Steam ejector cooling plant and method of cold generation therein

FIELD: heating systems.

SUBSTANCE: invention refers to cooling equipment, and namely to cooling plants and heat pumps, and can be used for cooling or heating the rooms and work environment. Steam ejector cooling plant consists of a condenser connected with one liquid pipeline through a throttle valve to evaporator, and with the other liquid pipeline through an intermediate vessel to steam generator. The latter is connected with steam pipeline to operating ejector nozzle, the inlet chamber of which is connected with a steam pipeline to evaporator, and diffuser is connected with a steam pipeline to condenser. Plant also consists of valves located on liquid pipelines connecting an intermediate vessel to condenser and steam generator. Plant is equipped with cyclic heating device of intermediate vessel or its part up to temperature exceeding steam generator temperature, and cyclic cooling device of intermediate vessel up to temperature not exceeding condenser temperature.

EFFECT: improving plant reliability and reducing plant specific consumption of materials.

16 cl, 2 dwg

 

The invention relates to refrigeration, namely to refrigerating units and heat pumps, and can be used for cooling or heating of premises and production environments.

Known ejector refrigeration installation comprising a capacitor associated one liquid pipeline through the throttle valve to the evaporator, and the other liquid pipeline through an intermediate vessel with steam, connected to a steam pipe through the valve to a working ejector nozzle, a suction chamber which is connected a steam pipe from the evaporator, and a diffuser connected to a steam pipe to the condenser, and automatic valves located on liquid pipelines connecting the intermediate vessel with a condenser and steam generator, in which the intermediate vessel whose volume corresponds to the volume of the steam generator, is installed above the steam generator and the associated two pipelines.

A method of producing cold in this ejector refrigeration installation, providing for the liquefaction of the refrigerant vapor in the condenser, throttling the resulting fluid in the throttle valve to a pressure boiling, supply and boil it in the evaporator with obtaining low-temperature vapor due to the heat from the cooled object, the suction and SG who brought them into the ejector to condensing pressure, accumulation, heating and boiling the condensed liquid in the steam generator by supplying heat to it with getting high-temperature proenergetical, in which, after the condenser, the liquid is divided into two flows in the evaporator is sent a stream, and in the steam generator another before the steam generator of the fluid intended to obtain proenergetical, accumulate in the intermediate vessel, and the flow of the liquid in the steam generator, the formation of proenergetical and feeds it into the ejector carried out periodically in three stages, the first of which is at the minimum acceptable level of liquid in the steam generator shut off the supply to him of heat, combined with the intermediate vessel, balance pressure and perepuskat in the steam generator accumulated fluid to the maximum level, the second phase disconnect the generator from the intermediate vessel and ejector and provide heat input and receiving proenergetical to achieve in the steam generator of the specified maximum pressure steam, and in the third stage continue to bring the heat to the steam generator and connect it with a working ejector nozzle, ensuring the flow of steam to the last and sucking them low-temperature steam from the evaporator, and the accumulation of liquid in the intermediate vessel to carry those who'or, while the liquid level in the steam generator will not be reduced to the minimum allowable (patent RU 2053466 "of the Ejector refrigeration installation and method for the production of cold in it." Batuk US, Buz V.N., Konoplev A.I., Smirnov GF 27.01.1996).

These technical solutions according to function and the achieved results are most similar to the claimed by function and the achieved result. They are accepted as the closest analogue (prototype).

The disadvantage of the prototype is the periodic mode of operation, a large number of automatic valves, one of which is installed on a steam pipe connecting the steam generator with ejector. The consequence of this is the complexity of the automation of the installation and the difficulty of achieving air-tightness of the system refrigerant.

The present invention aims at eliminating these disadvantages and solves the technical problem of the continuity of operation of the plant, increasing its reliability and creating opportunities to ensure its full integrity.

To solve this technical problem of the ejector refrigeration installation comprising a capacitor associated one liquid pipeline through the throttle valve to the evaporator, and the other liquid pipeline through an intermediate vessel with steam, is connected to the NYM steam pipeline to the working nozzle of the ejector, receiving chamber which is connected a steam pipe from the evaporator, and a diffuser connected to a steam pipe to the condenser, and also the valves located on liquid pipelines connecting the intermediate vessel with a condenser and steam generator, preventing the flow of fluid from the steam generator into the intermediate vessel and from the intermediate vessel to the evaporator, is provided with periodic heating of the intermediate vessel or part thereof to a temperature higher than the temperature of the steam generator, and periodic cooling of the intermediate vessel to a temperature not exceeding the temperature of the condenser.

