KR102205341B1 - Heat exchanger for exhaust heat recovery in the all-in-one ghp - Google Patents

Abstract

The present invention relates to a heat exchanger for exhaust heat recovery in a unified GHP, which reduces temperature of exhaust gas of a gas engine through a unified heat exchanging configuration and can use all of refrigerating, freezing, cooling and heating, and high temperature water functions regardless of seasons through heat exchange with cooling water.

Description

Heat exchanger for unified GHP heat recovery {HEAT EXCHANGER FOR EXHAUST HEAT RECOVERY IN THE ALL-IN-ONE GHP}

The present invention relates to a heat exchange device for unified GHP heat recovery, and more specifically, through a unified heat exchange configuration, reducing the temperature of the exhaust gas of a gas engine and at the same time heat exchange with cooling water to refrigerate and freeze regardless of the season. It relates to a heat exchanger for unified GHP heat recovery that enables both heating and cooling, and hot water use.

In general, a heat exchange device using waste heat from an engine uses the heat of exhaust gas and cooling water among the heat emitted by driving the engine as a heat source, and the heat of such exhaust gas and cooling water is used as a refrigerant used in a cooling/heating system or an air conditioning system. It is heat-exchanged and used to form a refrigerant at a high temperature to increase the efficiency of the cooling and heating system.

However, in such a cooling and heating system using exhaust gas and cooling water heat, there is a problem that the configuration and facilities become complicated in order to produce cooling and heating and hot water while meeting the required capacity for cooling and heating by season, and there are many difficulties in managing such complex configurations and facilities. There are scattered problems such as taking time and cost.

Korean Patent Publication No. 10-2010-0094221

In order to solve the above problems, the present invention reduces the temperature of the exhaust gas of the gas engine and at the same time heat exchange with the cooling water through an uncomplicated and unified heat exchange configuration, regardless of the season, refrigeration, freezing, cooling and heating, high temperature It is intended to provide a unified heat exchanger for GHP heat recovery that enables all of the use of water and, in particular, enables more efficient use and management of engine heat.

The heat exchange device for unified GHP heat recovery according to an embodiment of the present invention is provided on the inner side of the outer housing and the outer housing connected to the engine and formed to inflow and discharge exhaust gas and cooling water, and the coolant flowing through the outer housing. Is configured to flow in the longitudinal direction, and the exhaust gas introduced through one side of the outer housing is configured to flow through the longitudinal direction, thereby including an inner housing configured to exchange heat between the cooling water and the exhaust gas It can be characterized by that.

In one embodiment, at one side of the outer housing, a cooling water inlet through which the cooling water is introduced, an external cooling water outlet through which the cooling water introduced through the cooling water inlet is discharged to the outside through the inner housing, and exhaust gas through which the exhaust gas is introduced. An inlet and an exhaust gas outlet through which the exhaust gas introduced through the exhaust gas inlet passes through the inner housing and is discharged to the outside may be provided.

In one embodiment, the inner housing is provided in a cross-sectional direction from one end portion of the inner housing and has one or more holes, and a second partition wall is provided in the cross-sectional direction from the other end portion of the inner housing and has one or more holes. , Each of the holes provided in the first and the first partition walls is connected, and at least one cooling water pipe formed to flow through the cooling water in a longitudinal direction and the outer cooling water outlet are connected to each other, and each of the at least one cooling water pipe passes through It may be characterized in that it comprises an inner cooling water outlet through which one cooling water is discharged to the outside.

In one embodiment, the cooling water pipe may be characterized in that the thread is formed along the longitudinal direction on the side.

In one embodiment, a hot water inlet and a hot water outlet are further provided on one side of the outer housing, and are connected to the hot water inlet and the hot water outlet on an inner side of the inner housing, and are located adjacent to side surfaces of the one or more cooling water pipes. It may be characterized in that a hot water pipe is provided.

In one embodiment, the hot water pipe may be curved a plurality of times along the longitudinal direction of the cooling water pipe inside the inner housing.

In one embodiment, the hot water pipe may have a shape surrounding the outside of the cooling water pipe inside the inner housing.

In one embodiment, as one of the inner end portions of the outer housing is formed in a cone shape protruding in the inward direction, the coolant introduced through the coolant inlet is along the inner wall between the outer housing and the inner housing. It may be characterized in that it is concentrated while being collected in a direction toward the one or more cooling water pipes after it flows and hits the cone shape.

In one embodiment, one or more baffles and one or more baffles for connecting and supporting each other at a predetermined interval in the cross-sectional direction of the inner housing along the length direction of the cooling water pipe in the inner housing. A support rod is provided, and the flow of the exhaust gas introduced through the exhaust gas inlet is interrupted by the at least one baffle plate and is stagnated, and a time for the exhaust gas to stay in the inner housing is increased.

