Cooling device of heat exchange type for transformer

FIELD: heating.

SUBSTANCE: cooling device of a heat exchange type for a transformer includes the following: an insulation oil circulating pipe made in the form of a closed circuit so that insulation oil added to the transformer is taken to the outside and then it returns again to the transformer; an insulation oil pump designed for transfer of insulation oil; and an insulation oil cooling system designed for cooling of insulation oil; the insulation oil cooling system includes the following: a liquid cooling agent maintained in a liquid state throughout the circulation cycle; a cooling agent circulating pipe designed for the liquid cooling agent circulation; a cooling agent pump designed for transfer of the liquid cooling agent; and a heat exchange part made so that heat exchange is provided between the liquid cooling agent and insulation oil for insulation oil cooling.

EFFECT: reducing weight and dimensions of the device.

12 cl, 7 dwg

 

The technical field

The present disclosure relates to the device cooling heat exchanger type transformer having a light weight and demonstrate as operational performance cooling low energy and high efficiency.

The level of technology

With the growth capacity of the transformer increases the amount of heat dissipation and increasing the growth temperature, and therefore a problem occurs the transformation efficiency voltage. Therefore, in order to avoid temperature increase due to dzhoulevo heat, the transformer is filled with transformer oil, the current in the winding, and is maintained at a predetermined temperature due to the cooling of transformer oil. Transformer oil, which is an insulating oil obtained by separation into fractions and purified mineral oil, used for insulation and cooling of the transformer.

In the cooling system for a transformer used several cooling schemes, such as dry scheme of self-cooling, dry scheme wind cooling, oil-filled circuit self-cooling, oil-filled circuit wind cooling, oil-filled circuit water cooling, oil-filled circuit air cooling, etc. depending on its capacity.

Of them oil-filled circuit of self-cooling - uh what about the scheme, providing the location of the transformer casing in the shell completely filled with transformer oil, the transfer of heat generated in the iron core and the coil in the shell under the action of convection transformer oil and heat in the air by radiation and convection in the shell, oil-filled circuit wind cooling, which is a scheme for obtaining a cooling effect due to the connection of the fan to the oil-filled transformer is attached to the heat sink for the implementation of the blower, is used in the transformer of large capacity, and oil-filled circuit water cooling is the cooling of the transformer due to the installation of the cooling pipes for the upper insulating oil in the shell of the transformer and the cooling-water circulation system.

Meanwhile, different trains include a transformer for supplying power to the traction motor. The transformer during operation generates a lot of heat. For cooling transformers, you can apply different cooling systems. However, in the case of the traditional scheme of the blower fan, which is mainly used, the blowing fan having a weight of several hundred kilograms, provided for each transformer, which weight becomes too high and that the same requires a lot of space for installation. In addition, the energy required for operation of the blower fan, also affects the overall efficiency.

In addition to the aforementioned cooling systems, in Korean laid patent application No. 10-2005-0108508 disclosed device is forced oil cooling for the transformer that uses a heat-exchange circuit, but does not provide a circulation pump and a heat exchanger suitable for use in conditions with large vibrations. In addition, since the device is forced oil cooling for the transformer disclosed in Korean laid patent application No. 10-2005-0108508, includes a compressor and an evaporator for the cooling cycle, the efficiency is low.

In Korean laid patent application No. 10-2007-0075970 disclosed cooling device for a transformer that uses the refrigeration cycle without compressor. However, the cooling device, disclosed in Korean laid patent application No. 10-2007-0075970 uses refrigerant-based liquefied gas having a boiling point of less than 95C, but includes the evaporator. This causes a limitation in the creation of compact and economical device for cooling and is not possible to design a heat exchanger that can improve performance or cooling to facilitate construction.

The invention

Task this is the future of the disclosure is the provision of a cooling system, heat exchanger-type transformer, which can be manufactured with low weight and small size, economical and highly resistant to noise or vibration and high performance cooling efficiency.

