KR20100058298A - Multi engine waste heat recovery appratus for ship and method thereof - Google Patents

Abstract

PURPOSE: Waste heat collecting apparatus and method for a ship are provided to efficiently use the discarded waste heat by collecting the waste heat of the exhaust gas produced from a plurality of organs for a ship and recycling it as the heat source of high temperature and low temperature. CONSTITUTION: A waste heat collecting apparatus for a ship comprises the coils of 1, 2, 3 steps, a high-pressure boiler(400), high-pressure supply pipes(402), high-pressure collecting pipes(404), a high-pressure discharge pipe(406) and a low-pressure boiler(500). The coils of 1, 2, 3 steps are wound and installed toward the upper end from the lower end of each economizer(200, 202, 204, 206, 208) at intervals. The high-pressure boiler produces the steam of a high heat source. In order to supply the water from the water tank of the high-pressure boiler to the coil of 2 steps, the high-pressure supply pipes are connected in parallel to each other. In order to return the water heat-exchanged through the coil of 2 steps to the high-pressure boiler, the high-pressure collecting pipes connect the coil of 2 steps and the high-pressure boiler in parallel. The high-pressure discharge pipe heats the steam vaporized at a high temperature through the high-pressure boiler, via the coil of 1 step again to connect to a steam turbine. The low-pressure boiler produces the steam of a low heat source.

Description

Marine manifold waste heat recovery system and its method {MULTI ENGINE WASTE HEAT RECOVERY APPRATUS FOR SHIP AND METHOD THEREOF}

The present invention relates to a marine manifold waste heat recovery apparatus and a method thereof, and more particularly, to recover the waste heat of the exhaust gas generated from the marine manifold independently, to be recovered in one or two cycles to be recycled to heat sources of both high and low temperatures. The present invention relates to an improved marine manifold waste heat recovery apparatus and a method thereof.

With the advent of high oil prices, there is a growing interest in systems that will increase the efficiency of ship propulsion and save overall energy.

However, in the operation of ships, most of the energy is consumed by the propulsion main engine, and 25% of the fuel required for the operation of the main engine is disposed of in the atmosphere as waste gas.

In recent years, various systems for recovering a part of waste heat by using such waste gas are actively introduced.

Among them, a system that generates electricity by operating a turbine by bypassing a part of the waste gas generated from the main engine from a turbo charger has been widely studied because of its simple configuration and installation. .

For example, Figure 1 shows the waste heat recovery configuration of the vessel according to the prior art.

As shown in FIG. 1, waste heat is exchanged in the middle of the year 10 of the main engine (main engine) E1 which generates the most exhaust gas among the plurality of engines E1, E2, E3, and E4 installed on the ship. By installing an economizer 20 capable of generating steam, and using the waste heat recovered through the economizer 20 as a heat source for operating various equipment, such as a heater, through the boiler 30; Recycling was the form of most conventional waste heat recovery.

By the way, in the case of recycling only for the heating through the boiler 30, it is enough to recover the waste heat of the structure described above, but the use of more efficient waste heat because there is a lot of equipment that requires a heat source in the vessel, as well as the trend of larger vessels For this purpose, the capacity is very insufficient, and most of all, the waste heat generated from the unused engines (E2, E3, E4) is being discarded as it is, which is very inefficient in terms of efficient recycling of resources.

In other words, the ship's energy consumption was increased.

The present invention has been made in view of the above-mentioned problems in the prior art, and has been created to solve this problem. However, it is possible to recover the waste heat generated from the exhaust gas generated in the ship manifold and configure a separate closed circuit to be utilized as a high and low temperature heat source. The main problem is to provide a marine manifold waste heat recovery apparatus and method which can contribute to the energy saving of the vessel by recovering more efficiently.

