JP2007204969A - Building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take advantage of water which is obtained by the decomposition of a natural gas hydrate (NGH) serving as a fuel source for gas equipment in a building. <P>SOLUTION: This building 10 comprises a building structure 11a which includes a plurality of dwellings, and a gas supply system 11b for supplying gas energy to the building structure 11a. The gas supply system 11b comprises: an NGH tank 12 in which the NGH is stored; an NGH decomposition unit 13 which decomposes the NGH supplied from the NGH tank 12, so as to generate fuel gas and the water; fuel piping 14 for distributing the fuel gas to respective dwelling units in the building structure 11a; power generation equipment 15 which is driven by the fuel gas; a water storage tank 16 in which the water decomposed by the NGH decomposition unit 13 is temporarily stored; a pump 17 for pumping out the water from the water storage tank 16; and a water discharge device 18 for discharging the water which is pumped out by the pump 17. The water in the water storage tank 16 is pumped out by the pump 17, and sprinkled from the water discharge device 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a building having a gas facility, and more particularly to a building having a gas facility that uses natural gas hydrate (NGH) as a fuel.

In recent years, natural gas hydrate (NGH) has attracted attention as a fuel in consideration of the global environment (see Non-Patent Document 1). NGH is a clathrate hydrate in which natural gas molecules (guests) mainly composed of methane, ethane, propane, etc. are incorporated into a cluster of water molecules, and is about 170 under an atmospheric pressure environment of minus 20 ° C. Double the gas can be stored. As gas energy, liquefied natural gas (LNG) is well known, but since LNG is manufactured and stored at an extremely low temperature of minus 162 ° C, NGH is used in the entire system of manufacturing, transportation, storage, and gasification. There are many advantages over LNG. NGH is also attracting attention as clean energy because it emits less carbon dioxide and air pollutants than gasoline.
Mitsui Engineering & Shipbuilding Co., Ltd., “Natural Gas Hydrate (NGH)-Mitsui Engineering & Shipbuilding”, [online], [searched January 16, 2006], Internet <URL: http://www.mes.co.jp/mes_technology /NGH.html>

  A gas facility using NGH as a fuel requires an NGH decomposing apparatus and uses methane gas or the like obtained by NGH decomposition as a fuel. However, when NGH is decomposed, a large amount of water is produced as a secondary. Since the generation rate of water is about 80% by volume ratio with respect to NGH, a considerably large amount of water is generated. However, the water generated in this way is difficult to be used as domestic water, and conventional buildings have no way to use this water, so they have to be drained as they are.

  On the other hand, large buildings such as apartment houses (condominiums), hospitals, hotels, commercial buildings, factories, and warehouses become extremely hot both inside and outside the building in the summer. Although the inside of a building can be kept at an appropriate temperature by an air conditioner, there is a problem that the utility cost increases when the air conditioner is operated. In addition, although the inside of the building can be kept at an appropriate temperature, the outside remains at a very high temperature, so the cooling effect inside the building is not sufficient, and there is a risk of burns when touching the outer wall surface of the building.

  Therefore, the objective of this invention is providing the building which can utilize the water obtained by decomposition | disassembly of NGH used as the fuel source of gas equipment.

  The above objects of the present invention include an NGH tank in which NGH is stored, an NGH decomposition apparatus that decomposes NGH supplied from the NGH tank to generate fuel gas and water, a gas facility that uses the fuel gas, It is achieved by a building comprising a water discharge mechanism for discharging the water to the roof or outer wall surface of the building.

  In the present invention, it is preferable that the water discharge mechanism discharges the water using an NGH decomposition pressure by the NGH decomposition apparatus. According to this, water can be discharged without using a pump or the like. The water discharge mechanism preferably includes a water storage tank, a pump that pumps out water in the water storage tank, and a water discharge device that discharges water pumped out by the pump. It is particularly preferred that it is attached to According to this, the water produced | generated by the NGH decomposition | disassembly apparatus can be stored temporarily, and the stored water can be discharged appropriately.

  In the present invention, it is preferable that the roof or the outer wall surface of the building is coated with a photocatalyst. According to this, evaporation of water can be promoted by the superhydrophilic effect of the photocatalyst, and the heat dissipation effect can be enhanced.

