SU823811A1

SU823811A1 - Heat pipe evaporating chamber

Info

Publication number: SU823811A1
Application number: SU792796683A
Authority: SU
Inventors: Юрий Федорович Герасимов; Валерий Михайлович Кисеев; Юрий Фольевич Майданик; Александр Семенович Непомнящий; Юрий Евгеньевич Долгирев
Original assignee: Уральский Ордена Трудового Красногознамени Политехнический Институт Им.C.M.Кирова
Priority date: 1979-07-11
Filing date: 1979-07-11
Publication date: 1981-04-23

Description

Изобретение относится к теплотехнике, а именно к испарительным камерам тепловой‘трубы.The invention relates to heat engineering, namely to the evaporation chambers of a heat pipe.

Известны испарительные камеры тепловой трубы, работающей в поле сил 5 тяжести в условиях различной ориентации, содержащие капиллярно-пористую цилиндрическую насадку с центральной выемкой со стороны ковденса- _ топровода и глухими пароотводящими ·θ каналами по периферии, выходы из которых открыты в сторону паропровода [1ЬKnown are the evaporation chambers of a heat pipe operating in a field of forces of 5 gravity under conditions of different orientations, containing a capillary-porous cylindrical nozzle with a central recess from the side of the codens- _ duct and blind steam outlet ducts θ along the periphery, the exits of which are open towards the steam pipeline [1b

Недостатком известных камер является их малая эксплуатационная надеж-15 ность и экономичность при больших тепловых нагрузках, вследствие высокого перегрева насадки и закипания в связи с этим жидкого теплоносителя на пути его подвода к теплопередаю- 20 щей поверхности камеры.A disadvantage of the known chambers is their low operational reliability and efficiency at high heat loads, due to the high overheating of the nozzle and the boiling of the liquid coolant in the way of its supply to the heat transfer surface of the chamber.

Целью изобретения является повышение эксплуатационной надежности и экономичности трубы при высоких тепловых нагрузках. 25The aim of the invention is to increase the operational reliability and profitability of the pipe at high thermal loads. 25

Указанная цель достигается тем, что насадка выполнена в виде двух концентрично размещенных стаканов, внешний из которых имеет мелкопористую структуру, а внутренний - круп- 3( нопористую и на боковой поверхности снабжен дополнительными пароотводящими каналами, открытыми со стороны, противоположной выходам из основных пароотводящих каналов. >This goal is achieved by the fact that the nozzle is made in the form of two concentrically placed glasses, the outer of which has a finely porous structure, and the inner one has a large-3 (not porous and on the side surface is equipped with additional steam exhaust channels open from the side opposite to the exits from the main steam exhaust channels. >

На фиг. 1 схематично представлена предлагаемая камера; на фиг. 2 - разрез А-А на фиг. 1.In FIG. 1 schematically shows the proposed camera; in FIG. 2 is a section AA in FIG. 1.

Камера содержит капиллярно-пористую насадку, выполненную из стакана 1 с мелкопористой структурой и стакана 2 с крупнопористой структурой, в котором выполнена выемка 3 со стороны конденсатопровода 4, а в стакане 1 - глухие пароотводящие каналы 5, выходы из которых открыты в сторону паропровода 6, на боковой поверхности стакана 2 имеются дополнительные пароотводящие каналы 7, открытые со стороны, противоположной выходам из основных пароотводящих каналов 5, корпус 8 испарительной камеры с заправочным патрубком 9 на нем.The chamber contains a capillary-porous nozzle made of a glass 1 with a finely porous structure and a glass 2 with a large-porous structure, in which a recess 3 is made on the side of the condensate line 4, and in the glass 1 there are blind steam vent channels 5, the exits of which are open towards the steam line 6, on the side surface of the cup 2 there are additional steam outlet channels 7 open from the side opposite to the exits from the main steam outlet channels 5, the housing 8 of the evaporation chamber with a filling pipe 9 on it.

Работа камеры осуществляется следующим образом.The camera is as follows.

Жидкость из конденсационной камеры (на чертеже не показана) по конденсатопроводу 4 поступает в выемкуThe liquid from the condensation chamber (not shown in the drawing) through the condensate line 4 enters the recess

3, откуда по порам стаканов 2 и 1 подводится к корпусу 8, на котором закипает под действием подводящего к нему с внешней стороны теплового потока.3, from where, through the pores of the glasses 2 and 1, it is led to the body 8, on which it boils under the action of the heat flux leading to it from the outside.