Intermediate vessel preferably consists of several spatially separated sections, connected by pipelines; each section is capable of accumulating fluid, with forced heating and cooling may be one of the sections of the intermediate vessel, preferably located first in the direction of travel of the liquid from the condenser to the steam generator.

As a valve preventing the flow of fluid from the steam generator into the intermediate vessel and from the intermediate vessel to the evaporator, applied reverse or automatic valves.

As the device periodic heating of the intermediate vessel preferably applies the n mechanical switch, with the principle trigger two steady state, moving the intermediate vessel or its part in the heated zone of the steam generator and back, while liquid pipelines connecting the vessel or the floating part with other machines made reversibly deformable.

A mechanical switch is preferably in the form of a spring mechanism, independently of the switching from one state to another when you change the mass of the intermediate vessel.

As the device periodic heating of the intermediate vessel or part thereof may be applied to the electric heating device.

As a periodic cooling of the intermediate vessel to a temperature not exceeding the temperature of the condenser is applied ventilation cooling channel or any other cooling device, running on well-known principles.

As a periodic cooling of the intermediate vessel to a temperature not exceeding the temperature of the condenser, can be applied to an automatic valve located on the liquid line connecting the intermediate vessel to the condenser.

The steam generator is preferably provided with a superheater.

The ejector can be made multi-stage power at all levels from pairs of the generator.

To solve this technical problem, the method of production of cold in the ejector refrigeration installation, providing for the liquefaction of the refrigerant vapor in the condenser, throttling the resulting fluid in the throttle valve to a pressure boiling, supply and boil it in the evaporator with obtaining low-temperature vapor due to the heat from the cooled object, the suction and compress them into the ejector to condensing pressure, accumulation, heating the condensed liquid and its boiling in the steam generator by supplying heat to it with getting high-temperature proenergetical, in which the liquid after the condenser is divided into two streams, of which the evaporator is sent a stream, and a steam generator another before the steam generator of the fluid intended to obtain proenergetical, accumulate in the intermediate vessel, is that the flow of liquid from the condenser to the steam generator is carried out periodically in two stages, the first of which is cooled intermediate vessel to a temperature lower than the temperature of the condenser, and fill it with liquid from the condenser under the action arose pressure drop due to the forced opening of the automatic valve or inadvertent opening of the check valve located in the line between the UD and the condenser; and at the second stage heat all or part of the intermediate vessel to a temperature higher than the temperature of the steam generator, and expel fluid from the intermediate vessel to the steam generator under the action arose pressure drop with spontaneous/push the closing back/automatic valve on the line between the vessel and the condenser and spontaneous/push the opening back/automatic valve on the line between the vessel and the steam generator.

As an intermediate vessel preferably used closed containers capable of accumulation of fluid, interconnected pipelines.

The vessel is preferably heated by moving only the intermediate vessel or its part in the heated zone of the steam generator and is cooled by moving only the intermediate vessel or exposed heating part to be cooled in a natural or forced ventilation area, and the pipelines connecting the intermediate vessel to the steam generator and condenser, do reversibly deformable.

The vessel is moved by means of a mechanism having a trigger on the principle of two steady state, transitioning from one to the other by changing the weight of the intermediate vessel, namely, the mechanism places the vessel or its part in heating the needful area by increasing its weight is above a certain threshold and moves the vessel or part of it back from the heated zone while reducing its weight below another certain threshold.

The mechanism preferably is triggered due to a change in mass of the intermediate vessel.

The use of the claimed invention will provide regular return fluid from the condenser to running the generator only by periodic metered cost of thermal energy, i.e. without the use of a mechanical pump with a moving special drive parts. This ensures continuous operation, low power consumption and high integrity.

The use of spring-loaded mechanical switch that is triggered by changes in the mass of the intermediate vessel, will allow for automatic operation of the device solely by the energy of thermal field regardless of other sources of energy.

The invention is illustrated by drawings, where figure 1 shows a diagram of the ejector refrigeration systems with a mechanical switch in the position that provides the cooling of the intermediate vessel, and figure 2 shows a diagram of the ejector refrigeration systems with a mechanical switch in position to heat the intermediate vessel.

The apparatus comprises a boiler 1 steam generator, the evaporator 2 of the steam generator and superheater 3, located in the heater 4, the ejector 5, the receptacle 6 of the refrigerator, the evaporator 7 of the refrigerator, the arrangement is cooled by the device 8, the capacitor 9, the intermediate vessels 10 and 11, the mechanical switch 12 flexible pipes 13, the check valves 14 and 15, the throttle valve 16.