In one embodiment, the at least one baffle plate is provided with a cutout area through which exhaust gas passes, and a cutout area formed on odd-numbered baffle plates and a cutout area formed on even-numbered baffle plates among the one or more baffle plates May be characterized in that they are disposed to be shifted to face opposite directions.

According to an aspect of the present invention, by supplying heat to a hot water line while lowering an exhaust gas temperature of an engine, it is possible to unify the use of efficient gas engine driving for refrigeration, refrigeration, cooling and heating, and hot water.

In particular, according to an aspect of the present invention, it has the advantage of enabling all use of refrigeration, freezing, cooling and heating, and hot water regardless of the season.

In particular, according to an aspect of the present invention, hot water supplied through a separate hot water line is heated with exhaust gas heat, thereby producing hot water regardless of cooling and heating operations.

In particular, according to an aspect of the present invention, it is possible to increase the heat exchange time between the exhaust gas and the cooling water through a baffle structure, and also increase the contact area between the cooling water pipe and the exhaust gas by forming a thread on the side of the cooling water pipe. It has the advantage of effectively performing heat exchange.

In addition, according to one aspect of the present invention, there is an advantage that can be applied to a high-efficiency heat pump for efficient gas engine driven refrigeration, refrigeration, cooling and heating, and high-temperature water unification.

1 is a view showing the overall shape of a heat exchange device 100 for unified GHP heat recovery according to an embodiment of the present invention.
2 is a view showing the outer housing 110 shown in FIG. 1 in more detail.
3 is a view showing the inner housing 120 shown in FIG. 1 in more detail.
4 is a view illustrating the inner housing 120 shown in FIG. 3 at various angles.
5 is a diagram illustrating a flow of cooling water through the cooling water pipe 123 shown in FIG. 3.
6 is a view showing the flow of exhaust gas through the inner housing 120 shown in FIG.
7 is a view showing the hot water pipe 124 shown in FIG. 3 in more detail.
8 is a more detailed view of the baffle plate 128 shown in FIG. 3.
9 is a view showing the flow of cooling water and exhaust gas through the unified GHP heat exchanger 100 for heat recovery.

Hereinafter, a preferred embodiment is presented to aid the understanding of the present invention. However, the following examples are provided for easier understanding of the present invention, and the contents of the present invention are not limited by the examples.

1 is a view showing the overall shape of a heat exchange device 100 for unified GHP heat recovery according to an embodiment of the present invention, and FIG. 2 is a view showing the outer housing 110 shown in FIG. 1 in more detail. 3 is a diagram showing the inner housing 120 shown in FIG. 1 in more detail, FIG. 4 is a view showing the inner housing 120 shown in FIG. 3 at various angles, and FIG. 3 is a view showing the flow of cooling water through the cooling water pipe 123 shown in FIG. 6, and FIG. 6 is a view showing the flow of exhaust gas through the inner housing 120 shown in FIG. 3.

First, referring to FIGS. 1 to 4, the heat exchange device 100 for unified GHP heat recovery according to an embodiment of the present invention is largely configured to include an outer housing 110 and an inner housing 110.

As one side of the outer housing 110 is connected to the wet manifold of the gas engine, high-temperature exhaust gas discharged from the wet manifold is introduced in the inner direction. The outer housing 110 is provided with an outer coolant inlet 111, an outer coolant outlet 112, an outer exhaust gas inlet 113, and an outer exhaust gas outlet 114.

The coolant discharged from the gas engine flows through the outer coolant inlet 111, where the coolant flows in through the gap between the outer housing 110 and the inner housing 110 along the inner wall of the outer housing 110 and then again. It flows in the inner direction of the inner housing 110.

At this time, at the inner end portion of the outer housing 110, a cone shape 115 protruding in the inward direction is provided, and the cooling water flowing along the inner wall of the outer housing 110 hits the cone shape 115 and changes the direction. It enters into the inside of the inner housing 120.

The inner housing 120 is provided in a cross-sectional direction from one end portion, a first partition wall 121 having one or more holes formed therein, and a second partition wall 122 provided in the cross-sectional direction at the other end portion of the inner housing 120 and having one or more holes. ), each of the holes provided in the first and second partition walls is connected, and connected to one or more cooling water pipes 123 and the outer cooling water outlet 112 formed to flow through the cooling water along the length direction, and one or more cooling water pipes It is configured to include an inner cooling water outlet 125 through which the cooling water passing through 123 is discharged to the outside.

