SU1177651A2 - Bed for testing heat tubes - Google Patents

Abstract

STAND FOR TESTING THERMAL TRUV on av.st. No. 1139956, in contrast to the fact that, in order to improve efficiency while at the same time increasing the accuracy of performance measurement, it additionally contains an auxiliary circulation circuit with a thermostat, and the measuring tank is equipped with a jacket included in this circuit.

Description

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S1 This invention relates to the field of heat transfer devices, namely to installations for testing heat pipes, and is an improvement of the invention according to the author. No. 1139956 The purpose of the invention is to improve efficiency while simultaneously improving the accuracy of performance measurement. Figure 1 shows a diagram of the stand in figure 2 - section aa in figure 1. The stand contains the circuit 1 of the coolant circulation with the supply tank 2 and the measuring tank 3 placed inside it, equipped with a jacket 4, included in the auxiliary circulation circuit 5 with the thermostat 6. P the head 4 forms a ring heat exchanger inside which are placed the transferring elements 7 ( 2). The measuring tank is provided with lower and upper nozzles 8 and 9, respectively, which form the narrowed channels of the inlet and outlet of the coolant. . The consumable tank 2 and the measuring tank 3 are separated by a sealed shell 10, of which in the upper part around the perimeter smoothly mates with a damper of fluid oscillations, made in the form of a perforated funnel 11, lowered into the tube 12 hydraulically connected to the measuring tank 3 through the inlet chamber 13. Photo sensors 14 and 15 are located in sealed chambers 16 and 17 directly on nozzles 8 and 9 opposite the reference marks of measuring tank 3. In order to ensure normal operation of photo sensors 14 and 15, nozzles 8 and 9 are made of transparent material, for example, quartz In the hermetic chambers 16 and 17 opposite the photosensors 14 and 15 are placed the illumination lamps 18 and 19 “Electrical outputs from the photosensors 14 and 15 and the lamps 18 and 19 illumination through hermetic plugs (not shown). removed from chambers 16 and 17 to a stand control panel (not shown). Sylphins 20 and 21 are designed to compensate for possible temperature distortions of chambers 16 and 17. In circuit 1, a drain tank 22 is installed, via an overflow pipe 23 communicating with the cavity of the transition chamber 24 formed by the jacket 4 and the shell 10. The annular drain chamber 25 is formed by the side wall of the the tank 2 and the shell 10. The pumping of the coolant through the condenser zone 26 of the tested heat pipe 27 provides the process pump 28, through pipelines and hydraulic equipment control in the form of The connecting cable 29 is connected with a drain tank 22 and a consumable tank 2. Thermal energy is supplied to the evaporator of the heat pipe 27 using an electric heater 30, and the efficiency of the heat pipe and its heat output are judged by temperature sensors 31-33. Heating or cooling of the coolant is made automatically in the heat exchanger formed by the jacket 4, using a thermostat. The heat carrier is drained from the measuring tank 3. To the tank 22, it is made through shut-off valve 34. The shut-off valve 35 serves to communicate the atmosphere with the air cavities of the supply tank 2, measuring tank 3, trans-one chamber 24 and drain tank 22. The stand works as follows in a way. The coolant is pumped by the pump 28 through the condenser zone 26 of the heat pipe 27, into the annular chamber 25, from where it overflows through the upper edge of the shell 10 into the tube 12 and then through the inlet chamber 13 fills the measuring tank 3 with the shut-off valve 35 closed and blocked photo sensors 14 and 15. Poured through the upper edge of the pipe 9, the coolant enters the transition chamber 24 and through the pipe 23 and the drain tank 22 again enters the suction cavity of the pump 28. Then the cycle is repeated. When the coolant circulates through the measuring tank 3, it is heated (cooled) to a predetermined temperature due to heat exchange with the coolant flowing through the scrubber 4. Intensification of heat exchange and, consequently, a reduction in energy consumption is facilitated by the overflow of the coolant through the upper edge of the measuring tank and further drain into the transitional chamber 24 on the outer surface of the scrub 4, with additional heat exchange with the coolant circulating in the scrub brush. 31 To measure the flow rate of the coolant washing the condenser zone of the heat pipe 27, the command is sent to open the shut-off valve 35, at the same time the blockage is removed from the photosensors 14 and 15. The measuring tank 3 is emptied. When the level of the heat carrier reaches the lower reference mark located in the zone pipe 8, the photo sensor 1A issues with a time delay a command to close the shut-off valve 34, after which the filling of the measuring tank 3 begins. When the level of the heat sink reaches the bottom counter noy mark photosensor 14 delivers the command to the inclusion is a temporary device (not it is shown). After filling the measuring tank 3 and reaching the level of the heat transfer body 14 of the upper control mark located in the zone of the socket 9, the photo sensor 15 gives a signal to turn off the temporary device. According to the time of filling the control volume of the measuring tank 3 concluded between the lower and the upper control marks, the flow rate of the heat carrier is judged. In order to ensure normal operation of the pump 28 during transient conditions, select the volume of the drain tank 22, which should exceed the volume of the measuring tank 3, and conditions for ensuring the emptying of the measuring tank 3 at. maintaining a constant flow rate of coolant in the circuit 1, select the corresponding flow area of the valve 34.

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Claims (1)

STAND FOR TESTING HEAT PIPES by ed. ”1139956, characterized in that, in order to increase efficiency while improving accuracy and measuring performance, it additionally contains an auxiliary circulation circuit with a thermostat, and the measuring tank is equipped with a jacket included in this circuit. (eleven)