According to an exemplary variant of implementation of the present disclosure, provided by the device cooling heat exchanger type transformer comprising: a circulation pipe for insulating oil, configured in the form of a closed loop so that the insulating oil is filled in the transformer, out and then back into the transformer; a pump for insulating oil, configured to transfer the insulating oil; and a cooling system insulation oil, configured to cool the insulating oil, and cooling system insulation oil, includes: a liquid refrigerant is maintained in the liquid state throughout the cycle of circulation; circulation pipe for the refrigerant, configured for circulation of a coolant fluid; a pump for refrigerant configured to transfer liquid refrigerant; and a heat exchange part, configured to provide heat exchange between the liquid refrigerant and insulating oil for cooling the insulating oil, and the heat exchange part includes: a multilayer the anal part, includes multiple layers, formed so that the insulating oil flows to the multiple layers, the inlet portion located on the upper section of the multilayer channel portion; an exhaust part located at the lower section of the multilayer channel portion; and a shell portion for the refrigerant configured to cover the multilayer channel portion and configured such that the liquid refrigerant flows around the multilayer channel part.

The liquid refrigerant may have a boiling point of 120C or more. The liquid refrigerant may include ethylene glycol (EG).

Multilayer channel portion, the inlet portion, the outlet portion and a shell portion for the refrigerant can be made of stainless steel.

The corresponding channel portion, forming a multi-layer channel portion may be formed by bending a thin metal plate with the formation of rectangular form.

A thin metal plate may have a thickness t of 0.4 to 0.8 mm

The corresponding channel portion may have a rectangular cross-section and having a short width h inside of 1.8 to 2.2 mm long and the width w of the inner side from 80 to 120 mm

Multilayer channel part may include a first multi-layer channel portion and the second multilayer channel part, aznacennie from each other by a predetermined distance horizontally.

The inlet portion may include a guide plate, resetlayout flow channel into multiple parts, so that the insulating oil uniformly served in multi-part.

The device cooling heat exchanger type transformer may further include adjustment plate configured to adjust the set temperature of the cooling heat transfer section so that in summer it was higher than in winter.

The pump for the refrigerant may include a motor part and krylatomu part for transferring refrigerant from a motor part, and the refrigerant can be configured to circulation in the inner area of the motor part.

The circulation pipe insulation oil pump for insulating oil and cooling system insulation oil may include: a first circulation pipe for insulating oil, the first pump for insulating oil-carrying insulating oil in the first circulation pipe for insulating oil, and the first cooling system insulation oil, coolant insulating oil in the first circulation pipe insulation oil, which are located on the same side of the transformer; and a second circulation pipe for insulating oil, a second pump for insulating is about oil, carrying insulating oil in the second circulation pipe for insulating oil during the accident, and the second cooling system insulation oil, coolant insulating oil in the second circulation pipe insulation oil, which are located on the other side of the transformer.

Brief description of drawings

Fig. 1 is a schematic diagram of a cooling system for a transformer to apply the devices 100 and 100' cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure.

Fig. 2 is a view in section of the pump 160 for the refrigerant according to an exemplary variant of implementation of the present disclosure.

Fig. 3 is a side view of the heat transfer section 170 according to an exemplary variant of implementation of the present disclosure.

Fig. 4 is a disassembled perspective view of the heat exchange part 170 according to an exemplary variant of implementation of the present disclosure.

Fig. 5 is a perspective view with partial cut heat transfer section 170 according to an exemplary variant of implementation of the present disclosure.

Fig. 6 is a schematic diagram showing a method of manufacturing a multi-layer channel part 171 according to an exemplary variant of implementation of the present disclosure.

Fig. 7 is a graph showing the results of tests on exploits the traditional indicators cooling device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure.

Detailed description

Further, the device cooling heat exchanger type transformer according to an exemplary variants of implementation of the present disclosure will be described in detail with reference to the accompanying drawings.

In Fig. 1 is a schematic diagram of the cooling system for a transformer to apply the devices 100 and 100' cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure.

