JP2007099131A - Freezing vehicle with superconductive equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decrease the side and weight of a refrigerating means by sharing the refrigerating means for refrigerating both superconductive equipment and a refrigerating room for refrigerating carried articles, concerning the refrigerating means mounted on a freezing vehicle efficiently refrigerating the superconductive equipement and the refrigerating room by sharing the refrigerating mounted on the freezing vehicle for refrigerating both superconductive equipement and refrigerating room or using the low temperature of the refrigerating room for refrigerating the superconductive equipement. <P>SOLUTION: The freezing vehicle with the superconductive equipment comprises a superconductive motor 12 for driving a vehicle, the refrigerating room 11 refrigerating the carried articles, and a freezer 21. A compressor 22 of the freezer 21 is connected to a cold head 24 for refrigerating the superconductive equipment, and to a cold head 25 for refrigerating the refrigerating room. Compressed gas is supplied into these cold heads 24, 25 from the compressor 22 by switching. The cold head 24 for refrigerating the superconductive equipment refrigerates liquid nitrogen (coolant) for refrigerating the superconductive equipment to superconducting refrigerating temperature, and the cold head 25 for refrigerating the refrigerating room supplies gas which is made to have refrigerating temperature or cold keeping temperature into the refrigerating room 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigeration vehicle including a superconducting device, and more particularly, to efficiently cool a superconducting device including a superconducting motor and a superconducting generator mounted on the refrigeration vehicle and a cooling chamber for cooling a transported object.

  2. Description of the Related Art In recent years, in order to improve the concern about exhaustion of fuel resources such as gasoline and environmental deterioration due to exhaust gas exhausted from an internal combustion engine, development of an electric vehicle that runs by driving a motor with electricity has been advanced. When a normal conducting motor is used as the motor, there is a problem that copper loss occurs due to electrical resistance, resulting in low efficiency, and an induced current is attenuated, resulting in low output. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 6-6907 (Patent Document 1), if a superconducting motor is employed, copper loss in the superconductor portion can be eliminated and high efficiency can be achieved. There is an advantage that it is possible to reduce the size and increase the output.

  In order to exhibit the superconducting characteristics of the superconducting motor, it is necessary to cool to a very low temperature, and the use of liquid hydrogen, liquid nitrogen, various refrigerators, and the like has been studied.

  By the way, the refrigerator car provided with the cooling chamber which cools a conveyed product is provided with the refrigerator for cooling a cooling chamber. When operating a superconducting motor in such a refrigeration vehicle, cooling the superconducting motor and the cooling chamber completely separately would be very inefficient, resulting in a large refrigerator and poor fuel consumption. There is a problem of high cost.

JP-A-6-6907

  The present invention has been made in view of the above problems, and does not completely cool the superconducting equipment and the cooling chamber mounted on the refrigerator car, but use the cooling means for cooling the superconducting equipment and the cooling chamber. It is an object to efficiently cool the superconducting device and the cooling chamber by sharing them or using the low temperature of the cooling chamber for cooling the superconducting device.

In order to solve the above problems, the present invention firstly includes a superconducting device comprising a superconducting motor for driving a vehicle and / or a superconducting generator, a cooling chamber for cooling a transported article, and a refrigerator.
The refrigerator is provided with a superconducting device, wherein the refrigerator is shared for cooling the superconducting device and cooling the cooling chamber.

According to the above configuration, since the refrigerator mounted on the refrigerator is shared for cooling the superconducting equipment and cooling the cooling chamber, it is not necessary to provide a refrigerator for each of the superconducting equipment and the cooling chamber. The size and weight can be reduced, and the cost can be reduced.
The refrigerator car is not limited to a car that freezes a transported article, but may include a vehicle that can refrigerate or keep a transported object as long as it can store the transported article at a temperature lower than room temperature.