The present invention is a means for achieving the above-described problems, by using a plurality of engines provided in the ship, the year connected to each of the engines, and the use of a cutting machine installed respectively in the middle of the length of the waste heat generated from the engines A device for recovering; 1,2 and 3-stage coils, wound at intervals from the lower end to the upper end of each of the above-described cutters; A high pressure boiler for steam production of a high heat source; A plurality of high pressure supply pipes connected in parallel to each other to supply water in the water tank of the high pressure boiler to the second stage coil; A plurality of high-pressure recovery pipes connected in parallel with each other to connect the two-stage coil and the high-pressure boiler to return the heat-exchanged water through the two-stage coil to the high-pressure boiler; A high pressure discharge pipe for reheating the steam vaporized at high temperature through the high pressure boiler and passing through the first stage coil to a steam turbine; Low pressure boiler for steam production of low heat source; It comprises a low pressure supply pipe, a low pressure recovery pipe, a low pressure discharge pipe for connecting the water in the water tank of the low pressure boiler with the three-stage coil to recover after heat exchange, vaporized recovered low temperature water to discharge to the required place It provides a marine manifold waste heat recovery apparatus characterized in that.

At this time, the high pressure discharge pipe is characterized in that the branch pipe having a separate on-off valve further connected.

In addition, the steam of the high heat source generated through the high pressure boiler is pressure 6 ~ 12kg / ㎠, temperature 150 ~ 300 ℃, the steam of the low heat source generated through the low pressure boiler is pressure 3 ~ 6kg / ㎠, temperature 140 ~ It is also characteristic that it is 170 degreeC.

The present invention is another means for achieving the above object, the waste heat generated from the engine by using a plurality of engines provided in the vessel, the year connected to each of the engine and the cutting machine installed respectively in the middle of the length In the apparatus for recovering; 1,2 and 3-stage coils, wound at intervals from the lower end to the upper end of each of the above-described cutters; A high pressure boiler for steam production of a high heat source; A plurality of high pressure supply pipes connected in parallel to each other to supply water in the water tank of the high pressure boiler to the second stage coil; A plurality of high pressure recovery pipes connected between the first stage coil and the high pressure boiler so as to sequentially transfer the heat-exchanged water through the second stage coil to the first stage coil and return to the high pressure boiler; A high pressure discharge pipe for directly connecting the high temperature steamed steam to the steam turbine via the high pressure boiler; Low pressure boiler for steam production of low heat source; It is configured to include a low pressure supply pipe, a low pressure recovery pipe, a low pressure discharge pipe for connecting the water in the water tank of the low pressure boiler with the three-stage coil to recover after heat exchange, and vaporized the recovered low temperature water to discharge to the required place It provides a marine manifold waste heat recovery device characterized in that.

In addition, the present invention is another means for achieving the above problems, by using a plurality of engines provided in the ship, the year connected to each of the engines, respectively, and using a cutting machine installed in the middle of the length of the An apparatus for recovering waste heat generated from an engine; A first and second stage coils wound at intervals from the lower end to the upper end of each of the above mills; A high pressure boiler for steam production of a high heat source; A high pressure supply tube, a high pressure recovery tube, and a high pressure discharge tube for connecting the water in the high pressure boiler to the first stage coil to recover the heat exchange and recovering the recovered high temperature water into a steam turbine; Low pressure boiler for steam production of low heat source; It comprises a low pressure supply pipe, a low pressure recovery pipe, a low pressure discharge pipe for connecting the water in the water tank of the low pressure boiler with the two-stage coil to recover after heat exchange, and vaporized the recovered low temperature water to discharge to the required place A ship manifold waste heat recovery device may be provided.

In this case, the one-stage coil is also characterized by having a winding length 2-3 times longer than the two-stage coil.

In addition, the present invention is another means for achieving the above problems, a plurality of engines provided in the ship, the year connected to each of the engines, the mills respectively installed in the middle of the length, the heat exchanged water A method for recovering the waste heat generated from the engine comprising a high pressure boiler and a low pressure boiler to vaporize; Supplying water in the water bottle of the high pressure boiler to the stop of the coal mill and preheating the water to recover the high pressure boiler; Vaporizing the water preheated through the recovery process in the high pressure boiler; Supplying steam vaporized through the steaming process to the bottom of the coal mill again and reheating it with hot steam having a pressure of 6 to 12 kg / cm 2 and a temperature of 150 to 300 ° C .; Supplying hot steam obtained in the reheating process to a steam turbine; It is characterized in that it comprises a step of supplying the water in the water tank of the low pressure boiler to the upper end of the pelletizer, the low-temperature heat exchange, and then recovering back to the low pressure boiler, vaporizing the recovered low temperature water and supplying it to the required place. A ship manifold waste heat recovery method can be provided.

