JP7495780B2 - Vaporizer - Google Patents

Description

The technology disclosed here relates to vaporizers.

Patent Document 1 describes a liquefied gas vaporizer installed on ships and the like. This vaporizer is a so-called open rack type vaporizer. The open rack type vaporizer includes a heat exchange panel and a trough. The heat exchange panel is configured by arranging a plurality of heat transfer tubes in a first direction. The heat exchange panel vaporizes the liquefied gas inside each heat transfer tube. The heat exchange panels are arranged in parallel in a second direction perpendicular to the first direction. The trough extends in the first direction between adjacent heat exchange panels. The trough supplies the heat medium to the outer surface of the heat exchange panel. The heat medium in the trough overflows from the opening when the water level becomes higher than the edge of the opening at the top end of the trough.

The vaporizer described in Patent Document 1 is installed in a rocking location. The trough has a partition plate in the center that is higher than the edge of the opening. With this configuration, even if the trough is tilted in the second direction, the heat medium can overflow from the opening and supply the heat medium to the heat exchange panel.

Japanese Patent No. 6053389

The inside of the trough of the vaporizer described in Patent Document 1 is also divided into multiple sections in the first direction so that the heat medium can be supplied to the entire heat exchange panel even when the vaporizer is tilted in the first direction, i.e., the longitudinal direction of the trough.

However, there is a concern that if the vaporizer described in Patent Document 1 is tilted significantly in the first direction, the heat medium may be less likely to overflow or may not overflow at the end of the trough in the first direction.

The technology disclosed here makes it possible to supply heat medium to the heat exchange panel from the entire trough, even if the vaporizer is tilted in the longitudinal direction.

The technology disclosed here relates to vaporizers.

This vaporizer is
a heat exchange panel including a plurality of heat transfer tubes arranged in a first direction and configured to vaporize a liquefied gas flowing through each of the heat transfer tubes;
a trough disposed adjacent to the heat exchange panel in a second direction perpendicular to the first direction and configured to allow a heat medium to flow to an outer surface of the heat exchange panel;
The trough extends in the first direction, and a slit extending in the first direction is formed in a middle position in a height direction of a side wall of the trough facing the heat exchange panel,
The heat medium accumulated in the trough flows through the slits to the outer surface of the heat exchange panel.

In an evaporation device of this configuration, a slit extending in a first direction is formed at the midpoint in the height direction of the side wall of the trough. If the water level in the trough is higher than the slit, the heat medium accumulated in the truss flows through the slit to the outer surface of the heat exchange panel. The amount of heat medium supplied to the heat exchange panel corresponds to the top and bottom widths of the slit. The "midpoint" is any position between the top and bottom ends of the side wall, and the slit may be provided at an appropriate height so that the heat medium can be stably supplied to the heat exchange panel.

When the vaporizer is tilted in the first direction, one end of the trough in the first direction moves up and the other end moves down. At the end of the trough that has moved up, the difference in height between the top end of the trough's side wall and the water surface becomes smaller. However, this trough is not configured to overflow the heat medium. This trough supplies the heat medium to the heat exchange panel through a slit formed at the middle position in the height direction of the side wall. When the vaporizer is tilted in the first direction, if the water surface in the trough is higher than the slit, the heat medium flows through the slit to the outer surface of the heat exchange panel. At this time, the amount of heat medium supplied is an amount corresponding to the width of the slit from above to below. Therefore, the vaporizer of the above configuration can supply the heat medium evenly or approximately evenly over the entire first direction of the heat exchange panel even when tilted in the first direction.

The trough has a supply port that supplies the heat medium into the trough, and a baffle plate disposed between the supply port and the side wall,
The heat medium flows from the supply port to the slit through a position below the slit so as to bypass the baffle plate.

In this way, the heat medium supplied from the supply port into the trough is guided by the baffle plate through a position below the slits and into the space between the side wall and the baffle plate. While the heat medium bypasses the baffle plate, the heat medium spreads and flows in the first direction. The heat medium is distributed evenly or approximately evenly throughout the first direction within the trough. Whether the evaporator is horizontal or tilted in the first direction, the trough can flow the heat medium evenly or approximately evenly throughout the entire heat exchange panel.

The baffle plate is spaced apart from the side wall in the second direction and extends in the first direction,
The trough has a guide plate that divides the space between the side wall and the baffle plate into multiple spaces in the first direction, and distributes the heat medium flowing from the supply port to the space between the side wall and the baffle plate to each of the multiple spaces separated by the guide plate .

