WO2015115228A1

WO2015115228A1 - Method for maintaining temperature of object, method for maintaining temperature of object in engine room of ship, and ship

Info

Publication number: WO2015115228A1
Application number: PCT/JP2015/051213
Authority: WO
Inventors: 浩一早船; 剛史小玉; 中村　健一
Original assignee: 三井造船株式会社
Priority date: 2014-01-28
Filing date: 2015-01-19
Publication date: 2015-08-06
Also published as: JP2015140055A; CN105916766A; KR20160120272A; JP6223842B2

Abstract

In order to suppress heat transfer from a first gaseous body (G1) around an object (20) to the object (20) and maintain the temperature (Tc) of the object (20) within a preset temperature range (Rt), a temperature maintenance gaseous body (G2) having a temperature (Tb) that is different from the temperature (Ta) of the first gaseous body (G1) and the temperature (Tb) within the temperature range (Rt) to be maintained by the object (20) is passed along the surface of the object (20) to cover the surface of the object (20) with the temperature maintenance gaseous body (G2) to thereby suppress heat transfer between the first gaseous body (G1) and the object (20) and maintain the temperature (Tb) of the object (20) within the temperature range (Rt) without especially providing a cooling device and the like.

Description

Method for maintaining temperature of object, method for maintaining temperature of object in engine room of ship, and ship

The present invention does not require a cooling device or the like, and can maintain the temperature of the object within a preset temperature range, a method for maintaining the temperature of the object, a method for maintaining the temperature of the object in the engine room of the ship, and , Relating to ships.

In recent years, in order to prevent the movement of the ballast water used for ship draft adjustment, etc., between microorganisms, the microorganisms contained in the ballast water must be killed when the ballast water is released. Therefore, it has been required to provide a ship with a ballast water treatment device.

In this ballast water treatment apparatus, for example, as described in Japanese Patent Application Publication No. 2007-144391, Japanese Application Publication No. 2013-39516, Japanese Application Publication No. 2012-217914, Some use chemicals of chlorine disinfectants such as sodium chlorate and calcium hypochlorite, and the chemicals are stored in trucks, cranes, chain blocks, etc., easily to the equipment that uses the chemicals. A place in the engine room that can be suitable.

However, in this temperature control during storage of chemicals, an upper limit temperature (for example, 35 ° C. for calcium hypochlorite) is specified in order to suppress decomposition of the chemicals. The temperature in the engine room is rising due to the heat generated by the auxiliary equipment such as the machine. The upper limit of the temperature in the engine room of general merchant ships is 45 ° C. according to the classification rules, and the temperature of the air in the engine room often exceeds the upper limit temperature for storing chemicals.

Therefore, when storing in the engine room, for example, as described in Japanese Patent Application Publication No. 2007-144391, a chemical for ballast water treatment is cooled in advance and stored in a storage tank equipped with a heat insulating device. Cooling devices such as heat exchangers and chiller units that store or use a cooling heat exchanger that uses cooling water as a refrigerant, or are described in, for example, Japanese Patent Application Laid-Open No. 2013-39516 It has been proposed to use a heating device or the like. However, in these cases, in order to store the chemicals for ballast water treatment, new equipment such as a heat exchanger is required, which increases the cost.

On the other hand, it is conceivable that the medicine is stored in a residential area in the superstructure located above the engine room. However, in this case, it is necessary to change a part of the residential area, which has strict space requirements, to a chemical storage room, and between the chemical storage room and the engine room in the residential area, Is normally not provided, there is a problem that a chemical container having a weight exceeding 20 kg · f is manually transported to the engine room.

Japanese Patent Application Publication No. 2007-144391 (paragraphs [0019], [0020]) Japanese Patent Application No. 2013-39516 (paragraphs [0021], [0040]) Japanese Patent Application No. 2012-217914 (paragraph [0015])

The present invention has been made in view of the above-described situation, and the object thereof is an object such as a chemical for ballast water treatment from a surrounding gas body such as air in an engine room without requiring a cooling device or the like. Provided is a method for maintaining a temperature of an object, a method for maintaining a temperature of an object in an engine room of a ship, and a ship capable of suppressing the movement of heat to the object and maintaining the temperature of the object within a preset temperature range. There is.

