Regenerative cooler

 

(57) Abstract:

The invention is intended for use in refrigeration systems where the refrigerant is air, and the cooled medium is oil. Regenerative cooler contains at least one section comprising heat exchange surface and adjacent to the opposite sides of the distributing and collecting manifolds for one of the environments. Each collector has accordingly working connections for input or output medium (oil). What's new is that each collector further comprises a circulation pipe, and the entire cooler is equipped with at least one bypass line with a regulating gate valve body connected at one end to the distributing manifold of one of the sections, and the other end into a collecting manifold is also one of the sections; in single-cooler - in the same section, the nozzles indicated by connection lines, forming together with collectors and bypass lines are part of a closed loop pre-medium circulation with external heat source. The technical result achieved by the invention is to improve the operational reliability due to the. 8 C.p. f-crystals, 10 ill.

The invention relates to refrigeration, and more particularly to regenerative coolers, and in the particular case of the coolers used in such systems in which the refrigerant is air, and the cooled medium is oil.

Particularly relevant to this invention for oil coolers operating in zones of temperate and cold climate.

Known regenerative coolers containing several sections, each of which has a heat exchange surface and adjacent to the opposite sides of the distributing and collecting manifolds for one of the environments, respectively, operating connections for input and output environment (Technical description and instructions for installation, operation, and care for a group of coolers winter version type 06-10, Budapest, Institute of energy, 1979, S. 4-9 and drawing 3421-Lk-1).

This cooler all the dealer (and collecting) collectors combined total of the dealer's (collecting) the pipeline, and the heat exchange surface is made tubular, while inside collectors entered the electric heating elements.

To launch such a cooler at low ambient temperatures nonconvective heat exchange between the oil heated immersed electric heating elements, and the housing of the collector, heating the heat transfer surface by convective heat transfer between the outer surface of the sections and hot air supplied Autonomous fans through stand-alone heaters. This large heat loss to the environment due to leakage of coolant and lack of insulation. Therefore, improving the reliability, while reducing power consumption when running cooler at low ambient temperatures may not be reached.

Also known regenerative coolers containing at least one section comprising heat exchange surface and adjacent to the opposite sides of the distributing and collecting manifolds for one of the environments, respectively, operating connections for input and output environment (Gas industry, No. 1, 1985, S. 22-23).

However, this cooler has no money, providing in terms of start-up at low ambient temperatures guaranteed heating of the heat exchange sections, which in practice leads to thermal shock, significantly increased the tuplenie in the cold section; in the result, there are cases of depressurization sections and their failure. Therefore, the technical result achieved by the invention, enhanced operational reliability while reducing power consumption when running cooler at low ambient temperatures is not achieved.

The number of General characteristics of the object closest to the invention and is taken as a prototype.

The objective of the invention is the design of regenerative cooler, providing reliable operation with high resource if it needs multiple runs in low temperature environment.

The main technical result achieved by the invention, enhanced operational reliability while reducing power consumption when multiple runs at low ambient temperatures.

Additional technical result achieved by the invention, is to intensify the heating process.

The main technical result is achieved by the regenerative cooler containing at least one section comprising heat exchange surface and adjacent thereto with protiviti for input and output environment each collector section further comprises a circulation pipe, and the entire cooler is equipped with at least one bypass line with a regulating gate valve body connected at one end to the distributing manifold of one of the sections, and the other end into a collecting manifold is also one of the sections.

In the particular case of this technical result is achieved by the fact that one of the bypass lines with one end connected to the circulation pipe collecting collector and the other end of the circulation pipe distributing manifold; one of the bypass lines with one end connected to the circulation pipe distributing manifold, and the other end into a working outlet collecting collector; one of the bypass lines with one end connected to the circulation pipe collecting collector, and the other end into a working outlet distributing manifold; however, these nozzles are communicated through the connecting pipelines, forming together with collectors and bypass lines are part of a closed loop pre-circulation environment, having an external heat source.

Additional technical result is achieved in that the surface of the exchanger the bathrooms sheets; the packages are equipped with a flat electric heaters, while between adjacent packages section provides a gap, and the heaters are installed on the external side walls of the packages in the specified clearances.

This results in particular cases is achieved by the fact that at least one of the collectors surface provided with an electric heater, the profiled shape of the manifold and mounted on its outer surface; a surface electric heaters made in the form of conductive element consisting of non-metal heating layer encased in a polymer shell.

In Fig.1 shows a diagram of a closed loop operational and pre-oil circulation with the described regenerative cooler.

