KR101444143B1 - Heat Recovery Apparatus for Ship - Google Patents

Abstract

The present invention relates to a waste heat absorbing device comprising a waste heat absorbing unit including a heat absorbing part for recovering heat generated in an engine and a cooling part for cooling the engine, a first supply line through which a first heat medium that is heat- A second supply line communicating the first heat medium that has been heat-exchanged in the heat exchanger to the heat absorber, and a second supply line that communicates with the second heat exchanger through the cooling unit, wherein the heat transfer unit includes a heat exchanger communicating with the first heat medium and absorbing heat recovered by the first heat medium, A cooling line through which the heating medium is discharged, and a heating medium exchanging section for exchanging the first heating medium of the second supply line with the second heating medium of the cooling line.

Description

[0001] Heat Recovery Apparatus for Ship [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ship waste heat recovery apparatus, and more particularly, to a ship waste heat recovery apparatus for controlling a flow rate by connecting a heating medium of a waste heat recovery unit and a cooling water line recovered from waste heat of an engine.

In recent years, as the era of high oil prices has arrived, efforts have been made to improve the energy efficiency of vessels to reduce fuel costs and to secure eco-friendliness of ship operations.

Generally speaking, energy is consumed most of the energy in the propulsion main engine, and about 25% of the fuel consumed for operation of the main engine is discharged into the atmosphere by the exhaust gas. Therefore, various devices for recovering a part of the waste heat using such exhaust gas are actively being introduced.

A heat recovery apparatus (boiler) is installed in an exhaust pipe where exhaust gas is exhausted from an engine of a ship according to the related art waste heat recovery apparatus according to the related art, and the heat of the exhaust gas is recovered (isobaric heating) Respectively.

However, in the conventional waste heat recovery apparatus, there is a problem that effective heat recovery and supply can not be performed according to various environmental changes due to malfunction of the entire system, by collecting and supplying heat at a predetermined flow rate.

Korean Patent Publication No. 10-2011-0088529

The present invention relates to a waste heat recovery apparatus for a ship, which comprises a connection line through which a first heat medium flowing in a waste heat recovery unit and a second heat medium recovering waste heat of an engine can flow with each other, The present invention provides a ship waste heat recovery apparatus capable of controlling the flow rate or temperature of a single heat medium.

In order to solve the above problems, an apparatus for recovering waste heat of a ship according to the present invention includes a waste heat absorbing unit including a heat absorbing unit for recovering heat generated in an engine and a cooling unit for cooling the engine, A waste heat recovery unit including a first supply line through which the heating medium flows, a heat exchanger communicated with the first supply line and absorbing the heat recovered by the first heat medium, A cooling line through which the second heating medium passed through the cooling section is discharged, and a heating medium exchanging section for exchanging the first heating medium of the second supply line with the second heating medium of the cooling line.

A first connection line connecting the second supply line and the cooling line and flowing a first heating medium flowing through the second supply line to the cooling line, and a second connection line connecting the cooling line and the second supply line, And a second connection line for flowing a second heat medium flowing through the cooling line to the second supply line.

And a third connection line connecting the second connection line and the first connection line and flowing at least a part of the second heating medium flowing through the second connection line to the first connection line.

The second supply line is provided with a temperature sensor for measuring the temperature of the first heat medium flowing through the second supply line and the flow rate of the heat medium flowing through the third connection line can be interlocked with the temperature sensor .

And a bypass line connecting the first supply line and the second supply line and flowing a first heat medium flowing through the first supply line to the second supply line.

Here, the second connection line is provided with a pressurizing pump for applying a circulation force, and the second supply line is provided with a circulation pump for circulating the circulation pump. The circulation pump circulates the circulation pump And a line is connected to the second supply line.

The circulation pump for supplying circulation force to the first supply line may include a circulation pump for supplying a circulation force to the first connection line, May be placed at the front end of the point connected to the supply line.