  In this invention, it is preferable to further provide the power generation equipment using the said fuel gas. According to this, it is possible to supply electric power of a system different from that for commercial use, and it can be used as normal or emergency power, as well as an electric heater for decomposing NGH and a power source for a pump for pumping water. Can be used.

  According to the present invention, the fuel gas obtained by the NGH decomposition apparatus decomposing NGH is used for gas equipment such as a gas stove, and the cold water obtained from the NGH decomposition apparatus is discharged to the rooftop or outer wall surface of the building. The entire building can be cooled by the heat of vaporization of cold water. Thereby, the problem that a building becomes high temperature is solved, the inside of a building can be kept at a suitable temperature without relying only on an air conditioner, and reduction in utility costs can be achieved.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram showing a configuration of a building 10 according to a preferred embodiment of the present invention. The building 10 of this embodiment is an example of a high-rise large apartment house, and a plurality of houses (doors) are provided on each floor.

  As shown in FIG. 1, the building 10 includes a building structure 11a including a plurality of residences and a gas supply system 11b for supplying gas energy to the building structure 11a. The gas supply system 11b may be provided in the building structure 11a, or may be provided as a building different from the building structure 11a. The gas supply system 11b includes an NGH tank 12 in which NGH is stored, an NGH decomposition apparatus 13 that decomposes NGH supplied from the NGH tank 12 to generate fuel gas and water, and fuel gas in the building structure 11a. A fuel pipe 14 for distributing to each house, a power generation facility 15 driven by fuel gas, a water storage tank 16 for temporarily storing water decomposed by the NGH decomposition device 13, and a pump 17 for taking out water from the water storage tank 16 And a water discharger 18 for discharging water pumped out by the pump 17. In addition, although the building 10 of this embodiment is provided with the various component which a normal building has, illustration is abbreviate | omitted here. The NGH in the NGH tank 12 is appropriately replenished by, for example, patrol replenishment with an NGH transport vehicle.

  FIG. 2 is a schematic diagram showing the configuration of the NGH decomposition apparatus 13.

  As shown in FIG. 2, the NGH decomposition apparatus 13 heats the NGH decomposition tank 21 using an NGH decomposition tank 21 for decomposing NGH supplied from the NGH tank 12 and fuel gas obtained from the NGH decomposition tank 21. And a controller 23 for controlling the heater 22. The fuel gas generated in the NGH decomposition tank 21 is discharged from the gas discharge port 21a of the NGH decomposition tank 21, and the water generated in the NGH decomposition tank 21 is discharged from the drain port 21b. The water obtained at this time is cold water, and the water temperature is lower than room temperature. In addition, you may provide the water temperature regulator which adjusts the temperature of the water obtained with the NGH decomposition | disassembly tank 21. FIG.

  As shown in FIG. 1, the fuel gas discharged from the gas discharge port 21a is supplied to each door through the fuel pipe 14, and is used as fuel for various gas facilities 11e such as a water heater, a gas stove, and a heater. The fuel gas is also supplied to the power generation facility 15. A gas engine, a gas turbine, or the like can be used for the power generation facility 15. The electric power generated by the power generation facility 15 is supplied to each house via the electrical wiring 19. Further, the water discharged from the drain port 21 b is supplied to the water storage tank 16 and temporarily stored in the water storage tank 16. Water in the water storage tank 16 is pumped out by a pump 17 as necessary, and is sprayed from the water discharger 18 through the water distribution pipe 20 to the roof (including the roof) of the building and the outer wall surface. The water discharger 18 is provided on the rooftop 11c so that water can spread throughout the building, and the number of water dischargers 18, the direction of water discharge, the water discharge method, and the like are determined. As the water discharger 18, a watering nozzle, a sprinkler, etc. can be mentioned, for example. In order to efficiently wet the rooftop 11c and the outer wall surface 11d of the building, it is preferable to provide a water discharger 18 at the end of the rooftop 11c of the building 10. If it does in this way, water can be sprinkled to both the rooftop 11c and the outer wall surface 11d with as few water dischargers 18 as possible. The water discharged from the vicinity of the rooftop 11c of the building is vaporized on the rooftop 11c and is vaporized while flowing downward along the outer wall surface 11d, and the entire building can be cooled by this heat of vaporization.