  The compressor of the refrigerator is connected to the cold head for cooling the superconducting equipment and the cold head for cooling the cooling chamber, and the compressed gas is supplied to the cold head by switching from the compressor, for cooling the superconducting equipment. The cold head preferably cools the superconducting equipment cooling refrigerant to the superconducting cooling temperature, and the cooling chamber cooling cold head supplies the cooling chamber with a gas having a refrigeration temperature or a cold storage temperature.

According to the above configuration, since the compressor of the refrigerator is shared for cooling of the superconducting equipment and cooling of the cooling chamber, the cold head is provided for each of the superconducting equipment and the cooling chamber, so that the compressed gas supplied from the compressor can be used. Each can be expanded moderately with a cold head. As a result, the superconducting device can be cooled to a required temperature of about 77 Kelvin and the cooling chamber to a required temperature of about minus 10 to 0 degrees.
The compressed gas may be supplied simultaneously from the compressor to the cold head for cooling the superconducting equipment and the cold head for cooling the cooling chamber.

  The superconducting motor and the superconducting generator are both provided, an engine that operates the superconducting generator, and a battery that stores the electric power generated by the superconducting generator, and the electric power stored from the battery is stored in the refrigeration. It is preferable to supply the machine as operating power.

Conventionally, an engine is operated to generate electricity with an alternator, and this electric power is driven by supplying it to a compressor motor to cool the cooling chamber. Therefore, the engine must be kept running while cooling the cooling chamber. I can not stop idling.
On the other hand, according to the said structure, since the refrigerator is operated with the electric power stored in the battery, even if the engine is stopped, the cooling chamber can be maintained at the required temperature by the refrigerator. Therefore, idling can be stopped and the amount of carbon dioxide emission can be reduced.
In addition, since the superconducting motor, the superconducting generator, and the cooling chamber are cooled by a single refrigerator, the refrigerator is not greatly increased in size and weight.
Furthermore, since a superconducting generator is used as the generator, power can be generated very efficiently.

Secondly, the present invention provides a superconducting device comprising a superconducting motor for driving a vehicle and / or a superconducting generator, a cooling chamber for cooling a transported object, a refrigerator for cooling the superconducting device, and a cooling chamber cooling device. Each equipped with a refrigerator,
A refrigerator is provided in which the refrigerator for cooling the superconducting equipment is disposed in the cooling chamber.

  According to the said structure, since the refrigerator is previously arrange | positioned in the cooling chamber lower than normal temperature, what is necessary is just to cool a refrigerator from the low temperature of a cooling chamber to superconducting temperature (for example, 77 Kelvin), from normal temperature to superconducting temperature. The load on the refrigerator can be reduced as compared with the case where the cooling is performed.

Furthermore, the present invention thirdly includes a superconducting device composed of a superconducting motor for driving a vehicle and / or a superconducting generator, a cooling means for the superconducting device, and a cooling chamber for cooling a conveyed item,
The cooling means for the superconducting equipment is provided with means for cooling the cooling chamber by supplying a refrigerant evaporated for cooling the superconducting equipment into the cooling chamber. Yes.

According to the said structure, the refrigerant | coolant heated up by cooling a superconducting apparatus can be reused for cooling of a cooling chamber. Further, since the refrigerant is extremely low in temperature even when the temperature is increased by cooling the superconducting device, the cooling chamber can be sufficiently cooled even with a small amount of refrigerant.
As the refrigerant, liquid nitrogen or liquid hydrogen is preferably used.
In this case as well, a refrigerator may be provided for cooling the cooling chamber, and the refrigerator may be used as an auxiliary when the cooling chamber cannot be sufficiently cooled only by the refrigerant.

  As described above, according to the first aspect of the present invention, the refrigerator mounted in the refrigerator is shared for cooling the superconducting equipment including the superconducting motor and the superconducting generator and cooling the cooling chamber for cooling the transported goods. In addition, it is not necessary to provide a refrigerator for each of the superconducting equipment and the cooling chamber, and the refrigerator can be reduced in size and weight, and the cost can be reduced.

