SU1708692A2 - System for cooling marine engines - Google Patents

Abstract

This invention relates to shipbuilding. The purpose of the invention is to improve engine performance. Channels 8 and 9 between heat transfer 4 and 5 and heat absorbing 6 and 7 sections of heat exchanger 1 are provided with pipelines 23 and 24. And the outlet openings in these channels are made with coamings placed in the cavities of the said channels. 1 il.

Description

00

oh oh

about

This invention relates to shipbuilding.

A ship engine cooling system is known, comprising a skin heat exchanger comprising two compartments and connected by pipe to the engine to be cooled. Each compartment is divided by partitions into tee-transmitting and heat-receiving sections.

A disadvantage of the known system lies in the low performance characteristics of the engines.

To improve engine performance, it has been proposed in each heat exchanging section to perform a channel, one of the walls of which is combined with a compartment partition wall, with the pump pressure pipe connected to this channel, and the channel outlet communicating with the heat receiving section. However, practice has shown that, at partial loads of a crane engine operating in a closed circuit, to the heat supply section, free contact of water from the heat-receiving section through the partition with the heat-generating section is undesirable, as a result, the temperature rises there, and this in turn It degrades the characteristics of engines, in particular, which take cooling water from the heat-receiving section.

The purpose of the invention is to improve the performance of the diggers,

This is achieved by the fact that the proposed system is supplied with a source of compressed air, connected by a pipeline with channels, and the outlet openings of the channels are made with coamings located inside them.

The drawing shows a schematic diagram of the proposed system.

The system includes a cladding heat exchanger 1 (made of compartments, each of which is divided by heat partitions 4 and 5 and partitions 6 and 7 sections by partitions 2 and 3). In sections 6 and 7, channels 8 and 9 are made, one of which walls combined with partitions 2 and 3; the outlets 10 and 11 of the channels are connected to sections 6 and 7. Sections 4 and

5 are first connected by the suction pipe 12 to the pump 13 of the engine 14, and then to the pressure pipe 15. Sections

6 and 7 are first connected by the suction pipe 16 to the pump 17 of the Motors 18. and then the pressure pipe 19. In addition, sections 6 and 7 are interconnected by pipes 20 and 21, of which the pressure pipes are connected to the inlet of the channels. Piping 20 and 21 are connected to pump 22, K

channels 8 and 9 are connected pipelines 23 and 24 with valves 25 and 26, 27 and 28, communicated with a source of compressed air. Around the holes 10 and 11 are mounted inside

Channel coams 29 and 30. Sections 6 and 7 from the sides are limited to the outer skin.

Consider the operation of the cooling system of ship engines on the example of a floating crane, in which the digester 14 operates in a crane mode, and the motors 18 provide a running mode.

When carrying out crane operations, when the load on the ship power plant

5 does not exceed 8-35% (partial load), the engine 14 is put into operation. Its cooling is provided by the circulation of water through the pump 13 through one or several heat-generating sections 4 and 5. When

U specified partial loads to remove heat enough surface heat transfer sections 4 and 5 to combine with the outer skin. There is no need to remove heat to the heat-receiving sections 6 and 7,

5 To eliminate this heat sink, valves 26 and 27 are closed, and from channels 8 and 9 water is displaced by compressed air entering through valves 25 and 28 through air ducts 23 and 24 under pressure,

0 determined by the static pressure of water in sections 6 and 7, In channels 8 and 9, an air insulating layer is formed with a layer thickness equal to the height of coamings 29 and 30, which prevents

5, heat removal in sections 6 and 7. Now almost all the heat is removed through the outer skin. At the same time, the water temperature is kept low in sections 6 and 7.

At full loads, usually having a short-term (peak) character, it is possible to additionally turn on the motors 18. The need to refuse to take overboard, for example heavily polluted, water may cause the operation of the motors 18 on sections 6 and 7 filled with water. Water from sections 6 and 7 is fed through suction lines, 16 by pump 17 to engine 18 and discharged through pressure line 19 back to section

0: b and 7. Since the water temperature is kept low in these sections, an increase in the operating time of the engines 18 in a closed cycle without receiving seawater is provided.

5 In the case of a high temperature of the seawater and the need for additional heat dissipation in section 6 and 7, valves 26 and 27 are opened (valves 23 and 28 are closed), the air insulating layer in the canal 51708692 6

Claims (1)

lakh 8 and 9 is vented to the atmosphere and the formula of the invention transfer pumps 22 are being installed. Water Cooling systems for marine engines Sections VI 7 is pumped through the pipeline by bus. St. No. 1188048, different from Ladies 20 and 21 and run through channels 8 and 9, in order to increase the operational performance along partitions 2 and 3. At the same time, the heat characteristics of the engines are Cooling water is supplied by a compressed air source by convection, which is made with a pipework with channels, and the weekend, it intensifies heat transfer. The channels are made with coamings located inside them.