Here, the guide plate may completely separate two adjacent spaces that are sandwiched between the guide plate, or may not completely separate the two spaces, but may separate the two spaces so that they are partially connected to each other.

The heat medium that flows through a position below the slit and into the space between the side wall and the baffle plate is distributed evenly or approximately evenly to each of the multiple spaces separated by the guide plate. The trough can supply the heat medium to the heat exchange panel evenly or approximately evenly over the entire first direction.

In addition, when the vaporizer is tilted in the first direction, the guide plate prevents the heat medium from flowing in the first direction within the trough. Even when the vaporizer is tilted with respect to the first direction, the trough allows the heat medium to flow evenly or approximately evenly throughout the entire first direction of the heat exchange panel.

The trough may have a partition plate that divides the space within the trough into multiple spaces in the first direction.

Here, the partition plate may completely separate two adjacent spaces sandwiched between the partition plate, thereby preventing the heat medium from flowing in the first direction between the spaces sandwiched between the partition plate. Alternatively, the partition plate may separate the two spaces in such a way that the spaces are partially connected to each other, without completely separating the two spaces.

The trough is long in the first direction. When the vaporizer is tilted with respect to the first direction, the partition plate prevents or inhibits the heat medium from flowing in the first direction within the trough. The heat medium is inhibited from being biased to one side in the first direction within the trough. The trough, which is divided into multiple parts by the partition plate, can supply the heat medium evenly or approximately evenly throughout the entire first direction of the heat exchange panel.

The number of guide plates may be greater than the number of partition plates.

In other words, the partition plate divides the inside of the trough into a plurality of spaces, and the guide plate may further separate each of the plurality of spaces into a plurality of spaces. By providing both the guide plate and the partition plate in the trough, even if the vaporizer is tilted with respect to the first direction, the heat medium is supplied evenly or approximately evenly throughout the entire first direction of the heat exchange panel.

The trough has a trough body and a limiting plate that is detachably attached to the trough body and forms a part of the side wall,
The slit may be formed between the trough body and the limiting plate.

When the heat medium is seawater, debris or shells in the seawater may block part of the slits. By removing the restrictor plate from the trough body, debris can be easily removed. This makes maintenance of the vaporizer easier.

The vertical width of the slit may be adjusted by changing the mounting position of the limiting plate.

By changing the width of the slit above and below, it is possible to adjust the amount of heat transfer medium supplied from the trough to the heat exchange panel. In addition, seawater used as a heat transfer medium may contain a large amount of debris. By widening the width of the slit above and below depending on the operating environment of the vaporizer, it is possible to prevent debris from blocking the slit.

The vaporizer may be installed on a floating body on the water.

As mentioned above, this vaporizer can supply heat medium to the heat exchange panel from the entire trough even when tilted longitudinally, making it suitable as a vaporizer to be installed on floating bodies on water (including ships and moored floats, etc.).

As described above, the vaporizer can allow the heat medium to flow from the entire trough to the heat exchange panel even if the vaporizer is tilted.

FIG. 1 is a perspective view illustrating a schematic example of the overall configuration of a vaporizer. FIG. 2 is a perspective view illustrating the configuration of the trough. FIG. 3 is a plan view of the trough. FIG. 4 is a side view of the trough. FIG. 5 is a cross-sectional view of a trough, with a portion cut away. FIG. 6 is a diagram illustrating an example of a mounting structure for the limiting plate. FIG. 7 is a side view illustrating a state in which the vaporizer is tilted in the first direction. FIG. 8 is a cross-sectional view illustrating a state in which the vaporizer is tilted in the second direction.

Below, an embodiment of the vaporizer will be described with reference to the drawings. The vaporizer described here is an example. FIG. 1 shows a schematic diagram of the overall configuration of the vaporizer. The vaporizer is a so-called open rack vaporizer (ORV) 1. The ORV 1 is installed on a floating body on the water. The ORV 1 is mounted on, for example, a liquefied gas carrier. The ORV 1 converts the liquefied gas being transported into gaseous gas by exchanging heat with seawater as a heat medium. The ORV 1 may also be installed in an FSRU (Floating Storage and Regasification Unit) or an FPSO (Floating Production, Storage and Offloading).

The ORV1 is equipped with multiple heat exchange panels 2. In the illustrated example, there are five heat exchange panels 2. The number of heat exchange panels 2 may be any appropriate number. Although detailed illustration is omitted, each heat exchange panel 2 is constructed by arranging multiple heat transfer tubes in a first direction and joining adjacent heat transfer tubes to each other. The five heat exchange panels 2 are lined up in a second direction perpendicular to the first direction. Here, the first direction corresponds to the direction connecting the bow and stern of the ship on which the ORV1 is mounted. The second direction corresponds to the direction connecting the port and starboard sides of the ship.