As shown in Fig. 1, device 100 and 100' cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure is configured so that the insulating oil is filled in the transformer 101 may dissipate Joul warmth educed generated by the windings of the transformer 101, out in the circulation process. For this purpose one side of the transformer 101 is equipped with a tank 102 for supplying insulating oil, which is cooled in the process of circulation of the different pumps, etc. that will be described below, and then returns to the transformer 101. In this case, the device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure does not include such a component, as a fan or blower having large mass or consuming a lot of energy is GII, and implements a lightweight, compact, economical and highly efficient cooling via a heat exchanger.

As shown in Fig. 1, the device cooling heat exchanger type transformer may be provided with a device 100 of the cooling heat exchanger type transformer and the other device 100' of the cooling heat exchanger type transformer, to ensure the health of the transformer 101 even during a failure or accident. Thus, any device cooling heat exchanger type transformer operates at the usual time, and another device cooling heat exchanger type transformer operates in such a situation, as the situation of service, etc. to the cooling of the transformer 101 did not stop.

The device 100 cooling heat exchanger type transformer can, in General, to include the circulation tube 110 for insulating oil pump 120 for insulating oil, valves 131 and 132 and the system 140 cooling insulation oil.

The circulation tube 110 for insulating oils configured in the form of a closed loop, allowing the insulating oil is filled in the transformer 101 can be printed out and then return back to the transformer 101.

The pump 120 for insulating oil, which is configured on the I transfer insulating oil due to power may include a pump, etc. as a pump 120 for insulating oil can be applied pump capable of operating at low speed according to the operational improvement of the heat exchange part, which will be described below, and you can use a four-pole motor pump with a speed of about 1800 rpm In this case, due to the low speed, it can significantly reduce noise and vibration, it is possible to increase the service life of the bearing and you can save on repair and maintenance due to frequent failures.

The system 140 cooling the insulating oil can be used the liquid refrigerant, which does not need to compress or condense. Thus, the refrigerant used in the cooling device heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure, which is a liquid refrigerant having a high boiling point, is maintained in the liquid state throughout the cycle of circulation. As the liquid refrigerant, which can effectively dissipate heat energy insulating oil while maintaining in the liquid state even at temperatures greater than or equal to the temperature at which can happen thermal denaturing insulating oil, it is possible to use a material having a boiling point of 120C or more. In the us oasam embodiment, as the liquid coolant used ethylene glycol (EG). Ethylene glycol, which is a material having a sufficiently low freezing point for use in non-freezing liquid, but having a high boiling point, effectively implements the cooling effect of the insulating oil without phase transition in the cycle. As a result, the compressor and condenser are not used, increasing the cost and weight for the configuration of the compressor and the condenser, increasing the operating energy, the increase in the situation of service, increase in the area of installation, etc. generally are not created.

The system 140 cooling insulating oil may include liquid refrigerant is maintained in the liquid state throughout the cycle of circulation, as described above, the circulation pipe 150 for the refrigerant, which circulates a liquid refrigerant pump 160 refrigerant configured to transfer the liquid refrigerant, and a heat exchange part 170 for performing heat exchange between the insulating oil and liquid refrigerant for cooling the insulating oil.

In Fig. 2 shows a view in section of the pump 160 for the refrigerant according to an exemplary variant of implementation of the present disclosure. As the pump 160 for the refrigerant according to the present variant implementation, which is a pump with high heat resistance capable of withstanding high is the temperature value, you can use leaky shielded motor pump in which a sealing ring is not damaged even in conditions of high vibration, for example, on the train, etc., Thus, the pump 160 for the refrigerant may include a motor part and krylatomu part, and the coolant is able to circulate in the internal area of a motor part. Now let us describe in more detail the pump 160 for the refrigerant.

The pump 160 for the refrigerant may include components such as a shirt 160-10, the impeller 160-15, front housing 160-12, rear case 160-22, stator node 160-30, the rotor 160-40 Assembly, bearings 160-51 and 160-52, pipes 160-55 and 160-56, auxiliary impeller 160-60, connector 160-70, etc. However, in some cases, some of the above components are not part of the pump 160 refrigerant or can be replaced in another form.

