KR101917505B1 - Refrigerant air conditioning system without compression system - Google Patents

Abstract

The present invention eliminates the conventional refrigerant compression method and refrigerant gas refrigerant which require compression, cooling and expansion of a refrigerant, cooling the secondary refrigerant by using cold heat generated when vaporizing liquefied natural gas (LNG) The present invention relates to a refrigeration and air conditioning system that excludes a refrigerant compression system capable of cooling and operating a cargo hold efficiently through a simplified system by using a method of transferring cool air emitted from a secondary refrigerant after being cooled to each of the cargo holds.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigerant air conditioning system,

The present invention relates to a refrigerant air conditioning system that excludes a refrigerant compression system, and more specifically, to a refrigeration system that excludes the use of a refrigerant compression system and a refrigerant gas refrigerant, which require compression, cooling, and expansion of refrigerant, LNG) is cooled to cool the secondary refrigerant, and then the cold air emitted from the cooled secondary refrigerant is transferred to each of the cargo holds. By using the simplified system, the cargo can be efficiently cooled and operated And a refrigerant compression system that can be used in a refrigeration system.

As global warming and concern for the global environment have increased, environmental regulations for emissions have been taking place. This means that the use of conventional fossil fuel-based power generation systems, such as thermal power generation, It is urging change.

For example, in the case of ships, emission of SOx, NOx, carbon dioxide, etc. of ship exhaust gas is restricted due to the provisions of IMO MARPOL Annex VI, and the effective date will be enforced from 2020.

Therefore, in the case of the ship's refrigeration system, freon refrigerant is used to set the refrigeration temperature of each cargo hold, but the use of refrigerant is limited due to environmental effects such as ozone layer destruction.

In addition, the ship's refrigeration system sets the temperature of each cargo hold according to the cooling capacity of the refrigerant. However, when the temperature of the cargo is set to a temperature of minus 60 ° C or less due to the material limit of the refrigerant, This configuration requires additional installation of the electric power facility.

On the other hand, in the case of the land-based refrigerated warehouse, it is possible to implement the additional facility, but it is inevitable to enlarge the space due to the capacity increase of the facility. Especially, in case of the ship which is restricted by such a facility configuration, There is a problem in that a high cost is generated as the capacity of the auxiliary engine increases with the power demand.

In addition, in order to set the temperature of each cargo hold, it is necessary to set the temperature of each cargo hold separately in the ship and the freezing warehouse. Further, since the temperature of the cargo hold is required to be variable, rather than being set to be one-time, problems have arisen due to refrigerant storage, use, mixed use, and the like depending on the cooling ability of each refrigerant.

Accordingly, the present inventors have proposed a refrigerant compression method and a refrigerant gas refrigerant which require compression, cooling and expansion of a refrigerant in order to solve the problems of conventional refrigerant refrigerants and various environmental problems and limitations thereof By using the method of cooling the secondary refrigerant by using the cold heat generated when vaporizing the liquefied natural gas (LNG) and then transferring the cool air emitted from the cooled secondary refrigerant to each cargo hold, a simplified system A refrigeration and air conditioning system that excludes a refrigerant compression system capable of efficiently cooling and operating a cargo hold has been developed.

Korean Patent No. 10-0333479

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a refrigerant compressor which eliminates the conventional refrigerant compression method and refrigerant compression method which require compression, cooling and expansion of refrigerant, The refrigerant can be cooled and operated efficiently through the simplified system by using the method of cooling the secondary refrigerant by using the cold heat and then transferring the cold air emitted from the cooled secondary refrigerant to the respective hold spaces, And to provide a refrigeration /

The refrigerating and air-conditioning system excluding the refrigerant compression method according to an embodiment of the present invention may include a liquefied fuel supplier for providing a liquefied fuel, a step for evaporating the liquefied fuel, cooling the indirect refrigerant by using the cold heat generated during vaporization of the liquefied fuel And a blower for providing cool air emitted from the cooled indirect refrigerant to each of the cargo hold.

In one embodiment, the indirect refrigerant may flow into the liquefied fuel vaporizer and be re-cooled after circulating the respective hold.