Furthermore, the present invention is another means for achieving the above-described problems, a plurality of engines provided in the ship, the year connected to each of the engines, the mills respectively installed in the middle of the length, the heat exchanged water A method for recovering the waste heat generated from the engine comprising a high pressure boiler and a low pressure boiler to vaporize; Supplying water in the water bottle of the high pressure boiler to the stopper of the coal mill and preheating it, and then supplying it to the bottom to heat exchange with hot water and recovering the high pressure boiler; Vaporizing hot water obtained through the recovery process in the high pressure boiler; Supplying hot steam having a pressure of 6 to 12 kg / cm 2 and a temperature of 150 to 300 ° C. through the vaporization process to a steam turbine; It is characterized in that it comprises a step of supplying the water in the water tank of the low pressure boiler to the upper end of the pelletizer, the low-temperature heat exchange, and then recovering back to the low pressure boiler, vaporizing the recovered low temperature water and supplying it to the required place. A ship manifold waste heat recovery method can be provided.

According to the present invention, it is possible to efficiently use the waste heat that is discarded by recovering most of the waste heat of the exhaust gas generated in the ship manifold and recycling it as a heat source of high and low temperatures, thereby achieving the effect of energy saving.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Figure 2 is a block diagram showing an example of a marine manifold waste heat recovery apparatus according to the present invention, Figures 3 and 4 is a block diagram showing another example of a marine manifold waste heat recovery apparatus according to the present invention.

As shown in Figure 2, the marine manifold waste heat recovery apparatus according to the present invention, the engine crusher (100, 102, 104, 106, 108) in each engine (100, 102, 104, 106, 108) to recover the waste heat of all the exhaust gas generated in the manifold (MULTI ENGINE) (100, 102, 104, 106, 108) ECONOMIZER) (200, 202, 204, 206, 208) are independently installed so as to recover all the waste heat discarded.

At this time, the mills 200, 202, 204, 206, 208 are installed in each year (300, 302, 304, 306, 308) connected to the engine (100, 102, 104, 106, 108).

In addition, a loop (pipe circuit) is installed in the coal mill 200, 202, 204, 206, 208 to recover the waste heat from the lower side of the engine 100, 102, 104, 106, 108, that is, from the lower end of the coal mill 200, 202, 204, 206, 208 to the 1,2,3 stage coil. do.

Thus, the waste heat extracted from the first and second stage coils of the loop is used as a high heat source (about 6% of engine generated energy), and the waste heat extracted from the third stage coils is used as a low heat source. It can be utilized more efficiently.

Here, a steam turbine type generator (STEAM TURBINE GENERATOR) may be exemplified as a facility requiring a high heat source in a ship, and a heater, which is a heat exchanger for heating, may be exemplified as a facility requiring a low heat source.

At this time, in order to rotate the steam turbine-type generator is connected to the steam turbine 410 and the steam turbine 410 is rotated by the high-temperature steam generated in the water tank of the high-pressure boiler 400 and linked with Generator 420 for generating electricity.

And, in the case of a boiler for making the steam for heating does not have to be a high pressure, the low pressure boiler 500 as before, it is provided, the low heat steam generated in the water tank of the low pressure boiler 500 is to be used as a heat source for heating. do.

In this case, the temperature (boiling temperature) and pressure of steam that can be recovered by reheating the waste heat recovered are usually 6 ~ 8.5kg / ㎠, 254 ℃, and the temperature (boiling temperature) and pressure of steam that can be utilized immediately without reheating. Is 8.5kg / ㎠, 177 ℃, so the low pressure steam used as a low heat source in ships is 4kg / ㎠, 151 ℃, and the boiler is used in a large tanker to heat the high pressure steam that turns the turbine for the pump, not for power generation. Considering that it is 18kg / cm 2, 204 ° C., in the present invention, a high pressure boiler 400 is used to make a steam having a pressure of 6 to 12 kg / cm 2 and a temperature of 150 to 300 ° C., and for a low heat source. By using the low pressure boiler 500, the pressure of 3 ~ 6kg / ㎠, the temperature to make the steam of 140 ~ 170 ℃ it is possible to fully utilize the recovered waste heat as a high heat source and a low heat source without the high cost.

On the other hand, for the use of the high pressure boiler 400, between the first and second stage coils of each of the above-mentioned coal mill (a kind of heat exchanger) (200, 202, 204, 206, 208) and the high-pressure boiler 400, a high-pressure supply pipe that is a pipe for moving water or steam ( 402, a high pressure recovery pipe 404, a high pressure discharge pipe 406 is provided.