The point at which the first connection line is connected to the second supply line may be disposed behind the point at which the second connection line is connected to the second supply line based on the flow of the first heat medium.

The point at which the first connection line is connected to the cooling line may be disposed rearward relative to the flow of the second heating medium rather than a point at which the second connection line is connected to the cooling line.

The apparatus for recovering waste heat of a ship according to the present invention has the following effects.

First, it is possible to control the flow rate of the second heat medium that has cooled the engine and the first heat medium that has recovered heat from the waste heat recovery unit, so that the first heat medium having the optimum temperature can flow into the waste heat recovery unit.

Second, there is an advantage that the waste heat generated by the engine can be absorbed without being influenced by the operation of the waste heat recovery unit by selectively bypassing the first heat transfer body absorbing the waste heat generated from the engine and delivering the waste heat to the waste heat recovery unit .

Third, there is an advantage that the heating medium for effective heat exchange of the entire system can be adjusted through a simple connection between pipes provided in a common waste heat recovery system.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

FIG. 1 is a schematic view of a waste heat recovery system according to an embodiment of the present invention; FIG.
FIG. 2 is a schematic view showing the construction of a waste heat recovery unit in the waste heat recovery apparatus of FIG. 1; FIG.
3 is a view showing a schematic configuration of a waste heat recovery apparatus according to a second embodiment of the present invention;
FIG. 4 is a view showing a schematic configuration of a waste heat recovery apparatus according to a third embodiment of the present invention; FIG.
5 is a view showing a schematic configuration of a waste heat recovery apparatus according to a fourth embodiment of the present invention;
6 is a view showing a schematic configuration of a waste heat recovery apparatus according to a fifth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

First Embodiment

Fig. 1 is a view showing a schematic configuration of a waste heat recovering apparatus of the present invention, and Fig. 2 is a view schematically showing a configuration of a waste heat recovering unit in the waste heat recovering apparatus of Fig.

The waste heat recovering apparatus of the present invention supplies waste heat generated from an engine (E) provided on a ship to various heat consumers of the ship, such as humidification, dehumidification, and maintenance of the temperature of a specific part of the ship. As shown in the figure, the waste heat recovery apparatus of the present embodiment is configured to generate new power by using waste heat generated by operating a separate cycle using waste heat generated from the engine E provided in the ship.

The waste heat recovering apparatus of the present invention includes a waste heat absorbing unit 100, a first supply line 200, a waste heat recovery unit 300, a second supply line 400, a cooling line 600, and a heat medium exchange part.

The waste heat absorbing unit 100 is a structure for recovering or cooling the heat generated by the driving of the engine E. Specifically, it recovers or cools the engine itself, the exhaust gas discharged from the engine E, the scavenging gas A supplied to the engine, and the oil contained in the engine E. [ And includes a heat absorbing part 110 and a cooling part 120.

The heat absorbing portion 110 and the cooling portion 120 are disposed on the exhaust path of the exhaust gas G generated from the engine E or on the path of the desired air A supplied to the engine E, It is possible to absorb the heat of the gas (G) or the scavenging air (A). In addition, the heat absorbing portion 110 may absorb the heat of the engine E itself and the engine oil. The heat absorbing portion 110 and the cooling portion 120 have a configuration similar to that of a general heat exchanger, and a heat medium L1 for absorbing heat flows.

It is assumed that the heat absorber 110 in this embodiment absorbs the heat of the desired air A supplied to the engine E after passing through the turbocharger T through the first heat medium L1 do. It is assumed that the cooling section 120 in this embodiment cools the engine A to a limited temperature for supplying the engine E with the desired air heat-exchanged in the heat absorbing section 110 through the second heat medium L3.

That is, in this embodiment, the heat absorbing portion 110 and the cooling portion 120 are provided on the moving path of the scavenging air A flowing into the engine E to multi-stage the scavenging air A.

