JP4543528B2 - Exhaust duct cooling system for mobile power supply cars - Google Patents

Exhaust duct cooling system for mobile power supply cars Download PDF

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Publication number
JP4543528B2
JP4543528B2 JP2000281449A JP2000281449A JP4543528B2 JP 4543528 B2 JP4543528 B2 JP 4543528B2 JP 2000281449 A JP2000281449 A JP 2000281449A JP 2000281449 A JP2000281449 A JP 2000281449A JP 4543528 B2 JP4543528 B2 JP 4543528B2
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Prior art keywords
exhaust duct
exhaust
gas turbine
package
mobile power
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JP2002089284A (en
Inventor
博史 佐上
重雄 荻原
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IHI Corp
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IHI Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/30—Exhaust heads, chambers, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/14—Casings modified therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/90—Mounting on supporting structures or systems

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明はガスタービンと発電機をトラックに載置した移動電源車の排気ダクトの冷却装置に関する。
【０００２】
【従来の技術】
近年、図３に示すような、荷台の上にガスタービンにより駆動される発電機を設置した自動車（移動電源車）が考案されている。図３に示す移動電源車Ｔは、ガスタービンＧＴと、このガスタービンＧＴの動力によって駆動する発電機ＧＥとを備えており、ガスタービンＧＴと発電機ＧＥとは減速機ＲＧを介して接続されている。これら、ガスタービンＧＴ、減速機ＲＧ、発電機ＧＥは本体車両の荷台Ｆに設けられた架台Ｋ上に設置されており、パッケージＣ内部に配置された構成となっている。ガスタービンＧＴには、このガスタービンＧＴに対してパッケージＣ外部の空気を給気するガスタービン用給気ダクト１１が接続されているとともに、ガスタービンＧＴからの排気をパッケージＣの後部から外部に排気するガスタービン用排気ダクト１２が接続されている。なお、このガスタービン用給気ダクト１１にはガスタービン用給気消音器１１ａが、ガスタービン用排気ダクト１２にはガスタービン用排気消音器１２ａが設けられている。
【０００３】
パッケージＣの所定の位置にはこの収容壁Ｃ内部に対して外部空気を給気可能な給気口１３と、パッケージＣ内部の気体を外部に排気する排気装置１４とが設けられている。この排気装置１４には排気用ファン１４ａが設けられており、この排気用ファン１４ａを駆動することによって、パッケージＣ内部が換気されるようになっている。１５は前面扉で、１対の扉が観音開きになるように枢支されている、１６はＧＴ排気扉、１７は換気排気扉であり、共に１対の扉が観音開きになるように枢支されている。これらの扉は、発電しているときは開いており、車の移動中や発電しないで停止しているときには閉まっている。１８は運転席である。排気用消音器１２ａはガスタービンＧＴの排気側の消音を図るもので、本例では図２に示すようなスプリット型ダクト消音器を使用している。スプリット型ダクト消音器は図中のａの部分が空気通路、ｂの部分がグラスウールなどの吸音材であり、ａとｂの境界はパンチングメタルを使用している。
【０００４】
【発明が解決しようとする課題】
ガスタービンの排気温度は最高６３０℃になり、排気ダクト１２外面の温度は重量、スペースの問題上断熱材を多量に使用できないため１００℃を越える温度になってしまう。一方、パッケージＣは重量を軽くするためアルミ材を使用しているので、耐熱温度が低く、排気ダクトからの輻射熱により高温になると損傷を起こすうえ、安全上も問題である。排気ダクト１２外面にガラスウールなどの断熱材を貼付することにより、かかる損傷を防ぐこともできるが、十分な性能の断熱材を貼付すると、排気ダクトの重量および大きさが過大になってしまう他、断熱材の分だけコストアップになってしまう。
【０００５】
