JP2020183725A - Heating unit, heating unit attachment method, binary device comprising heating unit, and vessel comprising binary device - Google Patents

Abstract

To provide a technology capable of reducing necessity of designing a heating unit according to individual casings.SOLUTION: The present application discloses a heating unit that heats a working medium under heat exchange with supercharged air supplied from a supercharger to an engine. The heating unit comprises a heating part that is arranged in a casing forming a flow passage for the supercharged air from the supercharger to the engine, and a baffle member that suppresses the flow of the supercharged air that ends up passing through a gap between the heating part and the inner surface of the casing without passing through the heating part.SELECTED DRAWING: Figure 2

Description

The present invention includes a heating unit that evaporates an operating medium under heat exchange with supercharged air supplied from a supercharger to an engine, a method for attaching the heating unit, a binary device including the heating unit, and a binary device including the heating unit. For ships equipped with binary equipment.

A technique for obtaining electric power or other energy by utilizing the heat of supercharged air supplied from a supercharger to an engine is known (see Patent Document 1). In order to recover the heat of the supercharged air, the heating part (for example, the evaporating part, the preheating part or the superheating part) through which the working medium that exchanges heat with the supercharging air flows is the flow of the supercharging air from the supercharger to the engine. It is located in the road.

JP-A-2018-159375

The size and shape of the casing forming the flow path of the supercharged air from the supercharger to the engine are various. Conventionally, the heating unit is individually designed according to the size and shape of the casing in which the heating unit is mounted.

It is an object of the present invention to provide a technique for reducing the need to design a heating portion for each casing.

The heating unit according to one aspect of the present invention is configured to heat the working medium under heat exchange with the supercharged air supplied from the supercharger to the engine. The heating unit unit creates a gap between the heating unit arranged in the casing forming the flow path of the supercharged air from the supercharger to the engine and the inner surface of the heating unit and the casing. It is provided with a baffle member that suppresses the flow of the supercharged air that passes through.

According to the above configuration, since the baffle member is provided, the supercharged air can be efficiently flowed into the heating unit. In addition, by simply changing the size and shape of the baffle member, a large amount of supercharged air can flow into the heating section without changing the design of the heating section.

With respect to the above configuration, the baffle member may be arranged between the upstream end of the heating portion and the inner surface of the casing in the flow direction of the supercharged air.

According to the above configuration, since the baffle member narrows the void around the upstream end of the heating portion, the amount of supercharged air passing through the void adjacent to the upstream end of the heating portion is reduced, and a large amount of supercharged air is heated. It flows into the upstream end of the section. As a result, the heating unit can efficiently exchange heat with the supercharged air.

With respect to the above configuration, the baffle member may be composed of a flat plate member.

According to the above configuration, since the baffle member is composed of a flat plate member, it is easy to change the design or process the baffle member.

The mounting method according to another aspect of the present invention is used for mounting a heating unit having a heating unit that heats an operating medium under heat exchange with supercharging air supplied from a supercharger to an engine. .. The mounting method is to fix the heating portion in a casing forming a flow path of the supercharging air from the supercharger to the engine, and a gap between the inner surface of the casing and the heating portion. The baffle member is fixed in the casing so as to narrow the width of the baffle member or close the gap.

The binary device according to still another aspect of the present invention includes the heating unit described above. The binary device includes a pump that supplies the working medium to the heating unit, an expander that is driven by the expansion action of the working medium that is heated by the heating unit, and a generator that is driven by the expander. The working medium, which has worked in the inflator, is provided with a condenser.

The vessel according to still another aspect of the present invention is equipped with the above-mentioned binary device.

The techniques described above can reduce the need to design the heating section for individual casings.

It is a schematic diagram of a binary device. It is the schematic of the flow path around the engine. It is a schematic plan view of a casing. It is a schematic plan view of the evaporation part arranged in another casing. It is a schematic cross-sectional view of a baffle member. It is a schematic cross-sectional view of a baffle member. It is a schematic cross-sectional view of a baffle member.