In the first supply line 200, the heating medium L1 flows inside and connects the heat absorber 110 to the heat exchanger 310 of a waste heat recovery unit 300 described later. The first heat medium L1 absorbing heat through the heat exchange with the desired air A in the heat absorber 110 flows to the heat exchanger 310 along the first supply line 200. [

The waste heat recovery unit 300 is a device that can absorb heat transferred by the heat medium L1 and utilize it in various places. In this embodiment, the waste heat recovery unit 300 is configured to generate power by driving a separate turbine 330.

The waste heat recovery unit 300 may be formed in accordance with various types of heat exchange cycles, and may be provided in an ORC (Organic Rankine Cycle) in the present embodiment.

The waste heat recovery unit 300 may include a circulation loop 350, a turbine 330, a heat exchanger 310 pump 340, and a condenser 320. The circulating loop 350 circulates the circulating fluid L2 and circulates the heat in the order of the heat exchanger 310, the turbine 330, the condenser 320 and the pump 340 to collect and supply heat.

The heat exchanger 310 is disposed on the path of the first supply line 200 to allow heat exchange between the circulating fluid L2 and the first heat medium L1 absorbing heat from the heat absorber 110. [

The circulating fluid L2 is vaporized through heat exchange with the first heat medium L1 via the heat exchanger 310 along the circulation loop 350 and the vaporized circulating fluid L2 drives the turbine 330 . The circulating fluid L2 via the turbine 330 is again cooled and liquefied via the condenser 320. And the liquefied circulating fluid L2 is supplied to the heat exchanger 310 through the pump 340. [

The circulating fluid L2 flowing in the circulation loop 350 is selected according to the temperature of the heating medium L1 provided in the heat exchanger 310 and may be generally a fluid having a boiling point lower than that of water.

The first heating medium L1 flows in the second supply line 400 and connects the heat absorber 110 to the heat exchanger 310 of the waste heat recovery unit 300. The first heating medium L1 that has been discharged from the heat exchanger 310 to the circulating fluid L2 flows to the heat absorber 110 along the second supply line 400. [

In the cooling line 600, the second heating medium L3 having passed through the cooling unit 120 is discharged. A second heating medium L3 flowing through the cooling line 600 through the first connection line 700 or the second connection line 800 to be described later and a first heating medium L1 flowing through the second supply line 400, . The second heat medium flowing through the cooling line 600 may be a heat medium of the same kind as the first heat medium L1 flowing through the second supply line 400. [ For example, Fresh water inside the vessel may be used, but is not limited thereto.

The heating medium exchanging part 1000 exchanges the first heating medium flowing through the cooling line 600 and the second heating medium flowing through the second supply line 400. [ The specific structure of the heating medium exchanging part 1000 for the exchange may be variously formed and includes a first connecting line 700 and a second connecting line 800 in the present embodiment.

The first connection line 700 connects the second supply line 400 and the cooling line 600 and flows the first heating medium L1 flowing through the second supply line 400 to the cooling line 600 .

The first connection line 700 is provided with a flow rate control valve 710 for controlling the flow rate. Therefore, it is possible to control the amount of flow flowing in accordance with the heat supply and demand of the entire system such as the temperature of the scavenging gas and the degree of heat exchange in the waste heat recovery unit 300.

Specifically, when the circulating medium L2 of the heat exchanger 310 can not sufficiently recover heat, the temperature of the first heating medium L1 may not be sufficiently lowered. Therefore, when the first heating medium L1 is heated by the heat absorbing portion 110, The air A can not be cooled close to the set value. Accordingly, the flow rate of the first heating medium L 1 bypassed to the first connection line 700 is increased to further reduce the flow rate of the first heating medium L 1 of the second supply line 400.

On the other hand, when the circulating medium L2 sufficiently recovers heat, the set value can be maintained or reduced without increasing the flow rate of the first heating medium L1 bypassed to the first connecting line 700. [

Therefore, even when heat recovery is not sufficiently performed due to malfunction of the heat exchanger 310, the first heat medium L1 having an appropriate temperature can be flowed to the heat absorber 110.