In addition, in order to use the low pressure boiler 500, a low pressure supply pipe 502, a low pressure recovery pipe (3), which is a pipe for moving water or steam, between the three-stage coils of each of the above-described presses 200, 202, 204, 206 and 208 and the low pressure boiler 400. 504, a low pressure discharge pipe 506 is provided.

At this time, these supply pipe, the recovery pipe, the discharge pipe is preferably configured to be used in parallel so as to be connected in parallel with the pipes of the 1,2,3 stage coil wound in coil form in each of the mills (200,202,204,206,208).

In addition, the temperature according to the high pressure and the low pressure described above can be adjusted to some extent by the number of windings of the coil-shaped pipe, that is, the 1,2- and 3-stage coils.

And, in the case of the high pressure boiler 400, the high pressure supply pipe 402 is connected to the top of the high pressure boiler 400 and the two-stage coil of the coal mill, and the high pressure recovery pipe 404 is the bottom of the two-stage coil and the high pressure boiler 400 is connected, the high pressure discharge pipe 406 is configured to be connected to the steam turbine 410 after connecting the high pressure boiler 400 and the first stage coil.

That is, the high pressure discharge pipe 406, which is the final stage discharged to the steam turbine 410, is finally discharged through the single stage coil to create an environment to be heat-exchanged at a higher temperature than the two stage coil. The first way through is to have a preheating function.

In addition, a part of the high pressure discharge pipe 406 may further be connected to a branch pipe 408 having a separate on-off valve (not shown), the branch pipe 408 may be provided for withdrawing the preliminary heat source.

In addition, it is also preferable to install a control valve (V) on the high-pressure discharge pipe 406 of the portion connected to the steam turbine 410 to control the discharge amount.

On the other hand, in the case of the low pressure boiler 500, the low pressure supply pipe 502 is connected to the low pressure boiler 500 and the lower stage of the three-stage coil, the low pressure recovery pipe 504 is the top of the three-stage coil and the low pressure boiler Connecting the 500, the low pressure discharge pipe 406 is configured to be drawn directly from the low pressure boiler 500 to the required place.

Thus, in one embodiment of the present invention by using the high pressure boiler 400 to make a steam having the required temperature and pressure through the first and second heat exchange, and send it to the steam turbine 410 to the electricity through the generator 420 It can be produced, and also shows a configuration that can be obtained using the low pressure boiler 500 to obtain the steam required for heating.

As another example, in FIG. 3 showing only one of the manifolds for convenience of description, the connection configuration of the low pressure boiler 500 is the same as the example of FIG. 2, but the connection configuration of the high pressure boiler 400 is not a complicated configuration as shown in FIG. 2. The water from the high-pressure boiler 400 shows a configuration that is transformed to be utilized as a high heat source while going straight through the first stage coil and the second stage coil in sequence or the second stage coil and the first stage coil in sequence.

Figure 4 shows another example, the configuration of the low pressure boiler 500 is the same as the example of Figure 2, the high pressure boiler 400 is configured to be discharged to the steam turbine 410 immediately after passing through only one coil. In bar, in this case, the steam turbine 410 may be utilized when the temperature range or pressure that can be turned relatively low.

That is, in this case, the heat exchange coil is provided with only one stage and two stages. Instead, the first stage coil has a winding length of two to three times greater than that of the two stage coils in order to obtain the efficiency as described above. desirable.

Referring to the waste heat recovery method according to the invention made in such a configuration as follows.

The waste heat recovery method described herein is a case in which the loop (circuit) structure as shown in FIG. 2 is selected as the most preferred embodiment and described based on this. In the case of FIGS. Although it may differ from the description, it may be understood as it is of the same category.

First, to describe the high-voltage circuit for turning the generator 420, as shown in Figure 2, the water in the water tank of the high-pressure boiler 400 is transferred to the two-stage coil of each of the above-mentioned cutters 200, 202, 204, 206, 208.

The water thus transferred is heated in heat exchanger with the high-temperature exhaust gases generated from the engines 100, 102, 104, 106, and 108 in the above-described mills 200, 202, 204, 206, and 208, which have a temperature corresponding to a medium temperature.