Shirt 160-10, which is a component covering the impeller 160-15, equipped with inlet 111, which is the working fluid, i.e. the liquid refrigerant, and the outlet 112 from which the working fluid is shown under the action of centrifugal force.

The impeller 160-15, which is a component attached to the rotor 160-40 Assembly, receives the driving force developed by the rotor 160-40 Assembly, and forcibly directs the working fluid medium in Robina direction due to rotation, the working fluid can move to the outlet 112 shirts 160-10.

Front housing 160-21 and rear casing 160-22 made in the form in which they are inside, respectively, to provide seats that are installed bearings 160-51 and 160-52. To connect with one another front housing 160-21 and rear housing 160-22 stator node 160-30 with corresponding flanges 160-31 and 160-32. In this case, the front flange 131 may be formed in a shape in which its diameter is greater than that of the rear flange 132 that allows you to directly attach it to the shirt 160-10. Front flange 131 and shirt 160-10 are connected to each other by a bolt 135 washer, inserted from the front side of the flange 131. To achieve high sealing forces and to simplify the Assembly through the construction of a direct connection between the stator node 160-30 and shirt 160-10. Front housing 160-21 attached to the front flange 131 of the stator node 160-30 bolt 125 flange, is inserted from the side of the front housing 160-21.

The rotor 160-40 Assembly includes a shaft 160-41, core 160-42 rotor attached to the shaft 160-41, and the screen 143 rotor, sealing the core 160-42 rotor.

Shaft 160-41 includes a through hole 160-41a formed in the direction of the length at its center, and includes a side opening 160-41b, the connection is Noah with a through hole 160-41a formed in the radial direction. When the motor is running, the working fluid enters through the through hole 160-41a under the action of the impeller 160-15 and then enters into the interior of the motor through a side opening 160-41b.

To the front end and the rear end of the rotor 160-40 Assembly attached nozzles 160-53 and 160-54, respectively, and the nozzles 160-53 and 160-54 supported by respective bearings 160-51 and 160-52. Bearings 160-51 and 160-52 include labyrinth 160-51a formed in the spiral and axial directions, and continuous sliding between the shaft 160-41 and bearings 160-51 and 160-52 is provided a working fluid medium moving through the maze 160-51a. Thus, the lubricating action is performed by the liquid refrigerant, which is the working fluid medium, a portable pump, without using a separate lubricating oil. Therefore, as the sealing ring, etc. is not used during operation of the pump 160 for refrigerant leaks refrigerant due to the destruction of the sealing ring does not occur.

Stator node 160-30 made in the form, where the electrical wire wrapped around an iron core 160-33 and sealed screen 160-34 stator. The area of the front end section of the rear end of the stator node 160-30 provided with flanges 160-31 and 160-32 to attach to the front of the case is 160-21 and rear housing 160-32, accordingly, as described above.

Auxiliary impeller 160-60 provides a channel for the release of the air contained in the inner space in which is mounted the rotor 160-40 Assembly. Thus, the auxiliary impeller 160-60 deflates, allowing the working fluid flows into the internal space due to the rotation of the impeller 160-15 after implementation of the device cooling heat exchanger type transformer, and is closed when the air is completely released.

Connector 160-70, which is a component of connecting an electric wire, etc., stator node 160-30 with the external terminal, removed from the stator node 160-30, with a high temperature, for a predetermined length of the extension tube.

As described above, since the liquid refrigerant enters and circulates in the pump 160 for the refrigerant, made in the form of leaky shielded electric pump for the implementation of the cooling effect and the lubricating action of the motor part of the pump 160 for the refrigerant, without affecting the internal component of the motor part, the o-ring may be damaged, and the service life can be increased.