A lower header tank 21 is disposed below each heat exchange panel 2. One lower header tank 21 is provided for each heat exchange panel 2. The lower header tank 21 extends in a first direction. The lower end of each heat transfer tube is connected to the lower header tank 21. The lower header tank 21 distributes liquefied gas to each heat transfer tube. The ends of the lower header tanks 21 aligned in the second direction are connected to an inlet manifold 22 extending in the second direction. The inlet manifold 22 distributes liquefied gas to each lower header tank 21.

The liquefied gas is supplied to each heat transfer tube through the inlet manifold 22 and the lower header tank 21, and vaporizes as it flows from bottom to top inside the heat transfer tube.

An upper header tank 23 is disposed above each heat exchange panel 2. One upper header tank 23 is provided for each heat exchange panel 2. The upper header tank 23 extends in the first direction. The upper ends of each heat transfer tube are connected to the upper header tank 23. The upper header tank 23 collects gas from each heat transfer tube. The ends of the upper header tanks 23 aligned in the second direction are connected to an outlet manifold 24 extending in the second direction. The outlet manifold 24 collects and sends out the gas from each upper header tank 23.

The liquefied gas may be supplied to each heat transfer tube through the upper header tank 23 and vaporized as it flows from top to bottom inside the heat transfer tube.

A trough 3 is provided on both sides of each heat exchange panel 2 in the second direction. The trough 3 stores seawater and allows the stored seawater to flow to the outer surface of the heat exchange panel 2. The trough 3 extends in the first direction near the top of the heat exchange panel 2.

Figure 2 is a perspective view illustrating the overall configuration of the trough 3. Figure 3 is a plan view of the trough 3, and Figure 4 is a side view of the trough 3. Figure 5 is a cross-sectional cutaway view of the trough 3. Note that Figure 5 illustrates only two heat exchange panels 2, and illustrates three troughs 3 corresponding to the two heat exchange panels 2. The trough 3 on the left end of Figure 5 corresponds to the trough 3 at the end of the ORV 1, which is disposed at the far left in Figure 1, and the trough 3 on the right end of Figure 5 corresponds to the trough 3 at the end of the ORV 1, which is disposed at the far right in Figure 1. The trough 3 disposed between adjacent heat exchange panels 2 has a cross-sectional shape like two troughs 3 disposed at the ends placed back to back.

The trough 3 has a trough body 4 and a limiting plate 5 attached to the trough body 4. The trough body 4 has a bottom wall 41, two side walls 42, and two end walls 43. The trough body 4 is open upward.

The bottom wall 41 extends in a first direction. The side walls 42 are connected to the edges of the bottom wall 41 in the second direction. Each side wall 42 extends in the first direction. The two side walls 42 are arranged facing each other in the second direction. Each side wall 42 faces the heat exchange panel 2. The end wall 43 is connected to the end of the bottom wall 41 in the first direction. The end wall 43 connects the two opposing side walls 42 to each other. The height of the end wall 43 is greater than the height of the side walls 42.

An edge portion 421 is provided at the upper end of the side wall 42. The edge portion 421 is formed by folding back the upper portion of the side wall 42 outward in the second direction. The edge portion 421 is inclined diagonally downward. The edge portion 421 is continuous over the entire side wall 42 extending in the first direction. Seawater in the trough 3 flows along the edge portion 421 toward the heat exchange panel 2.

The limiting plate 5 is located above the side wall 42, thereby constituting a part of the side of the trough 3. The limiting plate 5 extends in a first direction. Both ends of the limiting plate 5 in the first direction are bent. Both ends of the limiting plate 5 are fixed to the end wall 43. The limiting plate 5 is attached to the end wall 43 by bolts 51. The limiting plate 5 is detachable from the trough body 4.

A gap is provided between the limiting plate 5 and the side wall 42. As a result, a slit 52 extending in the first direction is formed in the side wall of the trough 3 at the midpoint in the height direction. More specifically, the slit 52 is located above the midpoint of the side wall of the trough 3, which has a total height from the upper end of the limiting plate 5 to the lower end of the side wall 42. The height position of the slit 52 is not limited to the example shown in the figure, and can be any appropriate position. The slit 52 is continuous from one end of the trough 3 to the other end in the first direction.