In one embodiment, the liquefied fuel vaporizer includes an indirect refrigerant cooling coil through which the indirect refrigerant circulates, and the cooling temperature of the indirect refrigerant can be controlled according to the rotational speed of the indirect refrigerant cooling coil.

In one embodiment, the indirect refrigerant circulated through the indirect refrigerant cooling coil may be circulated through the indirect refrigerant circulation pipe provided along each of the cargo holds, and may be introduced into the liquefied fuel vaporizer.

In one embodiment, the blower includes a fan (FAN) for introducing cool air, which is emitted from the cooled indirect refrigerant, into each of the cargo holds, and the blowing amount of the cool air is controlled through the rotation speed control of the rotation fan Lt; / RTI >

In one embodiment, the present invention may further include a blowing rate control unit for controlling the rotational speed of the rotary fan.

In one embodiment, the present invention may further comprise a cold delivery pipe for delivering the cool air to the respective hold.

In one embodiment, the present invention further comprises an air conditioner for introducing cool air transferred through the cold air transfer pipe into each of the cargo holds, wherein the air conditioner includes a heat exchanger And a blower for circulating the cool air transferred into each of the cargo holds.

In one embodiment, a circulation volume control valve for controlling the circulation volume of the indirect refrigerant may be provided for each of the indirect refrigerant circulation pipes provided along each cargo hold.

In one embodiment, the present invention further includes a buffer tank in which the indirect refrigerant circulating through each hold is collected and stored, and the indirect refrigerant stored in the buffer tank may be introduced into the liquefied fuel vaporizer and re-cooled .

In one embodiment, the liquefied fuel may be liquefied natural gas (LNG).

According to an aspect of the present invention, there is provided a refrigeration system for a refrigeration cycle, comprising: a compressor for compressing, cooling and expanding a refrigerant; The present invention has an advantage that the cargo window can be efficiently cooled through the simplified system by using the system in which the cold refrigerant is cooled and the cold air emitted from the cooled secondary refrigerant is delivered to each of the cargo holds.

Further, according to one aspect of the present invention, the use of the refrigerant of the refrigerant gas is excluded, which is advantageous in that it is more environmentally friendly and can solve environmental problems such as ozone layer destruction.

According to an aspect of the present invention, a refrigerant compression method that requires compression, cooling, and expansion of a refrigerant is excluded, thereby simplifying the system through merely cooling and transferring refrigerant. Also, It is possible to operate the freezing storage window even at a temperature below.

1 is a view schematically showing a configuration of a refrigeration and air conditioning system 100 excluding a refrigerant compression method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.

1 is a view schematically showing a configuration of a refrigeration and air conditioning system 100 excluding a refrigerant compression method according to an embodiment of the present invention.

1, a refrigeration and air conditioning system 100 excluding a refrigerant compression method according to an embodiment of the present invention includes a liquefied fuel supplier 110, a liquefied fuel vaporizer 120, and a blower 130 Lt; / RTI >

Here, in the present invention, liquefied fuel may refer to liquefied natural gas (LNG). Liquefied natural gas (LNG) is obtained by purifying methane (CH4) obtained by purifying natural gas collected in a gas field LNG is a liquefied fuel that has been cooled to 163 degrees and compressed to 600 times the liquefied state. Such LNG generates cold energy when vaporized.

Methane is known to be significantly reduced in sulfur dioxide and nitrogen oxide emissions compared to conventional fossil fuels, and its greenhouse gas emissions are reduced by 30%. Particularly, in the case of LNG, the liquefaction temperature belongs to the cryogenic temperature of minus 163 degrees Celsius, and when it is used as fuel for the ship, it is heated up to 45 degrees in vaporization. When such cryogenic LNG is used as means for cooling the coolant, The refrigerant can be replaced.

Therefore, in the present invention, such LNG is to be used in place of the propane-based gas refrigerant.

First, the liquefied fuel supplier 110 supplies LNG to a liquefied fuel vaporizer 120, which will be described later, by using a power source such as an engine such as a ship. Generally, A detailed description thereof will be omitted.

