JPS6231680B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marine hot water heating device that heats hot water and circulates it using exhaust heat after cooling a main engine mounted on a marine vessel to heat equipment to be heated.

In recent years, this type of heating device, which has been widely adopted as part of energy-saving measures on ships, is used for the clean water cooling section of the scavenging air cooler attached to the main engine, and for the cooling section of the engine oil heater, accommodation area heating system, etc. Clean water is circulated between the heating equipment and when it passes through the clean water cooling section, it is heated by the exhaust heat of the scavenging air cooler to turn it into high-temperature water that is guided to the heated equipment and used for heating. It is.

However, in this type of heating device, the temperature of the heating fresh water often decreases due to changes in the amount of heat due to the decrease in the output of the main engine, which often reduces the functionality of the heated equipment. A type heater is installed to ensure a predetermined temperature, but in this case additional fuel is required to reheat the boiler, which not only increases fuel costs but also takes time to raise the temperature.

The present invention has been made in view of the above points, and is designed to supply pressurized water heated by the exhaust heat of the ship's equipment inside the hot water circulation piping that heats the ship's heated equipment and a selectively switchable bypass. A heat storage device is installed inside the heat storage device, and a heating coil is installed in the heat storage device through which a heat source heated by the exhaust heat from the onboard equipment circulates.
By connecting the pressure water and the heat exhaust part of the ship's equipment with piping equipped with a valve that opens and closes by detecting the pressure of the pressure water, heat can be stored when the temperature of the hot water drops due to changes in the output of the main engine. The structure is such that the heat stored in the vessel is taken out by a heat extraction coil to raise the temperature of hot water, and the pressure drop in the heat storage unit is detected to supply thermal energy from the heat exhaust part of the ship's equipment to the heat storage unit. Equipped with a heat storage function that effectively uses waste heat from equipment and a function to raise the temperature of circulating hot water using this heat storage, it is possible to reduce the amount of fuel consumed for heating and reduce the amount of fuel consumed intermittently in a small capacity ship. The present invention provides an inboard hot water heating device that makes effective use of equipment exhaust heat. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

The figure shows an embodiment of the marine hot water heating device according to the present invention. (not shown) and a fresh water cooling section 2 are provided. On the other hand, inside the ship, an engine room oil heater 4 and a living area heating system 5 are installed as heated equipment 3, and between these and the fresh water cooling section 2, there is a pipe 6 that reciprocates between the two. A hot water circulation pump 7 is provided in the piping 6 to cool the main engine and circulate warm water within the piping 6.

8 is a heat storage device, in which pressure water 9 as a heat storage medium is stored in its closed container;
A heating coil 10 and a heat extraction coil 11 are provided facing each other. Heating coil 10 of these
Although not shown, is connected to shipboard steam generation equipment such as a boiler drum through a pipe 12, and a dump valve 13 that opens when surplus steam is generated inside the ship is disposed within the pipe 12. . The heat extraction col 11 is connected to the piping 6, and has a connecting part that detects when the temperature of the hot water in the piping 6 falls below a set temperature and routes the hot water so that it passes through the coil 11 side. A temperature control valve 14 for switching is provided. Furthermore, in the pipe 12, a pressure regulating valve 1 is connected to the heat storage device 8 through a signal pipe 15 that transmits a pressure signal and detects the pressure of the pressure water 9 inside the heat storage device.
6 is provided, and is configured to open and automatically supply heating steam when the heat storage device 8 releases heat and its internal pressure drops below a certain value.

17 is an auxiliary diesel engine as onboard equipment, and 18 is also a waste oil combustion furnace.The heat exchangers 19 and 20 are respectively installed in the exhaust heat section of these, and each heat exchanger 19, 20 and a heat storage 8
A pair of switching valves 2 that can be opened and closed are connected to the pressure water inside.
1 and 22, respectively, and a pump 25 for circulating pressurized water 9 within these pipes 23 and 24 is provided.