An exemplary binary device 100 configured to recover heat from supercharged air supplied from the supercharger 101 to the marine engine 102 is described below. FIG. 1 is a schematic view of the binary device 100. FIG. 2 is a schematic view of the flow path around the engine 102. The binary device 100 will be described with reference to FIGS. 1 and 2.

The supercharger 101 is arranged at a position higher than that of the engine 102. An exhaust line 103 and an air supply line 106 are formed between the supercharger 101 and the engine 102. The air supply line 106 is used to guide the supercharged air generated by the supercharger 101 to the engine 102. The exhaust line 103 is used to guide the exhaust gas from the engine 102 to the supercharger 101.

The turbocharger 101 includes a turbine 104 connected to an exhaust line 103 and a compressor 105 driven by the turbine 104. The turbine 104 is driven by the expansion action of the exhaust gas flowing in through the exhaust line 103, and is configured to rotate the internal rotor. The compressor 105 is mechanically connected to the rotor of the turbine 104, and when the rotor of the turbine 104 rotates, it is configured to suck the outside air and compress the sucked air. The discharge port of the compressor 105 is connected to the upstream end of the air supply line 106. The downstream end of the air supply line 106 is connected to the intake port of the engine 102. The downstream portion of the air supply line 106 is composed of casings 121-127, as shown in FIG. The air supply line 106 forms a flow path that guides the supercharged air generated by the compression by the compressor 105 to the engine 102. The supercharged air flows downward through the air supply line 106 and is supplied to the engine 102. The binary device 100 is provided to recover the heat of the supercharged air flowing through the air supply line 106.

The binary device 100 is composed of a circulation path 110 through which an operating medium for recovering heat from supercharged air flows, a pump 111 arranged on the circulation path 110, an evaporating unit 112, an expander 113 and a condenser 114, and an expander 113. Includes a driven generator 115. The evaporation unit 112, the expander 113, and the condenser 114 are arranged so that the working medium discharged by the pump 111 passes through them in sequence. The evaporation unit 112 is arranged in the casing 122. The evaporation unit 112 is an example of a heating unit.

The circulation path 110 has an inflow pipe 118 and an outflow pipe 119 piped outside the casing 122, and manifolds 116 and 117 arranged inside the casing 122. The inflow pipe 118 is connected to the pump 111 and the manifold 116. The manifold 116 is arranged on the downstream side of the manifold 117 (that is, the lower side of the manifold 117) in the flow direction of the supercharged air. The inflow pipe 118 and the manifold 116 are piped to supply the working medium of the liquid phase discharged from the pump 111 to the evaporation unit 112. The outflow pipe 119 is connected to the manifold 117 and the expander 113. The outflow pipe 119 and the manifold 117 are piped to supply the working medium discharged from the evaporation unit 112 to the expander 113.

The evaporation unit 112 is configured to evaporate the working medium of the liquid phase discharged by the pump 111 in the casing 122 under heat exchange with supercharged air.

The expander 113 has an internal rotor (not shown) that rotates due to the expansion action of the working medium vaporized by the evaporation unit 112. The internal rotor is connected to the generator 115. Under the rotation of the internal rotor, the generator 115 produces electric power.

The condenser 114 is configured to heat-exchange the gas phase working medium discharged from the expander 113 with a cooling fluid (for example, seawater) supplied from the outside to generate a liquid phase working medium.

The casings 121 to 123 are continuously provided in a substantially vertical direction so as to form a flow path for guiding the supercharged air downward. The casing 121 has an upper portion 161 that forms a relatively narrow flow path, and a lower portion 162 that forms a flow path cross section that widens downward from the upper portion 161. The casing 122 is a substantially rectangular tubular member connected to the lower end of the casing 121. The casing 123 is a substantially rectangular tubular member connected to the lower end of the casing 122. These casings 122 and 123 form a flow path wider than the upper portion 161 of the casing 122.