In order to achieve the above object, the object temperature maintenance method of the present invention suppresses heat transfer from the first gas body around the object to the object, and sets the temperature of the object in advance. In the method for maintaining a temperature of an object to be maintained within a set temperature range, a temperature maintaining gas body having a temperature different from the temperature of the first gas body and within the temperature range maintained by the object. Flowing over the surface of the object and covering the object with the temperature maintaining gas body, thereby suppressing the heat transfer between the first gas body and the object, and the temperature of the object It is the method characterized by maintaining.

According to this method, the target object is covered with the temperature maintaining gas body having a temperature within the temperature range maintained by the target object, and therefore, the high temperature or low temperature first gas body and the target are covered by the shielding effect of the temperature maintaining gas body. Heat transfer between objects can be suppressed. Thereby, it can prevent that the temperature of a target object approaches the temperature of a 1st gas body, and also makes the temperature of a target object close to the temperature of the temperature maintenance gas body by heat exchange between the temperature maintenance gas bodies. Therefore, the temperature of the object can be maintained within the target temperature range.

That is, the object can be prevented from being warmed by the first gas body having a temperature higher than that of the object or the object being cooled by the first gas body having a temperature lower than that of the object. Since the object is only covered with the maintenance gas body, a complicated device such as a cooling device is unnecessary, and the object is prevented from being heated or cooled at a low cost with a very simple device. it can.

In the temperature maintaining method of the object, the first gas body is air in an engine room of a ship, and the temperature maintaining gas body is outside air introduced from outside the engine room or an area having air conditioning. When the air is introduced from the outside, normally, the combustion air for the main engine and auxiliary equipment and the cooling air are introduced from the outside air into the engine room. By using the air, the temperature of the object placed in the engine room can be maintained within the maintenance target temperature range with a very simple mechanism.

In addition, this “outside air introduced from outside the engine room” includes not only outside air directly introduced from outside the ship but also outside air introduced from outside the ship through an inboard area different from the engine room.

That is, the temperature in the engine room rises due to the heat generated by the operation of the main engine, auxiliary machinery, etc., and the temperature of the air in the engine room becomes close to 45 ° C. When exposed to air close to ℃, heat is exchanged with the air in the engine room, resulting in a temperature close to that in the engine room. By covering, the temperature of the object can be maintained near the temperature of the outside air or air-conditioned air.

In the above method for maintaining the temperature of an object, when the object is a chemical container containing a chemical used in a ballast water treatment apparatus for treating ballast water of a ship, it is necessary to maintain the temperature at 35 ° C. or lower. The temperature of chemicals used in ballast water treatment such as certain sodium hypochlorite and calcium hypochlorite can be maintained in the vicinity of the temperature of the temperature maintaining gas body such as outside air.

In addition, the method for maintaining the temperature of the object in the engine room of the ship for achieving the above-described object, the object that maintains the temperature placed in the engine room of the ship within a preset temperature range, The temperature of the object is maintained by introducing outside air from outside the engine room or air introduced from an area with air conditioning, and flowing and covering the introduced outside air or air over the surface of the object. It is a method.

According to this method, the temperature of the object placed in the engine room of the ship can be adjusted to the outside air or air by a very simple method of simply flowing outside air or air-conditioned air to the object without requiring a cooling device or the like. It can be maintained near the temperature of the conditioned air.

In addition, a ship for achieving the above object includes an object placement place for placing a temperature maintenance object in the engine room of the ship, and a surface of the object placed at the object placement place outside the engine room. Is provided with an outside air introduction mechanism for flowing outside air introduced from the area or air introduced from an area with air conditioning.

According to this configuration, even in an engine room where the air is close to 45 ° C., the temperature of the object placed at the object placement location can be maintained near the outside air temperature or the temperature of the air-conditioned air.

In the above-described ship, the outside air introduction mechanism is provided in the branch duct, and a branch duct that branches outside air from the outside air introduction duct for cooling the engine in the engine room and guides it to the vicinity of the object placement location. When configured with an opening for discharging outside air to the object placement location, the temperature of the object placed at the object placement location can be maintained near the outside air temperature with a very simple mechanism. it can.