本発明の従来技術のかかる問題点に鑑み案出されたもので、排気ダクトにガラスウールなどの断熱材の使用量を大幅に削減しまたは断熱材を使用することなしにパッケージの損傷を防ぐことができ、かつ、安全性を高めることの出来る排気ダクト冷却装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記目的を達成するため本発明の排気ダクトの冷却装置は、トラックの荷台に設置したパッケージ内にガスタービンと発電機を載置した移動電源車において、ガスタービン排気口を囲繞して設けられ、ガスタービンの排気をパッケージ後部から上方に排出する排気ダクトとパッケージ内面との間に隙間を設け、排気ダクト付近のパッケージ床面に冷却空気の吸入口を設け、排気ダクト上端とパッケージ上面の開口との間に冷却空気の排出口を設け、排気ダクトとパッケージ内面との隙間に自然流を起こさせるようにしたものである。
【０００７】
次に本発明の作用を説明する。排気ダクトとパッケージ内面との間に隙間を設け、隙間の上下に冷却空気の排出口と吸入口を設けたので、隙間内の空気が高温の排気ダクトにより暖められると上昇流が生じ、常に内部の空気が入れ替わる。
さらに、排気ダクトからのガスタービン排気の強い上昇流により、冷却空気の排出口においてエジェクタ効果が生じるので、上記冷却空気の上昇流はさらに強まる。
【０００８】
このような冷却空気の上昇流により排気ダクトが冷却され、外面の温度が低下して、排気ダクトからの輻射熱量が減少する。排気ダクトからの輻射熱により排気ダクトを囲繞するパッケージの温度も上昇するが同様に冷却空気の上昇流により冷却される。したがって、パッケージの温度は低く保たれ、損傷を起こす虞はなく、安全性も高まる。
【０００９】
【発明実施の形態】
以下本発明の１実施形態について図面を参照しつつ説明する。図１は図３のＡ−Ａ矢視図である。図１、図３に示すように、移動電源車Ｔはトラックの荷台Ｆに設置したパッケージＣ内にガスタービンＧＴと発電機ＧＥが載置されている。パッケージＣの後部にはガスタービンＧＴの排気をパッケージＣ外に排出する排気ダクト１２が設けられている。排気ダクト１２は、図１に示すようにガスタービン排気口４を囲繞して設けられ、ガスタービンＧＴの排気５をパッケージＣ後部から上方に排出する。ガスタービンＧＴの排気５は、ガスタービン排気口４から一旦、下方に流れ、Ｕターンして上方に流れる。排気ダクト１２上部にはガスタービン用排気消音器１２ａが設けられており、ガスタービンＧＴの排気５は消音器１２ａを通って上方に排出される。排気ダクト１２は、パッケージＣの床面Ｃａに立設された支柱７により支持されている。排気ダクト１２とパッケージＣ内面との間に隙間１が設けられている。隙間１は７０〜１００ｍｍ程度が好ましい。２は排気ダクト１２付近のパッケージＣの床面Ｃａに設けられた冷却空気６の吸入口で、隙間１の下方に設けられている。３は排気ダクト１２上端とパッケージＣ上面の開口Ｃｂとの間に設けられた冷却空気６の排出口で、隙間１の上方に設けられている。
【００１０】
次に本実施形態の作用を説明する。排気ダクト１２とパッケージＣ内面との間に隙間１を設け、隙間１の上下に冷却空気６の排出口３と吸入口２を設けたので、隙間１内の空気が高温の排気ダクト１２により暖められると上昇流が生じ、常に内部の空気が入れ替わる。さらに、排気ダクト１２からのガスタービン排気５の強い上昇流により、冷却空気６の排出口３においてエジェクタ効果が生じるので、上記冷却空気６の上昇流はさらに強まる。
【００１１】
このような冷却空気６の上昇流により排気ダクト１２が冷却され、外面の温度が低下して、排気ダクト１２からの輻射熱量が減少する。排気ダクト１２からの輻射熱により排気ダクトを囲繞するパッケージＣの温度も上昇するが同様に冷却空気６の上昇流により冷却される。したがって、パッケージＣの温度は低く保たれ、損傷を起こす虞はなく、安全性も高まる。
【００１２】
本発明は以上述べた実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。
【００１３】
【発明の効果】
以上述べたように本発明の移動電源車の排気ダクト冷却装置は、ガスタービンの排気ダクトを、排気ダクト外周に冷却空気の自然流を起こさせて冷却するようにして、排気ダクトを囲繞するアルミニウム製のパッケージの熱による損傷を防止するようにしたので、パッケージの損傷を防止するための断熱材が不要であり、そのコストが削減できるとともに、移動電源車の全体重量を軽減できるなどの優れた効果を有する。なお、パッケージはアルミニウム製でなく鋼板性であってもよいが、温度低下により安全性が高まる。
【図面の簡単な説明】
【図１】本発明の移動電源車の排気ダクト冷却装置の背面から見た断面図である。
【図２】スプリット型ダクト消音器の斜視図である。
【図３】移動電源車の側面図である。
【符号の説明】
１ 隙間
２ 吸入口
３ 排出口
４ ガスタービンの排気口
５ ガスタービンの排気
６ 冷却空気
Ｃ パッケージ
Ｃａ パッケージの床面
Ｔ 移動電源車
ＧＴ ガスタービン
ＧＥ 発電機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling device for an exhaust duct of a mobile power supply vehicle in which a gas turbine and a generator are mounted on a truck.
