JPS6231679B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marine hot water heating device that heats hot water using exhaust heat after cooling a main engine mounted on a marine vessel and circulates the heated water 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 part of the scavenging air cooler attached to the main engine, and for the cooling part of the engine oil heater, accommodation space 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 heat is required to reheat the boiler, which not only increases fuel costs but also takes time to raise the temperature. Ta.

The present invention has been made in view of the above points, and includes a system in which the cooling section of a main engine for a ship and heated equipment inside the ship are connected by piping, and hot water heated in the cooling section is circulated within the piping. In addition to heating the equipment to be heated, a heat storage device is installed to store the energy discharged from the onboard equipment, and when the temperature of the circulating hot water decreases due to a change in the output of the main engine, the temperature is raised using the stored heat. The present invention provides a marine hot water heating device that does not require reheating of a boiler, averages waste heat generated in a short period of time, makes effective use of it, and can immediately respond to a temperature drop. Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic configuration diagram of a marine hot water heating device according to the present invention, in which a main engine 1 mounted on a ship is provided with a scavenging air cooler 4 consisting of a fresh water cooling section 2 and a seawater cooling section 3. , low-temperature seawater is guided and circulated in the seawater cooling section 3. On the other hand, an absorption refrigerator 6 as a heated device 5, an oil heater 7 in the engine room, a living space heating device 8, etc. are installed in the ship, and the space between these and the fresh water cooling section 2 is as follows. They are connected by a pipe 9 that reciprocates between the two,
A hot water circulation pump 10 is provided in the pipe 9 to circulate fresh water, which is cooled by seawater, cools the main engine 1, and is warmed to become hot water, within the pipe 9.

11 is a heat storage device, and inside the closed container,
A heating coil 12 and a heat extraction coil 13 are arranged facing each other. Heating coil 12 of these
The pump 16 is connected between the heat exchanger 15 installed in the exhaust heat section of the diesel power generation engine 14 installed in the general public.
The exhaust heat is exchanged with heat and light, and the thermal energy of the circulating high temperature pressure water is stored.

The heat extraction coil 13 is provided in a bypass of the piping 9, and a connecting portion thereof detects when the hot water temperature in the piping 9 falls below the set temperature, and the hot water passes through the coil 13 side. A temperature control valve 17 for switching the path is provided.

In the hot water heating device configured as described above, the fresh water sent by the pump 10 to the fresh water cooling unit 2 provided in the scavenging air cooler 4 of the main engine 1 is raised by cooling the main engine 1. Since the heating device 5 is heated when it passes through the heated device 5, it is possible to save on heating costs such as a boiler that serves as a heat source for the heated device 5 such as the heating device 8. When the output of the main engine 1 decreases, its temperature decreases, and the amount of heat that the hot water in the piping 9 receives from the scavenging air cooler 4 decreases, so the temperature of the hot water decreases. The temperature control valve 17 detects this temperature drop and switches the pipe line to the bypass side, so that the hot water passes through the heat extraction coil 13 in the heat storage device 11 and heads toward the heated device 5. Inside the heat storage device 11, there is provided a heating coil 12 connected to a heat exchanger 15 of a diesel power generation engine 14 installed in the ship, or a pressure water takeout/return coil. Since the thermal energy of water is converted into heat and stored, the hot water passing through the heat storage device 11 is heated and raised to a predetermined temperature. Therefore, the temperature of the hot water heating the heated device 5 is prevented from decreasing, and the function of the heated device 5 can be maintained without requiring additional heating of the boiler. When the output of the main engine 1 increases and the temperature of the hot water in the piping 9 increases, the temperature control valve 17
Since the pipe is switched, the hot water does not pass through the heat storage device 11, but instead goes to the heated device 5 and continues to heat it.

FIG. 2 shows a schematic configuration diagram of another embodiment of the present invention. In this embodiment, the heating coil 12 is connected to a heat exchanger 15A provided in the exhaust heat section of a waste oil incinerator 14A provided in the ship. This embodiment is the same as the previous embodiment except that the two are connected via a pump 16. By doing so, in the heat storage device 11, the high temperature pressure water or the thermal energy of the pressure water that is circulated through heat and light exchange with the exhaust heat of the waste oil incinerator 14A is stored.
Other effects are the same as in the previous embodiment.

Note that the thermal energy stored in the heat storage device 11 is not limited to the thermal energy shown in the embodiment described above, but may be any thermal energy as long as it is the exhaust thermal energy of the onboard equipment.

As is clear from the above description, according to the present invention, the cooling section of the main engine mounted on a ship and the equipment to be heated inside the ship are connected by piping, and hot water heated in the cooling section is passed through the piping. In addition to circulating the heat to heat the heated equipment, a heat storage device is installed to store the energy discharged from the ship's equipment, so that when the temperature of the circulating hot water drops due to a change in the output of the main engine, the temperature can be raised using the stored heat. With this configuration, there is no need to reheat the boiler, thereby reducing fuel costs, and the surplus steam and exhaust heat during the voyage can be effectively used, resulting in an improved energy saving effect. Furthermore, since the heat source generated in a short time can be averaged by accumulation and used immediately, it is possible to respond immediately to a drop in the temperature of the heated device, and the function of the heated device is not degraded.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a marine hot water heating device according to the present invention, and FIG. 2 is a schematic configuration diagram showing another embodiment of the present invention. 1...Main engine, 4...Scavenging air cooler, 5...Heated equipment, 9...Piping, 11...Regenerator, 14...
Diesel power generation engine, 14A...Waste oil incinerator, 1
5, 15A... Heat exchanger, 17... Temperature control valve.

Claims (1)

[Scope of Claims] 1. A hot water circulation piping connects the cooling section of a main engine of a ship and heated equipment inside the ship, and a heat storage device for storing heat energy discharged from the equipment on the ship is connected to the hot water circulation piping. A marine hot water heating device characterized by being installed in a bypass that can be selectively switched. 2. The marine hot water heating device according to claim 1, characterized in that the thermal energy stored in the heat storage device is the pressure water that has been heat exchanged with the exhaust gas of the inboard diesel power generation engine, or the thermal energy possessed by the pressure water. . 3. The marine hot water heating device according to claim 1, characterized in that the thermal energy stored in the heat storage device is the pressure water that has been heat exchanged with the exhaust heat of the onboard waste oil incinerator, or the thermal energy possessed by the pressure water. .