The second connection line 800 connects the cooling line 600 and the second supply line 400 and flows the second heating medium L3 flowing through the cooling line 600 to the second supply line 400 .

The second heating medium L3 flowing through the cooling line 600 is combined with the first heating medium L1 flowing through the second supply line 400 through the second connection line 800 to be returned to the heating heat recovery unit 110 And the waste heat is recovered.

The second connection line 800 may be provided with a pressurizing pump 810 for supplying power that allows the second heating medium L 3 to flow to the second supply line 400.

Meanwhile, the first connection line 700 and the second connection line 800 may be connected to various points of the second supply line 400 and the cooling line 600. In this embodiment, the point where the first connection line 700 is connected to the second supply line 400 is greater than the point where the second connection line 800 is connected to the second supply line 400, ) To the rear. In other words, the point where the first connection line 700 and the second supply line 400 are connected is longer than the point where the second connection line 800 and the second supply line 400 are connected to the waste heat recovery unit 300 It can be close.

The point at which the first connection line 700 is connected to the cooling line 600 is closer to the rear than the point at which the second connection line 800 is connected to the cooling line 600 on the basis of the flow of the second heating medium L3 . That is, the point where the first connection line 700 and the cooling line 600 are connected may be closer to the waste heat absorbing unit 100 than the point where the second connection line 800 and the cooling line 600 are connected .

Meanwhile, the waste heat recovery apparatus of the present invention may further include a third connection line 900, a bypass line 500, and a circulation pump 410.

The third connection line 900 connects the second connection line 800 and the first connection line 700 and connects at least part of the second heating medium L3 flowing through the second connection line 800 to the first connection Line 700 as shown in FIG.

Accordingly, the amount of the second heating medium L3 supplied to the second supply line 400 through the second connection line 800 can be adjusted. As a result, the temperature of the first heating medium L1 supplied to the waste heat recovery unit 110 can be adjusted, and the first heating medium L1 having the optimum temperature can be supplied to the waste heat recovery unit 110. [

On the other hand, the determination of the optimum temperature may be performed according to various conditions such as temperature, pressure, and the like at various points in the entire system. In this embodiment, the temperature sensor 420 provided in the second supply line 400 is a waste heat The temperature of the first heating medium L1 flowing out from the recovery unit 300 is measured and the flow rate of the second heating medium L3 flowing to the third connection line 900 is calculated.

A flow rate control valve 910 may be provided at a point where the third connection line 900 and the second connection line 800 meet to control the flow rate. A flow control valve 720 capable of controlling the flow rate of the second heating medium L3 supplied through the third connection line 900 and the first connection line 700 may be provided in the first connection line 700 have.

The bypass line 500 is configured such that both ends thereof are respectively connected to the first supply line 200 and the second supply line 400 to selectively bypass the first heating medium L1. Specifically, by selectively bypassing the first heating medium L1, which is configured to branch in the first supply line 200 and move along the first supply line 200, the first heating medium L1 flows into the second heat exchanger 320 To the second supply line 400 and then to the heat absorbing portion 110 again.

The bypass line 500 is connected to the second supply line 400 at the rear end of the point where the first connection line 700 is coupled to the second supply line 400 on the basis of the direction of the first heating medium L1 flowing in the second supply line 400 . The first heating medium L1 flowing through the bypass line 500 is not cooled through the waste heat recovering unit 300 but flows through the first connecting line 700 and the second connecting line 800, It is possible to maintain an appropriate temperature for flowing into the waste heat recovering portion 110 by the flow of the heating medium L1 and the second heating medium L2.

A separate flow control valve 510 may be provided at a point where the first supply line 200 and the bypass line 500 are connected to each other so that the flow path of the first heating medium L1 moving along the first supply line 200 And the flow rate can be selectively adjusted. In this embodiment, the bypass line 500 and the first supply line 200 are respectively provided with flow control valves 510 and 210 that can control the flow rate of the first heating medium L1.