As shown in FIG. 6, the bolt holes 53 for mounting the limiting plate 5 are long in the vertical direction. The mounting position of the limiting plate 5 relative to the trough body 4 can be changed in the vertical direction. As shown in the left diagram of FIG. 6, when the limiting plate 5 is mounted on the bottom, the vertical width W1 of the slit 52 becomes narrower, and as shown in the right diagram, when the limiting plate 5 is mounted on the top, the vertical width W2 of the slit 52 becomes wider.

A partition wall 61 is disposed within the trough 3. The partition wall 61 extends in the first direction at the center position in the second direction. The partition wall 61 is in contact with the bottom wall 41. The height of the partition wall 61 is greater than the height of the end wall 43. The partition wall 61 divides the inside of the trough 3 into two in the second direction. As will be described in detail later, the partition wall 61 enables a stable supply of seawater to the heat exchange panels 2 on both sides of the trough 3 when the vaporizer 1 is tilted in the second direction.

As shown in FIG. 5, in the troughs 3 disposed at the ends in the second direction, i.e., the troughs 3 at the left end and the troughs 3 at the right end in FIG. 5, one of the side walls 42 is configured to be higher than the end wall 43. The side wall 42 that is higher than the end wall 43 performs the same function as the partition wall 61.

A plurality of partition plates 62 are arranged in the trough 3. The plurality of partition plates 62 are arranged at equal intervals in the first direction in each of the two spaces in the trough 3 divided by the partition wall 61. Each partition plate 62 is in contact with the bottom wall 41, the side wall 42, and the partition wall 61. The upper end of each partition plate 62 is located at the same height as the upper end of the end wall 43 or at approximately the same height. In the illustrated example, in each of the two spaces in the trough 3 divided by the partition wall 61, four partition plates 62 divide the trough 3 into five spaces in the first direction. Note that the number of divisions in the first direction by the partition plates 62 is not limited to five. The trough 3 may be divided into an appropriate number of spaces in the first direction. Also, the trough 3 does not need to be divided in the first direction. The partition plates 62 may be omitted.

The trough 3 has a supply port 71 that supplies seawater into the trough 3. The supply port 71 is provided individually in each of the total of 10 spaces separated by the bulkhead 61 and the partition plate 62. More specifically, the supply port 71 is provided in a distribution pipe 72 disposed in the trough 3. The distribution pipe 72 is composed of a pipe with both ends closed. The distribution pipe 72 is disposed extending in the first direction in each of the two spaces separated by the bulkhead 61. The distribution pipe 72 penetrates the partition plate 62. The supply port 71 provided at a predetermined position of the distribution pipe 72 is located in each space separated in the first direction. The supply port 71 is formed in the lower part of the distribution pipe 72 and opens downward.

Although detailed illustration is omitted, a supply pipe 73 is connected to each distribution pipe 72 (see also FIG. 1). Seawater supplied to each distribution pipe 72 through the supply pipe 73 is sprayed into the trough 3 through each supply port 71.

A baffle plate 81 is interposed between the supply port 71 and the side wall 42. The baffle plate 81 restricts the flow of seawater in the trough 3. Specifically, the baffle plate 81 is disposed parallel to the side wall 42 at a predetermined distance in the second direction from the side wall 42. The lower end of the baffle plate 81 is spaced apart from the bottom wall 41 of the trough 3. The lower end of the baffle plate 81 is located below the slit 52. As shown by the arrows in FIG. 5, the seawater flows to bypass the baffle plate 81. More specifically, the seawater flows from the supply port 71 through a position below the slit 52 into the space between the side wall 42 and the baffle plate 81.

Guide plates 82 are arranged in the space between the side wall 42 and the baffle plate 81. The guide plates 82 divide the space between the side wall 42 and the baffle plate 81 into multiple spaces in the first direction. In the illustrated example, in each space divided by the partition plate 62, four guide plates 82 are arranged at equal intervals in the first direction. The space is divided into five spaces by the guide plates 82. There are more guide plates 82 than partition plates 62.

Each guide plate 82 is fixed to the baffle plate 81 and to the limiting plate 5. The baffle plate 81 is fixed to the limiting plate 5 via the guide plate 82.

In the illustrated example, the lower end of the guide plate 82 is set at the same position as the lower end of the baffle plate 81. The guide plate 82 does not separate two adjacent spaces near the bottom wall 41 of the trough 3. Although not shown in the figure, the lower end of the guide plate 82 may abut against the bottom wall 41 of the trough 3.