  Further, according to the second aspect of the present invention, since the refrigerator is disposed in the cooling chamber lower than room temperature in advance, the refrigerator may be cooled from the low temperature of the cooling chamber to the superconducting temperature (for example, 77 Kelvin), Compared to cooling from room temperature to superconducting temperature, the load on the refrigerator can be reduced.

Furthermore, according to the third invention, the refrigerant whose temperature has been increased by cooling the superconducting device can be reused for cooling the cooling chamber, and a refrigerator is not required or a refrigerator is installed for auxiliary purposes. Even so, the load on the refrigerator can be reduced.
As described above, according to the present invention, the cooling of the superconducting device and the cooling chamber can be performed by sharing the refrigerator and the refrigerant for cooling the superconducting device and the cooling chamber, or by using the low temperature of the cooling chamber for cooling the superconducting device. Can be performed efficiently.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a first embodiment of the present invention, and a refrigerator car 10 is commonly used for cooling a cooling chamber 11 for cooling a transported object, a superconducting motor 12 for driving a vehicle, and cooling the cooling chamber 11 and the superconducting motor 12. A refrigerator 21 is provided. In the present embodiment, the refrigerator 21 is disposed outside the cooling chamber 11.

  The refrigerator 21 includes a compressor 22, a cold head 24 for cooling the superconducting equipment connected to the compressor 22 via an outward piping 23, and a cold head 25 for cooling the cooling chamber. The pipe 23 is bifurcated on the cold heads 24 and 25 side, and ends of the branch side are connected to the cold heads 24 and 25. A control valve 26 is provided at a branch position of the pipe 23, and the supply of the compressed gas compressed by the compressor 22 to the cold heads 24 and 25 is controlled by the control valve 26. In addition, the compressor 22 and the cold heads 24 and 25 are connected via return pipes 27 and 28.

The superconducting motor 12 is accommodated in a cooling container 13, and liquid nitrogen serving as a refrigerant is stored in the cooling container 13. The outer surface of the cooling container 13 is brought into contact with the cold head 24, and the liquid nitrogen in the cooling container 13 is cooled to a superconducting cooling temperature of about 77 Kelvin by the cold head 24, and the superconducting motor 12 is cooled to the required temperature by the cooled liquid nitrogen. It is set as the structure cooled to.
The superconducting motor 12 and the refrigerator 21 are operated by electric power supplied from a battery (not shown) that stores electric power generated by an alternator (not shown).

Next, the cooling method of the cooling chamber 11 and the superconducting motor 12 by the refrigerator 21 will be described.
First, the supply destination of the compressed gas compressed by the compressor 22 is controlled by the control valve 26 provided at the branch position of the pipe 23, and the compressed gas is switched and supplied to the cold heads 24 and 25 in a time-sharing manner.
Next, the compressed gas supplied to the cold heads 24 and 25 is expanded by the cold heads 24 and 25 to take away the surrounding heat, thereby cooling the superconducting motor 12 and the cooling chamber 11 respectively. Specifically, the liquid nitrogen is cooled by the cold head 24 of the refrigerator 21, and the superconducting motor 12 is cooled to the superconducting temperature via the liquid nitrogen. The superconducting motor 12 is supplied with electric power from a battery (not shown) that stores electric power generated by an alternator (not shown), and drives the refrigerator 10. On the other hand, the gas cooled to the required refrigeration temperature or the cold storage temperature by the cold head 25 of the refrigerator 21 is supplied to the cooling chamber 11, and the transported goods stored in the cooling chamber 11 are refrigerated and kept at the required temperature.
Finally, the gas expanded by the cold heads 24 and 25 is returned to the compressor 22 through the pipes 27 and 28 and is compressed by the compressor 22 again.