In this case, if the opening is provided above the object placement location, the temperature of the outside air is lower than the temperature of the air in the engine room, the density of the outside air is larger than the density of the air in the engine room, and the outside air Since it is heavier than the air in the engine room, a downward flow is generated only by providing the opening, and the outside air can be flowed to the object placement place without providing a special air blowing mechanism.

In the above-mentioned ship, when the object is a chemical used in a ballast water treatment apparatus that treats the ballast water of the ship, the object is placed at the object placement place even in an engine room where the air is close to 45 ° C. In addition, the temperature of the chemical for the ballast water treatment apparatus can be maintained in the vicinity of the outside air temperature, and the quality of the chemical that is vulnerable to high temperatures can be maintained.

According to the method for maintaining a temperature of an object of the present invention, a method for maintaining a temperature of an object in an engine room of a ship, and a ship, the object is a temperature maintaining gas body having a temperature within a target temperature range to be maintained by the object. Since the object is covered, heat transfer between the first gas body having a temperature higher or lower than that of the object and the object can be suppressed, and heat exchange can be performed with the temperature maintaining gas body having a temperature within the target temperature range. Therefore, the temperature of the object can be maintained within a target temperature range to be maintained.

In this method, the object can be prevented from being warmed by the first gas body having a temperature higher than that of the object, or being cooled by the first gas body having a temperature lower than that of the object. Since the object is simply covered with the temperature maintaining gas body, a complicated device such as a cooling device is unnecessary, and the object is a very simple device at low cost. It can be prevented from being heated or cooled.

In other words, for a chemical or other object whose temperature conditions are specified at the time of storage, the area around the place where it is stored is surrounded by air at a temperature equal to or higher than the specified upper limit temperature. For the purpose of storing in an environment such as, a structure that can introduce a temperature maintaining gas body at a temperature equal to or lower than the upper limit temperature, such as outside air, from outside the environment where the storage is located to the storage location. By using this temperature maintaining gas body such as the outside air, even if the environmental temperature is higher than the specified temperature of the target object such as the chemical container, the temperature around the target object such as the chemical container is equal to the storage temperature or It is possible to keep the temperature below the upper limit temperature, and it becomes possible to satisfy the temperature condition for storage of an object such as a chemical container.

FIG. 1 is a schematic side cross-sectional view of an engine room showing an object arrangement location and an outside air introduction mechanism in a ship according to an embodiment of the present invention. FIG. 2 is a schematic plan view of the engine room showing the object placement location and the outside air introduction mechanism in the ship according to the embodiment of the present invention. FIG. 3 is an enlarged view of the vicinity of the object placement location of FIG.

Hereinafter, an object temperature maintaining method, an object temperature maintaining method in an engine room of a ship, and a ship according to an embodiment of the present invention will be described with reference to the drawings. Here, a case where a storage place for placing an object is provided in the engine room of a ship will be described as an example, and a chemical container of a ballast water treatment apparatus will be described as an example, but the temperature of the object of the present invention will be described. The maintenance method is not necessarily limited to the engine room of the ship, and may be an appropriate temperature maintaining gas body. The target object is not limited to a chemical container, and may be an object that needs to be maintained within a specific temperature range. The present invention may be applied to an environment other than the engine room of a ship and an object other than a chemical container.

First, a description will be given of a ship on which the object temperature maintaining method and the object temperature maintaining method in the engine room of the ship of the present invention are implemented. As shown in FIGS. 1 to 3, a ship 1 according to an embodiment of the present invention includes an engine room 2, a propeller 3, a rudder 4, and the like. The engine room 2 includes a main engine 5, a diesel power generator. An auxiliary machine such as a machine (not shown) and various devices (not shown) are arranged.

And in the ship 1 of this invention, the chemical | medical agent storage place (object placement place) S which is a place which stores and puts the chemical | medical container (object) 20 used for a ballast water treatment apparatus in the engine room 2, and this An outside air introduction mechanism 10 is configured to flow the outside air G2 introduced from outside the engine room 2 into the medicine container 20 arranged in the medicine storage place S. The “outside air introduced from outside the engine room” G2 is not only the outside air directly introduced into the engine room 2 from the outside of the ship, but also an inboard area (for example, a steering machine) It also includes outside air introduced through the chamber 7). Further, instead of the outside air G2 introduced from outside the engine room 2, air introduced from an area with air conditioning (for example, a residential area 8 or an engine control room) may be used.