[0002]
[Prior art]
In recent years, an automobile (mobile power supply car) in which a generator driven by a gas turbine is installed on a cargo bed as shown in FIG. 3 has been devised. The mobile power supply vehicle T shown in FIG. 3 includes a gas turbine GT and a generator GE driven by the power of the gas turbine GT. The gas turbine GT and the generator GE are connected via a speed reducer RG. ing. The gas turbine GT, the speed reducer RG, and the generator GE are installed on a gantry K provided on the loading platform F of the main vehicle, and are arranged inside the package C. A gas turbine supply duct 11 for supplying air outside the package C to the gas turbine GT is connected to the gas turbine GT, and exhaust gas from the gas turbine GT is exhausted from the rear of the package C to the outside. An exhaust duct 12 for exhausting gas turbine is connected. The gas turbine air supply duct 11 is provided with a gas turbine air supply silencer 11a, and the gas turbine exhaust duct 12 is provided with a gas turbine exhaust silencer 12a.
[0003]
At a predetermined position of the package C, an air supply port 13 through which external air can be supplied to the inside of the housing wall C and an exhaust device 14 for exhausting the gas inside the package C to the outside are provided. The exhaust device 14 is provided with an exhaust fan 14a, and the interior of the package C is ventilated by driving the exhaust fan 14a. Reference numeral 15 denotes a front door, which is pivotally supported so that a pair of doors are double-opened, 16 is a GT exhaust door, and 17 is a ventilation exhaust door, both of which are pivotally supported so that the pair of doors are double-opened. ing. These doors are open when power is being generated, and are closed when the vehicle is moving or stopped without power generation. Reference numeral 18 denotes a driver's seat. The exhaust silencer 12a is intended to mute the exhaust side of the gas turbine GT. In this example, a split duct silencer as shown in FIG. 2 is used. In the split-type duct silencer, the part a in the figure is an air passage, the part b is a sound absorbing material such as glass wool, and the boundary between a and b uses punching metal.
[0004]
[Problems to be solved by the invention]
The exhaust temperature of the gas turbine reaches a maximum of 630 ° C., and the temperature of the outer surface of the exhaust duct 12 exceeds 100 ° C. because a large amount of heat insulating material cannot be used due to weight and space problems. On the other hand, since the package C uses an aluminum material to reduce the weight, the heat-resistant temperature is low, and when the temperature is raised by radiant heat from the exhaust duct, the package C is damaged and is also a safety problem. By attaching a heat insulating material such as glass wool to the outer surface of the exhaust duct 12, it is possible to prevent such damage. However, if a heat insulating material having sufficient performance is applied, the weight and size of the exhaust duct become excessive. The cost is increased by the amount of insulation.
[0005]
The invention has been devised in view of such problems of the prior art of the present invention, and greatly reduces the amount of insulation material such as glass wool used in the exhaust duct or prevents damage to the package without using insulation material. It is an object of the present invention to provide an exhaust duct cooling device that can improve safety and improve safety.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an exhaust duct cooling device according to the present invention is provided in a mobile power vehicle in which a gas turbine and a generator are placed in a package installed on a truck bed, surrounding a gas turbine exhaust port, A gap is provided between the exhaust duct that exhausts the exhaust of the gas turbine upward from the rear of the package and the inner surface of the package, an inlet for cooling air is provided on the package floor near the exhaust duct, and an upper end of the exhaust duct and an opening on the upper surface of the package A cooling air discharge port is provided between the two and a natural flow is caused in the gap between the exhaust duct and the inner surface of the package.