The casing 124 is a member having an upward opening region wider than the opening region at the lower end of the casing 123. Reference numeral 128 is attached to the opening region of the casing 124 that overlaps the opening region at the lower end of the casing 123. Reference numeral 129 is attached to the opening region of the casing 124 adjacent to the opening region 128 in the substantially horizontal direction. The casing 124 is configured to guide the supercharged air flowing in from the opening region 128 in a substantially horizontal direction, and discharge the supercharged air flowing in the substantially horizontal direction upward through the opening region 129.

The casings 125 and 126 are substantially rectangular tubular members forming a flow path extending upward from the opening region 129 of the casing 124. The casings 125 and 126 are arranged adjacent to the casings 123 and 122 to form a flow path for guiding the supercharged air upward. The opening at the lower end of the casing 125 overlaps the opening area 129. The casing 126 is connected to the upper end of the casing 125.

The casing 127 is connected to the upper end of the casing 126 and is configured to guide the supercharged air passing through the casing 126 in a substantially horizontal direction. The downstream end of the casing 127 in the flow direction of the supercharged air is connected to the intake port of the engine 102.

An air cooler 107 is arranged in the casing 123 to cool the supercharged air supplied to the engine 102. The air cooler 107 is configured to exchange heat with the cooling fluid (for example, seawater) having a temperature lower than that of the supercharged air.

Next, the arrangement of the evaporation portion 112 in the casing 122 will be described with reference to FIGS. 2 and 3. FIG. 3 is a schematic plan view of the casing 122.

The evaporation unit 112 is arranged directly below the upper portion 161 of the casing 121 so that the supercharged air that has passed through the casing 121 directly hits the evaporating portion 112. The evaporation portion 112 is fixed to the inner surface of the casing 122 by welding or a fixture (for example, a rivet or a bolt). Alternatively, the evaporation unit 112 may be supported by a support member (not shown) fixed to the inner surface of the casing 122, and may be fixed at a predetermined position in the casing 122.

The evaporation unit 112 has a plurality of heat transfer panels 130 arranged in the casing 122. These heat transfer panels 130 are arranged at intervals in the substantially horizontal direction.

Each of these heat transfer panels 130 was connected to an inflow header 131 connected to the manifold 116, an outflow header 132 piped at a position separated upward from the inflow header 131, and an inflow header 131 and an outflow header 132. It has a plurality of heat transfer tubes 133. The inflow header 131 and the outflow header 132 extend in a direction substantially perpendicular to the alignment direction of the heat transfer panel 130. The inflow header 131 is arranged on the downstream side of the outflow header 132 in the flow direction of the supercharged air. The plurality of inflow headers 131 arranged in the alignment direction of the heat transfer panel 130 form the lower end of the evaporation portion 112 (the downstream end in the flow direction of the supercharged air and the upstream end in the flow direction of the working medium). The outflow header 132 is arranged on the upstream side of the inflow header 131 in the flow direction of the supercharged air. A plurality of outflow headers 132 arranged in the alignment direction of the heat transfer panel 130 are connected to the manifold 117. The plurality of heat transfer tubes 133 are arranged in a direction substantially perpendicular to the alignment direction of the heat transfer panel 130.

The upper end of the evaporation section 112 (the upstream end in the flow direction of the supercharged air and the downstream end in the flow direction of the working medium) is formed by a plurality of outflow headers 132. That is, the upper end of the evaporation unit 112 is formed at a height position where a plurality of outflow headers 132 are piped. The upper end of the evaporation unit 112 is between a length section between a pair of heat transfer tubes 133 located at both ends in one heat transfer panel 130 and a pair of outflow headers 132 located at both ends in the alignment direction of the heat transfer panel 130. It is an area corresponding to a rectangular area defined by the length interval of.

Since the evaporation unit 112 is arranged in the casing 122, the size of the evaporation unit 112 is smaller than the volume of the casing 122. The evaporation section 112 shown in FIG. 3 is arranged near one of the pair of inner surfaces of the casings 122 facing each other in the alignment direction of the heat transfer panels 130. Further, the evaporation unit 112 is arranged near the inner surface of the pair of inner surfaces of the casing 122 facing each other in the extending direction of the inflow header 131 and the outflow header 132, which are opposite to the manifolds 116 and 117. Therefore, a relatively wide void is formed between the inner surface on the side opposite to the inner surface and the evaporation portion 112. The above-mentioned manifolds 116 and 117 are arranged by utilizing the wide gap.