  In this embodiment, it is preferable to coat the photocatalyst on the roof 11c and the outer wall surface 11d of the building structure 11a. When the photocatalyst is coated, evaporation of water can be promoted by the superhydrophilic effect of the photocatalyst, and the heat dissipation effect can be enhanced. Furthermore, antifouling effect can be expected. Here, the photocatalyst is not particularly limited as long as it causes a photocatalytic reaction by ultraviolet rays or visible light. In addition to titanium oxide, zinc oxide, tin oxide, lead oxide, ferric oxide, dibismuth trioxide, three Examples thereof include tungsten oxide and strontium titanate. Among these, anatase type titanium oxide having excellent photocatalytic activity is preferable. Moreover, as a binder of a photocatalyst coating material, the inorganic binder excellent in durability is preferable, and especially alkoxysilane and colloidal silica are preferable.

  As described above, according to the present embodiment, since the cold water obtained from the NGH decomposition apparatus 13 is discharged to the rooftop or outer wall surface of the building, the entire building can be cooled by the heat of vaporization of the cold water. Thereby, the problem that a building becomes high temperature is solved, the inside of a building can be kept at a suitable temperature without relying only on an air conditioner, and reduction in utility costs can be achieved.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention, and these are also included in the scope of the present invention. Needless to say.

  For example, in the above embodiment, the water in the water storage tank 16 is pumped out by the pump 17 and sent to the water discharger 18. However, the water storage tank 16 and the pump 17 are not essential, and the high pressure obtained from the NGH decomposition device 13. If the water is used as it is, the water storage tank 16 and the pump 17 can be omitted.

  Moreover, in the said embodiment, although the heater 22 which heats the NGH decomposition | disassembly tank 21 using the fuel gas obtained from the NGH decomposition | disassembly tank 21 is used, it is also possible to use the electric heater which generate | occur | produces with electric power. Further, exhaust heat from a power generation apparatus such as a gas engine can be used, and exhaust heat generated by the power generation apparatus and other heat sources such as an electric heater can be used in combination.

  Moreover, in the said embodiment, although the case where cold water was discharged was demonstrated, warm water can also be discharged. In that case, a heater for heating the cold water pumped from the water storage tank 16 is required. When the hot water is discharged, it is possible to melt the snow accumulated on the rooftop or in front of the entrance, or to melt the frozen window glass.

  The building to which the present invention is applied is not particularly limited and can be applied to a general small house. However, taking into account the cost of introducing equipment such as an NGH decomposing apparatus, It is preferably applied to large facilities such as hospitals, hotels, commercial buildings, factories, and warehouses.

It is a schematic diagram which shows the structure of the building 10 which concerns on preferable embodiment of this invention. 3 is a schematic diagram showing a configuration of an NGH decomposition apparatus 13. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Building 11a Building structure 11b Gas supply system 11c Building rooftop 11d Building outer wall surface 11e Gas equipment 12 NGH tank 13 NGH decomposition device 14 Fuel piping 15 Power generation equipment 16 Water storage tank 17 Pump 18 Water discharger 19 Electric wiring 20 Water distribution pipe 21 NGH decomposition tank 21a Gas discharge port 21b Drain port 22 Electric heater 23 Controller

Claims (6)

An NGH tank in which NGH is stored;
An NGH decomposition apparatus that decomposes NGH supplied from the NGH tank to generate fuel gas and water;
Gas equipment using the fuel gas;
A building comprising: a water discharge mechanism for discharging the water to the roof or outer wall surface of the building.   The building according to claim 1, wherein the water discharge mechanism discharges the water using an NGH decomposition pressure by the NGH decomposition apparatus.   2. The building according to claim 1, wherein the water discharge mechanism includes a water storage tank, a pump that pumps out water in the water storage tank, and a water discharger that discharges water pumped out by the pump. .   The building according to claim 2 or 3, wherein the water discharger is attached to an end of the roof of the building.   The building according to any one of claims 1 to 4, wherein a roof or an outer wall surface of the building is coated with a photocatalyst. The building according to any one of claims 1 to 5, further comprising a power generation facility using the fuel gas.

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