In Fig. 3 shows a side view of the heat transfer section 170 according to an exemplary variant of implementation of the present disclosure; Fig. 4 shows a disassembled view of the term heat transfer section 170 according to an exemplary variant of implementation of the present disclosure; in Fig. 5 shows a perspective view with partial cut heat transfer section 170 according to an exemplary variant of implementation of the present disclosure, and Fig. 6 is a schematic diagram showing a method of manufacturing a multi-layer channel part 171 according to an exemplary variant of implementation of the present disclosure.

As shown in Fig. 3-6, the heat exchange portion 170 configured to transfer heat insulating oil in the liquid refrigerant in the state in which the insulating oil and the liquid refrigerant can flow independently, made in the form in which it has light weight and long service life.

Heat exchange part 170 includes a multilayer channel portion 171, which includes multiple layers, formed so that the insulating oil can flow into multiple layers, the inlet portion 172 located on the upper section of the multilayer channel part 171, the final part 173, located on the lower section of the multilayer channel portion 171, and a shell portion 174 for refrigerant configured to cover the multilayer channel portion 171 and is configured so that liquid refrigerant can flow around multi-layer channel part 171. Multilayer channel portion 171, the inlet portion 172, the outlet portion 173 and a shell portion 174 for the refrigerant can be made from the tone of the Oh of the metal plate, able to the weight reduction and having corrosion resistance. A specific example of a thin metal plate may include stainless steel.

Multilayer channel portion 171, which is the main component that allows the insulating oil, the current in the several parts, to provide maximum contact area is preferably configured to have a predetermined rigidity and a large surface area, despite the light weight. As shown in Fig. 5, multi-channel portion 171 may include a first multi-layer channel portion 171A and the second multilayer channel portion 171B, located at a distance from each other, and the first and second multilayer channel portion 171A and 171B are channel portion, arranged at a distance from each other. As shown in Fig. 6, multi-channel portion 171 is formed by bending a thin plate 171-1 stainless steel, having a small thickness, with the formation of rectangular form, with subsequent sealing sections, mating with each other by welding.

To provide sufficient surface area for heat transfer and the rigidity of the structure can limit the thickness t, short width h inside, and the long width w of the inner side thin plates 171-1 stainless steel. Thus, the use of thin plate 171-1 stainless steel having a thickness t of 0.4 to 0.8 mm, short width h inside of 1.8 to 2.2 mm long and the width w of the inner side from 80 to 120 mm, the Length L can be adjusted depending on the quantity of insulating oil or the size of the transformer.

Rectangular multi-layer channel portion 171 of small width and thickness has a significantly higher efficiency of heat transfer as compared with the case where the heat exchanger is configured using a circular pipe, etc. and allows continuous flow of the insulating oil flowing through it, and to increase the density of the layout of the device. Therefore, a rectangular multi-layer channel portion may have a low weight and can be manufactured with a small size.

The inlet portion 172 provided with a guide plate 173, razvitsya flow channel into multiple units that can uniformly apply insulating oil in multi-part 171. Guide plate 173 may be configured extending in a predetermined inclined form according to the form in which it extends from the circulation pipe 150 for the refrigerant to the heat exchange part 170.

In Fig. 7 shows a graph showing the test result on the performance of the cooling device cooling heat exchanger type transformer according to the PR, the dimensional variant of implementation of the present disclosure. In Fig. 7 ch1 indicates the outdoor temperature pump for insulating oil, ch2 indicates the internal temperature of the pump for insulating oil, ch3 indicates the temperature in the front area of the heat exchange part, ch4 indicates the temperature of the rear section of the heat exchange part, ch5 indicates the temperature in the tank for insulating oil and ch6 indicates the temperature in the tank of refrigerant.

After configuring the device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure, in the initial state, the temperature ch5 insulating oil equal 90,6C and the temperature ch6 refrigerant equal to 14.6C. After a absolute time after the start of temperature on these sites was measured every thirty seconds. You can make sure that the temperature of the insulating oil is declining rapidly over time.

