JP2000291525A - Power generating system - Google Patents
Power generating systemInfo
- Publication number
- JP2000291525A JP2000291525A JP11097116A JP9711699A JP2000291525A JP 2000291525 A JP2000291525 A JP 2000291525A JP 11097116 A JP11097116 A JP 11097116A JP 9711699 A JP9711699 A JP 9711699A JP 2000291525 A JP2000291525 A JP 2000291525A
- Authority
- JP
- Japan
- Prior art keywords
- water
- storage tank
- water supply
- pipe
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/50—Energy storage in industry with an added climate change mitigation effect
Landscapes
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は揚水ポンプにより
地下水を貯水タンクに汲み上げ、給水ポンプによって工
場各設備に給水する給水系に関し、詳しくはこのような
給水系における発電システムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply system in which groundwater is pumped into a storage tank by a water pump and water is supplied to various facilities in a factory by a water supply pump, and more particularly to a power generation system in such a water supply system.
【０００２】[0002]
【従来の技術】製紙工場などではその設備の稼動のため
に大量の水が必要である。そこで、クローズド型の給水
設備を備えている。即ち、揚水ポンプにより地下水を貯
水タンクにくみ上げ、これを給水管を介して工場内の各
設備に常時給水するようにしている。2. Description of the Related Art In a paper mill or the like, a large amount of water is required to operate its equipment. Therefore, a closed type water supply facility is provided. That is, groundwater is pumped into a water storage tank by a water pump, and the water is constantly supplied to each facility in the factory via a water supply pipe.
【０００３】貯水タンクは地上１０ｍなどといった高所
に位置しており、給水管側において必要な水圧を得るよ
うに意図している。しかしながら、工場内における給水
管が長い場合は末端側では水圧が足りなくなってしま
う。そこで、給水管側にもポンプを設置することによ
り、下流側においても必要な水圧を得ることができるよ
うにしている。[0003] The water storage tank is located at a high place such as 10 m above the ground, and is intended to obtain necessary water pressure on the water supply pipe side. However, when the water supply pipe in the factory is long, the water pressure becomes insufficient at the terminal side. Therefore, by installing a pump also on the water supply pipe side, a required water pressure can be obtained also on the downstream side.
【０００４】[0004]
【発明が解決しようとする課題】貯水タンクから水は給
水管に向け落下しているため、その直下の部分での運動
エネルギは大きい。しかしながら、給水管側において給
水ポンプを使用している場合は、貯水タンクから落下す
る水の運動エネルギは有効に利用されず、殆どが無駄と
なっていた。この発明はかかる点に鑑みてなされたもの
であり、この発明の目的は今までは捨てられていた水の
エネルギを有効活用を図ることにある。Since the water falls from the water storage tank toward the water supply pipe, the kinetic energy in a portion immediately below the water supply pipe is large. However, when a water supply pump is used on the water supply pipe side, the kinetic energy of water falling from the water storage tank is not effectively used, and most of the energy is wasted. The present invention has been made in view of such a point, and an object of the present invention is to effectively utilize the energy of water that has been discarded until now.
【０００５】[0005]
【課題を解決するための手段】この発明によれば、揚水
ポンプにより地下水を貯水タンクに汲み上げ、給水ポン
プによって工場各設備に給水する給水系において、貯水
タンクから地下水を落下させる直立管の最下部付近でか
つ給水ポンプの上流に貯水タンクから落下される水のエ
ネルギによって回転せしめられる水車を設け、水車の回
転運動によって発電機を回転させ、得られた電気エネル
ギを工場に供給することを特徴とする発電システムが提
供される。According to the present invention, in a water supply system in which groundwater is pumped into a water storage tank by a water pump and water is supplied to each plant by a water supply pump, the lowermost part of an upright pipe for dropping groundwater from the water storage tank. A water turbine that is rotated by the energy of water dropped from the water storage tank near and upstream of the water supply pump is provided, the generator is rotated by the rotational motion of the water turbine, and the obtained electric energy is supplied to the factory. A power generation system is provided.