In Fig. 2 is a schematic representation of the three cooler with one bypass line, illustrating PP 2 and 3 claims.

In Fig. 3 - the same cooler, also illustrating PP 2 and 3 claims.

In Fig.4 schematically shows a two-piece cooler with two bypass lines.

In Fig.5 is a schematic representation of a four-section cooler with four bypass lines.

In Fig. 7 presents a perspective view of plate-fin package section of the cooler.

In Fig.8 shows a perspective view of the manifold cooler with profiled shape of the collector surface heater.

In Fig.9 - cross section a-a of Fig.8.

In Fig.10 - cross section a-A of Fig.6.

The design of the regenerative cooler.

Regenerative cooler contains at least one section 1 (see Fig. 1). The cooler may contain several sections, in particular, additional sections 2, 3 and 4 (see Fig. 2, 3, 4, 5). Each section has a heat exchange surface 5, the dealer 6 and collecting 7 collectors. In turn distributing manifold 6 has a working pipe 8 to enter the environment and the circulation pipe 9, the collecting header 7, respectively, a working pipe 10 and the circulation 11. The cooler has at least one bypass line 12 with the regulatory locking body 13. The cooler may also have multiple bypass lines, in particular, 14, 15 and 16 (see Fig. 2, 3, 4, 5). The bypass line 12 is connected to a distributing manifold 6 one of the sections and at the other end to a collecting manifold 7 is also one is because as the temperature controllers of various designs, automatically changing the flow of oil through the bypass line from zero to a maximum value depending on the oil temperature.

The described regenerative cooler (see Fig.1) included in the cooling system oil (or other liquid medium, prone to solidification or freezing) to the desired working temperature using air pumped by the fan (not shown). This system includes a pump 17 and 18 heat source can be a gas turbine engine bearings, blower, compressor, etc). The pump 17 and line 19 (through 18) is connected with a working pipe 8 to the inlet of the oil distributing manifold 6 and highway 20 with a working pipe 10 collecting collector 7 for oil yield.

When performing multiple chiller it will be included in the same circulating system oil cooler. The difference will be only in specific cases, which will be connected to the line 19 and 20.

This system has a closed loop pre-circulation environment, including the highway 19 and 20, the source 18 of the heat pump 17, collectors 6, 7 and the bypass line 12.

The system also has a closed circuit of the working medium circulation, vkljuchajuwih is 7.

Similar circuits will be and when multiple bypass lines. In multiple chillers (see Fig. 2, 3, 4 and 5) at one end adjacent collectors (or the dealer 6 or collecting 7) facing one another, is working pipe (or 8 - to enter the environment, or 10 - to exit the environment), and at the other end adjacent the collector circuit 9 or 11. Work and the circulation pipe is connected via a connecting pipeline 21. The pipelines 21 together with the collectors 6 and 7, and the bypass lines 12, 14, 15 and 16 form part of a closed loop pre-medium circulation with external source 18 and heat pump 17. These pipes 21 with these same collectors 6 and 7 together with a heat exchange surface 5 sections 1, 2, 3, 4 are part of the closed path of the working medium circulation with the source 18 and heat pump 17.

Fig. 1 and 2 illustrate the options when the circulation pipes connected to the bypass line, belong to the same partition. In Fig. 3 illustrates a variant, when the circulation pipe 9 distributing manifold 6 section 3 is connected to the circulation pipe 11 collecting collector 7 section 1. Possible variant of the cooler with two bypass and work the pipe 8 distributing manifold 6, section 1, and the bypass line 14 - the circulation pipe 9 distributing manifold 6 and the working nozzle 10 collecting collector 7 section 2. It is also possible four-section cooler with four bypass lines 12, 14, 15 and 16 (see Fig.5), where the sections are divided into two parallel groups, each of which consists of two sections.

Thus, distributing and collecting manifolds, to a circulation pipe which is connected a by-pass line, are the last dealer collector in the course of the environment in a closed loop pre-circulation and consolidating the collector of this same section (see Fig.2), or collecting manifold section having a first distributing manifold downstream environment in a closed loop pre-circulation (see Fig.3).

Sections 1, 2, 3 and 4 may consist of one plate-fin package 22, and from several packages (see Fig.6). Packages 22 are provided with surface electric heaters 23, while the heaters are installed on the outer side walls 26 of the package 22, and the gap 27 is provided between packages sections. Such heaters 33, but the profiled shape of the collector can be mounted on the reservoir 6, 7.

The surface is symbolic of a heating layer 24, enclosed in a polymer shell 25.