In the hot water heating device configured as described above, the temperature of the fresh water sent by the pump 7 to the fresh water cooling unit 2 provided in the scavenging air cooler 1 of the main engine is raised by cooling the main engine. , heated equipment 3
Since this is heated when passing through, it is possible to save fuel costs for boilers and the like that serve as heat sources for heated devices 3 such as these heating devices 5. and,
When the output of the main engine decreases, its temperature decreases, and the amount of heat that the hot water in the piping 6 receives from the scavenging air cooler 4 decreases, so the temperature of the hot water decreases. The temperature control valve 14 detects this temperature drop and switches the pipe line, so that the hot water passes through the heat extraction coil 11 in the heat storage device 8 and heads toward the heated device 3. Inside the heat storage device 8,
Pressure water 9 is stored, and when the switching valves 21 and 22 are opened and the pump 25 is started, the pressure water 9 is circulated through the pipes 23 and 24, and heat is generated between the auxiliary diesel engine 17 and the waste oil combustion furnace 18. exchanger 1
A heating coil 10 which is directly heated by coils 9 and 20 and connected to a heat exhaust section such as a boiler by a pipe 12.
It is indirectly heated by the thermal energy inside. Therefore, the hot water passing through the heat extraction coil 11 is heated and rises to a predetermined temperature, and it is possible to prevent a drop in the temperature of the hot water that was heating the heated device 3, thereby making it necessary to reheat the boiler, etc. Without this, the function of the heated device 3 can be maintained. Furthermore, when the pressure of the pressure water 9 decreases due to the use of heat storage, the pressure regulating valve 16 detects this and opens, supplying heating steam to the piping 12, so the temperature of the pressure water 9 is raised and a predetermined pressure is maintained. . Then, when the output of the main engine increases and the temperature of the hot water in the pipe 6 rises, the temperature control valve 14 switches the pipe, so the hot water goes to the heated equipment 3 without passing through the heat storage device 8, and heats it. continue.

As is clear from the above description, according to the present invention, in a marine hot water heating device, heating is performed using exhaust heat from the onboard equipment in a bypass that can be selectively switched to hot water circulation piping that heats onboard equipment to be heated. A heat storage device is installed inside which stores pressurized water, and a heating coil is installed inside this heat storage device, through which a heat source heated by the exhaust heat of the ship's equipment circulates. A pressure regulating valve is installed, and when the circulating hot water used to heat the heated equipment decreases due to a change in the output of the main engine, the heat stored in the heat storage device is taken out by a heat extraction coil to raise the temperature of the hot water. By detecting the pressure drop in the boiler and supplying thermal energy from the boiler to the heat storage device, there is no need to install a separate hot water heater to raise the temperature of the circulating hot water, and the boiler can be heated more efficiently. This reduces the need for heating, and makes it possible to effectively use the waste heat of the ship's equipment to raise the temperature, resulting in a significant reduction in fuel costs. It can be averaged and used by
It is possible to cope with a decrease in the temperature of the heated device, and the function of the heated device can be ensured.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram of a marine hot water heating device according to the present invention. 1...Scavenging air cooler, 3...Heated equipment, 6...
Piping, 8... Heat storage device, 9... Pressure water, 10... Heating coil, 11... Heat extraction coil, 12... Piping, 13... Dump valve, 14... Temperature control valve, 1
5...Signal piping, 16...Pressure control valve, 21,2
2...Switching valve, 23, 24...Piping, 25...
…pump.

Claims (1)

[Claims] 1 Hot water for heating the equipment to be heated inside the ship is heated by being circulated between the heat exhaust part of the ship equipment and a bypass that is branched from the circulating piping and equipped with a valve that opens and closes by detecting the temperature of the hot water. A heat storage device storing pressure water inside is provided, and the heat storage device and the heat exhaust section of the ship's equipment are connected by piping equipped with a valve that detects the pressure of the pressure water and opens and closes, and the exhaust heat of the ship's equipment is connected. A marine hot water heating device characterized in that a heating coil through which a heat source heated by heat circulates is provided in the heat storage device.