On the other hand, in the case of the first heating medium L1 flowing in the bypass line 500, since the heat is not collected in the waste heat recovery unit 300, it is relatively high in temperature and thus flows into the first connection line 700 The first heating medium L1 flowing into the waste heat recovery unit 110 may be increased by increasing the flow rate of the first heating medium L1 or by increasing the flow rate of the second heating medium L2 flowing into the second connection line 800, It is possible to appropriately adjust the temperature of the gas.

Further, in the present embodiment, the heat of the waste heat recovery unit 110 can be continuously recovered even when the waste heat recovery unit 300 malfunctions or fails. The flow regulating valve 210 of the first supply line 200 may be closed to allow the entire first heating medium L1 to flow to the bypass line 500 without flowing into the waste heat recovery unit 300.

The circulation pump 410 is provided in the first supply line 200 or the second supply line 400 to provide a circulation force to the first heating medium L1 and is provided in the second supply line 400 in this embodiment do.

Hereinafter, the flow of the heat medium and the heat recovery process according to the present embodiment will be described.

The first heat medium L1 recovered from the heat absorbing portion 110 flows through the first supply line 200 to the heat exchanger 310 of the waste heat recovering unit 300 to heat the circulating fluid L2 Supply. The circulating fluid L2 circulates through the respective constitutions of the waste heat recovery unit 300 to supply heat to the heat consumer and receives heat from the first heat medium L1.

At this time, in the case of the degree of heat exchange between the circulating fluid L2 and the first heat medium L1 and the malfunction of the waste heat recovery unit 300, at least a part of the first heat medium L flowing through the first supply line 200 May be supplied to the second supply line 400 through the bypass line 500.

A portion of the first heating medium L1 discharged from the waste heat recovery unit 300 and flowing through the second supply line 400 is supplied to the cooling line 600 through the first connection line 700. [ A part of the second heating medium L3 flowing in the cooling line 600 flows into the second supply line 400 through the second connection line 800. [

Through this process, the temperature of the first heating medium L1 flowing through the second supply line 400 is set at a temperature suitable for recovering the heat of the heat absorber 110.

A portion of the second heating medium L3 flowing through the second connection line 800 is supplied to the first connection line 700 through the third connection line 900 to set the appropriate temperature, (600).

Second Embodiment

3 is a view showing a schematic configuration of a waste heat recovery apparatus according to a second embodiment of the present invention.

3, the structure of the waste heat recovery apparatus of the second embodiment of the present invention will be described, and the other structures and operations are the same as those of the first embodiment, and the following description will focus on the other structures.

In this embodiment, the second connection line 800 is provided with a pump 810 capable of controlling the flow rate. Therefore, it is possible to simplify the entire system by eliminating the configuration of the valve or the like for controlling the flowing flow rate.

Third Embodiment

4 is a diagram showing a schematic configuration of a waste heat recovery apparatus according to a third embodiment of the present invention.

4, the configuration of the waste heat recovery apparatus of the third embodiment of the present invention will be described, and other configurations and actions are the same as those of the first and second embodiments, and the following description will focus on other configurations.

In this embodiment, the circulation pump 410 'for circulating the circulating fluid is disposed at a rear end of the circulation pump 410' relative to the flow direction of the first heating medium L1 and the bypass line 500 is connected to the second supply line 400 .

Therefore, when all of the first heat medium L1 of the first supply line 200 flows to the bypass line 500 due to a malfunction of the waste heat recovery unit 300, the operation of the circulation pump 410 ' It is possible to realize a stable system.

In the meantime, although not shown, when the circulation pump is provided in the first supply line 200, the circulation pump is connected to the first supply line 200 at a point where the bypass line 500 is connected to the first supply line 200 It may be placed at the front end.

