SU1265455A1 - Stand for testing heat pipes - Google Patents

Abstract

TEST BENCH OF HEAT OUT PIPES, containing a supply tank installed in the coolant circuit, inside which is placed a measuring tank with upper and lower nozzles, equipped from the outside with a jacket connected to the auxiliary circulation circuit of a thermostatted medium, and a shell having a funnel in the upper part a perforated tube that communicates with a measuring tank, characterized in that, in order to ... increase the efficiency of the stand while simplifying the design and reducing its overall dimensions, shell and in the middle part it is installed in contact with the jacket and at the contact area there are slotted channels connecting the cavities between the upper and lower sections of the shell and the measuring tank, with the perforated tube inserted into the measuring tank through its top (Line nipple and placed in it is eccentric. with

Description

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FIELD OF THE INVENTION The invention relates to heat engineering, in particular to pd equipment. heat pipe testing.

The purpose of the invention is to increase the profitability of the stand while at the same time simplifying the design and reducing its overall dimensions.

Figure 1 shows the hydraulic layout of the stand; figure 2 - section aa in figure 1 ..

The stand contains a circuit 1 of the coolant circulation, a supply tank 2 installed in it, a drain tank 3 connected to a liquid pump 4, a measuring tank 5 equipped with a thermostatted jacket 6 connected to the auxiliary circulation circuit 7 with a thermostat 8, a measuring tank 5 consists of a measuring chamber 9, 10 nshkne and upper 11 nozzles, forming respectively narrowed channels 2 and 13 of the inlet and outlet. On the pipes 10 and 11 in the sealed chambers 14 and 15 there are photo sensors 16 and 17 opposite the reference marks of the measuring tank 5. To ensure the normal operation of the photo sensors in the sealed chambers 18 and 19, the backlight lamps 20 and 21 are located. With the same purpose, the cameras 14, 15, 18 and 19 are provided with EEAMs 22 and 23 (not shown) of transparent material, for example, of quartz glass.

The consumable tank 2 and the latent tank 5 are separated by a sealed shell 24 containing an upper funnel section 25, smoothly matched with a perforated tube 26, playing the role of a fluid oscillation damper, and inserted eccentrically into the measuring tank 5 (this ensures the normal functioning of the photosensors, since perforated tube does not intersect the optical axis of the photosensors).

The shell 24 is in contact with the thermostatted jacket 6 of the measuring tank 5 and contains in the contact area along the perimeter slotted channels 27, hydraulically connecting the upper 28 and the lower 29 parts of the cavity of the transition chamber 30 between them. The transition chamber 30 is formed by the inner surface of the shell 24 and the outer surface of the measuring tank 5. The slot channels-27 serve for additional heat exchange between the coolant pumped by the pump 4 through 65455

cutting the annular drain chamber 31, which formed the outer surface of the shell 24 and the inner surface of the supply tank 2, and the heat transfer fluid washing the outside surface of the jacket 6 of the measuring tank 5,

The electrical leads from the photo sensor 17, the backlight lamp 21, the hydraulic leads from the jacket 6 to the sealed connectors (not shown) located on the bottom bottom of the supply tank 2, and further to the stand control panel (not shown) are also introduced through the slot channels 27. The presence of contact between the shell 24 and the thermostatted jacket 6 provides additional heat exchange between the coolant pumped through the annular drain chamber 31,

20 and the medium circulating through the thermostatted jacket 6.

The drain tank 3 communicates with the transfer chamber 30 via the overflow pipe 32, and a shut-off valve 33 is installed in the hydraulic line connecting it to the measuring tank 5. The heat pump through the condenser zone 34 of the tested heat pipe 35 is supplied by the liquid pump 4 by means of pipelines and hydraulic control equipment in the form of adjustable throttle 36 communicating with the drain 3 and the consumable 2 tanks. The heat energy is supplied to the evaporator of the heat pipe 35 by means of an electric heater 37. and about the efficiency of the heat pipe and the heat it transfers

The 40 powers are judged by the readings of 38-40 sensors of the tester. Heating or cooling of the coolant is carried out automatically with the help of a thermostatted jacket 6 included in

45 auxiliary circulation circuit 7 with a thermostat 8. Drain the heat carrier from the measuring tank 5 into the drain tank 3 through the shut-off valve 33. The shut-off valve 41 serves

50 for communication of the atmosphere with the air CAVITY - the supply tank 2, the measuring tank 5, the transition chamber 30 and the drain tank 3.

The stand works as follows.

55 The coolant is pumped by pump 4 through the condenser zone 34 of the heat pipe 35, into the annular drain chamber 31, from which it flows over the top edge of the funnel section 25 through the perforated tube 26 into the measuring tank 5 with the shut-off valve 33 closed and the photosensor 16 and 17 blocked. After filling the measuring tank 5, the coolant flows over the upper edge of the nozzle 11, and the stack over the narzgasny surface of the head of the head 6, through the slit channels 27 enters s transition chamber 30, from which through the drain pipe oprovod 32, drain tank 3 again flows into the ICA ik- cavity pump 4. Then the cycle is repeated. When circulating the coolant through a thermostated measuring tank 5, it is heated (cooled) to a predetermined temperature due to heat exchange with the medium flowing through the jacket 6. Intensification of heat exchange, and hence reducing energy consumption, the presence of thermal contact of the shell 25 with the temperature-controlled shirt of the 6th measuring tank 5, additional heat exchange of opposing heat transfer fluids in the zone of slotted channels 27. When the test bench exits the mode for measuring the volume 15 I /

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Yes, 554% of the flow. The heat carrier washing the condenser zone 34 of the heat pipe 35 is commanded to open the shut-off valve 33, at the same time the blocking from the photo sensors 16 and 17 is released. The measuring tank 5 is emptied. When the coolant level reaches in the zone of the nozzle 10, the photo sensor 16 issues with a time delay a command to close the shut-off valve 33, after which the process of filling the measuring tank 5 begins again. Upon reaching the lower control level of the heat carrier tmetki photocell 16 commands the switch-timing device (not shown). After the measuring chamber 9 of the measuring tank 5 is filled and the level of the heat carrier reaches the upper reference mark located in the zone of the nozzle 11, the photosensor 17 outputs a signal to turn off the temporary device. By the time of filling the control volume of the measuring tank 5, enclosed between the lower and upper control marks, the flow rate of the heat carrier is judged.

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FIG. 2

Claims (1)

TEST STAND FOR TESTS> OUTPUT TUBES, containing a supply tank installed in the coolant circuit, inside of which there is a measuring tank with upper and lower nozzles, provided with an outside jacket, connected to the auxiliary circuit of the thermostatic medium, and a shell having a perforated funnel in the upper part a tube communicating with a measuring tank, characterized in that, in order to increase the cost-effectiveness of the stand while simplifying the design and reducing its overall dimensions, the shell in the medium parts of it are installed in contact with the jacket and slotted channels are made in the contact area connecting the cavities between the upper and lower sections of the shell and the measuring tank, and the perforated tube is introduced into the measuring tank through its upper pipe and placed eccentrically in it. SU „„ 1265455