As was shown above, the heat exchange surface 5, mostly made in the form of a plate-fin packet (see Fig.7) alternating flat 28 and arms 29 of the sheets forming the channels 30 (oil channels for the cooling medium and the channels 31 (air channels) for the cooling medium (air).

In this case, the regenerative cooler is made, as a rule, perekrestnotochny, and the feeder side of the second medium (usually air) collectors has not.

Possible embodiments of the regenerative cooler tube or other known type. The material of the cooler, there should be a metal with high conductivity, such as aluminum, its alloys, etc.

Collectors regenerative cooler can be either collecting or distributing; in the first case, each collector has an operating pipe 10 to exit environment in the second case - working pipe 8 to enter the environment.

Collecting header 7, comprising a housing 32 with a working pipe 10 to exit environment has advanced the circulation pipe 11 connected to the bypass line or connecting piping. the>The collector 7 is equipped with a heater 33, made in the form of electrically conductive element, the profiled shape of the manifold and mounted on its outer surface (if such a heater to straighten, it will be similar to the surface of the heater 23). Conductive element (see Fig.9 and 10) has an insulation layer 34 and the power supply 35 (see Fig.6) and is made in the form of a non-metal heating layer 24, for example, graphite encased in a polymer shell 25.

Distributing manifold 6 has the same device that collects the collector 7, and installed on the opposite side of the heat exchange surface 5 (see Fig.6).

Housing 32 collectors 6, 7 is made of a material with high thermal conductivity, for example, from aluminum.

On the roads leading to the collectors can also be installed similar to the heater 33.

The work of the regenerative cooler

Oil is heated in bearings (source 18 heat) until t=60-120oC, using a pump 17 through line 19 enters the distributing manifold 6, and then on the heat exchange surface 5 where it is cooled to a predetermined temperature, and then collecting header 7, from line 20, the cooled oil is to be by fans, adjusting capacity to achieve the desired cooling. Depending on the amount of oil and other production and thermal conditions of the regenerative cooler can be performed multiple. In this case (see Fig.2, 3, 4, 5) the nature of the work, will not change, and the hot oil is pumped through all the heat exchange surface of all sections (serial or parallel), and cool air flow.

In the run mode regenerative cooler works as follows.

The run mode begins when the gas turbine engine or the compressor when the oil temperature is equal to 10-15oC, and the temperature of the regenerative cooler (its collectors, heat transfer surfaces), which is outdoors, can reach minus 60oC.

In this mode, the described method provides for the operation of pre-oil circulation through all distributing and collecting manifolds all sections (see Fig. 2, 3, 4, 5) to bypass the heat exchange surface or through collecting and distributing manifolds one section (see Fig.1) in single run cooler, thus after completion of the preliminary circ cooler. This operation is performed using the bypass lines with regulating the locking body 13: when running cooler one-section through the bypass line 12 (see Fig.1), when performing multiple chiller using bypass lines 12, 14, 15, 16 (see Fig. 2, 3, 4, 5).

Start mode start with the supply of heat to the outer surfaces of the sections of the cooler by conductive heating.

Conductive heating in private cases, beginning with either heat directly to collectors, or to the heat exchange surface sections, or to both. At very low ambient temperatures are more conductive heating by heat to the pipes leading to the reservoir sections of the cooler.

In other words, the start mode start with on of those or other heaters, while the circulation loop is not enabled (motor or blower does not work). Heating of the surface sections of the cooler due to their implementation of materials with high thermal conductivity is intense, and soon after you will be satisfied with the condition tP.F.=tm20oC, where tP.F.- surface temperature sections cooler in degrees Celsius; tmoC.

Then move to the pre-oil circulation, which begin simultaneously with the starting of the engine or supercharger and off of the heaters 23 and 33. In practice, this operation is carried out as follows. Regulatory body 13 on all bypass lines 12, 14, 15, 16 set in the "open" position, open the valve (not shown) on lines 19, 20, and the oil pumped by the pump 17 through line 19 and the source 18 of the heat supplied to the working pipe 8 distributing manifold 6, section 1 (see Fig. 1) and then, bypassing the heat exchange surface 5 (due to its large hydraulic resistance at low temperatures oil) is supplied through the circulation pipe 9 and the bypass line 12 in the circulation pipe 11 collecting collector 7 and through the working tube 10 of the same collector and highway 20 is returned to the pump 17.