[0007]
Next, the operation of the present invention will be described. Since a gap is provided between the exhaust duct and the inner surface of the package, and a cooling air exhaust port and a suction port are provided above and below the gap, an upward flow is generated when the air in the gap is warmed by the high-temperature exhaust duct. The air changes.
Furthermore, since the ejector effect is produced at the cooling air discharge port due to the strong upward flow of the gas turbine exhaust from the exhaust duct, the upward flow of the cooling air is further increased.
[0008]
The exhaust duct is cooled by the upward flow of such cooling air, the temperature of the outer surface is lowered, and the amount of radiant heat from the exhaust duct is reduced. Although the temperature of the package surrounding the exhaust duct also rises due to the radiant heat from the exhaust duct, it is similarly cooled by the upward flow of cooling air. Therefore, the temperature of the package is kept low, there is no risk of damage, and safety is improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an AA arrow view of FIG. As shown in FIGS. 1 and 3, the mobile power supply vehicle T has a gas turbine GT and a generator GE mounted in a package C installed on a truck bed F. An exhaust duct 12 for discharging the exhaust of the gas turbine GT to the outside of the package C is provided at the rear part of the package C. As shown in FIG. 1, the exhaust duct 12 is provided so as to surround the gas turbine exhaust port 4, and exhausts the exhaust 5 of the gas turbine GT upward from the rear part of the package C. The exhaust gas 5 of the gas turbine GT once flows downward from the gas turbine exhaust port 4, and then U-turns and flows upward. A gas turbine exhaust silencer 12a is provided above the exhaust duct 12, and the exhaust 5 of the gas turbine GT is exhausted upward through the silencer 12a. The exhaust duct 12 is supported by a column 7 erected on the floor surface Ca of the package C. A gap 1 is provided between the exhaust duct 12 and the inner surface of the package C. The gap 1 is preferably about 70 to 100 mm. Reference numeral 2 denotes a suction port for the cooling air 6 provided on the floor surface Ca of the package C near the exhaust duct 12, and is provided below the gap 1. Reference numeral 3 denotes an outlet for the cooling air 6 provided between the upper end of the exhaust duct 12 and the opening Cb on the upper surface of the package C, and is provided above the gap 1.
[0010]
Next, the operation of this embodiment will be described. Since the gap 1 is provided between the exhaust duct 12 and the inner surface of the package C, and the discharge port 3 and the suction port 2 for the cooling air 6 are provided above and below the gap 1, the air in the gap 1 is warmed by the high-temperature exhaust duct 12. As a result, an upward flow is generated, and the internal air is always replaced. Further, the strong upward flow of the gas turbine exhaust 5 from the exhaust duct 12 causes the ejector effect at the discharge port 3 of the cooling air 6, so that the upward flow of the cooling air 6 is further strengthened.
[0011]
The exhaust duct 12 is cooled by the upward flow of the cooling air 6 as described above, the temperature of the outer surface is lowered, and the amount of radiant heat from the exhaust duct 12 is reduced. Although the temperature of the package C surrounding the exhaust duct rises due to the radiant heat from the exhaust duct 12, it is similarly cooled by the upward flow of the cooling air 6. Therefore, the temperature of the package C is kept low, there is no possibility of causing damage, and safety is improved.
[0012]
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
[0013]
【The invention's effect】
As described above, the exhaust duct cooling device for a mobile power vehicle according to the present invention is an aluminum that surrounds the exhaust duct by cooling the exhaust duct of the gas turbine by causing a natural flow of cooling air around the outer periphery of the exhaust duct. Since the heat damage of the package made by the product is prevented, there is no need for heat insulation to prevent the package damage, and the cost can be reduced and the overall weight of the mobile power supply car can be reduced. Has an effect. The package may not be made of aluminum but may be a steel plate, but the safety is increased due to a decrease in temperature.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view seen from the back of an exhaust duct cooling device for a mobile power vehicle according to the present invention.
FIG. 2 is a perspective view of a split-type duct silencer.