As described above, seawater flows from the supply port 71 through a position below the slits 52 to the space between the side wall 42 and the baffle plate 81, bypassing the baffle plate 81. The guide plate 82 distributes the seawater evenly or approximately evenly to each space separated by the guide plate 82 in the space between the side wall 42 and the baffle plate 81.

The upper end of the guide plate 82 is inclined so as to connect the upper end of the baffle plate 81 and the upper end of the limiting plate 5. Unlike the illustrated example, the upper end of the guide plate 82 may be formed straight and horizontal.

The limiting plate 5, the baffle plate 81, and the guide plate 82 are fixed together to form an integrated unit. This increases the rigidity of the limiting plate 5 and the baffle plate 81, which are long in the first direction.

The limiting plate 5 is detachably attached to the trough body 4. When the limiting plate 5 is removed from the trough body 4, the limiting plate 5, the baffle plate 81, and the guide plate 82 can be removed from the trough body 4 (see the dashed lines in Figures 4 and 5). As described below, seawater accumulated in the trough 3 flows through the slits 52, but the slits 52 may become blocked by debris, shells, etc. contained in the seawater. By removing the limiting plate 5, the baffle plate 81, and the guide plate 82 from the trough body 4, the worker can easily remove debris, etc., accumulated in the slits 52. The removable configuration of the limiting plate 5, the baffle plate 81, and the guide plate 82 improves the maintenance performance of the trough 3.

The trough 3 configured as described above supplies seawater accumulated in the trough 3 to the outer surface of the heat exchange panel 2 through the slit 52 provided at the middle position of the side wall 42. As illustrated in FIG. 5, the seawater flows along the edge portion 421 toward the outer surface of the heat exchange panel 2. The slit 52 extends in the first direction with the same width. The trough 3 can supply seawater evenly or approximately evenly over the entire first direction of the heat exchange panel 2.

In this example configuration, the ORV1 is mounted on a ship, so when the ship pitches due to the influence of wind and waves, the ORV1 tilts in a first direction, and when the ship rolls, the ORV1 tilts in a second direction. As illustrated in Figure 7, when the trough 3 tilts in the first direction as the ORV1 tilts in the first direction (see θ in Figure 7), one end of the trough 3 in the first direction moves up and the other end moves down.

Conventional troughs allow seawater to overflow from the upper end of the side wall, so when the trough 3 tilts in the first direction and the upper end of the side wall moves upward relative to the water surface, the difference in height between the upper end of the side wall and the water surface becomes smaller, so seawater does not overflow or overflows more easily.

In contrast, the trough 3 configured as described above supplies seawater to the outer surface of the heat exchange panel 2 through a slit 52 provided at the middle position of the side wall 42. Even if the trough 3 is tilted in the first direction, as illustrated by the two-dot chain line in FIG. 7, if the height of the water surface WL in the trough 3 is higher than the slit 52, an amount of seawater corresponding to the vertical width of the slit 52 can be supplied to the heat exchange panel 2 over the entire first direction. This makes it possible to avoid a situation in which seawater is not supplied to part of the ORV 1, and the ORV 1 can vaporize the liquefied gas well.

Here, the ORV1 mounted on the ship operates, for example, while the ship is at anchor. The pitching angle of a ship at anchor is relatively small. The angle θ at which the trough 3 tilts in the first direction is, for example, about several degrees. As described above, the trough 3 is divided into multiple parts in the first direction by the partition plate 62. This prevents the water surface height in each space divided by the partition plate 62 from becoming lower than the slit 52, even if the trough 3 tilts in the first direction. The trough 3 can flow seawater to the heat exchange panel 2 over the entire first direction.

In addition, since multiple guide plates 82 are provided between the side wall 42 and the baffle plate 81, when the trough 3 is tilted in the first direction, the guide plates 82 prevent seawater from flowing in the first direction in the space between the side wall 42 and the baffle plate 81. The trough 3 can supply seawater evenly or approximately evenly over the entire first direction of the heat exchange panel 2.

In addition, by restricting the flow of seawater within the trough 3 using the baffle plate 81, the seawater supplied from the supply port 71 into the trough 3 can be distributed evenly or approximately evenly in the first direction within the trough 3. As a result of suppressing uneven distribution of seawater within the trough 3, the seawater flows evenly or approximately evenly through the slits 52 across the first direction of the heat exchange panel 2, whether the trough 3 is horizontal or inclined.