【０００６】揚水ポンプにより地下水は貯水タンクに汲
み上げられ、貯水タンクから落下された水は給水ポンプ
より給水系に圧送され、工場の各設備に給水される。貯
水タンクから水を落下させるための直立管の最下部付近
に設けられた水車は落下する水のエネルギによって回転
せしめられ、水車のこの回転運動は発電機に伝達され、
発電機により得られた電気エネルギは工場に供給され
る。貯水タンクからの水を落下させる直立管に水車を設
けたため、水車の設置による圧力損失は当然起こりうる
が、水車の下流に当初より設置されている給水ポンプに
よって再度加圧されるため、給水管における必要な水圧
を確保することができる。[0006] The groundwater is pumped by a water pump into a water storage tank, and the water dropped from the water storage tank is pumped into a water supply system by a water supply pump and supplied to each facility of the factory. The turbine provided near the bottom of the upright pipe for dropping water from the water storage tank is rotated by the energy of the falling water, and this rotating motion of the turbine is transmitted to the generator,
Electric energy obtained by the generator is supplied to the factory. Since a water turbine was installed in the upright pipe for dropping water from the water storage tank, pressure loss due to the installation of the water turbine could naturally occur, but since the water was pumped up again by the water supply pump installed from the beginning downstream of the water turbine, the water supply pipe was Required water pressure can be secured.
【０００７】この発明では従来は貯水タンクから落下す
る水のエネルギによって水車を回し、その回転によって
発電機を回している。そのため、従来は捨てられていた
エネルギの有効利用を図ることができる。In the present invention, a water wheel is conventionally turned by the energy of water falling from a water storage tank, and a generator is turned by its rotation. Therefore, it is possible to effectively use the energy that has been conventionally thrown away.
【０００８】上記構成において、前記水車を迂回する迂
回パイプを有し、該迂回パイプに、常態では閉鎖される
が、緊急時に開かれるように制御される制御弁を設ける
ことができる。制御弁は通常は閉じられ、貯水タンクか
らの水は全量が水車に向かい発電に供されるが、水車の
故障時には制御弁を開くことにより、迂回パイプを介し
て必要量の水を給水管に導くようにすることができる。[0008] In the above structure, a bypass pipe may be provided to bypass the water turbine, and the bypass pipe may be provided with a control valve which is normally closed but controlled to be opened in an emergency. The control valve is normally closed and the entire amount of water from the water storage tank goes to the turbine to be used for power generation.In the event of a turbine failure, the control valve is opened to supply the required amount of water to the water supply pipe via the bypass pipe. Can be guided.
【０００９】上記構成において、発電機は直流発電機で
あり、インバータを介して商用電源ないしは自家発電設
備を利用した工場の給電設備に接続することができる。
この構成により水車駆動の発電機により得られた電気エ
ネルギを全て工場稼動用のエネルギとして無駄なく再利
用することができ、発電設備の有用性を高めることがで
きる効果がある。In the above configuration, the generator is a DC generator, and can be connected to a commercial power supply or a power supply facility of a factory using a private power generation facility via an inverter.
With this configuration, all the electric energy obtained by the water turbine driven generator can be reused without waste as the energy for operating the factory, and the utility of the power generation equipment can be enhanced.
【００１０】[0010]
【発明の実施の形態】図１において１０は貯水タンクで
あり、高さＨの鉄塔１２上に設置されている。図示しな
い揚水ポンプ（ピストンポンプ等）からの地下水は揚水
パイプ１３を介して貯水タンク１０に汲み上げられる。
貯水タンク１０に溜められた地下水はその下部の直立管
１４より取り出され、給水ポンプ（ベーンポンプ等）１
６を介して給水管１８より工場の各部に給水される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 denotes a water storage tank, which is installed on a steel tower 12 having a height H. Groundwater from a pump (not shown) (not shown) is pumped into a water storage tank 10 via a pumping pipe 13.