The liquefied fuel vaporizer 120 may vaporize the liquefied fuel supplied from the liquefied fuel supplier 110 and may cool the indirect refrigerant using the cold heat generated when vaporizing the liquefied fuel. To change the liquefied fuel into the gaseous state.

The indirect refrigerant cooling coil 121 for circulating the indirect refrigerant is provided inside the liquefied fuel vaporizer 120. The indirect refrigerant cooling coil 121 is a pipe for circulating the indirect refrigerant ), But may be formed in a coil shape rotated several times in order to maximize the surface area with the liquefied fuel.

Therefore, the surface area of the indirect cooling refrigerant coil 121 and the vaporized liquefied fuel is maximized due to the coil shape of a plurality of twisted shapes, which means that the cooling capacity of the indirect refrigerant is maximized.

In the case where the indirect refrigerant cooling coil 121 is in the form of a twisted coil several times, the surface area between the indirect refrigerant and the liquefied fuel becomes maximum according to the number of rotations of the indirect refrigerant cooling coil 121, Can be adjusted.

In the present invention, the indirect refrigerant may refer to a general secondary refrigerant or brine. The reason why the refrigerant is referred to as indirect refrigerant is that the refrigerant is cooled indirectly by the cold heat generated during vaporization of the liquefied fuel, Because it emits cold air. It should be understood that this may be interpreted in the sense that it is in contrast to the primary refrigerant such as ammonia and freon, and the kind of the indirect refrigerant is not limited.

The indirect refrigerant cooling coil 121 provided inside the liquefied fuel vaporizer 120 is circulated through the indirect refrigerant circulation pipe 122 provided along each of the cargo holds to be supplied to the liquefied fuel vaporizer 110 A circulation volume control valve 123 for controlling the circulation volume of the indirect refrigerant may be provided for each indirect refrigerant circulation pipe 122 provided along each cargo hold in the embodiment.

The circulation amount control valve 123 controls the amount of circulation of the indirect refrigerant circulated along the pipe 122 for indirect refrigerant circulation so that the divergence amount of the cold air can be adjusted accordingly.

The indirect refrigerant circulated through the indirect refrigerant circulation pipe 122 provided along each of the cargo holds is collected and stored in the buffer tank 124. The indirect refrigerant collected and stored in the buffer tank 124 is supplied to the The indirect refrigerant circulated in the reservoir tank 124 may be re-introduced into the liquefied fuel vaporizer 120 and re-cooled. Alternatively, if the indirect refrigerant circulation pipe 122 provided along the cargo space lacks the indirect refrigerant, It may be supplemented with.

Next, the blowing section 130 includes a rotary fan (FAN) 131 for providing cool air, which is emitted from the indirect refrigerant cooled through the above-mentioned indirect refrigerant cooling coil 121, At this time, the cold air blowing amount of the indirect refrigerant can be controlled through the rotation speed control of the rotation fan 131. [

In order to achieve this, the present invention may further include a blowing rate control unit (not shown) for controlling the rotational speed of the rotating fan 131. As the rotational speed of the rotating fan 131 increases, The cool air can be introduced into the cool air inflow portions (not shown) of the respective hold. When the rotation speed of the rotation fan 131 is lowered, the cool air can be introduced into the respective cool air inflow portions with a smaller amount.

In this case, the cooling fan 132 may further include a cool air transfer pipe 132 to transfer the cool air generated by the rotation of the rotation fan 131 to the cool air inflow portion of each cargo hold.

The cold air delivery pipe 132 may be a kind of duct (DUCT) for delivering the cool air generated by the rotation fan 131 to each hold by each coolant transfer pipe 132, The cool air distributed to the cargo holds can be introduced into each cargo hold through the air conditioner 133.

The air conditioner 133 may include a heat exchanger 133a for exchanging heat between cold air emitted from the indirect refrigerant and the inside of the cargo hold, and a heat circulation blower 133b for circulating the cool air transferred into the cargo hold.

That is, the rotating fan 131 of the blowing section 130 rotates to form an air flow for the cold air of the indirect refrigerant, which is transmitted to the cold air inflow section of each hold through the cold air transfer pipe 132, The refrigerant flowing into the cargo hold can be introduced into the cargo hold through the air conditioner 133 provided for each cold air inflow portion.