The chemical container 20 is, for example, a chemical container used for ballast water treatment such as sodium hypochlorite or calcium hypochlorite that needs to be maintained at 35 ° C. or lower during storage. The chemical container 20 is, for example, a 25 kl can with a diameter of 325 mm and a height of about 460 mm. About 6 to 7 cans are placed in the chemical storage place S without being covered. And stored.

The upper limit of the temperature Ta of the air G1 in the engine room 2 is set to 45 ° C. according to classification rules, etc., and the air G1 in the engine room 2 is maintained at a relatively high temperature Ta (for example, 35 ° C. to 45 ° C.). Has been. Here, the air G1 in the engine room 2 becomes the first gas body. In the case of the ship 1, since it is on the sea (including water), the temperature Tb of the outside air G2 is generally planned assuming about −20 ° C. to 35 ° C. The temperature Tc of the chemical container 20 can be used as a temperature maintaining gas body for maintaining the temperature below the upper limit storage temperature (for example, 35 ° C.).

As shown in FIGS. 1 to 3, the outside air introduction mechanism 10 includes a branch duct 12 that branches an outside air introduction duct 11 for introducing outside air G2 into the engine room 2 and leads it to the vicinity of the chemical storage place S. The branch duct 12 is provided with an opening 13 for discharging the outside air G2 to the medicine storage place S.

In this outside air introduction duct 11, by driving the engine room ventilation fan 11a, the outside air G2 is sucked from the outside of the engine room 2, and combustion air, And it supplies for cooling of heat dissipation. The temperature Tb of the outside air G2 is lower than the temperature Ta of the air G1 in the engine room 2, and is within the temperature range Rt (−20 ° C. to 35 ° C.) where the temperature Tc of the chemical container 20 should be maintained. ing.

The engine room ventilation fan 11a is operated not only while the main engine 5 is operating, but also while the auxiliary machine is operating, and is operating almost all of the time. The engine room ventilation fan 11a is stopped when the main engine 5 is stopped. While the main engine 5 is stopped, the main engine 5 does not generate heat and the air G1 in the engine room 2 is stopped. Since the temperature Ta does not increase, the heat transfer from the air G1 in the engine room 2 to the chemical container 20 is also eliminated. Therefore, no particular problem occurs.

Further, since the outside air G2 flows at a predetermined flow rate in the branch duct 12 by the engine room ventilation fan 11a, the outside air G2 flows out from the opening 13 at a certain flow rate. Therefore, although the opening part 13 may be provided in the side and bottom face of the chemical storage place S, it is preferable to provide it above the chemical storage place S.

Normally, it is not necessary to control the flow rate and the flow direction at the opening 13, so it is not particularly necessary to provide a flow restricting mechanism (throttle valve) for controlling the flow velocity or a wing or fin for controlling the flow direction. When the change in the number of containers 20 to be stored is large or the chemical storage place S is wide, the temperature control at the time of storage of the chemical containers 20 can be performed efficiently and reliably by providing a throttling mechanism or wings or fins for these flows. .

Since the temperature Tb of the outside air G2 is lower than the temperature Ta of the air G1 in the engine room 2, the density ρb of the outside air G2 is larger than the density ρa of the air G1 in the engine room 2, and the outside air G2 is inside the engine room 2. Heavier than the air G1. Therefore, a downward flow is generated only by providing the opening 13 upward, and the outside air G2 can be flowed to the medicine storage place S without providing a special air blowing mechanism. Further, when the opening 13 is on the upper side, it is possible to easily flow the outside air G2 through the entire medicine storage place S. The descending air speed of the outside air G2 at the opening 13 may be about 2 m / s to 10 m / s, and a fan for the chemical storage place S is not particularly required.