The groundwater stored in the water storage tank 10 is taken out from an upright pipe 14 at a lower portion thereof and supplied to a water supply pump (a vane pump or the like) 1.
Water is supplied to each part of the factory from the water supply pipe 18 via the pipe 6.
【００１１】貯水タンク１０は例えばＨ＝１０ｍといっ
た高所に設置されており、直立管１４の直下での圧力
（静圧）は高くなっている。しかしながら、貯水タンク
１０による静圧効果のみでは給水管１８の末端側では水
圧が足りなくなるため、給水ポンプの吐出圧力（動圧）
によって給水管１６の末端に至るまで必要な水圧を確保
するようにしている。The water storage tank 10 is installed at a high place, for example, H = 10 m, and the pressure (static pressure) immediately below the upright pipe 14 is high. However, only with the static pressure effect by the water storage tank 10, the water pressure becomes insufficient at the terminal side of the water supply pipe 18, so that the discharge pressure (dynamic pressure) of the water supply pump is used.
Thus, necessary water pressure is ensured up to the end of the water supply pipe 16.
【００１２】この発明によれば、貯水タンク１０の底部
における直立管１４の下端付近に水車２０が設置されて
いる。図２に示すように水車２０は筒状のケーシング２
２と、筒状ケーシング２２内に収容される羽根車２４と
から構成される。羽根車２４はケーシング２２に両端に
おいて回転可能に軸支される回転軸２６と、回転軸２６
に固定されるハブ２８と、ハブ２８から放射状に延びる
複数のブレード３０とから構成される。入口管３２は上
流端が貯水タンク１０からの直立管１４の下端に接続さ
れ、入口管３２の下流端はケーシング２２の入口部22A
に接続されている。出口管３４は上流端がケーシング２
２の出口部22Bに接続され、出口管３４の下流端は給水
ポンプ１６の吸入側に接続されている。図２に示すよう
に入口部22Aに対する入口管３２の開口方向は接線方向
であり、そのため直立管１４からケーシング２２に流入
される水のエネルギが羽根車２４に効率的に伝達される
ようになっている。According to the present invention, the water wheel 20 is installed near the lower end of the upright pipe 14 at the bottom of the water storage tank 10. As shown in FIG. 2, the water turbine 20 is a cylindrical casing 2.
2 and an impeller 24 housed in the cylindrical casing 22. The impeller 24 includes a rotating shaft 26 rotatably supported at both ends of the casing 22, and a rotating shaft 26.
And a plurality of blades 30 radially extending from the hub 28. The upstream end of the inlet pipe 32 is connected to the lower end of the upright pipe 14 from the water storage tank 10, and the downstream end of the inlet pipe 32 is connected to the inlet 22 A of the casing 22.
It is connected to the. The upstream end of the outlet pipe 34 is the casing 2.
The downstream end of the outlet pipe 34 is connected to the suction side of the water supply pump 16. As shown in FIG. 2, the opening direction of the inlet pipe 32 with respect to the inlet section 22A is tangential, so that the energy of water flowing into the casing 22 from the upright pipe 14 is efficiently transmitted to the impeller 24. ing.
【００１３】バイパス管３６は一端が直立管１４の中間
部位に接続され、他端は水車２０と給水ポンプ１６との
間に接続されている。バイパス管３６上に制御弁３８が
設けられる。制御弁３８は通常は閉鎖位置にあり、貯水
タンク１０からの水は全量が水車２０に向かうようにな
っている。制御弁３８は水車２０の故障等の緊急時に開
放され、貯水タンク１０から落下してきた水はバイパス
管３６を介して給水ポンプ１６及び給水管１８側に向か
うことができるようになっている。The bypass pipe 36 has one end connected to an intermediate portion of the upright pipe 14 and the other end connected between the water wheel 20 and the water supply pump 16. A control valve 38 is provided on the bypass pipe 36. The control valve 38 is normally in the closed position, and the entire amount of water from the water storage tank 10 is directed to the water wheel 20. The control valve 38 is opened in an emergency such as a failure of the water turbine 20 or the like, so that the water dropped from the water storage tank 10 can flow toward the water supply pump 16 and the water supply pipe 18 via the bypass pipe 36.