According to the said structure, since the refrigerator 21 mounted in the refrigerator car 10 is shared by the cooling of the superconducting motor 12 and the cooling chamber 11 which cools a conveyed product, it is respectively for the superconducting motor 12 and the cooling chamber 11 There is no need to provide a refrigerator, the refrigerator can be reduced in size and weight, and the cost can be reduced.
The cold head may be directly contacted with the superconducting motor for cooling. However, if the refrigerant is used as in the present embodiment, cold heat can be stored in the refrigerant, so that the refrigerant is sufficiently cooled. Has the advantage that the cooling chamber can be cooled by the refrigerator, and the cooling chamber can be cooled for a long time by the refrigerator.

FIG. 2 shows a second embodiment of the present invention.
The refrigeration vehicle 30 of the present embodiment includes an engine 50, a superconducting generator 51, and a battery 52 as operating means for the superconducting motor 12 and the refrigerator 31. As with the superconducting motor 12, the superconducting generator 51 is housed in a cooling container 53 that stores liquid nitrogen serving as a refrigerant.

  The superconducting motor 12 and the refrigerator 31 are operated by generating power by the superconducting generator 51 by operating the engine 50, storing the electric power in the battery 52, and from the battery 52 to the superconducting motor 12 and the refrigerator when necessary. This is done by supplying power to 31.

  The refrigerator 31 includes a compressor 32, a cold head 39 for cooling a superconducting motor connected to the compressor 32 via forward piping 33, 34, 35 and backward piping 36, 37, 38, superconducting power generation A cold head 40 for cooling the machine and a cold head 41 for cooling the cooling chamber are provided. That is, in this embodiment, one refrigerator 31 is shared for cooling the superconducting motor 12, the superconducting generator 51 and the cooling chamber 11.

According to the above configuration, since the refrigerator 31 is operated by the electric power stored in the battery 52, the refrigerator 31 can keep the cooling chamber 11 at a required temperature even when the engine is stopped. Therefore, idling can be stopped and the amount of carbon dioxide emission can be reduced.
Moreover, since the superconducting motor 12, the superconducting generator 51, and the cooling chamber 11 are cooled by one refrigerator 31, it is not necessary to provide a plurality of refrigerators 31, and the refrigerator 31 is greatly increased in size and weight. Nor.
Furthermore, since the superconducting generator 51 is used as a generator, power can be generated very efficiently.
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

FIG. 3 shows a third embodiment of the present invention.
In the refrigerator 60 of the present embodiment, a refrigerator 61 that cools the superconducting motor 12 and a refrigerator 71 that cools the cooling chamber 11 are provided separately, and the refrigerator 61 for cooling the superconducting motor is mounted in the cooling chamber 11. The refrigerator 71 for cooling the cooling chamber is mounted outside the cooling chamber 11.

  The superconducting motor cooling refrigerator 61 includes a compressor 62, and one cold head 65 connected to the compressor 62 via a forward piping 63 and a backward piping 64. Similarly, the refrigerator 71 for cooling the cooling chamber includes a compressor 72 and a single cold head 75 connected to the compressor 72 via a forward piping 73 and a backward piping 74.

  In the same manner as in the first embodiment, the superconducting motor 12 is cooled to the required superconducting temperature by the cold head 65 of the refrigerator 61, and the cooling chamber 11 is cooled to the required refrigeration temperature or cold storage temperature by the refrigerator 71. The

According to the said structure, since the refrigerator 61 for superconducting motor cooling is previously arrange | positioned in the cooling chamber 11 lower than normal temperature, the refrigerator 61 is made from the low temperature of the cooling chamber 11 to superconducting temperature (for example, 77 Kelvin). What is necessary is just to cool and the load concerning the refrigerator 61 can be reduced compared with the case where it cools from normal temperature to superconducting temperature.
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

FIG. 4 shows a fourth embodiment of the present invention.
In the refrigerator car 80 of this embodiment, liquid nitrogen (refrigerant) is used for cooling the superconducting motor 12 and the cooling chamber 11. A liquid nitrogen tank 81 storing liquid nitrogen and a cooling container 82 containing the superconducting motor 12 are provided. The cooling vessel 82 is connected to the liquid hydrogen tank 81 and the cooling chamber 11 via pipes 83 and 84, respectively.