As shown in FIG. 5, the cooling water whose direction has been changed after being hit by the cone shape 115 of the outer housing 110 flows through one or more cooling water pipes 123 through the second partition wall 122 of the inner housing 120. do.

At this time, the high-temperature exhaust gas introduced through the outer exhaust gas inlet 113 of the outer housing 110 flows through the inner housing 110, and the cooling water pipe 123 is heated by the exhaust gas. The temperature rises. Similarly, the temperature of the exhaust gas is lowered by the cooling water corresponding to a relatively low temperature.

In this case, a thread is formed on the outside of the one or more cooling water pipes 123 along the longitudinal direction, and through this, the surface area with the exhaust gas is widened, so that it can be heated more easily. In addition, at least 27 cooling water pipes 123 may be provided.

On the other hand, the first and second partition walls 121 and 122 are provided in the inner housing 110 so that high-temperature exhaust gas flowing through the outer exhaust gas inlet 113 of the outer housing 110 does not leak from the inner housing 110. It is provided at both ends of the.

Therefore, as shown in FIG. 6, the high-temperature exhaust gas introduced through the outer exhaust gas inlet 113 is directly supplied to the inner housing 120, and has passed through one or more baffle plates 128 provided in the inner housing 110. After that, it is discharged in the engine direction again through the outer exhaust gas outlet 114 of the outer housing 110.

In addition, the coolant that has passed through the one or more coolant pipes 123 of the inner housing 120 is discharged back to the engine direction through the inner coolant outlet 125 and the outer coolant outlet 112 of the outer housing 110.

In addition, a hot water inlet 116 and a hot water outlet 117 connected to the hot water pipe 124 provided inside the inner housing 120 are provided outside the outer housing 110.

The hot water pipe 124 passes through the hot water inlet 116 and leads to the inside of the inner housing 120, where hot water is heated while directly in contact with the exhaust gas inside the inner housing 120, and the heated hot water is again a hot water pipe. It comes out through the hot water outlet 117 through 124. Looking at the hot water pipe 124 is as follows.

7 is a view showing the hot water pipe 124 shown in FIG. 3 in more detail.

7 is a view showing a state in which the inner wall is removed from the inner housing 120. The hot water pipe 124 has a shape surrounding the cooling water pipe 123 inside the inner housing 120, and in particular, it is bent a number of times along the longitudinal direction of the cooling water pipe 123. Since the hot water pipe 124 has a length of 4 m to 6 m, it is bent as much as possible within the narrow space of the inner housing 120 to widen the contact area with the hot exhaust gas.

Returning to FIGS. 1 to 4 again, one or more baffles 128 and one at regular intervals in the cross-sectional direction of the inner housing 110 along the longitudinal direction of the cooling water pipe 123 on the inner housing 120 One or more support rods 128 connecting the baffle plates 128 to each other are provided. Looking at the baffle plate 128 and the support rod 129 are as follows.

8 is a more detailed view of the baffle plate 128 shown in FIG. 3.

Referring to FIG. 8, the baffle plate 128 is installed in a cross-sectional direction from the inside of the inner housing 110, and at this time, the baffle plate 128 contains exhaust gas flowing in the inner housing 110 in the inner housing 110. A cut-out area 128a, which is a passage flowing along the inner wall of ), is formed. At this time, the cut-out areas 128a of each baffle plate 128 are arranged so that the odd-numbered baffle plates and the even-numbered baffle plates face opposite directions with respect to the longitudinal direction of the cooling water pipe 123. Therefore, the exhaust gas flowing into the inner housing 110 does not flow directly through the outer exhaust gas outlet 114, but flows in a zigzag shape after interference is first generated by the baffle plate 128. . This has an effect of increasing the time that the exhaust gas stays in the inner housing 110 as it induces stagnation of the exhaust gas, which reduces the contact time between the exhaust gas and the cooling water pipe 123 and the hot water pipe 124. By extending it may serve as an advantage of increasing the heating efficiency.

Meanwhile, in one embodiment, an air vent 118 may be formed on one side of the outer housing 110 to discharge gas generated from the cooling water to the outside.

As described above, the unified GHP heat exchanger 100 of the present invention has a double structure of the outer housing 110 and the inner housing 120, so that heat exchange between exhaust gas and cooling water can be easily achieved. In particular, the shape of forming a thread on the outside of the cooling water pipe 123 to increase the contact area with the exhaust gas, and the exhaust gas and cooling water pipe 123, hot water pipe by stagnating the flow of exhaust gas using the baffle plate 128 The heat exchange efficiency can be maximized through a configuration that increases the contact time of 124.

Next, the overall flow of cooling water and exhaust gas through the unified GHP heat exchanger 100 will be described.