After heating at a predetermined time (taking into account the generation of heat due to the operation of the transformer) change in temperature according to the heating continuously recorded. You can see that although the temperature of the insulating oil is increased according to the heating, after the time constant temperature, which is below the initial temperature of about 30C, although the temperature of the refrigerant is increased compared nachalnoy temperature, it is equal to about 54C. the Liquid refrigerant, the temperature of which is increased, can be cooled by atmospheric air entering the train, etc. that executes the motion.

As described above, since the device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure may have a high efficiency of heat transfer, solution, due to the presence of the cooling system insulation oil large size, using the blast fan, etc. may cause a leak because the sealing ring is not used in trains, which are always present vibration, and can implement high performance heat transfer, it has high applicability.

In addition, the device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure may include adjustment plate or the controller is configured to adjust the set temperature of the cooling heat exchanger parts, such as cooling temperature of the insulating oil, so that in summer it was higher than in winter. Because the controller can easily adjust the temperature of the cooling required for operation of the transformer according to the t time of the year or the working area of the transformer, you can improve the efficiency and additionally save energy.

As stated above, due to the use of the device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure, since the insulation oil is cooled heat exchange part, fabricated in a multilayer form, and liquid refrigerant is maintained in the liquid state throughout the cycle of circulation, it is possible to reduce the weight compared with the existing cooling system in which cooling has a separate blower fan. In addition, since a compressor, a condenser, a motor for rotating the fan, etc. are not required, you can reduce cost and save energy.

Because the device cooling heat exchanger type transformer according to an exemplary variant of implementation of the present disclosure may maintain a seal even under conditions of vibration or high temperatures due to the use of shielded motor type design, in which the refrigerant circulates in the pump for the refrigerant, it can be widely applied to high speed train or in industrial environments with high vibration.

The above-described cooling device Teploobmennik what type of transformer is applicable not only to the configuration and method of the above-described exemplary embodiments. All or some of the above exemplary embodiments can be selectively combined with each other to provide a variety of modifications.

1. The device cooling heat exchanger type transformer, containing:
the circulation tube for insulating oil, configured in the form of a closed loop so that the insulating oil is filled in the transformer, out and then back into the transformer,
pump for insulating oil, configured to transfer the insulating oil, and
the cooling system insulation oil, configured to cool the insulating oil,
moreover, the cooling system insulation oil, includes:
liquid refrigerant is maintained in the liquid state throughout the cycle of circulation,
a circulation pipe for refrigerant configured to circulate liquid refrigerant,
the pump for the refrigerant configured to transfer the liquid refrigerant, and
heat transfer part configured to provide heat exchange between the liquid refrigerant and insulating oil for cooling the insulating oil,
moreover, the heat exchange part includes:
multilayer channel portion comprising multiple layers formed in such a way that the centrifugal what was the oil flows to the many layers
the inlet portion located on the upper section of the multilayer channel part,
the final part located at the lower section of the multilayer channel part, and
shell portion for the refrigerant configured to cover the multilayer channel portion and configured such that the liquid refrigerant flows around the multilayer channel part.

2. The device under item 1, in which the liquid refrigerant has a boiling point of 120C or more.

3. The device under item 1, in which the liquid refrigerant comprises ethylene glycol (EG).

4. The device under item 1, in which the multilayer channel portion, the inlet portion, the outlet portion and a shell portion for the refrigerant is made of stainless steel.

5. The device under item 1, in which the respective channel portion, forming a multi-layer channel part formed by bending a thin metal plate with the formation of rectangular form.

6. The device under item 5, in which the thin metal plate has a thickness t of 0.4 to 0.8 mm

7. The device under item 5, in which the respective channel parts have a rectangular cross-section and having a short width h inside of 1.8 to 2.2 mm long and the width w of the inner side from 80 to 120 mm

8. The device according to p. 7, in which the multilayer channel portion includes a first multi-layer channel is ing part and the second multilayer channel part, spaced from each other by a predetermined distance horizontally.

9. The device under item 1, in which the inlet portion includes a guide plate, resetlayout flow channel into multiple parts, so that the insulating oil uniformly served in multi-part.