The installation is carried out as follows. The fluid in the boiler 1 steam generator is supplied to the evaporator 2 of the steam generator where the heat of the heater 4 boils. The resulting vapor-liquid mixture is returned to the boiler 1, which is separated into liquid and vapor. Steam from the boiler 1 through the superheater 3 is fed into the working nozzle of the ejector 5. In the superheater 3 under the action of heat coming from the heater 4, the steam is heated and expands, causing a volumetric flow rate of the steam entering the ejector 5. Coming out of the diffuser of the ejector steam enters the condenser 9, which is cooled and condensed by heat transfer to the environment or by the transfer of heat washing the condenser to the coolant.

Part of the condensed liquid from the condenser 9 under the action of pressure difference across the throttle valve 16 is supplied to the evaporator 7 of the fridge, which boils and is cooled by removing heat from the cooling device 8. From the evaporator 7 of the liquid-vapor mixture enters the vessel 6 of the fridge, which is separated into vapor and liquid. The liquid from the vessel 6 is returned to the evaporator 7, and the steam from aceveda the receiving container ejector 5, which is compressed by the steam flow from the steam generator to the condensing pressure and served with him in the condenser 9. The ejector 5 provides a low pressure required for operation of the evaporator 7 of the refrigerator.

The rest of the fluid from the condenser 9 under the action of pressure difference, due to the lower temperature of the vapor in the intermediate vessels 10 and 11, flows through the check valve 14 into the vessel 11, in the position shown in figure 1, and in the vessel 10, gradually filling. Low temperature intermediate vessels 10 and 11 is provided with their natural cooling by heat transfer to the environment. The check valve 15 prevents the flow of hot liquid from the boiler 1 steam generator in the intermediate vessel 10.

When filling the vessel 10 liquid weight increases until, while under the effect of the increased mass of the intermediate vessel 10 will not work spring mechanical switch 12 that moves the intermediate vessel 11 to the heater 4, as shown in figure 2. Under the action coming from the heater 4 heat the liquid in the vessel 11 to boil, increasing the pressure in the intermediate vessel 11 and 10 until, until you get to the check valve 15, through which the fluid will be displaced from the intermediate vessel 10 in the boiler of the steam generator 1. The check valve 14 will be closed. W is dcast from the intermediate vessel 10 will be displaced until while under the effect of the reduced mass of the vessel will not trigger spring switch 12 that moves the intermediate vessel 11 from the heater 4 to the position shown in figure 1.

The flow of heat in the intermediate vessel 11 will cease, resulting starts cooling of the vessels 10 and 11 and the decrease in pressure. Initially automatically closes the check valve 15, and then, after cooling the vessels 10 and 11 to a temperature lower than the temperature of the condenser, opens the check valve 14 and the process of filling the intermediate vessels 10 and 11 will begin again. The cooling process of the intermediate vessels 10 and 11 can be accelerated if, instead of the check valve 14 to apply an automatic valve. When forced opening of this valve high vapor pressure of the intermediate vessels 10 and 11 will begin to flow backward into the condenser, which will cool and condense. By reducing the vapour pressure in the intermediate vessel 10 and 11 are in their hot liquid boils and intensively cooled. After equalization of pressures between the condenser 9 and intermediate vessels 10 and 11, the process flow of liquid from the condenser into the intermediate vessel is resumed due to the ongoing reduction of the temperature of the intermediate vessels.

1. The ejector refrigeration installation, moderadamente, associated one liquid pipeline through the throttle valve to the evaporator, and the other liquid pipeline through an intermediate vessel with steam, connected to a steam pipe to a working ejector nozzle, a suction chamber which is connected a steam pipe from the evaporator, and a diffuser connected to a steam pipe to the condenser, and also the valves located on liquid pipelines connecting the intermediate vessel with the condenser and the steam generator, wherein the plant is equipped with the device of the periodic heating of the intermediate vessel or part thereof to a temperature higher than the temperature of the steam generator, and periodic cooling of the intermediate vessel to a temperature not exceeding the temperature of the condenser.

2. The ejector refrigeration installation according to claim 1, characterized in that the intermediate vessel consists of several spatially separated sections, connected by a pipeline.

3. The ejector refrigeration installation according to claim 2, characterized in that the device is periodic heating of the intermediate vessel to a temperature higher than the temperature of the steam generator, configured to heat the first movement of the liquid from the condenser to the steam generator intermediate section of the vessel.