A baffle member 141 is arranged in the casing 122 in order to suppress the flow of supercharged air passing through the wide void formed between the evaporation portion 112 and the casing 122. The baffle member 141 and the evaporation unit 112 constitute the heating unit 140.

The baffle member 141 is composed of a substantially L-shaped flat plate member in a plan view. The baffle member 141 is arranged in the above-mentioned wide gap. Specifically, the baffle member 141 is fixed to the inner surface of the casing 122 at a height position substantially equal to the height position where the outflow header 132 is piped. The baffle member 141 may be welded to the inner surface of the casing 122, or may be fixed to the inner surface of the casing 122 by a fixture such as a rivet or a screw.

The inner surface of the casing 122 and the baffle member 141 form a substantially rectangular opening region 144 at the height position of the upper end of the evaporation portion 112. The opening region 144 is substantially complementary to the upper end of the evaporation portion 112, and the area of the opening region 144 is slightly larger than the upper end of the evaporation portion 112. That is, the size of the opening region 144 in the alignment direction of the heat transfer panels 130 is set to a value slightly larger than the distance between the pair of heat transfer panels 130 at both ends. The size of the opening region 144 in the alignment direction of the heat transfer tubes 133 is set to a value slightly larger than the distance between the pair of heat transfer tubes 133 at both ends in one heat transfer panel 130.

The baffle member 141 includes a first baffle member 142 fixed on the upper side of the manifold 117 and a second baffle member 143 extending from the end of the first baffle member 142 in the extending direction of the outflow header 132. There is. The first baffle member 142 is provided to suppress the inflow of supercharged air into the gap between the heat transfer tube 133 on the manifold 116, 117 side and the inner surface of the casing 122 on which the manifold 116, 117 protrudes. ing. Since the first baffle member 142 is located above the manifold 117, it may be used to support the manifold 117. In this case, the first baffle member 142 may be connected to the manifold 117 by using a fixture. The second baffle member 143 fills the gap between one of the heat transfer panels 130 at both ends of the plurality of heat transfer panels 130 and the inner surface of the casing 122 facing the heat transfer panel 130. It is provided to suppress the inflow of supply air. Since the outflow header 132 is piped in the vicinity of the second baffle member 143, the second baffle member 143 and the outflow header 132 may be connected by using a fixture. In this case, the evaporation unit 112 is supported by the baffle member 141.

Regarding the operation of the binary device 100 described above, the pump 111 sucks the liquid phase working medium from the condenser 114 and discharges the sucked working medium to the evaporation unit 112. The working medium of the liquid phase flows into the inflow header 131 of the evaporation unit 112 through the inflow pipe 118 and the manifold 116. Supercharged air is flowing downward in the casing 122 in which the evaporation unit 112 is arranged. The working medium flows upward through the heat transfer tube 133 in the direction opposite to the flow direction of the supercharged air, and exchanges heat with the supercharged air. As a result of heat exchange between the working medium and the supercharged air, the working medium is heated while the temperature of the supercharged air is lowered. The working medium is vaporized in the section from the inflow to the inflow header 131 to the outflow from the outflow header 132. The vaporized working medium sequentially flows into the manifold 117, the outflow pipe 119, and the expander 113. The working medium expands in the expander 113 and rotates the internal rotor of the expander 113. The working medium that has worked in the expander 113 is condensed in the condenser 114, and the condensed working medium is pumped again to the evaporation section 112 by the pump 111.