Образующиеся пары жидкости отводятся по пароотводящим каналам 5' к паропроводу б и через последний - в , конденсационную камеру трубы. При высокий тепловых нагрузках исвязанных с ними перегревах насадки, на границах стаканов 1 и 2 возможно закипание жидкости и образование паровых мешков, противодействующих нормальному подходу жидкости из выемки 3 к внутренней поверхности корпуса 8. Для локализации этого явления на внешней поверхности стакана 2 выполнены дополнительные пароотводящие ка-15 налы 7, выходы из которых направлены в противоположную сторону выходам из каналов 5. Такое выполнение испарительной камеры позволяет поддержать · в ней заданную изотермичность без 20 ухудшения работы при возрастании тепловых нагрузок.The resulting liquid vapor is discharged through the steam exhaust channels 5 'to the steam line b and through the latter to c, the condensation chamber of the pipe. At high thermal loads of the nozzle overheating associated with them, at the boundaries of the glasses 1 and 2, liquid boiling and formation of steam bags are possible that counteract the normal approach of the liquid from the recess 3 to the inner surface of the housing 8. For the localization of this phenomenon, additional vapor discharge pipes -15 channels 7, the exits from which are directed in the opposite direction to the exits from channels 5. Such an embodiment of the evaporation chamber allows to maintain the specified isothermality in it without 20 working with increasing thermal loads.

Экономическая эффективность достигается снижением металлоемкости тепловой трубы вследствие возможности 25 передачи более высоких тепловых потоков, а максимальное отклонение эффективных диаметров пор внутреннего стакана к внешнему должно равняться от ношению высоты трубы к высоте внутреннего стакана.Economic efficiency is achieved by reducing the metal consumption of the heat pipe due to the possibility of 25 transfer of higher heat fluxes, and the maximum deviation of the effective pore diameters of the inner cup to the outer should be equal to the wearing height of the pipe to the height of the inner cup.

Claims

The invention relates to heat engineering, namely to evaporation chambers of a heat pipe. Evaporative chambers of a heat pipe operating in a field of gravity under conditions of different orientations are known. They contain a capillary-porous cylindrical nozzle with a central notch on the side of the condensate line and deaf vapor-discharge channels on the periphery, the outlets of which are open towards the steam pipeline chambers is their low operational reliability and efficiency at high heat loads, due to high overheating of the nozzle and closure of the heat-transfer fluid on the way supply to the heat transfer surface of the chamber. The aim of the invention is to increase the operational reliability and efficiency of the pipe at high heat loads. This goal is achieved by the fact that the nozzle is made in the form of two concentrically arranged glasses, the outer of which has a finely porous structure, and the inner one is large-porous and is provided on the side surface with additional steam exhaust channels, open from the side, and opposite outlet outlets from the main steam exhaust pipes. channels. FIG. 1 schematically shows the proposed camera; in fig. 2 shows section A-A in FIG. 1. The chamber contains a capillary-porous nozzle, made of cup 1 with a fine porous structure and cup 2 with a large pore structure, in which notch 3 is made on the side of condensate line 4, and in glass 1 - deaf steam tailings 5, the outlets of which are open the side of the steam line 6, on the side surface of the cup 2, there are additional steam discharge channels 7, open on the side opposite to the outlets from the main steam discharge channels 5, the body 8 of the evaporation chamber with the filling nozzle 9 on it. The camera is operated as follows. The liquid from the condensation chamber of the first chamber (not shown in the drawing) enters the condensate line 4 into the recess 3, from where it travels through the pores of the glasses 2 and 1 to the housing 8, where it boils under the action of heat flow from the outside. The formation of liquid vapors is discharged through the vapor extraction channels 5 to the steam pipeline b and through the last one - c; The sensing chamber of the pipe. With high heat loads and nozzle overheating associated with them, fluid may boil and steam bags form at the boundaries of glasses 1 and 2, and the normal approach of the liquid from cavity 3 to the inner surface of the housing 8 is prevented to localize this phenomenon on the outer surface of the glass 2 channels 7, the outlets of which are directed in the opposite direction to the outlets from channels 5. This embodiment of the evaporation chamber makes it possible to maintain a given isothermality in it without degrading Eni works with increasing tep lauryl loads. The economic efficiency is achieved by reducing the metal intensity of the heat pipe due to the possibility of transferring higher heat fluxes, and the maximum deviation of the effective pore diameters of the internal to the external should be equal to the ratio of the height of the pipe to the height of the internal glass. The invention Evaporative chamber of a heat pipe operating in a field of gravity under conditions of different orientations, co. holding a capillary-porous cylindrical nozzle with a central notch on the side of the condensate line and deaf steam outlets along the periphery, the outlets of which are open to the side of the steam line, characterized in that, in order to increase operational reliability and efficiency with high heat loads, the nozzle is made in the form of two concentrically arranged glasses, the outer of which has a fine-pore structure, and the inner large-pore and on the lateral surface is provided with additional vapor discharge channels and, open from the side opposite to the exits from the main steam discharge channels. Information sources, taken into account during the examination 1. USSR Copyright Certificate №556307, cl. F 28 D 15/00, 1977.

/

FIG.