The guide plate 82 between the side wall 42 and the baffle plate 81 not only prevents seawater from moving when the trough 3 is tilted in the first direction, but also contributes to distributing the seawater that bypasses the baffle plate 81 and flows into the space between the side wall 42 and the baffle plate 81 evenly or approximately evenly in the first direction.

In addition, by providing the trough 3 with partition plates 62 that divide the trough 3, which is long in the first direction, into multiple spaces in the first direction, and guide plates 82 that further divide the space divided by the partition plates 62 into multiple spaces, seawater can be supplied evenly or approximately evenly over the entire first direction of the heat exchange panel 2, whether the trough 3 is horizontal or tilted in the first direction.

In addition, by changing the mounting position of the limiting plate 5 to change the size of the upper and lower widths of the slits 52, the amount of seawater supplied from the trough 3 to the heat exchange panel 2 can be easily adjusted.

In addition, by widening the top and bottom widths of the slits 52, it is possible to prevent debris and other objects contained in seawater from blocking the slits 52. By changing the top and bottom widths of the slits 52 according to the operating environment of the ORV1, it is possible to operate the ORV1 stably.

Furthermore, because the trough 3 is divided into two in the second direction by the high bulkhead 61, seawater can be supplied to the heat exchange panels 2 on both sides of the trough 3 when the ORV 1 tilts in the second direction, as shown in FIG. 8. The rolling angle of a ship at anchor tends to be larger than the pitching angle, but the trough 3 configured as described above can continue to supply seawater to the heat exchange panels 2 on both sides of the trough 3 even if the ship rolls at a relatively large angle.

Although not shown in the figure, the trough 3 located at the end in the second direction can supply seawater to the heat exchange panel 2 on the side of the trough 3 by using the high side wall 42 when the ORV 1 is tilted in the second direction. The high side wall 42 performs the same function as the bulkhead 61.

The configuration of the vaporizer 1 is not limited to the configuration of the ORV 1 described above. For example, the mechanism for supplying seawater to each space in the trough 3 separated by the bulkhead 61 and/or the partition plate 62 may be configured in a manner other than providing the distribution pipe 72 described above in the trough 3. For example, a supply pipe may be connected individually to each space in the trough 3.

The number of guide plates 82 is not limited to the configuration example described above. Any appropriate number of guide plates 82 may be used. Also, guide plates 82 may be omitted.

Furthermore, the baffle plate 81 can be omitted.

The slit 52 does not have to be continuous from one end of the trough 3 to the other end in the first direction. The slit may be divided into multiple parts in the first direction.

1 ORV (evaporation device)
2 Heat exchange panel 3 Trough 4 Trough body 42 Side wall 5 Limiting plate 52 Slit 62 Partition plate 71 Supply port 81 Baffle plate 82 Guide plate

Claims (6)

a heat exchange panel including a plurality of heat transfer tubes arranged in a first direction and configured to vaporize a liquefied gas flowing through each of the heat transfer tubes;
a trough disposed adjacent to the heat exchange panel in a second direction perpendicular to the first direction and configured to allow a heat medium to flow to an outer surface of the heat exchange panel;
The trough extends in the first direction, and a slit extending in the first direction is formed in a middle position in a height direction of a side wall of the trough facing the heat exchange panel,
The trough has a supply port that supplies the heat medium into the trough, and a baffle plate disposed between the supply port and the side wall,
The baffle plate is spaced apart from the side wall in the second direction and extends in the first direction,
the trough includes a guide plate that divides a space between the side wall and the baffle plate into a plurality of spaces in the first direction, and distributes the heat medium flowing from the supply port into the space between the side wall and the baffle plate to each of the plurality of spaces divided by the guide plate;
An evaporator in which the heat medium accumulated in the trough flows from the supply port to the slit through a position below the slit, bypassing the baffle plate, and then flows through the slit to the outer surface of the heat exchange panel. 2. The vaporizer according to claim 1,
The trough has a partition plate that divides a space within the trough into multiple spaces in the first direction. 2. The vaporizer according to claim 1,
The trough has a partition plate that divides a space in the trough into a plurality of spaces in the first direction,
The number of the guide plates is greater than the number of the partition plates. The vaporizer according to any one of claims 1 to 3,
The trough has a trough body and a limiting plate that is detachably attached to the trough body and forms a part of the side wall,
The slit is formed between the trough body and the limiting plate. 5. The vaporizer according to claim 4,
A vaporizer in which the vertical width of the slit is adjusted by changing the mounting position of the limiting plate. The vaporizer according to any one of claims 1 to 5,
The vaporizer is an vaporizer installed on a floating body on water.

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