【００１４】図１において、直流発電機４０は水車２０
に近接して設置されており、水車２０によって得られた
回転運動を直流発電機４０に伝達する伝導機構が設けら
れる。即ち、この伝導機構は水車２０の回転軸２６上の
プーリ４２と、直流発電機４０の回転軸上のプーリ４４
と、これらプーリ42, 44間を巡るベルト４６とにより構
成される。この結果、貯水タンク１０から落下する水の
エネルギによる水車の回転軸２６の回転によって直流発
電機４０が回転駆動され、直流の電気エネルギを得るこ
とができる。この実施形態では水車２０の回転軸２６は
ベルト伝導機構によって直流発電機４０に連結されてい
るが、水車２０の回転軸２６と同軸に直流発電機４０の
回転軸を設けるようにしてもよいことは言うまでもな
い。Referring to FIG. 1, a DC generator 40 is
And a transmission mechanism for transmitting the rotational motion obtained by the water turbine 20 to the DC generator 40 is provided. That is, the transmission mechanism includes a pulley 42 on the rotating shaft 26 of the water turbine 20 and a pulley 44 on the rotating shaft of the DC generator 40.
And a belt 46 passing between the pulleys 42 and 44. As a result, the DC generator 40 is rotationally driven by the rotation of the rotating shaft 26 of the water wheel due to the energy of the water falling from the water storage tank 10, and DC electric energy can be obtained. In this embodiment, the rotating shaft 26 of the water turbine 20 is connected to the DC generator 40 by a belt transmission mechanism. However, the rotating shaft of the DC generator 40 may be provided coaxially with the rotating shaft 26 of the water turbine 20. Needless to say.
【００１５】良く知られていることであるが、直流発電
機４０は構造が簡単であるため低コストでありかつイン
バータ４８（直流−交流変換器）を用いることによって
商用電源からの電気エネルギないしは自家発電装置によ
る工場用給電設備に簡単に接続することができる。即
ち、図１において５０は商用電源や液体又は気体燃料を
エネルギ源とした自家発電装置との接続部である分電盤
を表している。そして、分電盤５０を介して工場への送
電ライン５２に接続されている。当然のことであるが、
商用電源からの電力が工場稼動のための主力電源となる
が、分電盤５０はインバータ４８からの水力エネルギに
よる電力を優先して送電ライン５２に供給する。そのた
め、発電機４０によって得られた電力は全て工場に供給
され、水力エネルギによる電力分商標電源による消費電
力が最大限節約され、水力エネルギの効率的使用が行わ
れるようになっている。As is well known, the DC generator 40 has a simple structure, is low in cost, and uses an inverter 48 (DC-AC converter) to provide electric energy from a commercial power supply or a private power generator. It can be easily connected to power supply equipment for factories using a power generator. That is, in FIG. 1, reference numeral 50 denotes a distribution board which is a connection portion with a commercial power supply or a private power generator using a liquid or gas fuel as an energy source. And it is connected to the power transmission line 52 to the factory via the distribution board 50. Not surprisingly,
The electric power from the commercial power supply becomes the main power supply for operating the factory, but the distribution board 50 supplies the electric power by the hydraulic energy from the inverter 48 to the power transmission line 52 with priority. Therefore, all the electric power obtained by the generator 40 is supplied to the factory, the power consumption of the power division power supply by the hydraulic energy is saved to the maximum, and the efficient use of the hydraulic energy is performed.
【００１６】揚水ポンプ（図示せず）の作動によって汲
み上げられた地下水は揚水パイプ１３より貯水タンク１
０に供給される。貯水タンク１０に溜められた地下水は
タンク１０の底部より直立管１４に流出され、水車２０
を経て給水ポンプ１６に送られ、給水ポンプ１６より圧
力下で給水管１８に送り出され、工場の各部に給水され
る。Groundwater pumped by a pump (not shown) is pumped from a pumping pipe 13 to a storage tank 1.