In multiple coolers oil in the contour of the initial circulation flows bypassing the heat exchange surface 5 or sequentially through all of the distributing reservoir 6, the bypass line 12 and then through all the collecting reservoir 7 (see Fig.2 and 3), or enters at the same time in the dealer's 6 and collecting 7 koga on the contour of the initial circulation, includes a source 18 of heat, gradually heated, gradually heating the section of the cooler. With increasing oil temperature shut-off body 13 is gradually closed, directing all most of the oil from the distributing reservoir 6 on the heat exchange surface 5. After the oil temperature is equal to about her work is regulating a stop valve 13 is closed completely and all the oil from the distributing reservoir 6 is directed to the heat exchange surface 5 sections of the cooler, thereby terminated prior circulation of the oil, and begins working mode.

This provides the option that the preliminary circulation complete step - initially for one group of sections, then to the other (see Fig.5). This technique is carried out, for example, by setting the regulating valve bodies in sections 1, 2 at a temperature of 50+10oC, and in sections 3, 4 at a temperature of 60+10oC.

The work of collectors is carried out as follows. The work of the collector described in the private version of its application in regenerative cooler with plate-fin surface when cooled medium is oil, and coolant - to-air, drinking collecting, it describes the work of both collectors together (see Fig. 1, 8 and 9).

In the mode of use of the collector at the start regenerative cooler at low ambient temperatures enables the heater 33. Since the housing 32 of the manifold is made from a material with high heat conductivity, is their fast heating. When the enclosure temperature value close to the temperature of the oil, the latter when the pump 17 is supplied to the nozzle 8 distributing manifold, with a stop valve bypass line 13 is in the open position, and the heater 33 is turned off. Received in the socket 8 oil rushes to the circulation pipe 9, bypassing the heat exchange surface (since the latter has a high hydraulic resistance), then passes through the bypass line 12 and through the circulation pipe 11 enters the collecting header 7, where work through the pipe 10 to the consumer. Thus the oil will circulate along the reservoir, increasing the efficiency of heating and of course heating section to a predetermined temperature, after which the locking body 13 is gradually closed, and the collectors are switching to the operating mode.

In the operating mode recuperative environment (submitted to the reservoir is oil, and a cooling medium air, while the bypass line is connected to the circulation path of cooling of the bearings of the gas turbine engine or supercharger.

In the operating mode (control stop valve 13 bypass lines 12, 14, 15 and 16 is closed) oil pumped from the oil tank (Fig.1 not shown) by pump 17 through line 19 is supplied to the source 18 of heat, which are the bearings of the gas turbine engine or compressor. Lubricated and cooled bearings and having absorbed the heat of friction, the heated oil is directed into the working conduit 8 to enter the environment distributing manifold 6 section 1 single-regenerative cooler (see Fig. 1). From the distributing manifold 6 heated oil enters the heat exchange surface 5 in the oil channel 30 where it is cooled while passing through the air channels 31 of the cooling air pumped by the fan (not shown). The cooled oil flows into the collecting header 7 and through the working tube 10 to exit environment and highway 20 (across the tank) is returned to the suction connection of the pump 17.

Possible options scheme when the source 18 of heat is located on highway 20 to the suction line of the pump 17; in this operating mode, the cooling gap is pepsee in distributing manifold 6, section 1, divided into two parts: one part is equal to approximately 1/3 of the total oil consumption, enters the heat exchange surface 5 of the section 1, and the second part, equal to about 2/3 of the oil flow through the circulation pipe 9 and the connecting pipe 21 enters the working pipe 8 distributing manifold 6, section 2, which, in its turn, is divided into two parts. Each of these parts is equal to about 1/3 of the oil consumption; thus one part enters the heat exchange surface 5 of the section 2 and the second through the circulation pipe 9 distributing manifold 6 of the section 2 and the connecting pipe 21 into the working tube 8 distributing manifold 6, section 3.

Oil, chilled in section 3, through collecting header 7 of this section, work the pipe 10 to exit environment, the connecting pipe 21 and the circulation pipe 11 enters the collecting header 7 section 2 where it is mixed with butter, chilled in section 2, and then work through the pipe 10 to exit environment, the connecting pipe 21 and the circulation pipe 11 to the oil collecting reservoir 7 section 1, where it connects with butter, chilled in section 1, and the full flow of the cooled oil through the working tube 10 distributing manifold 7 Shem and multiple coolers, schematic of which is shown in Fig. 3, 4 and 5. The total will be serial or parallel passage of oil through the heat transfer surfaces of all sections, bypassing the bypass line.

