JP2005337336A - Liquefied gas evaporating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an occupied space of a liquefied gas evaporating device and reduce energy consumption during operation of the liquefied gas evaporating device. <P>SOLUTION: The liquefied gas evaporating device is provided with an evaporation part case 1 having an LP gas inflow port 2 into which LP gas (liquid phase) 4 is flowed and an LP gas outflow port 3 to which vaporized gas is flowed out, and with heat pipes 7 fixed by making heat release parts 7b contact with a wall face of the evaporation part case 1. Swelling parts 6 projecting toward inside of the case 1 are formed on a bottom face 5 of the evaporation part case 1. The heat release parts 7b of the heat pipes 7 are embedded in the swelling parts 6 and fixed. At the time of fixing, heat transfer is facilitated by press-fitting the heat release parts 7b of the heat pipes 7 and filling spaces between the heat release parts 7b of the heat pipes 7 and the wall face of the case 1 with solder. Heat collecting fins 8 are fixed to heat input parts 7a of the heat pipes 7 to effectively collect heat. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquefied gas vaporizer that vaporizes liquefied gas, and more particularly to a liquefied gas vaporizer that uses a heat pipe for heating the liquefied gas.

  As a liquefied gas vaporizer for vaporizing a liquefied gas, for example, there is an apparatus described in Patent Document 1 that vaporizes a liquefied gas by heating an evaporation pipe from outside with circulating air. An air temperature type liquefied gas vaporizer described in Patent Document 1 includes an evaporation pipe through which a liquefied gas flows, a housing that houses the evaporation pipe, and an air that is installed in the housing and circulates air in the housing. A blower that heats the pipe, and a partition that partitions the inside of the housing into an airtight chamber that houses the evaporation pipe and the blower and a circulation chamber that circulates the outside air, and penetrates the partition and passes through the air from the circulation chamber. A heat pipe type heat exchanger that reaches the closed chamber is provided at a position laterally deviated from above or above the evaporation pipe, and the heat pipe type heat exchanger is disposed in the air tight chamber through a portion located on the airtight chamber side of the heat pipe type heat exchanger. The air cooled through the evaporation pipe is heated with a heat medium in the heat pipe, and in the circulation chamber through a portion located on the circulation chamber side of the heat pipe heat exchanger. Heating the heat medium in the heat pipe with the air passing.

  In addition, when the heat of the air is applied to the liquefied gas in the evaporation pipe through the wall surface of the evaporation pipe to evaporate, fins are provided on the outer surface of the evaporation pipe as shown in FIG. 3 for efficient heat transfer. Is common.

JP 2003-314794 A (pages 3 to 4, FIG. 1)

  In the prior art, the heat collected in the heat pipe is transmitted to the air, and the heat of the air is given to the liquefied gas in the evaporation pipe through the wall surface of the evaporation pipe to evaporate. Therefore, in order to obtain the latent heat necessary for the evaporation of the liquefied gas in the evaporation pipe, it is necessary to increase the surface area of the evaporation pipe, in other words, to increase the length of the evaporation pipe and provide a space for circulating air. Therefore, the area occupied by the vaporizer has to be increased. Moreover, the electric power for operating a blower had to be utilized.

  An object of the present invention is to reduce the occupied space of a liquefied gas vaporizer and to reduce energy consumption during operation of the liquefied gas vaporizer.

  An object of the present invention is to provide an evaporator housing having a liquefied gas inlet through which liquefied gas flows in and a liquefied gas outlet through which vaporized liquefied gas flows out, and contact the heat radiating section with the wall surface of the evaporator housing. This is achieved by a liquefied gas vaporizer having a heat pipe fixed thereto.

  The evaporating section housing may not be a rectangular box shape, but may be a tubular shape in which a part of the conduit is enlarged.