Subsequently, the water heated up by the first heat exchange is withdrawn from the second stage coil and flows into the high pressure boiler 400 through the high pressure recovery pipe 404 to generate steam, that is, steam.

The generated steam is discharged through the high-pressure discharge pipe 406 again and flows into the first stage coils of the above-described mills 200, 202, 204, 206, and 208 to be converted into hot steam (superheated steam) by undergoing a second heat exchange process, that is, reheating. In addition, the high temperature steam is supplied to the steam turbine 410 to rotate the generator 420 to generate electricity.

As such, the high-pressure circuit forms a loop for turning the steam turbine 410 through the form of "water → steam generation → steam heating."

On the other hand, in the low pressure circuit, the water in the water tank of the low pressure boiler 500 flows into the three-stage coil of each of the above-described cinders 200, 202, 204, 206, and 208, and heats up, thereby increasing the temperature. 504 is taken into the low pressure boiler 500 to be vaporized low pressure, which is provided to each required location through the low pressure discharge pipe 506 to be used as a heating heat source in the vessel.

In another example, in the case of FIG. 3, water from the water tank of the high pressure boiler 400 continuously passes through the first stage coil and the second stage coil when the high pressure circuit is constructed, and then vaporizes again after entering the high pressure boiler 400 and steam steam ( 410 may be moved, or water from the water tank of the high pressure boiler 400 passes through the two-stage coil and the first-stage coil sequentially and then enters the high-pressure boiler 400 and vaporizes to the steam turbine 410. It may be operable to be moved, which is in the form of "water → steam generation", resulting in a loop that turns the steam turbine 410 directly without reheating the steam.

In another example, in the case of FIG. 4, water from the water tank of the high-pressure boiler 400 is heat-exchanged for one coil incorporating the first and second stage coils in a high pressure circuit (for example, the number of coils wound). Increase) After securing a high heat source to go back to the high-pressure boiler 400 and vaporized immediately to the steam turbine 410 to form a loop to turn it.

As described above, the present invention recovers and recycles all the waste heat of all the manifolds installed on the vessel, thereby further increasing the efficiency and reducing energy waste.

1 is a block diagram showing a marine manifold waste heat recovery apparatus according to the prior art,

Figure 2 is a block diagram showing an example of a marine manifold waste heat recovery apparatus according to the present invention,

Figure 3,4 is a block diagram showing another example of the marine manifold waste heat recovery apparatus according to the present invention.

♧ description of the symbols for the main parts of the drawing ♧

100,102,104,106,108 .... Institution 200,202,204,206,208 ....

300,302,304,306,308 .... year 400 .... high pressure boiler

402 ... high pressure supply pipe 404 ... high pressure recovery pipe

406 .... High pressure exhaust pipe 408.

410 .... Steam turbine 420 ... Generator

Low pressure boiler 502 Low pressure supply pipe

504 .... Low pressure recovery line 506 .... Low pressure discharge line

Claims (8)