The introduced outside air G2 covers the medicine container 20 stored in the medicine storage place S, and then has a storage area 2c where the medicine storage place S is located, that is, the partition wall 2a of the engine room 2 and the air permeability. There is a space partitioned by a partition 2b such as a wire mesh that can be seen from the outside (in the configuration of FIGS. 1 to 3, the engine store provided on the second deck 6) 2c and the like is diffused throughout the engine room 2. It is discharged to the outside of the engine room 2 through the exhaust port.

According to this configuration, even in the engine room 2 where the air exceeds 45 ° C., the outside air introduction configured by providing the branch duct 12 having the opening 13 in the outside air introduction duct 11 provided in the conventional engine room 2. The mechanism 10, which is a very simple and low-cost mechanism, can maintain the temperature Tc of the medicine container 20 placed in the medicine storage place S in the vicinity of the temperature Tb of the outside air G2.

Next, a method for maintaining the temperature of the object according to the embodiment of the present invention will be described. The method for maintaining the temperature of the chemical container 20 described above suppresses heat transfer from the air G1 around the chemical container 20 to the chemical container 20, and maintains the temperature Tc of the chemical container 20 within a preset temperature range Rt. This is a method for maintaining the temperature of the chemical container 20, and the outside air G2 having a temperature Tb different from the temperature Ta of the air G1 and within the temperature range Rt maintained by the chemical container 20 is caused to flow on the surface of the chemical container 20, This is a method of maintaining the temperature of the chemical container 20 by covering the surface of the chemical container 20 with the outside air G2 to suppress heat transfer between the air G1 and the chemical container 20.

Here, the air G1 in the engine room 2 of the ship 1 is the first gas body G1, the outside air G2 introduced from outside the engine room 2 is the temperature maintaining gas body G2, and the ballast water for processing the ballast water of the ship 1 is used. When the chemical container 20 of the chemical used in the processing apparatus is replaced with the target object 20, it is expressed as follows.

In this method for maintaining the temperature of the object 20, the heat transfer from the first gas body G1 around the object 20 to the object 20 is suppressed, and the temperature Tc of the object 20 is set within a preset temperature range Rt. This is a method for maintaining the temperature of the object 20 to be maintained. A temperature maintaining gas body G2 having a temperature Tb different from the temperature Ta of the first gas body G1 and having a temperature Tb within the temperature range Rt maintained by the object 20 is obtained. By flowing over the surface of the object 20 and covering the surface of the object 20 with the temperature maintaining gas body G2, the heat transfer between the first gas body G1 and the object 20 is suppressed, and the object 20 This is a method of maintaining the temperature.

According to this method, since the chemical container 20 is covered with the outside air G2 having the temperature Tb within the temperature range Rt maintained by the chemical container 20, heat transfer between the high-temperature air G1 and the chemical container 20 can be suppressed, and the outside air The temperature Tc of the chemical container 20 can be maintained within a target temperature range Rt to be maintained by heat exchange between the G2 and the chemical container 20.

That is, the temperature Ta of the air G1 in the engine room 2 rises due to heat generated by the operation of the main engine 5 and the auxiliary machinery, and becomes close to 45 ° C. Therefore, since the chemical container 20 placed in the engine room 2 is exposed to air at a temperature close to 45 ° C. as it is, heat exchange is performed with the air G1 in the engine room 2 to a temperature close to the air G1 in the engine room 2. However, by covering the medicine container 20 with the outside air G2, the temperature Tc of the medicine container 20 can be easily maintained in the vicinity of the temperature Tb of the outside air G2.

As a result, the chemical container 20 can be prevented from being warmed by the high-temperature air G1, and the chemical container 20 is simply always covered with the outside air G2, so that a complicated device such as a cooling device is not necessary and is very simple. It is possible to prevent the chemical container 20 from being heated by the apparatus and at a low cost.

This temperature maintaining method is not a method of cooling the medicine L in the medicine container 20 with the outside air G2 by heat exchange or the like, but the air G1 in the engine room 2 having a temperature Ta higher than the temperature Tc of the medicine container 20 is used as the medicine. The heat transfer occurs between the air G1 and the chemical container 20 in direct contact with the container 20 by covering the chemical container 20 with the outside air G2 and using the shielding effect of the outside air G2 having a low thermal conductivity. It is a method to suppress.