0 is supplied. The groundwater stored in the water storage tank 10 flows out of the bottom of the tank 10 into the upright pipe 14 and is then discharged from the water turbine
The water is supplied to the water supply pump 16 via the water supply pump 16, sent out to the water supply pipe 18 under pressure from the water supply pump 16, and supplied to each part of the factory.
【００１７】直立管１４から落下される水は入口管３２
より水車２０のケーシング２２に導入され、落下する水
のエネルギによって羽根車２４は回転せしめられる。周
知のように水車２０の出力Ｌは、水車の効率をηｔ、発
電機の効率をηｇとすれば、有効落差（貯水タンク１０
の高さ）をＨ(m)、貯水タンク１０から落下する水量を
Ｑ(m3/s)とすると Ｌ＝9.8Ｈ×Ｑ×ηｔ×ηｇ（KW） である。従って、有効落差ＨをＨを１０ｍ、水量を0.05
m3/s、ηｔ、ηｇをいずれも0.9(90%)とすると、Ｌ＝3.
97(KW)となり、製紙工場等では工場が稼動している限り
は、絶えず水は流れているためこの電力が常時得られる
ことになる。従って、この分の電力の節約が得られる。
即ち、 図１の給水システムでは給水管１８内の水圧は
基本的には全て給水ポンプ１６によって得られるもので
あり、一方、貯水タンク１０から落下する水の位置エネ
ルギは直立管１４の下端では大きなものであったが、給
水管１８の圧力を得るためには役に立っておらず、この
位置エネルギは結局は捨てられていたことになってい
た。この発明では、従来は無駄となったいた貯水タンク
から落下する水のエネルギを有効に利用することができ
るのである。The water dropped from the upright pipe 14 is supplied to the inlet pipe 32.
The impeller 24 is rotated by the energy of the water that is introduced into the casing 22 of the water wheel 20 and falls. As is well known, the output L of the water turbine 20 can be calculated as an effective head (the water storage tank 10) if the efficiency of the water turbine is η t and the efficiency of the generator is η g.
Is H (m), and the amount of water falling from the water storage tank 10 is Q (m 3 / s), and L = 9.8H × Q × η t × η g (KW). Therefore, the effective head H is set to 10 m and the water amount is set to 0.05 m.
Assuming that m 3 / s, η t , and η g are all 0.9 (90%), L = 3.
It becomes 97 (KW). In a paper mill, etc., as long as the mill is operating, water is constantly flowing, so this power is always available. Therefore, power savings can be obtained.
That is, in the water supply system of FIG. 1, the water pressure in the water supply pipe 18 is basically all obtained by the water supply pump 16, while the potential energy of water falling from the water storage tank 10 is large at the lower end of the upright pipe 14. However, it did not help to obtain the pressure in the water supply pipe 18, and this potential energy was eventually discarded. According to the present invention, the energy of water falling from the water storage tank, which has been wasted in the past, can be effectively used.
【図１】図１はこの発明の発電システムの全体該略図で
ある。FIG. 1 is an overall schematic view of a power generation system according to the present invention.
【図２】図２は図１に使用される水車の断面図である。FIG. 2 is a sectional view of the water turbine used in FIG.