FIG. 3 is a side view of a mobile power supply vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Crevice 2 Inlet 3 Outlet 4 Gas turbine exhaust 5 Gas turbine exhaust 6 Cooling air C Package Ca Package floor T Mobile power vehicle GT Gas turbine GE Generator

Claims (1)

トラックの荷台Ｆに設置したアルミニウム製のパッケージＣ内にガスタービンＧＴと発電機ＧＥを載置した移動電源車Ｔにおいて、ガスタービン排気口４を囲繞して設けられ、ガスタービンＧＴの排気５をパッケージＣ後部から上方に排出する排気ダクト１２とパッケージＣ内面との間に隙間１を設け、排気ダクト１２付近のパッケージ床面Ｃａに冷却空気の吸入口２を設け、排気ダクト１２上端とパッケージ上面の開口との間に冷却空気の排出口３を設けてなり、上記排気ダクト１２は上部に消音器１２ａを備え、下部はガスタービン排気口４と平行な垂直断面の形状が逆台形状であり、ガスタービン排気口４には下方に開口を有する板が取り付けられていて、ガスタービン排気口４からの排気５は一旦下方に流れ、Ｕターンして上方に流れるようになっており、吸入口２から流入した冷却空気６は排気ダクト１２によって暖められるとともに、排気ダクト１２から排出される排気５のエジェクタ効果を受けて上昇流になるようになっていることを特徴とする移動電源車の排気ダクト冷却装置。In a mobile power supply vehicle T in which a gas turbine GT and a generator GE are mounted in an aluminum package C installed on a truck bed F, the gas turbine exhaust port 4 is provided so as to surround the exhaust 5 of the gas turbine GT. A gap 1 is provided between the exhaust duct 12 that discharges upward from the rear part of the package C and the inner surface of the package C, a cooling air inlet 2 is provided in the package floor surface Ca near the exhaust duct 12, and the upper end of the exhaust duct 12 and the upper surface of the package The exhaust duct 12 is provided with a silencer 12a in the upper part, and the lower part has a reverse trapezoidal shape in a vertical section parallel to the gas turbine exhaust port 4. The gas turbine exhaust port 4 is provided with a plate having an opening on the lower side, and the exhaust gas 5 from the gas turbine exhaust port 4 once flows downward and then makes a U-turn and flows upward. Has become so that, the cooling air 6 flowing in from the suction port 2 is adapted with warmed by the exhaust duct 12, the upward flow by receiving an ejector effect of exhaust 5 discharged from the exhaust duct 12 An exhaust duct cooling device for a mobile power vehicle characterized by the above.
JP2000281449A 2000-09-18 2000-09-18 Exhaust duct cooling system for mobile power supply cars Expired - Fee Related JP4543528B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008115757A (en) * 2006-11-02 2008-05-22 Ebara Yoshikura Hydro-Tech Co Ltd Exhaust equipment of gas-turbine
GB201410057D0 (en) * 2014-06-06 2014-07-16 Rolls Royce Plc A duct arrangement for an internal combustion engine
CN110843644A (en) * 2019-10-30 2020-02-28 河南平高电气股份有限公司 Mobile power generation system and gas turbine power generation vehicle thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58127120U (en) * 1982-02-23 1983-08-29 防衛庁技術研究本部長 Exit structure of high temperature gas exhaust pipe
JPS58211533A (en) * 1982-06-04 1983-12-09 Hitachi Ltd Heat-insulating structure for outside of exhaust duct of gas turbine
JPS59147829A (en) * 1983-02-14 1984-08-24 Hitachi Ltd External heat insulating structure for exhaust duct of gas turbine
JPH01158529U (en) * 1988-04-15 1989-11-01
JPH0710438U (en) * 1993-07-23 1995-02-14 株式会社明電舎 Gas turbine ejector
JPH1193690A (en) * 1997-09-24 1999-04-06 Sts Kk Gas turbine driving power unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58127120U (en) * 1982-02-23 1983-08-29 防衛庁技術研究本部長 Exit structure of high temperature gas exhaust pipe
JPS58211533A (en) * 1982-06-04 1983-12-09 Hitachi Ltd Heat-insulating structure for outside of exhaust duct of gas turbine
JPS59147829A (en) * 1983-02-14 1984-08-24 Hitachi Ltd External heat insulating structure for exhaust duct of gas turbine
JPH01158529U (en) * 1988-04-15 1989-11-01
JPH0710438U (en) * 1993-07-23 1995-02-14 株式会社明電舎 Gas turbine ejector
JPH1193690A (en) * 1997-09-24 1999-04-06 Sts Kk Gas turbine driving power unit

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