  Further, it is preferable that a bulging portion protruding toward the inside of the housing is formed on the wall surface of the evaporation portion housing, and the heat radiating portion of the heat pipe is embedded and fixed in the bulging portion. At the time of fixing, heat transfer is facilitated by press-fitting the heat radiating portion of the heat pipe or filling the space between the heat radiating portion of the heat pipe and the housing wall with solder.

  It is desirable that heat collecting fins be fixed to the heat input portion of the heat pipe to efficiently collect heat. In the case where there is a device serving as a heat source, it is preferable that a heat collecting plate is fixed to the surface of the heat source and the heat input portion of the heat pipe is embedded in the heat collecting plate.

  According to the present invention, it is possible to reduce the installation space of the liquefied gas vaporizer and to reduce the energy consumption during operation.

(First embodiment)
Hereinafter, an LP gas vaporizer according to a first embodiment of the present invention will be described with reference to FIG. The LP gas vaporizer shown in FIG. 1 has the same structure as an evaporator section 1 where LP gas is evaporated, and an LP gas inlet 2 which is attached to the evaporator section 1 and into which LP gas (liquid phase) 4 flows. An LP gas outlet 3 attached to the evaporation unit housing 1 through which the evaporated LP gas (gas phase) flows out, and a bottom surface 5 of the evaporation unit housing 1 are formed so as to protrude toward the inside of the bottom surface (upward). A plurality of bulging portions 6, a plurality of heat pipes 7 in which heat radiating portions 7 b are embedded in the bulging portions 6, and the heat input portions 7 a are positioned in the direction away from the bottom surface 5 (downward), and heat input of the heat pipe 7 Heat collecting fins 8 that are press-fitted or soldered so as to easily transfer heat to the portion 7a.

  The heat pipe 7 is a metal pipe having a capillary structure on the inner wall of the pipe. The inside of the pipe is evacuated and then injected and sealed with a working fluid. The heat collecting fins 8 efficiently cool the surrounding heat. It has a structure to collect heat. Further, the heat dissipating part 7b is filled with solder between the heat dissipating part 7b and the wall surface of the bulging part 6 of the bottom surface 5 of the evaporating part housing 1 so that heat can be easily transferred to the LP gas in the evaporating part housing 1. The two are in close contact with each other through the solder. In addition, it is good also as a structure which makes both closely_contact | adhere by press-fitting the thermal radiation part 7b of the heat pipe 7 to the bulging part 6 of the bottom face 5 of the evaporation part housing | casing 1. FIG.

  As described above, a plurality of bulging portions 6 are formed on the bottom surface 5 that transfers heat to the LP gas so as to protrude toward the inside (upward) of the bottom surface. A plurality of fins (not shown) extending in the vertical direction are attached to the inner surface of the body so as to easily transfer heat to the LP gas. In addition, the bulging portion 6 has a shape and an arrangement that does not prevent the LP gas flowing in from the LP gas inlet 2 from flowing through the bottom of the evaporator housing 1 toward the LP gas outlet 3. ing.

  The LP gas vaporizer having the above configuration operates as follows. LP gas (liquid phase) flows into the evaporation unit housing 1 from the LP gas inlet 2 and is temporarily stored in the evaporation unit housing 1. In the heat input part 7a of the heat pipe 7, the internal working fluid evaporates by taking in the heat collected through the heat collecting fins 8 as latent heat of evaporation. The evaporated working fluid becomes a vapor flow and moves to the heat radiating portion 7b, and releases heat to the LP gas (liquid phase) 4 through the bottom surface 5 to be condensed and liquefied. The LP gas (liquid phase) 4 receives this heat (condensation heat of the working fluid), evaporates and becomes LP gas (gas phase) and flows out from the LP gas outlet 3.

  On the other hand, the hydraulic fluid condensed and liquefied by heat radiation flows down along the inner wall surface of the heat pipe 7, returns to the heat input portion 7a, and repeats the above cycle.