Therefore, the temperature Tc of the medicine container 20 becomes higher than the temperature Tb of the outside air G2 at the beginning when the medicine container 20 is transported into the engine room 2 or when the introduction of the outside air G2 is temporarily stopped. Even when the engine room ventilation fan 11a is driven, the outside air G2 is in direct contact with the medicine container 20 in the medicine storage place S. Therefore, even if the amount of the outside air G2 is small, This means that there is always a heat transfer between the outside air G2 and the chemical container 20. As a result, the temperature Tc of the medicine container 20 and the temperature Td of the medicine L gradually become equal to or near the temperature Tb of the outside air G2, and the temperature Td of the medicine L is within the temperature range Rt to be maintained during storage. Can be maintained.

Therefore, the chemical container 20 does not require a cooling fin or the like for promoting cooling, and the shape of the chemical container 20 does not need to be particularly devised, and may be an existing shape. Moreover, since it is not for cooling, the flow rate of the outside air G2 discharged from the opening 13 may be small, and it is not necessary to increase the flow rate of the outside air G2.

According to the temperature maintaining method of the object, the temperature maintaining method of the object in the engine room of the ship, and the ship according to the present invention, the temperature maintaining gas body having a temperature within the target temperature range to be maintained by the object. Since the object is covered, heat transfer between the first gas body having a temperature higher or lower than the temperature of the object and the object can be suppressed, and between the temperature maintaining gas body having a temperature within the target temperature range. Since the temperature of the object can be maintained within the target temperature range by heat exchange, the chemicals used in the ballast water treatment device can be used for ships that store in the engine room.

1 Ship 2 Engine room 2a Partition wall 2b Partition 2c Section (Engine store)
3 Propeller 4 Rudder 5 Main engine 6 Second deck 7 Steering machine room 8 Living area 10 Outside air introduction mechanism 11 Outside air introduction duct 11a Engine room ventilation fan 12 Branch duct 13 Opening 20 Chemical container (target object)
G1 Air in engine room (first gas body)
G2 Outside air (temperature maintenance gas body)
L Chemical Rt Temperature range to be maintained S Chemical storage location (placement location)
Ta Engine room air temperature Tb Outside air temperature Tc Chemical container temperature Td Chemical temperature

Claims

In the method for maintaining a temperature of an object, the temperature of the object is maintained within a preset temperature range by suppressing heat transfer from the first gas body around the object to the object. A temperature maintaining gas body at a temperature different from the temperature of the body and within a temperature range maintained by the object is caused to flow on the surface of the object, and the object is moved by the temperature maintaining gas body. A temperature maintaining method for an object, wherein the temperature of the object is maintained within the temperature range by covering and suppressing heat transfer between the first gas body and the object.
The first gas body is air in an engine room of a ship, and the temperature maintaining gas body is outside air introduced from outside the engine room or air introduced from an area with air conditioning. The method for maintaining a temperature of an object according to claim 1.
The method for maintaining a temperature of an object according to claim 1 or 2, wherein the object is a chemical container containing a chemical used in a ballast water treatment apparatus for treating ballast water of a ship.
Introduced by introducing outside air from outside the engine room or air introduced from an area with air conditioning to an object that maintains the temperature placed in the engine room of the ship within a preset temperature range A method for maintaining the temperature of an object in an engine room of a ship, wherein the temperature of the object is maintained by flowing outside air or air over the surface of the object and covering the surface.
An object placement place for placing a temperature maintenance object in the engine room of the ship, and an outside air introduced from the outside of the engine room on the surface of the object placed at the object placement place, or introduced from an area with air conditioning A ship characterized by having an outside air introduction mechanism for flowing air.
The outside air introduction mechanism branches the outside air from the outside air introduction duct for cooling the engine in the engine room and guides it to the vicinity of the object placement location, and the outside air provided in the branch duct serves as the object. The ship according to claim 5, wherein the ship is configured to include an opening that discharges to an object arrangement place.
The ship according to claim 5 or 6, wherein the object is a chemical used in a ballast water treatment apparatus for treating ballast water of the ship.