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WO1992019864A1 - Systemes de circulation hydraulique - Google Patents

Systemes de circulation hydraulique Download PDF

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Publication number
WO1992019864A1
WO1992019864A1 PCT/GB1992/000796 GB9200796W WO9219864A1 WO 1992019864 A1 WO1992019864 A1 WO 1992019864A1 GB 9200796 W GB9200796 W GB 9200796W WO 9219864 A1 WO9219864 A1 WO 9219864A1
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WO
WIPO (PCT)
Prior art keywords
column
liquid
tank
suspension
pump
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.)
Ceased
Application number
PCT/GB1992/000796
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English (en)
Inventor
Alan David Kenney
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1992019864A1 publication Critical patent/WO1992019864A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/02—Other machines or engines using hydrostatic thrust
    • 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

Definitions

  • Particularly preferred particles are ferromagnetic, for example, magnetite or ferrosilicon which are widely used in high density suspensions for processing coal and other minerals, because their use is well understood by those skilled in the art and they can be recovered and purified using magnetic techniques.
  • Figure 4 shows a variation on the embodiment of Figure 3.
  • the energy consumption of the suspension pumping circuit has a direct bearing on the net energy recoverable from the apparatus, so it is important that the most energy efficient means possible are employed.
  • the force pumps can have high mechanical efficiency relative to other commercially available pumps.
  • the apparatus of Figure 3 operates in the following manner.
  • the suspension of magnetite or ferro ⁇ silicon in water is circulated by the force pump 50 along pipes 65 and 66 discharging into tank 26 at a head of only 12 to 18 inches Wg as between level 2 to level 3.
  • This head pressure is transmitted back to the force pump 50 from tank 26 and pipe 12 and 30, opening the non-return'-valves 60 for recirculation.
  • valve 22 When the desired balance has been achieved and the water is at level 6, then valve 22 is opened, allowing water to flow via the turbine 24 to tank 26, where it rejoins the suspension circuit to initiate overall circulation between the columns. This causes the suspension in tank 26 and column 12 to dilute, which results in a back up of this dilute suspension in tank 26 to regain the original balances between the columns. The suspension will settle out in tank 26 to the inlet point of the suspension circuit, causing a further back up clean water to regain the original balance and reducing the effective height of the free falling water from tank 14 via the turbine 24.
  • a pump 114 is fitted with its point of suction at the bottom of tank 104 and connected on its discharge side to one end of pipe 116 which in turn connects to the bottom of tank ' 108.
  • Manometers 118 and 120 are connected to the suction and discharge sides of pump 114 respectively arranged to minimize venturi, turbulence and other flow effects.
  • the liquid level in column 100 rises to balance the hydraulic pressure of the denser fluid in column 102.
  • the liquid in column 100 at this stage is primarily water but may contain some magnetite until the external circulation pump is turned off and an effective phase separation occurs in tank 104. As this separation takes place, the density of the magnetite suspension flowing in pipe 116, hereinafter referred to as the dense medium circulation, rises to its maximum value for the flow capacity of pump 114.
  • the overall circulation of water in the system is monitored by means of flowmeter 122 and adjusted by means of control valve 124 to obtain the desired operational ratio.
  • the rate of overall circulation of water equals the rate of dense medium circulation and the specific gravity of the suspension returning down column 100 is reduced proportionately.
  • Stable operation over long periods of time can then be maintained without loss of overall circulation while retaining domains of different density though with some mixing at interfaces.
  • the commercial value of such a system lies in its ability to amplify the operational head of the dense medium circulation pump to obtain overall pumping against a higher head.
  • Such an open system may also be used for energy storage, this time through continuous operation as part of a hydroelectric scheme to pump water back to higher levels during periods of low demand for electricity.
  • FIG. 5 An apparatus was constructed as shown schematically in Figure 5.
  • a cylindrical steel separating tank (tank 104) 36 inches in diameter by 48 inches deep with a 48 inch 60 degree cone base giving a water capacity of 1,000 litres was supported in the lower half of a two tier steel framework 16.24 feet high.
  • a telescopic extension to the framework was provided to support a 30 litre 11.5 inch diameter clear
  • a manifold at the top of the 4 inch pipe forming column 108 was connected to 8 feet of 3 inch clear rigid PVC pipe forming tank 108.
  • To this manifold was also connected 2 inch flexible tubing from the bottom of tank 106 to form the water circulation pipe 110 fitted with a 2 inch Saunders valve (flow control valve 112) and 2 inch flexible tubing carrying the dense medium circulation.
