs). The bodies of such evaporators are made of stainless steel, copper, aluminum. For making wicks use is made of sintered powders and mesh of stainless steel, nickel, titanium, copper, polytetrafluoroethylene (PTFE) and ceramics. Monoporous and biporous capillary structures are considered. Water, ammonia, methanol, ethanol, and acetone have been tested as working fluids. The best results were shown by the combination "copper-copper-water" at temperatures above 70 °C, when on trials an evaporator thermal resistance of less than 0.01°C/W and a heat flux close to 1000 W/cm2 were achieved. For temperatures below 70°C the most efficient combination is "stainless steel-nickel-ammonia". |
Maydanik, Yu. F. Review: loop heat pipes with flat evaporators [Electronic resource] / Yu. F. Maydanik, M. A. Chemysheva, V. G. Pastukhov // Applied Thermal Engineering. - 2014. - Vol.67, № 1-2. - С. 294-307. - Bibliogr. : p. 306-307 (59 ref) \\\\expert2\\NBO\\Applied Thermal Engineering\\2014, v. 67, Т 1-2. p. 294-307.pdf |
K 94 Kuskov, G. V. Investigation of thermal conductivities of heat pipe wicks [Text] / G. V. Kuskov, Yu. F. Maydanik, V. G. Pastukhov // Heat Transfer - Soviet Research. - 1987. - V. 19, N 6. - P119-128 Рубрики: ФИЗИКА Кл.слова (ненормированные): ПРОВОДИМОСТЬ ТЕРМИЧЕСКАЯ -- ТЕРМИЧЕСКАЯ ПРОВОДИМОСТЬ -- ФИТИЛЬ -- ТРУБА ТЕПЛОВАЯ -- ТЕПЛОВАЯ ТРУБА |
S 71 Some results of loop heat pipes development, tests and application in engineering [Text] / Yu. F. Maydanik, Y. G. Fershtater, S. V. Vershinin, V. G. Pastukhov, K. Goncharov // Proceedings of 5th International Heat Pipe Symposium (Melbourne, Australia, Nov. 17-20, 1996). - 1996. - P406-412 Рубрики: ФИЗИКА Кл.слова (ненормированные): ТРУБА КОНТУРНАЯ -- КОНТУРНАЯ ТРУБА -- ТРУБА ТЕПЛОВАЯ -- ТЕПЛОВАЯ ТРУБА |
L 88 Loop heat pipes and evaporators with advanced characteristics [Text] / Yu. F. Maydanik, S. V. Vershinin, V. G. Pastukhov, D. Gluck, C. Gerhard // Proceedings of the CPL-98 International Workshop on Capillary Pumped Two-Phase Loops (Los Angeles, USA, March 2-3, 1998). - P2. 4-1-2. 4-11 Рубрики: ФИЗИКА Кл.слова (ненормированные): ТРУБА КОНТУРНАЯ -- КОНТУРНАЯ ТРУБА -- ТРУБА ТЕПЛОВАЯ -- ТЕПЛОВАЯ ТРУБА -- ИСПАРИТЕЛИ |