Fourth Embodiment

5 is a view showing a schematic configuration of a waste heat recovery apparatus according to a fourth embodiment of the present invention.

Referring to FIG. 5, the waste heat recovering unit 110 in this embodiment is disposed on a path through which the exhaust gas G flows, not the scavenging air A, to recover heat of the exhaust gas. Although not shown, as described above, the heat generated in the engine itself may be recovered or the heat generated in the engine oil may be recovered.

Other configurations and operations are the same as those of the above-described embodiments, and a description thereof will be omitted.

Fifth Embodiment

6 is a diagram showing a schematic configuration of a waste heat recovery apparatus according to a fifth embodiment of the present invention. 5, the waste heat recovery unit 110 in this embodiment includes a first heat absorber 112 for recovering the heat of the scavenging air A and a second heat absorber 112 disposed on a path through which the exhaust gas G flows, And a second heat absorber 114 for recovering the heat of the gas.

That is, heat is more efficiently recovered from a plurality of heat sources, and the first heat recoverer 112 and the second heat recoverer 114 are arranged in parallel in the figure, but they are arranged in series, .

Further, as described above, various piping connections may be implemented in combination with the heat generated in the engine itself or the heat recovery from the engine oil.

Other configurations and operations are the same as those of the above-described embodiments, and a description thereof will be omitted.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

100: waste heat absorbing unit 110: heat absorbing unit
120: cooling unit 200: first supply line
300: waste heat recovery unit 400: second supply unit
500: bypass line 510: flow control valve
600: cooling line 700: first connection line
800: second connection line 900: third connection line
910: Auxiliary valve G: Exhaust gas
A: Wasted air L1, L3: Heat medium
L2: Circulating fluid

Claims (9)

A waste heat absorbing unit including a heat absorbing portion for recovering heat generated by driving of the engine and a cooling portion for cooling heat generated by driving the engine;
A first supply line through which the first heat medium heat-exchanged in the heat absorber flows;
A waste heat recovery unit communicating with the first supply line and including a heat exchanger for absorbing heat recovered by the first heat medium;
A second supply line for transferring the first heat medium, which has been heat-exchanged in the heat exchanger, to the heat absorber;
A cooling line through which the second heat medium having passed through the cooling section is discharged;
And a heat medium exchange unit for exchanging the second heat medium of the cooling line with the first heat medium of the second supply line. The method according to claim 1,
The heat medium exchanging part
A first connection line connecting the second supply line and the cooling line and flowing a first heating medium flowing through the second supply line to the cooling line; And
And a second connection line connecting the cooling line to the second supply line and flowing the second heat medium flowing through the cooling line to the second supply line. 3. The method of claim 2,
A third connection line connecting the second connection line and the first connection line and flowing at least a part of a second heat medium flowing through the second connection line to the first connection line, . The method of claim 3,
Wherein the second supply line is provided with a temperature sensor for measuring the temperature of the first heat medium flowing through the second supply line,
And the flow rate of the second heat medium flowing through the third connection line is interlocked with the temperature sensor. 3. The method of claim 2,
Further comprising a bypass line connecting the first supply line and the second supply line and causing a first heat medium flowing through the first supply line to flow to the second supply line. 6. The method of claim 5,
Wherein the second connection line is provided with a pressurizing pump for applying a circulation force and the second supply line is provided with a circulation pump for applying a circulation force,
Wherein the circulation pump is disposed at a rear end of a point where the bypass line is connected to the second supply line based on a flow direction of the first heat medium. 6. The method of claim 5,
Wherein the first connection line is provided with a pressurizing pump for applying a circulating force,
Wherein the circulation pump that applies the circulation force to the first supply line is disposed at a front end of a point where the bypass line is connected to the first supply line based on the flow direction of the first heat medium. 3. The method of claim 2,
Wherein the point of connection of the first connection line to the second supply line is behind the point of connection of the second connection line to the second supply line with respect to the flow of the first heat medium. delete

Images