  According to the present embodiment, the heat collected by the heat pipe 7 is directly transferred to the LP gas (liquid phase) via the wall surface of the evaporation unit housing 1 (evaporation tube wall surface in Patent Document 1) without air. ), The space for circulating the air for heating the evaporation tube is unnecessary, and the size of the apparatus can be reduced. Further, since there is no air for heating the evaporation tube, there is an effect that a blower for circulating air is unnecessary and power for driving the blower is unnecessary.

(Second Embodiment)
Next, an LP gas vaporizer according to a second embodiment of the present invention will be described with reference to FIG. The second embodiment shown in FIG. 2 differs from the first embodiment shown in FIG. 1 in that the heat input portion 7a of the heat pipe 7 is replaced with the heat collecting fins 8 and is warmed by radiant heat or the like. 9 is embedded in the heat collecting plate 10 in close contact with the heat sink 10. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The heat input portion 7a of the heat pipe 7 is brought into close contact with the heat collecting plate 10 by press-fitting or soldering so that heat can be easily transmitted.

  The present embodiment can be applied when there is a heat source having a temperature higher than the outside air temperature. In this embodiment, the same effect as that of the first embodiment can be obtained.

  Note that, instead of closely attaching the heat collecting plate 10 to the outer surface 9 of the bulk storage tank, the heat collecting plate 10 as a protector of the bulk storage tank is brought into close contact, and the heat input portion 7a of the heat pipe 7 is embedded in the heat collecting plate 10. Good.

  In each of the above embodiments, the liquid phase LP gas in the bulk storage tank flows into the evaporation section casing 1 at the container pressure. However, the pressure may be temporarily reduced from the container pressure and flow into the evaporation section casing 1. .

  Each of the above embodiments has a configuration in which the evaporation unit housing 1 that temporarily stores the liquid phase LP gas is provided and the liquid phase LP gas is vaporized by the evaporation unit housing 1. Instead of a housing to store, it is also possible to enlarge the diameter of a part of a circular pipe with a circular cross section through which liquid phase LP gas flows, and to provide a bulging part 6 inside this pipe and to attach a heat radiating part of the heat pipe Good.

  Although each said embodiment vaporizes LP gas, it cannot be overemphasized that this invention is applicable similarly to what is called LNG.

FIG. 2 is a cross-sectional view showing the main configuration of the first embodiment of the present invention. It is sectional drawing which shows the principal part structure of the 2nd Embodiment of this invention. It is sectional drawing which shows the example of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Evaporation part housing | casing 2 LP gas inflow port 3 LP gas outflow port 4 LP gas (liquid phase)
5 bottom surface 6 bulging portion 7 heat pipe 7a heat input portion 7b heat radiating portion 8 heat collecting fin 9 outer surface of bulk storage tank 10 heat collecting plate

Claims (6)

  An evaporator housing having a liquefied gas inlet through which liquefied gas flows in and a liquefied gas outlet through which vaporized liquefied gas flows out, and a heat pipe fixed by bringing a heat radiating portion into contact with the wall surface of the evaporator housing And a liquefied gas vaporizer.   2. The liquefied gas vaporizer according to claim 1, wherein a bulging portion that protrudes toward the inside of the housing is formed on a wall surface of the evaporation portion housing, and the heat radiating portion of the heat pipe is formed on the bulging portion. A liquefied gas vaporizer characterized by being embedded.   3. The liquefied gas vaporizer according to claim 1, wherein solder is filled between a heat radiating portion of the heat pipe and a wall surface of the evaporation portion housing. 4.   The liquefied gas vaporizer according to any one of claims 1 to 3, wherein the evaporation section casing forms a part of a liquefied gas flow path.   The liquefied gas vaporizer according to any one of claims 1 to 4, wherein a heat collecting fin is fixed to a heat input portion of the heat pipe. The liquefied gas vaporizer according to any one of claims 1 to 4, wherein the heat input portion of the heat pipe is embedded in a heat collecting plate fixed to a surface of a heat source. Liquefied gas vaporizer.

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