１０…貯水タンク １２…鉄塔 １４…直立管 １６…給水ポンプ １８…給水管 ２０…水車 ２２…ケーシング ２４…羽根車 ２６…回転軸 ３０…ブレード ３２…入口管 ３４…出口管 ３６…バイパス管 ３８…制御弁 ４０…直流発電機 ４８…インバータ ５０…分電盤 DESCRIPTION OF SYMBOLS 10 ... Water storage tank 12 ... Steel tower 14 ... Upright pipe 16 ... Water supply pump 18 ... Water supply pipe 20 ... Waterwheel 22 ... Casing 24 ... Impeller 26 ... Rotating shaft 30 ... Blade 32 ... Inlet pipe 34 ... Outlet pipe 36 ... Bypass pipe 38 ... Control valve 40 DC generator 48 Inverter 50 Distribution board
Claims (3)
汲み上げ、給水ポンプによって工場各設備に給水する給
水系において、貯水タンクから地下水を落下させる直立
管の最下部付近でかつ給水ポンプの上流に貯水タンクか
ら落下される水のエネルギによって回転せしめられる水
車を設け、水車の回転運動によって発電機を回転させ、
得られた電気エネルギを工場に供給することを特徴とす
る発電システム。In a water supply system in which groundwater is pumped into a water storage tank by a water pump and water is supplied to various facilities in the plant by a water supply pump, a water storage tank is provided near the bottom of an upright pipe for dropping groundwater from the water storage tank and upstream of the water supply pump. Provide a water wheel that is rotated by the energy of the water falling from the, the generator is rotated by the rotating motion of the water wheel,
A power generation system characterized by supplying the obtained electric energy to a factory.
該迂回パイプに、常態では閉鎖されるが、緊急時に開か
れるように制御される制御弁を設けたことを特徴とする
発電システム。2. It has a bypass pipe that bypasses the water turbine,
A power generation system, wherein a control valve, which is normally closed but controlled to be opened in an emergency, is provided in the bypass pipe.
電機は直流発電機であり、インバータを介して商用電源
ないしは自家発電設備を利用した工場の給電設備に接続
されていることを特徴とする発電システム。3. The system according to claim 1, wherein the generator is a DC generator and is connected to a commercial power supply or a power supply facility of a factory using a private power generation facility via an inverter. Power generation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097116A JP2000291525A (en) | 1999-04-05 | 1999-04-05 | Power generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097116A JP2000291525A (en) | 1999-04-05 | 1999-04-05 | Power generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000291525A true JP2000291525A (en) | 2000-10-17 |
Family
ID=14183611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11097116A Pending JP2000291525A (en) | 1999-04-05 | 1999-04-05 | Power generating system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000291525A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6698223B2 (en) | 2002-01-17 | 2004-03-02 | Hitachi, Ltd. | Energy collecting system and method of operating the same |
| US7019411B2 (en) | 2002-03-27 | 2006-03-28 | Hitachi, Ltd. | Energy recovery apparatus and method of operating energy recovering apparatus |
| WO2012154839A3 (en) * | 2011-05-10 | 2013-03-21 | William Riley | Multiple-use aquifer-based system |
| CN105370485A (en) * | 2015-10-15 | 2016-03-02 | 张建华 | Potential energy converter |
| CN114738165A (en) * | 2022-03-29 | 2022-07-12 | 温州大学 | Energy collecting mechanism combined with tap water pipe network |
-
1999
- 1999-04-05 JP JP11097116A patent/JP2000291525A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6698223B2 (en) | 2002-01-17 | 2004-03-02 | Hitachi, Ltd. | Energy collecting system and method of operating the same |
| US7174735B2 (en) | 2002-01-17 | 2007-02-13 | Hitachi, Ltd. | Energy collecting system and method of operating the same |
| US7191610B2 (en) | 2002-01-17 | 2007-03-20 | Hitachi, Ltd. | Energy collecting system and method of operating the same |
| JP2009168037A (en) * | 2002-01-17 | 2009-07-30 | Hitachi Industrial Equipment Systems Co Ltd | Energy recovery system and storage pump |
| US7019411B2 (en) | 2002-03-27 | 2006-03-28 | Hitachi, Ltd. | Energy recovery apparatus and method of operating energy recovering apparatus |
| WO2012154839A3 (en) * | 2011-05-10 | 2013-03-21 | William Riley | Multiple-use aquifer-based system |
| CN105370485A (en) * | 2015-10-15 | 2016-03-02 | 张建华 | Potential energy converter |
| CN114738165A (en) * | 2022-03-29 | 2022-07-12 | 温州大学 | Energy collecting mechanism combined with tap water pipe network |
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