4. The ejector Ho is Adelina installation according to claim 1, characterized in that as the valves located on liquid pipelines connecting the intermediate vessel with a condenser and steam generator, automatic, or check valve preventing the flow of fluid from the steam generator into the intermediate vessel and from the intermediate vessel to the evaporator.

5. The ejector refrigeration installation according to claim 1, characterized in that as the device of the periodic heating of the intermediate vessel or part of the applied electric heating device.

6. The ejector refrigeration installation according to claim 1, characterized in that as the device of the periodic heating of the intermediate vessel or part of the applied mechanical switch having on the principle trigger two steady state, moving the intermediate vessel or its part in the heated zone of the steam generator and back, while liquid pipelines connecting the vessel or the floating part with other machines made reversibly-deformable.

7. The ejector refrigeration installation according to claim 6, characterized in that the mechanical switch is made in the form of a spring mechanism, switching from one state to another when you change the mass of the intermediate vessel.

8. The ejector refrigeration installation according to claim 1, characterized in that the DL is a periodic cooling of the intermediate vessel to a temperature not exceeding the temperature of the condenser is applied, the air channel.

9. The ejector refrigeration installation according to claim 1, characterized in that for periodic cooling of the intermediate vessel to a temperature not exceeding the temperature of the condenser, the automatic valve, located on the liquid line connecting the intermediate vessel to the condenser.

10. The ejector refrigeration installation according to claim 1, characterized in that the steam generator is equipped with a superheater.

11. The ejector refrigeration installation according to claim 1, characterized in that the ejector is made of multi-stage power at all levels from the steam generator.

12. Method for the production of cold in the ejector refrigeration installation, providing for the liquefaction of the refrigerant vapor in the condenser, throttling the resulting fluid in the throttle valve to a pressure boiling, supply and boil it in the evaporator with obtaining low-temperature vapor due to the heat from the cooled object, the suction and compress them into the ejector to condensing pressure, accumulation, heating the condensed liquid and its boiling in the steam generator by supplying heat to it with getting high-temperature proenergetical, in which the liquid after the condenser is divided into two streams, of which the evaporator healthy lifestyles who have one thread, and in the steam generator another before the steam generator of the fluid intended to obtain proenergetical, accumulate in the intermediate vessel, wherein the flow of liquid from the condenser to the steam generator is carried out periodically in two stages, the first of which is cooled intermediate vessel to a temperature lower than the temperature of the condenser, and fill it with liquid from the condenser under the action arose pressure drop due to the forced opening of the automatic valve or inadvertent opening of the check valve, located on the line between the vessel and the condenser; and the second stage heat all or part of the intermediate vessel to a temperature higher than the temperature of the steam generator and displace the fluid from the intermediate vessel to the steam generator under the action arose pressure drop with spontaneous/push the closing back/automatic valve on the line between the vessel and the condenser and spontaneous/push the opening back/automatic valve on the line between the vessel and the steam generator.

13. The method according to item 12, characterized in that an intermediate vessel used closed containers capable of accumulation of fluid, interconnected pipelines.

14. The way is about 12, characterized in that the vessel is heated by moving only the intermediate vessel or its part in the heated zone of the steam generator and is cooled by moving only the intermediate vessel or exposed heating part to be cooled in a natural or forced ventilation area, and the pipelines connecting the intermediate vessel to the steam generator and condenser, do reversibly-deformable.

15. The method according to 14, characterized in that the vessel is moved by means of a mechanism having a trigger on the principle of two steady state, transitioning from one to the other by changing the weight of the intermediate vessel, namely, the mechanism places the vessel or part thereof in a heated zone while increasing its weight is above a certain threshold and moves the vessel or part of it back from the heated zone, while reducing its weight below the other, also a certain threshold.

16. The method according to item 15, wherein the mechanism is triggered due to a change in mass of the intermediate vessel.



 

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1 dwg

FIELD: heat power engineering.

SUBSTANCE: device comprises pump, circulation circuit provided with two compressors in the top stage. Each of the compressors is connected with the condenser, throttle valve, and evaporator connected in series. The device is additionally provided with separating tank connected to the circulation circuit between two compressors in the top stage that separates the circulation circuit into two circuit, two steam-jet ejectors in the bottom stage interposed between the condenser, and compressor. The separating tank is additionally connected with the circulation circuit in the section between the nozzles of the steam-jet ejectors. The device has two regenerative heat exchangers each of which is interposed between the condenser and throttle valve. The evaporator is connected with the pump, to the top section of the separating tank, to the inlet of each steam-jet ejector, and to the outlet of each throttle valve.

EFFECT: enhanced efficiency.

1 cl, 2 dwg

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