KR20040040287A - Cooling system for the hold of a container ship - Google Patents

Abstract

PURPOSE: A cooling system for a freight compartment of a container ship is provided to increase the transportation capacity of a cooling container and to improve a total condition control for the freight compartment. CONSTITUTION: A cooling system(1) for a freight compartment of a container ship has a cooling mechanism. The cooling mechanism is received in a separate space and operated by a cooling compressor(2). Cooling air is supplied into the freight compartment of the container ship by the cooling mechanism to keep the proper temperature around a condenser(11) of the cooling container. The cooling system is received in a container. The cooling system has an automation and control unit. The condition and temperature of the freight compartment are controlled by a bridge and steam pipe control room. The cooling system comprises a fan(3) for sending the cooling air into the condenser of the cooling container along a duct system(4) and a cooling radiator(5) for passing the coolant cooled by the cooling compressor and circulated by a coolant pump(6).

Description

COOLING SYSTEM FOR THE HOLD OF A CONTAINER SHIP}

The present invention relates to a cooling system for a cargo compartment of a container ship.

The system is for cooling cargo compartments of container ships carrying frozen food containers. The food container is provided with an intra-container refrigeration system, which has a condenser outside the container. The condenser generates heat in the cargo compartment, and the generated heat and its ventilation limit the number of containers accommodated in the cargo compartment.

One solution that has long been applied and is now widely applied is to vent a cargo compartment into the atmosphere by means of a fan installed on the deck above the cargo compartment and communicating with the cargo compartment below. In warm areas, this solution is very bulky and leads to uneconomical airflow.

The solution of the prior art in this aspect has the following drawbacks.

In warm areas, the cooling effect achieved by atmospheric ventilation air is very small due to small temperature differences, ie it is very difficult to vent heat transferred from the container from the cargo compartment. The temperature of the cargo compartment should not rise above 45 ° C, and exceeding this temperature will significantly impair the freezing capacity of the container and damage foods loaded with cargo. As a result of this, the cargo compartments have a low transport capacity for refrigerated containers. The air volume in ships carrying refrigerated containers increased as allowed by the deck facility, which increased the cost of the deck superstructure and even increased the length of the ship's hull structure.

It is an object of the present invention to eliminate such drawbacks.

1 is a view schematically showing a cooling system of the present invention.

<Description of the symbols for the main parts of the drawings>

1: cooling system

2: refrigeration compressor

3: fan

4: inlet duct system

5: cooling radiator

6: coolant pump

7: seawater condensate pump

8: return air duct

9: cooling water piping system

10: piping

11: condenser

12: evaporator

In the cooling system of the present invention, the cooling system includes a cooling mechanism, which is housed in its own separate space and operated by a refrigeration compressor, whereby the condenser of the refrigerated container loaded with cargo in the cargo compartment of the container ship. It is characterized in that the cooling air is supplied to maintain a proper ambient temperature around.

Various embodiments of the invention are set forth in the dependent claims of the appended claims.

The basic idea of the present invention is to mount a shipping container in a cargo compartment having a refrigeration plant and a fan capable of blowing cooling air along an air duct to a condenser of a refrigerated container loaded with cargo. Cooling air cools the condenser to maintain the temperature of the cargo compartment at a maximum image of 45 ° C. The cargo compartment is watertightly sealed by a cargo hatch on the deck, thereby constituting an ideally enclosed compartment. The air blown into the condenser is warmed in the condenser, returned to the cooling container via the recirculating air opening to act as recirculating air, cooled again and blown to the condenser in the cargo compartment.

Only a small amount of air is exchanged in the cargo compartment by fans equipped with frequency converters.

Automation of the cooling container can be used to manage the condition of the cargo compartment in bridges and engine control rooms and to monitor the temperature of the containers being transported as cargo.

The advantages obtained in the solution of the present invention are as follows.

-The transport capacity for refrigerated containers in the cargo compartment is substantially increased.

-Control of the condition in the cargo compartment is improved and the corruption of the cargo is prevented by automated efficient management of the status of the cargo compartment.

-The problem of moisture in the cargo compartment is reduced.

The quality of the shipment is maintained by controlled conditions.

The overall length of the ship is reduced and the space required for the fans no longer needs to be considered for the use of cargo space.

-The power consumed by the ship is reduced.

-The space of deck pans can be used to transport deck cargo containers.

The invention will now be described by way of example with reference to the accompanying drawings, in which a cooling system of the invention is schematically shown.

The cooling container consists of a standardized 20 or 40 foot long container. This container houses a refrigeration compressor 2 equipped with a seawater condensation pump 7. Piping 10 extends to the seawater tank. The refrigeration compressor is provided with a condenser 11 and an evaporator 12. Cooling water cooled by the refrigeration compressor is circulated through the cooling radiator (5) by the cooling water pump (6).

The coolant cools the air circulating from the cargo space via return air duct 8, which is blown back by the fan 3 to the condenser of the cargo container along the inlet duct system 4.

Inside the container 1, the cooling water piping system 9, the seawater condensation piping system, and the piping system attachment mechanism are attached. The container also houses any actuator or starting device required by the pump, refrigeration compressor and fan.

Work places for system control facilities are provided on the bridge and in the control room (ECR). The working place and the container are interconnected by a bus.

The 20 foot long containers used as cooling containers are placed on top of each other so that the lowermost container is provided with a refrigeration system and the uppermost container is equipped with a fan and a cooling radiator.

The cooling container may also include 40 feet of container and 20 feet of container in various combinations depending on the size of the cargo compartment.

The refrigeration plant can also be taken outside of the container and placed outside the cargo compartment in a space provided in a separate system.

In the cargo ship cooling system of the container ship according to the present invention, the transport capacity of the refrigerated container in the cargo compartment is substantially increased, the overall condition control in the cargo compartment is improved, and the corruption of the cargo is used for the automated effective management of the condition of the cargo compartment. Is prevented by In addition, the overall length of the ship is reduced, and the space required for the fans no longer needs to be considered for the use of cargo space.

Claims (5)

In the cargo ship cooling system of a container ship, The cooling system comprises a cooling mechanism, which is housed in its own separate space 1 and operated by a refrigeration compressor 2, by which the refrigeration container is loaded with cargo in the cargo compartment of the container ship. Cooling system, characterized in that the cooling air (4) is supplied around the condenser of the supply to maintain an appropriate ambient temperature. Cooling system according to claim 1, characterized in that the cooling system (1) is housed in a container. The cooling system according to claim 1 or 2, wherein the cooling system comprises an automation and control unit, whereby the condition and temperature of the cargo compartment can be controlled from the ship's bridge and the engine control room. The cooling system according to any one of the preceding claims, wherein the cooling system comprises a fan (3) for blowing cooling air along the duct system (4) to the condenser of the cooling container, and the cooling water cooled by the refrigeration compressor (2). And a cooling radiator (5) circulated and passed by (6). Cooling system according to one of the preceding claims, characterized in that the cooling compressor (2) is provided with a sea water condensation pump (7) or an air condenser.