SU687726A1 - Cooling system for ship equipment - Google Patents

Description

one

The invention relates to shipbuilding, in particular to ship cooling equipment.

A known system for cooling ship equipment of floating drilling rigs 5 with a platform and submersible bodies, comprising a contour of outboard water, low-temperature and high-temperature contours of fresh water with heat exchangers l

This system has a low reliability of operation in variable modes, large weight and energy consumption in the case of a differentiated intake of cooling water from a reservoir.

The purpose of the invention is to increase the reliability of operation of heat exchangers and cooled equipment in variable modes, reducing the weight of the system and reducing energy consumption. "-20

For this, the system is equipped with additional pumps and a contact heat exchanger installed on the platform and included in additional low-temperature circuits connected to the seawater circuits and main low-temperature circuits, while the seawater contours are located in the lower part of the submersible hulls.

The invention also provides that the pumps are additional low-temp. The supply circuits are installed at the outlet of the contact heat exchanger.

Figure 1 shows a fundamentally functional circuit system; figure 2 - the placement of the contours of the seawater and low-temperature intermediate with a contact heat exchanger.

In the figures, the dashed line shows the contour of the seawater, the solid line shows the intermediate circuit, the dash-and-dash line the BASIC low-temperature contour, and the dashed line the high-temperature contour.

The system consists of a seawater circuit 1 with a pump 2, central surface heat exchangers 3 placed in a submerged body 4, an additional low-temperature loop 5 pipeline with additional pumps 6 connected to central surface heat exchangers 3, with a contact heat exchanger 7 placed on platform 8 and with expansion tank 9.

Claims (2)

The contact heat exchanger 7 is connected to the pipeline 10 of the main bottom of the temperature loop, which includes pumps 11. The pipe 10 is connected to the cooled equipment 12 and to the heat exchangers 13 of the high temperature loop 14. The high temperature loop is included; pumps 15, diesel 16 cooling surfaces, and expansion tank 17. The system works as follows. Outboard water pumped through pipeline 1 by pumps 2 cools in the central surface heat exchanger 3 fresh water of an intermediate low-temperature circuit circulating through pipe 5 between the immersion housings 4 and platform 8 by means of pumps 6 through a central surface heat exchanger 3 and contact heat exchanger 7. From the contact heat exchanger 7 water by pump 11 through pipeline 10 of the main low-temperature circuit is disassembled for cooling equipment 12 and heat exchangers 13 for high-temperature co ntura. Pumps 6 and 11, both of the additional and the main circuits, are supported by a single expansion tank 9 connected to the contact heat exchanger 7. The water in the high-temperature circuit circulates through the pipeline 14 by the pump 15 through the diesel 16 and the heat exchanger 13. The pump 15 is pumped out. tank 17. Due to the placement of the seawater contour in the submersible body 4, recessed by the magnitude of the wave depression (h 18–20 m), the temperature of the intake water decreases, and, accordingly, the dimensions of the central surface heat of the pipeline, as well as the strength of pipeline 1, which is with the least reliable element of the system. The low-temperature contour of the seawater from pargilno-connected elements (according to the number of pumps and heat exchangers) provides a constant water velocity in heat exchangers 3, on which their thermal conductivity depends and is complicated by a low value of D1, which characterizes the temperature difference of fresh and low-temperature fresh water. In addition, it reduces fouling of the heat exchange surface and reduces their erosion. By successively switching on these elements, it is possible to control the amount of water entering the contact heat exchanger, depending on the mode of operation of the equipment being cooled and the temperature of the outboard water. At the same time, the proposed connection of the additional and main circuits through the contact heat exchanger allows the required quantity of heat exchangers water, independent of the water entering the contact heat exchanger from the additional low-temperature circuit, and the choice MAL elements involved contours seawater and fresh water of low temperature is also possible to maintain the temperature in the low temperature circuit substantially at the same level, and also to make a full backup of the central heat exchanger according to the mode table entry is not a double reservation. By connecting an expansion tank to the contact heat exchanger of the expansion tank, all low-temperature circuit pumps are provided for all pumps. The amount of water pressure in front of the cooled equipment and heat exchangers depends only on the pump head and does not depend on the operation of the additional circuit and may be different in accordance with the pressure required for consumers. To ensure optimal pressure on the seals of the additional circuit pumps, the pumps are installed on the platform behind the contact heat exchanger, which also reduces the strength requirement of the central heat exchangers due to the pressure loss in the downward branch of the pipelines. Claim 1. Cooling system of shipboard fitting of floating drilling rigs with platform and submersible hulls, containing outboard water contours, low-temperature and high-temperature fresh water contours with heat exchangers, which, in order to increase the reliability of heat exchangers and coolant. variable modes, reducing the weight of the system and reducing energy consumption, it is equipped with additional pumps and contact heat exchanger mounted on the platform included in the additional low temperature circuits are connected with the contours of the seawater and the main low-temperature circuits, wherein the circuits 3abortno water placed in the bottom of submersible hulls. 2. The system according to n.f-, about tl and ch and y and the fact that the pumps of additional low-temperature circuits are installed at the outlet of the heat exchanger. Sources of information taken into account in the examination. 1. Patent GDR 106938, cl. 65, 1974 (prototype). Is. 7 X / 5 L, / - I gf. Cl - .. J-Jii I I - ill g / g / s uh 7 V X ttf 6 8 s 7 Figg