Meanwhile, the liquefied fuel vaporized in the liquefied fuel vaporizer 120 described above may be recovered and stored in the LNG fuel tank, and in one embodiment may be liquefied and supplied to the liquefied fuel supplier 110.

With the above arrangement, only LNG, which is a natural gas, is used instead of the Freon gas to cool the indirect refrigerant that radiates cool air flowing into each of the cargo holds. Therefore, the LNG is environmentally friendly, It is advantageous in that the problems due to the mixed use of the refrigerant are solved at the beginning, and in particular, since the indirect refrigerant, which is the secondary refrigerant, is used instead of the pro-on-gas refrigerant, It is possible to simplify and miniaturize it, and it has an advantage that it can be applied more efficiently to a ship which is restricted by the configuration of the facility.

As can be seen from the above, according to the structure of the present invention, the capacity of the ship's generator can be made smaller than the capacity for operating the refrigeration and air-conditioning system, and the space utilization of the ship Environmentally, it can have a great advantage in that it uses environmentally friendly natural gas rather than Freon gas refrigerant that destroys the ozone layer.

In addition, in accordance with international environmental regulation, if it is assumed that the cold heat generated in the case of gasification of natural gas has not been used in the conventional case, the present invention can use the natural heat of cold natural gas to cool the refrigeration warehouse, In terms of being able to be reused in the industry, energy saving and space utilization are maximized, resulting in remarkable cost saving.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that it is possible.

100: Refrigeration and air conditioning system
110: liquefied fuel supplier
120: liquefied fuel vaporizer
121: Coil for cooling
122: Pipe for indirect refrigerant circulation
123: Circulation volume control valve
124: Buffer tank
130:
131: Fan for rotation
132: cold air delivery pipe
133: Air conditioner
133a: heat exchanger
133b: Blower for heat circulation

Claims (10)

A liquefied fuel supplier for providing liquefied fuel corresponding to liquefied natural gas (LNG);
The indirect refrigerant corresponding to the SECONDARY REFRIGERANT is cooled by vaporizing the liquefied fuel and using the cold heat generated when vaporizing the liquefied fuel, and the refrigerant is circulated many times in the form of a pipe in which the indirect refrigerant circulates, And a cooling temperature of the indirect refrigerant is controlled according to the number of revolutions of the indirect refrigerant cooling coil;
And a blower for providing cool air, which is emitted from the cooled indirect refrigerant, to each of the cargo holds,
The indirect refrigerant circulates through the indirect refrigerant circulation pipe provided along each of the cargo holds and then flows into the liquefied fuel vaporization unit and is re-cooled. The indirect refrigerant circulated along the indirect refrigerant circulation pipe is collected and stored in the buffer tank. The indirect refrigerant stored in the buffer tank replenishes the indirect refrigerant amount in the indirect refrigerant circulation pipe through the indirect refrigerant stored in the buffer tank and the indirect refrigerant collected and stored in the buffer tank Wherein the indirect refrigerant flowing into the liquefied fuel vaporizing unit and re-cooled through the indirect refrigerant circulating pipe is regulated in quantity of cool air through the circulation rate control valve.
delete delete The method according to claim 1,
The blower
And a rotating fan (FAN) for allowing cool air, which is emitted from the cooled indirect refrigerant, to flow into each of the cargo holds,
Wherein the blowing amount of the cool air is controlled by controlling the rotation speed of the rotary fan.
5. The method of claim 4,
And a blowing amount control unit for controlling the number of rotations of the rotary fan. The refrigeration and air conditioning system excluding the refrigerant compression method.
The method according to claim 1,
And a cool air delivery pipe for delivering the cool air to each of the cargo holds.
The method according to claim 6,
And an air conditioner for introducing cool air transferred through the cold air transfer pipe into each of the cargo holds,
Wherein the air conditioner comprises: a heat exchanger for exchanging the cool air and the air in each of the cargo holds; And
And a circulation fan for circulating the cool air transferred into each of the cargo holds, wherein the refrigerant compression system is eliminated.
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