The supercharged air generated by the compressor 105 of the supercharger 101 is guided downward through the air supply line 106. Most of the supercharged air that has passed through the upper portion 161 of the casing 121 of the air supply line 106 flows into the upper end of the evaporation portion 112 through the opening region 144 directly below the upper portion 161 of the casing 121, and flows into the working medium in the evaporation portion 112. Efficiently exchange heat with. However, since the lower portion 162 of the casing 121 forms a flow path that gradually expands from the upper portion 161, a part of the supercharged air that has passed through the upper portion 161 of the casing 121 is directed toward the outer region of the opening region 144. It flows. Since the baffle member 141 obstructs the downward flow of the supercharged air outside the opening region 144, the supercharged air that has spread outward also flows into the upper end of the evaporation unit 112 through the opening region 144 and evaporates. Heat exchanges with the working medium within 112.

The supercharged air that has passed through the evaporation unit 112 flows into the casing 123 and is further cooled by the air cooler 107 arranged in the casing 123. The cooled supercharged air then sequentially passes through the casings 124 to 127 and is supplied to the engine 102.

The baffle member 141 of the present embodiment forms the opening region 144 at the height position of the upper end of the evaporation portion 112. The opening region 144 overlaps the upper end of the evaporation portion 112 in the vertical direction. The baffle member 141 allows the inflow of supercharged air to the upper end of the evaporation section 112, while obstructing the flow of supercharged air in the region outside the opening region 144. The baffle member 141 allows supercharged air to pass in the vicinity of each of the plurality of heat transfer panels 130. As a result, the heat of the supercharged air is efficiently transferred to the working medium flowing through the heat transfer panel 130. That is, the working medium is efficiently heated, while the supercharged air is efficiently cooled.

The evaporation section 112 can be arranged as it is in casings that differ in shape and / or size. That is, the evaporation unit 112 can be arranged in another casing without requiring a design change. FIG. 4 is a schematic plan view of the evaporation portion 112 arranged in the casing 150 having a horizontal cross section larger than that of the casing 122 shown in FIG.

The casing 150 differs from the casing 122 only in that it is larger than the casing 122 in the alignment direction of the heat transfer panels 130. Since the casing 150 is larger in the alignment direction of the heat transfer panels 130, the pair of spaces between the heat transfer panels 130 at both ends and the pair of inner surfaces of the casing 150 is wider. In order to suppress the flow of supercharged air passing through these spaces, a C-shaped baffle member 151 is used instead of the L-shaped baffle member 141.

The baffle member 151 has a first baffle member 142 and a second baffle member 143, similarly to the baffle member 141. In addition to these, the baffle member 151 extends from the end opposite to the end of the first baffle member 142 to which the second baffle member 143 is connected, in the extending direction of the outflow header 132. have. The third baffle member 146 suppresses the flow of supercharged air flowing through the internal space of the casing 150 due to the increase from the casing 122. Therefore, the effect of suppressing the flow of supercharged air that does not contribute to heat exchange can be obtained only by changing the design from the baffle member 141 to the baffle member 151 without changing the design of the evaporation unit 112.

The shape of the baffle member is determined according to the plan view shape of the gap formed between the evaporation unit 112 and the casing in which the evaporation unit 112 is housed. Therefore, if the flow of supercharged air that does not contribute to heat exchange is suppressed only at the portion corresponding to the first baffle member 142 or the second baffle member 143, the baffle member is formed by using a substantially rectangular flat plate. May be done.

It should be understood that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims. For example, several types of evaporation units may be prepared according to the size and shape of the casing.

With respect to the above-described embodiment, the height positions of the baffle members 141 and 151 substantially coincide with the height positions of the upper ends of the evaporation unit 112. However, as shown in FIG. 5, the baffle member 141 may be arranged below the upper end of the evaporation unit 112 (that is, downstream in the flow direction of the supercharged air). The baffle member 141 shown in FIG. 5 is fixed to the casing 122 at a position lower than the outflow header 132. The baffle member 141 is arranged closer to the outflow header 132 than the inflow header 131 forming the lower end of the evaporation portion 112. In this case, for the working medium that has passed through the manifold 116, a longer heat exchange section can be obtained as compared with the structure in which the baffle member 141 is arranged near the lower end of the heat transfer tube 133.