When the superconducting motor 12 is cooled, liquid nitrogen is supplied from the liquid nitrogen tank 81 through the pipe 83 to the cooling vessel 82 to cool the superconducting motor 12 to about 77 Kelvin, and the gaseous nitrogen vaporized by cooling the superconducting motor 12. Is supplied to the cooling chamber 11 through the pipe 84 to cool the cooling chamber 11. In this way, the refrigerant made of liquid nitrogen is shared for cooling the superconducting motor 12 and the cooling chamber 11.
In this embodiment, the refrigerator 71 similar to that of the third embodiment is provided as an auxiliary, and the refrigerator 71 is operated only when the cooling chamber 11 cannot be sufficiently cooled only by cooling with the gaseous nitrogen. In this manner, the cooling chamber 11 is cooled.

According to the above configuration, the gaseous nitrogen vaporized by cooling the superconducting motor 12 can be reused for cooling the cooling chamber 11.
Further, even if the gaseous nitrogen is heated by cooling the superconducting motor 12, it is extremely low in temperature, so that the cooling chamber 11 can be sufficiently cooled even with a small amount.
Furthermore, since the cooling chamber 11 is cooled with gaseous nitrogen, the operating power of the auxiliary refrigerator 71 can be reduced, thereby reducing the operating time of the engine, reducing carbon dioxide emissions, and reducing the cooling cost. In addition, simplification of the refrigerator can be achieved.
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

It is a block diagram of the freezer truck of a 1st embodiment of the present invention. It is a block diagram of the freezing vehicle of 2nd Embodiment of this invention. It is a block diagram of the freezer truck of a 3rd embodiment of the present invention. It is a block diagram of the freezer truck of a 4th embodiment of the present invention.

Explanation of symbols

10, 40, 60, 80 Refrigeration vehicle 11 Cooling chamber 12 Superconducting motor 13 Cooling vessel 21, 31, 61, 71 Refrigerator 22 Compressor 24, 25 Cold head 50 Engine 51 Superconducting generator 52 Battery 81 Liquid nitrogen tank 82 Cooling vessel

Claims (5)

A superconducting device comprising a superconducting motor or / and a superconducting generator for driving the vehicle, a cooling chamber for cooling the transported goods, and a refrigerator;
A refrigerator truck provided with a superconducting device, wherein the refrigerator is commonly used for cooling the superconducting device and cooling a cooling chamber.   The compressor of the refrigerator is connected to the cold head for cooling the superconducting equipment and the cold head for cooling the cooling chamber, and the compressed gas is supplied to the cold head by switching from the compressor, for cooling the superconducting equipment. The cold head of the present invention cools the refrigerant for cooling the superconducting equipment to a superconducting cooling temperature, and the cold head for cooling the cooling chamber supplies the cooling chamber with a gas having a refrigeration temperature or a cold storage temperature. A refrigeration vehicle equipped with the described superconducting equipment.   The superconducting motor and the superconducting generator are both provided, an engine that operates the superconducting generator, and a battery that stores the electric power generated by the superconducting generator, and the electric power stored from the battery is stored in the refrigeration. A refrigerating vehicle comprising the superconducting device according to claim 1 or 2, wherein the operation power is supplied to the machine. Superconducting equipment consisting of a superconducting motor for driving the vehicle and / or a superconducting generator, a cooling chamber for cooling the transported goods, a refrigerator for cooling the superconducting equipment and a refrigerator for cooling the cooling chamber,
A refrigeration vehicle characterized in that a refrigerator for cooling the superconducting equipment is disposed in the cooling chamber. A superconducting device composed of a superconducting motor for driving a vehicle and / or a superconducting generator, a cooling means for the superconducting device, and a cooling chamber for cooling a transported object,
The cooling means for the superconducting equipment includes a means for supplying the refrigerant evaporated for cooling the superconducting equipment into the cooling chamber to cool the cooling chamber.

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