RU1778465C - Heliosorption thermal transformer - Google Patents

Abstract

Use, the invention relates to refrigeration. SUMMARY OF THE INVENTION: to increase the reliability of the helioabsorption thermotransformer by maintaining a constant concentration, it is equipped with a water supply line to the suction port of the absorber circulation pump with a two-way control valve and a solution concentration sensor located in the accumulator and connected to the valve. A constant concentration of the working substance will be maintained in the thermotransformer due to the fact that how much solvent will be removed from the stripper, the same amount will be supplied through the two-way valve to the absorption pump of the absorber of the absorber. The amount of make-up is controlled by the concentration sensor. 1 ill.

Description

The invention relates to refrigeration equipment, in particular to helioabsorption thermotransformers.

A known solar absorption transformer consisting of a generator including a solar heater and an air stripper, an absorber, an evaporator, a regenerative heat exchanger, a solution accumulator, a crystalline hydrate collector, an additional heat exchanger installed in a crystalline hydrate collector, cold and warm water storage tanks and shut-off and control valves fittings with pumps. As working substances, aqueous solutions of lithium chloride and bromide are used.

During the operation of the helioabsorption thermotransformer in the stripper, the solvent of the working substance, water, is constantly removed to the atmosphere. At the same time, the device does not have elements to maintain the stability of the laptop or zone

working concentrations, which ultimately leads to the complete removal of the solvent through the stripper and the impossibility of further operation of the thermal transformer.

The purpose of the invention is to increase reliability by maintaining a constant concentration of the working solution in the thermotransformer.

To achieve this, the helioabsorbing transformer is equipped with a water supply line to the suction port of the absorber circulating pump, containing a two-way control valve with a working solution concentration sensor, the solution concentration sensor being located in the accumulator.

The drawing shows a solar absorption thermotransformer.

The thermotransformer comprises a generator consisting of a solar heater 1 and an air stripper 2 located in one absorber housing 3 and an evaporator 4.

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solution regenerative heat exchanger 5 of irrigation type, accumulator b, 4 sprinkler 7. water cooler 8, collector 9 of crystalline hydrates of salt, heat exchanger 10 installed in the lower part of collector 9 of crystalline hydrates, collecting tanks of cold 11 and warm 12 water connected to heat exchanger 10 at using a control device consisting of a temperature sensor 13, an actuator 14, and three-way valves 15 and 16. The thermo-transformer contains pumps 17 and 18, consumers 19 and 20 of cold and heat, valves 21-24, a non-return valve 25, and regulation Solution 26 in the storage layer.

In addition, the GAT contains a concentration regulator 27, a two-way valve 28 installed on the water supply line 29 to the suction pipe of the absorber circulation pump 17. The concentration regulator 27 is located in the accumulator 6.

Helioabsorption thermotransformer operates as follows.

In the daytime, when the intensity of solar radiation is maximum, the refrigerant vapor generated in the evaporator 4 is absorbed under vacuum in the absorber 2 with an aqueous-salt solution, the concentration of which decreases. The weak solution from the absorber 3 is pumped through the open valve 22 to the heat exchanger 5, where Heated with a strong solution and sent to the solar heater 1 for heating. The hot solution is supplied to the air stripper 2, where it evaporates. The resulting strong solution through the check valve 25 is supplied through the sprinkler 7 to the outer surface of the regenerative heat exchanger 5, where it is cooled with a weak solution. Then, the strong solution on the surface of the water cooler 8 is re-cooled to the temperature at which crystallization begins. Crystals accumulate in a collection of 9 crystals. The liquid saturated solution flows through the holes made in the crystal collector 9 into the lower part of the accumulator 6, from where it is supplied through the level regulator 26 to the absorber 3.

When the crystallization process sets in, heat is absorbed or released. In this case, when the heat is absorbed, the temperature of the crystalline hydrate decreases and the temperature sensor installed in the lower part of the salt crystalline hydrate collector 9 gives a signal to the actuator 14, which, using the three-way valves 15 and 16, connects the heat exchanger 10 to the collector tank 11 of cold water. If heat is generated during the formation of the crystalline hydrate, its temperature rises and the control device connects the heat exchanger 10 to the collection tank 12 of warm water. When crystallization ceases, the temperature in the crystalline hydrate collector becomes equal to the temperature of the solution (for LiCI-HaO and LiBr-H20 solutions, approximately 35–40 ° C), and the sensor 13

0 temperature gives a signal to the actuator 14, which using valves 15 and 16 disconnects the heat exchanger 10 from the collection tanks of cold 11 and warm water 12,

5 When the level of solar radiation decreases, the flow of the solution from the absorber 3 to the solar generator stops (valve 22 is closed), it is sent to the sprinkler 7 (valve 21 is open) of the accumulator 6, where the solution 0 dissolves the salt crystalline hydrate in the collection 9. The solution strengthens and through the level controller 26 is directed to the absorber 3,

Upon dissolution of the crystalline hydrate, heat of dissolution is released or absorbed. The temperature in salt crystallization tank 9 becomes higher or lower than the average temperature of the solution. The temperature sensor 13 provides a signal to

0 actuator 14, which, depending on the temperature, connects the heat exchanger 10 to the collector tank of cold water 11 or warm 12. When all the crystals are dissolved in the crystalline hydrate collector 5, the average solution temperature is set, and the actuator 14 disconnects the heat exchanger 10 from the collector tanks 11 and 12.

When the concentration of strong

In solution 0, pumps 17 and 18 are turned off. The thermal transformer is not working. Heat supply to consumers is carried out from collection tanks 11 and 12 (valves 23 and 24 are open).

5 With the continuous operation of stripper 2, moisture vapor is constantly removed from the latter to the atmosphere. This leads to a constant increase in the concentration of the working solution in all elements of the thermal transformer. At

When the critical concentration of the solution in the accumulator 6 is reached, a signal is sent from the sensor 27 to the two-way control valve 28, which opens and ensures the supply of water to the circulation inlet

5 of the pump 17 along line 29. The circulation circuit of the pump 17 then passes through the valve 21 and sprinkler 7. After reaching the working concentration of the solution in the accumulator 6, according to the signal of the sensor 27, the valve 28 turns off

water in line 29.

Maintaining a constant concentration of the working solution ensures the constancy of the operating characteristics of the helioabsorption thermotransformer, i.e. provides its reliability.

Claims (1)

The claims Helioabsorption thermotransformer containing a generator heated by solar energy, an absorber and an evaporator located in one housing, a heat exchanger-regenerator installed on the lines of strong and weak solutions, a storage part of the strong rastor after the generator, an irrigation device connected to the strong solution line after the generator and placed in top of the drive a water cooler, a collection of salt crystal hydrates, in which a heat exchanger-regenerator of type irrigation type and a water cooler, and tanks of cold and warm water are placed from top to bottom, and in the lower part of the collection of salt crystal aggregates, an additional heat exchanger is installed under the water cooler, connected with a tank by means of a regulating device, characterized in that, in order to increase reliability in operation, the thermotransformer is equipped with a water supply line to the suction pipe of the circulation 5 absorber pump with a two-way control valve installed on it and a solution concentration sensor located in the drive and connected to the valve.