In the operating mode of the heated oil (mainly from the circulation circuit having a source of heat) is supplied into the housing 32 of the distributing manifold, and then into the channels 30 of the heat exchange surface, where it is cooled by an air stream passing through the channels 31. The cooled oil flows into the housing 32 collecting collector, and then to the consumer. In the particular case of the consumer is the source of heat (for example, the bearings of steam or gas turbine).

In this mode, the heater 33 is turned off, regulating and stop valve 13 is closed and the oil in the bypass line 12 through the circulation pipe 9 is not supplied.

The invention can find wide applications in climatic zones with moderate and cold climate where the cold time of the year, possibly the gelling and even freezing of oil in the period when the regenerative cooler does not work.

Currently, a pilot batch of regenerative coolers constructed according to this invention by testing, which confirmed the high efficiency of cooling oil, as well as efficient and convenient run cooler in the cold season. Trouble-free working life of such coolers are supposed to be equal to 100 thousand hours, but in reality may be somewhat smaller because of the fan and temperature controls, warranty period which may be less than 100 thousand hours compared to coolers-analogues of electric power consumed at the preliminary warming up before you start in the cold season, decreased 10-12 times.

Currently mastered serial production of such coolers.

1. Regenerative cooler containing at least one section comprising heat exchange surface and adjacent to the opposite sides of the distributing and collecting manifolds for one of the environments, respectively, operating connections for input and output medium, wherein each collector section further comprises a circulation pipe, and the entire cooler is equipped with at least one bypass line with a regulating gate valve body connected at one end to the distributing manifold section, and characterized in that what at one end adjacent collectors, facing one another, is a work-pipe, and at the other end adjacent collector - circulation, while these nozzles are communicated through the connecting pipelines, forming together with collectors and bypass lines are part of a closed loop pre-medium circulation with external heat source.

3. Regenerative cooler under item 1, characterized in that the bypass line has one end connected to the circulation collecting collector and the other to a circulation pipe distributing manifold.

4. Regenerative cooler under item 1, characterized in that one of the bypass lines with one end connected to the circulation pipe distributing manifold and the other to the working pipe collecting collector.

5. Regenerative cooler under item 1, characterized in that one of the bypass lines with one end connected to the circulation pipe collecting collector and the other to the working pipe distributing manifold.

6. Regenerative cooler under item 1, characterized in that the heat exchange surface is made in the form of at least one plate-REB is, trichosis the fact that the packages are equipped with surface electric heaters, with between adjacent packets is provided a gap, and the heaters are installed on the external side walls of the packages in the specified clearances.

8. Regenerative cooler under item 1, characterized in that at least one collector surface provided with an electric heater, the profiled shape of the manifold and mounted on its outer surface.

9. Regenerative cooler under item 1, characterized in that the surface electric heaters made in the form of conductive element consisting of non-metal heating layer encased in a polymer shell.

 

Same patents:

The invention relates to a power system and can be used in steam generators

The heat exchanger // 2097670
The invention relates to heat engineering and can be used in alumina production for heating and cooling slurries and solutions

The heat exchanger // 2089808
The invention relates to heat engineering, namely the heat-exchange equipment

The heat exchanger // 2069831
The invention relates to the field of engineering, in particular to a power system, and can be used in the food industry for thermal processing of liquid foods such as milk pasteurization

The heat exchanger // 2059183

The heat exchanger // 2056033
The invention relates to energy and can be used when designing heat transfer equipment of nuclear power plants

The heat exchanger // 2047074

The heat exchanger // 2142107
The invention relates to heat-exchange technique, namely, heat exchangers

The heat exchanger // 2141614

The heat exchanger // 2141613
The invention relates to heat engineering, primarily for vehicles, namely, devices, providing comfortable conditions in the cabin of a vehicle, and air conditioning equipment

The heat exchanger // 2141089
The invention relates to heat exchange apparatus and can be used in chemical, petrochemical, food, pharmaceutical, perfumery, machinery and other industries

The heat exchanger // 2141088
The invention relates to the field of heat and can be used in alumina production for regenerative heating of raw autoclaved slurry warm boiled pulp

The heat exchanger // 2137078

Capacitor // 2135919
The invention relates to capacitors used in automotive air conditioning systems

The invention relates to heat exchange devices of vehicles and can be used in the automotive industry

The invention relates to the field of space technology, and in particular to systems create conditions crews orbital space stations during the flight

Heat pump stirling // 2141608
The invention relates to the field of refrigeration gas regenerative machines running on reverse Stirling cycle and used as heat pumps for systems of decentralized heat supply
Up!