10. The device according to p. 1, additionally containing adjustment plate configured to adjust the set temperature of the cooling heat transfer section so that in summer it was higher than in winter.

11. The device under item 1, in which the pump for the refrigerant includes a motor part and krylatomu part for transferring refrigerant from a motor part, and
the coolant is able to circulate in the internal area of the motor part.

12. The device under item 1, in which the circulation pipe insulation oil pump for insulating oil and cooling system insulation oil include
the first circulation pipe for insulating oil, the first pump for insulating oil-carrying insulating oil in the first circulation pipe for insulating oil, and the first cooling system insulation oil, coolant insulating oil in the first circulation pipe insulation oil, which are located on the same side of the transformer, and


 

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16 cl, 4 dwg

FIELD: heating systems.

SUBSTANCE: automatic gas heater control device relates to control and monitoring systems. It contains the following parts connected to each other: controller, relay switching panel with electromagnetic relays, voltage converter, terminal plate, and LED indicators with built-in resistors. Controller is connected to LED indicators through the terminal plate. Controller, relay switching panel, and voltage converter are connected to terminals for output.

EFFECT: simplifying the design at maintaining the required functional capabilities.

4 cl, 3 dwg, 1 tbl

Heat exchanger // 2334929

FIELD: heating.

SUBSTANCE: invention is referred to thermal engineering and may be used in district heating systems for heating service water. Heat exchanger contains primary circuit channel located between inlet and outlet connections, secondary circuit channel located between supply pipeline assembly and return pipeline assembly, heat-conducting device between primary circuit channel and secondary circuit channel, and temperature sensor. Temperature sensor is located between secondary circuit channels close to connection with return pipeline. Besides, temperature sensor contacts with heat-conducting device or situates at small distance from it.

EFFECT: space saving in heat exchanger when temperature is measured and good results are achieved.

7 cl, 5 dwg

FIELD: systems for automatic control of technological processes for cooling natural gas with use of apparatus for air cooling, possibly in after-compressing stations of gas fields in northernmost regions for sustaining optimal operation modes of air cooling apparatus for natural gas.

SUBSTANCE: system includes frequency-controlled drive unit; unit for processing measurement information and for automatic control; temperature pickups; electronic unit of temperature pickups; computing unit; two actuating devices; blowers. Signals of temperature pickups are fed through electronic unit to unit for processing measurement information and for automatic control. Said unit for processing measurement information judges (on base of inlet signals) what blowers are to be used and sends respective electric signal to computing unit. With the aid of computing unit one actuating device turns on electric motors of blowers due to their alternative connection with frequency-controlled drive and connects with AC-source electric motors of blowers. Other actuating device controls temperature of walls of heat exchange tubes in all sections of air cooling apparatus of gas and connects with frequency-controlled drive electric motor of blower of that section where temperature of walls of heat exchange tubes differs from preset value. After achieving preset temperature value of walls of heat exchange tubes of selected section, apparatus turns off electric motor of blower from frequency-controlled drive and switches it to AC source. Similar operations may be realized for electric motors of blowers if necessary.

EFFECT: simplified system for automatic control of apparatus for air cooling of natural gas.

1 dwg

FIELD: heating systems.

SUBSTANCE: method comprises control of temperature of at least one of secondary flows of fluid in the secondary circuit which outflows from heat exchanger (1) by means of the primary flow in the primary circuit with the use of control members (5) and (11) that control the primary flow under the action of control unit (7), determining the difference of enthalpies of the primary flow that enters heat exchanger (1) and primary flow that leaves heat exchanger (1), measuring the secondary flow, measuring the flow in the primary circuit, and sending the parameters determined to control unit (7) for control of control members (5) and (11). As a result, the primary flow is controlled by the secondary flow so that the power supplied to the heat exchanger with the primary flow is, in fact, equal to the sum of the power required for the heating of the secondary fluid from the initial current temperature up to the specified outlet temperature, power required for the compensation of energy stored in heat exchanger (1), and power losses from heat exchanger (1). The description of the device for control of water temperature is also presented.