9 is a view showing the flow of cooling water and exhaust gas through the unified GHP heat exchanger 100 for heat recovery.

Referring to FIG. 9, first, high-temperature exhaust gas flows into the inner housing from a wet manifold connected to the engine (gas engine) and coolant discharged from the engine flows into the outer housing.

At this time, the high-temperature exhaust gas flows by being stagnated by a plurality of baffle plates in the inner housing, which results in a higher heating effect of the cooling water pipe and the hot water pipe in the inner housing.

In addition, the coolant introduced through the outer housing is heated while flowing through the heated coolant pipe, and since the heated coolant is at a relatively very low temperature compared to the heating temperature of the engine, it is supplied to the engine to cool the engine.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. You will understand that you can do it

100: unified GHP heat exchanger for heat recovery
110: outer housing
111: outer cooling water inlet
112: outer cooling water outlet
113: outer exhaust gas inlet
114: outer exhaust gas outlet
115: cone shape
116: hot water inlet
117: hot water outlet
118: air vent
120: inner housing
121: first bulkhead
122: second bulkhead
123: coolant piping
124: hot water piping
125: inner cooling water outlet
126: inner exhaust gas inlet
127: inner exhaust gas outlet
128: baffle board
128a: incision area
129: support rod

Claims (10)

An outer housing connected to the engine to allow exhaust gas and coolant to be introduced and discharged; And
It is provided inside the outer housing and is configured to flow through the cooling water flowing through the outer housing in the longitudinal direction, and the exhaust gas introduced through one side of the outer housing is configured to flow through the longitudinal direction. Includes; an inner housing configured to perform heat exchange between the cooling water and the exhaust gas,
One side of the outer housing includes a cooling water inlet through which cooling water is introduced, an external cooling water outlet through which the cooling water introduced through the cooling water inlet is discharged to the outside through the inner housing, an exhaust gas inlet through which exhaust gas is introduced, and the exhaust gas inlet. An exhaust gas outlet through which the exhaust gas introduced through passes through the inner housing and is discharged to the outside is provided,
The inner housing is provided in a cross-sectional direction from one end portion of the inner housing, a first partition wall having one or more holes formed therein, a second partition wall provided in a cross-sectional direction from the other end portion of the inner housing and having one or more holes, the first and Each of the holes provided in the second partition wall is connected to each other, one or more cooling water pipes formed to flow through the cooling water in a longitudinal direction and connected to the outer cooling water outlet, and the cooling water passing through each of the one or more cooling water pipes is external It includes an inner cooling water outlet discharged to the
A hot water inlet and a hot water outlet are further provided at one side of the outer housing, and a hot water pipe connected to the hot water inlet and the hot water outlet and positioned adjacent to the side surfaces of the at least one cooling water pipe is provided inside the inner housing. Characterized in that, a heat exchange device for unified GHP heat recovery.
delete delete The method of claim 1,
The cooling water pipe,
Heat exchanger for unified GHP heat recovery, characterized in that the thread is formed along the longitudinal direction on the side.
delete The method of claim 1,
The hot water pipe,
Heat exchanger apparatus for unified GHP heat recovery, characterized in that it is curved a plurality of times along the longitudinal direction of the cooling water pipe inside the inner housing.
The method of claim 1,
The hot water pipe,
A heat exchange device for unified GHP heat recovery, characterized in that it has a shape surrounding the outside of the cooling water pipe inside the inner housing.
The method of claim 1,
As any one of the inner end portions of the outer housing is formed in a cone shape protruding in the inward direction, the cooling water introduced through the cooling water inlet flows along the inner wall between the outer housing and the inner housing, and the cone shape Heat exchanger apparatus for unified GHP heat recovery, characterized in that concentrating while being collected in a direction toward the one or more cooling water pipes after hitting on.
The method of claim 1,
On the inside of the inner housing,
One or more baffles at regular intervals in the cross-sectional direction of the inner housing along the longitudinal direction of the cooling water pipe; And
At least one support rod for connecting and supporting the at least one baffle plate to each other; is provided,
Heat exchanger for unified GHP heat recovery, characterized in that the flow of the exhaust gas introduced through the exhaust gas inlet is interrupted by the one or more baffle plates, and the time that the exhaust gas stays in the inner housing increases. .
The method of claim 9,
The at least one baffle plate is provided with a cut-out area through which the exhaust gas passes; the cut-out area formed on the odd-numbered baffle plates and the cut-out area formed on the even-numbered baffle plates are opposite to each other. Heat exchanger device for unified GHP heat recovery, characterized in that the arrangement is shifted to face.

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