Regarding the above-described embodiment, the baffle member 141 is composed of a flat plate member. However, as shown in FIG. 6, a baffle member 153 that is long in the flow direction of the supercharged air is used. Although the baffle member 153 has a plan view shape substantially equal to that of the baffle member 141, it is larger than the baffle member 141 in the flow direction of the supercharged air and is columnar as a whole.

A tubular baffle member 154 may be used instead of the flat plate baffle member 141 (see FIG. 7). The baffle member 154 is composed of a square tubular member that narrows downward. The upper end of the baffle member 154 (upstream end in the flow direction of supercharged air) is fixed to the inner surface of the casing 121. The lower end of the baffle member 154 (downstream end in the flow direction of supercharged air) forms a substantially rectangular opening region substantially complementary to the upper end of the evaporation portion 112. The lower end of the baffle member 154 may be welded to the upper end of the evaporation portion 112. In this case, the supercharged air flows into the upper end of the evaporation unit 112 while forming a contraction in the baffle member 154. That is, the supercharged air is guided toward the evaporation section 112 by the baffle member 154 on the upstream side of the evaporation section 112 in the casing 122. The baffle member 154 suppresses the flow of supercharged air that passes through the gap formed between the evaporation unit 112 and the inner surface of the casing 122 without passing through the evaporation unit 112.

With respect to the above-described embodiment, the manifolds 116 and 117 are arranged inside the casing 122. However, if the evaporation section 112 is arranged in a small casing, the manifolds 116, 117 may be piped outside the casing.

Regarding the above-described embodiment, the evaporation unit 112 is used as the heating unit. However, the heating unit may be a preheating unit that heats the working medium of the liquid phase, or may be a superheating part that heats the working medium of the gas phase. The preheating section and the heating section may be arranged in the air supply line 106 together with the evaporation section 112. In this case, the preheating section is arranged below the evaporation section 112 (that is, downstream of the evaporation section 112 in the flow direction of the supercharged air (upstream of the evaporation section 112 in the flow direction of the working medium)). The superheating section is arranged above the evaporation section 112 (that is, upstream of the evaporation section 112 in the flow direction of the supercharged air (downstream of the evaporation section 112 in the flow direction of the working medium)). These can be mounted together with the baffle members in various shaped casings of the air supply line 106. The baffle member is formed so as to suppress the flow of supercharged air passing through the gap between these heating portions and the inner surface of the casing in which the heating portions are arranged. Therefore, the design of the heating unit itself does not have to be changed.

The technique of the above-described embodiment is suitably used for various applications that require waste heat from an engine mounted on a ship.

100 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Binary device 101 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Supercharger 102 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ Engine 111 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pump 112 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Evaporation part 113 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ Expander 114 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Condenser 140 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Heating unit 141 ・ ・ ・ ・ ・Baffle member 151, 153, 154 ... Baffle member

Claims (6)

A heating unit that heats the operating medium under heat exchange with the supercharged air supplied from the supercharger to the engine.
A heating unit arranged in a casing forming a flow path for the supercharged air from the supercharger to the engine, and a heating unit.
A heating unit that includes a baffle member that suppresses the flow of supercharged air that passes through a gap between the heating unit and the inner surface of the casing. The heating unit according to claim 1, wherein the baffle member is arranged between the upstream end of the heating unit and the inner surface of the casing in the flow direction of the supercharged air. The heating unit according to claim 1 or 2, wherein the baffle member is composed of a flat plate member. It is a method of attaching a heating unit having a heating unit that heats the working medium under heat exchange with supercharged air supplied from the supercharger to the engine.
Fixing the heating unit in the casing forming the flow path of the supercharged air from the supercharger to the engine, and
Mounting of a heating unit unit comprising fixing a baffle member in the casing so as to narrow the width of the gap between the inner surface of the casing and the heating part or to close the gap. Method. A binary device including the heating unit according to any one of claims 1 to 3.
A pump that supplies the working medium to the heating unit,
An expander driven by the expansion action of the working medium heated by the heating unit, and
The generator driven by the expander and
A binary device comprising the working medium with a condenser that has worked in the inflator. A ship equipped with the binary device according to claim 5.

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