EFFECT: enhanced reliability.

13 cl, 9 dwg

FIELD: heating engineering.

SUBSTANCE: space where surface of condensation locates is brought into communication with steam source and with atmosphere. Heat from surface of condensation is removed to group of individual heat consumers in such a way that heat comes to one group of consumers after another group is supplied with it due to the fact that space where surface of condensation locates is separated to a number of cavities relating in series to each other. The cavities form channel, which communicates steam source with atmosphere. Heat from parts of surface of condensation disposed at different cavities is removed separately each from another to different consumers. Device for realization of the method has vapor source connected with inner cavity of heat-exchange apparatus. The inner cavity communicates with atmosphere. Inner surface of heat-exchange apparatus communicates with atmosphere through internal cavity of at least one more heat-exchange apparatus. Heat-exchange apparatuses are connected with heat agent carriers of different consumers of heat. Internal surfaces of heat-exchanges apparatuses form at least one channel elongated in vertical direction.

EFFECT: selective heat supply from surface of condensation.

4 cl, 3 dwg

FIELD: heating systems.

SUBSTANCE: method comprises control of temperature of at least one of secondary flows of fluid in the secondary circuit which outflows from heat exchanger (1) by means of the primary flow in the primary circuit with the use of control members (5) and (11) that control the primary flow under the action of control unit (7), determining the difference of enthalpies of the primary flow that enters heat exchanger (1) and primary flow that leaves heat exchanger (1), measuring the secondary flow, measuring the flow in the primary circuit, and sending the parameters determined to control unit (7) for control of control members (5) and (11). As a result, the primary flow is controlled by the secondary flow so that the power supplied to the heat exchanger with the primary flow is, in fact, equal to the sum of the power required for the heating of the secondary fluid from the initial current temperature up to the specified outlet temperature, power required for the compensation of energy stored in heat exchanger (1), and power losses from heat exchanger (1). The description of the device for control of water temperature is also presented.

EFFECT: enhanced reliability.

13 cl, 9 dwg

FIELD: systems for automatic control of technological processes for cooling natural gas with use of apparatus for air cooling, possibly in after-compressing stations of gas fields in northernmost regions for sustaining optimal operation modes of air cooling apparatus for natural gas.

SUBSTANCE: system includes frequency-controlled drive unit; unit for processing measurement information and for automatic control; temperature pickups; electronic unit of temperature pickups; computing unit; two actuating devices; blowers. Signals of temperature pickups are fed through electronic unit to unit for processing measurement information and for automatic control. Said unit for processing measurement information judges (on base of inlet signals) what blowers are to be used and sends respective electric signal to computing unit. With the aid of computing unit one actuating device turns on electric motors of blowers due to their alternative connection with frequency-controlled drive and connects with AC-source electric motors of blowers. Other actuating device controls temperature of walls of heat exchange tubes in all sections of air cooling apparatus of gas and connects with frequency-controlled drive electric motor of blower of that section where temperature of walls of heat exchange tubes differs from preset value. After achieving preset temperature value of walls of heat exchange tubes of selected section, apparatus turns off electric motor of blower from frequency-controlled drive and switches it to AC source. Similar operations may be realized for electric motors of blowers if necessary.

EFFECT: simplified system for automatic control of apparatus for air cooling of natural gas.

1 dwg

Heat exchanger // 2334929

FIELD: heating.

SUBSTANCE: invention is referred to thermal engineering and may be used in district heating systems for heating service water. Heat exchanger contains primary circuit channel located between inlet and outlet connections, secondary circuit channel located between supply pipeline assembly and return pipeline assembly, heat-conducting device between primary circuit channel and secondary circuit channel, and temperature sensor. Temperature sensor is located between secondary circuit channels close to connection with return pipeline. Besides, temperature sensor contacts with heat-conducting device or situates at small distance from it.

EFFECT: space saving in heat exchanger when temperature is measured and good results are achieved.

7 cl, 5 dwg

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