An apparatus for recovering waste heat generated from the engine by using a plurality of engines provided on the vessel, the year connected to each of the engine, and a coal mill respectively installed in the middle of the year; 1,2 and 3-stage coils, wound at intervals from the lower end to the upper end of each of the above-described cutters; A high pressure boiler for steam production of a high heat source; A plurality of high pressure supply pipes connected in parallel to each other to supply water in the water tank of the high pressure boiler to the second stage coil; A plurality of high-pressure recovery pipes connected in parallel with each other to connect the two-stage coil and the high-pressure boiler to return the heat-exchanged water through the two-stage coil to the high-pressure boiler; A high pressure discharge pipe for reheating the steam vaporized at high temperature through the high pressure boiler and passing through the first stage coil to a steam turbine; Low pressure boiler for steam production of low heat source; It is configured to include a low pressure supply pipe, a low pressure recovery pipe, a low pressure discharge pipe for connecting the water in the water tank of the low pressure boiler with the three-stage coil to recover after heat exchange, and vaporized the recovered low temperature water to discharge to the required place A marine manifold waste heat recovery apparatus, characterized in that. The method of claim 1; The high-pressure discharge pipe marine manifold waste heat recovery apparatus, characterized in that the branch pipe having a separate on-off valve is further connected. The method of claim 1; Steam of the high heat source generated through the high pressure boiler is pressure 6 ~ 12kg / ㎠, temperature 150 ~ 300 ℃, steam of the low heat source generated through the low pressure boiler is pressure 3 ~ 6kg / ㎠, temperature 140 ~ 170 ℃ Marine manifold waste heat recovery apparatus, characterized in that. An apparatus for recovering waste heat generated from the engine by using a plurality of engines provided on the vessel, the year connected to each of the engine, and a coal mill respectively installed in the middle of the year; 1,2 and 3-stage coils, wound at intervals from the lower end to the upper end of each of the above-described cutters; A high pressure boiler for steam production of a high heat source; A plurality of high pressure supply pipes connected in parallel to each other to supply water in the water tank of the high pressure boiler to the second stage coil; A plurality of high pressure recovery pipes connected between the first stage coil and the high pressure boiler so as to sequentially transfer the heat-exchanged water through the second stage coil to the first stage coil and return to the high pressure boiler; A high pressure discharge pipe for directly connecting the high temperature steamed steam to the steam turbine via the high pressure boiler; Low pressure boiler for steam production of low heat source; It is configured to include a low pressure supply pipe, a low pressure recovery pipe, a low pressure discharge pipe for connecting the water in the water tank of the low pressure boiler with the three-stage coil to recover after heat exchange, and vaporized the recovered low temperature water to discharge to the required place A marine manifold waste heat recovery apparatus, characterized in that. An apparatus for recovering waste heat generated from the engine by using a plurality of engines provided on the vessel, the year connected to each of the engine, and a coal mill respectively installed in the middle of the year; A first and second stage coils wound at intervals from the lower end to the upper end of each of the above mills; A high pressure boiler for steam production of a high heat source; A high pressure supply tube, a high pressure recovery tube, and a high pressure discharge tube for connecting the water in the high pressure boiler to the first stage coil to recover the heat exchange and recovering the recovered high temperature water into a steam turbine; Low pressure boiler for steam production of low heat source; It comprises a low pressure supply pipe, a low pressure recovery pipe, a low pressure discharge pipe for connecting the water in the water tank of the low pressure boiler with the two-stage coil and recovered after heat exchange, vaporizing the recovered low temperature water to discharge to the required place A marine manifold waste heat recovery apparatus, characterized in that. The method of claim 5; The first stage coil is a marine manifold waste heat recovery apparatus, characterized in that having a winding length 2-3 times longer than the second stage coil. A plurality of engines provided in the vessel, a year connected to each of the engines, a breaker installed in the middle of the year, and a high pressure boiler and a low pressure boiler to vaporize the heat-exchanged water to recover the waste heat generated from the engine In a method; Supplying water in the water bottle of the high pressure boiler to the stop of the coal mill and preheating the water to recover the high pressure boiler; Vaporizing the water preheated through the recovery process in the high pressure boiler; Supplying the steam vaporized through the steaming process to the lower end of the coal mill and reheating it with high temperature steam having a pressure of 6 to 12 kg / cm 2 and a temperature of 150 to 300 ° C .; Supplying hot steam obtained in the reheating process to a steam turbine; It is characterized in that it comprises a step of supplying the water in the water tank of the low pressure boiler to the upper end of the pelletizer, the low-temperature heat exchange, and then recovering back to the low pressure boiler, vaporizing the recovered low temperature water and supplying it to the required place. Waste heat recovery method for ship manifold. A plurality of engines provided in the vessel, a year connected to each of the engines, a breaker installed in the middle of the year, and a high pressure boiler and a low pressure boiler to vaporize the heat-exchanged water to recover the waste heat generated from the engine In a method; Supplying water in the water bottle of the high pressure boiler to the stopper of the coal mill and preheating it, and then supplying it to the bottom to heat exchange with hot water and recovering the high pressure boiler; Vaporizing hot water obtained through the recovery process in the high pressure boiler; Supplying hot steam having a pressure of 6 to 12 kg / cm 2 and a temperature of 150 to 300 ° C. through the vaporization process to a steam turbine; It is characterized in that it comprises a step of supplying the water in the water tank of the low pressure boiler to the upper end of the pelletizer, the low-temperature heat exchange, and then recovering back to the low pressure boiler, vaporizing the recovered low temperature water and supplying it to the required place. Waste manifold waste heat recovery method for ships.

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