  • the dense medium circulation was achieved by locating a 1.25 inch low pressure submersible centrifugal pump (pump 114) of the type used for sump draining as near as possible to the bottom of tank 104 attached on its discharge side to a 4 inch manifold and hence with 2 inch flexible tubing passing through a seal in the top of tank 104 connected to the manifold at the top of column 102.
  • Flexible pipe 1.25 inches in diameter was fastened to the side of pump 114 with its opening level with but not close to the inlet grill of the pump to form a manometer (manometer 118).
  • a second 1.25 inch flexible tube manometer (manometer 120) was connected to the manifold on the discharge side of pump 114.
  • Pump 114 was capable of delivering a full flow of 5,250 litre/hour limited to 2,220 litre/hour when part of its output was diverted through a bypass (not shown in Figure 5) attached to the manifold on the discharge side of pump 114 and leading back to the bottom of tank 104.
  • Pump capacities were measured by disconnecting the flexible hose from column 102 and recording the time required to fill a 100 litre container to precalibrated levels.
  • Tank 104 was first charged with 750 kgs of 60 mesh magnetite powder and filled with tap water from a hose connected to a valve in the top of the tank. The magnetite was then fluidised to establish a suspension in tank 104 by means of an external circulation system
  • the external circuit was then operated for 3 hours to establish a magnetite suspension in tank 104 before additional water was added to raise the level to the bottom of tank 108, the fluidisation pump turned off, and the external circuit isolated from the rest of the system.
  • flow control valve 112 fully closed pump 114 was started with its bypass open to establish a dense medium circulation through column 102 of 2,220 litres/hour.
  • Example 2 To demonstrate that the bypass from pump 114 does not contribute to the local circulation requirement to keep magnetite in suspension in column 102, Example 1 was repeated with the bypass closed and an electronic phase shifter used to limit the speed of pump 114 to obtain a once through pumping velocity of 2,220 litres/hour of magnetite suspension. In this case the water flow through control valve 112 was also adjusted to 2,220 litres/hour, giving an operational ratio of 1:1. Once stable overall circulation had been achieved, a working head of 6.5 feet was obtained and maintained for a period of 1.5 hours. Within the experimental error involved in measuring magnetite suspension flow rates and densities, the lower working head compared with Example 1 corresponds with the larger operational ratio.
  • EXAMPLE 3 To demonstrate that the kinetic energy of the water circulatin ⁇ from tank 106 to tank 108 in Examole I is also not an essential requirement to keep magnetite in suspension in column 102 and to demonstrate the practicalities of installing a turbine to recover energy, the apparatus described in Example 1 was modified so that pipe 110 decanted into an intermediate 25 gallon tank placed adjacent to tank 108 to dissipate the greater proportion of this energy. The flow of water into this intermediate tank and hence overall circulation between column 100 and column 102 was still controlled by valve 112. The circuit was completed by pumping the water in the intermediate tank into column 102 by means of a 0.5 inch centrifugal pump of limited capacity. Magnetite suspension circulation was established at 2,220 litres/hour in the same manner as in Example 1, followed by water circulation at the
  • 100 to column 102 was found to be 700 litres/hour as measured by flowmeter 122 giving an operational ratio of 0.32:1.
  • a working head of 11.2 feet was obtained with a pressure difference of 12 inches of water across pump 114.
  • This working head was maintained for 2 hours and was if anything 10% higher than that expected by comparison with Example 1, after the lower operational ratio is taken into account though still comparable within experimental error.
  • the discharge pressure of the centrifugal pump transferring water from the intermediate tank to the top of column 102 was 3 inches greater than the level of water in tank 108 as measured by a manometer, such that the water was overflowing from column 100 to column 102 with the energy equivalent to a fall of 0.25 feet compared with the energy equivalent of a fall of 11.2 feet if the intermediate tank had not been used and pipe 110 led directly to column 102.
  • the energy which may be extracted from the overall circulation of the system may be calculated to be 6.3 watts, compared with the energy absorbed by local circulation of the magnetite suspension by pump 114 of 3.4 watts.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

Système hydraulique comprenant une première et une deuxième colonnes (100, 102 respectivement) contenant un liquide, le liquide présent dans la deuxième colonne contenant une suspension de matériau particulaire finement divisé de façon à accroître sa gravité spécifique par rapport au liquide de la première colonne, un moyen (104) de transfert du liquide depuis la deuxième colonne vers la première colonne permettant de conserver le matériau particulaire dans la deuxième colonne, la hauteur du liquide de la première colonne étant plus grande que celle de la deuxième colonne. Enfin, le système hydraulique comprend un moyen (106, 110) permettant au liquide de la première colonne de déborder ainsi qu'un moyen permettant de maintenir le niveau du liquide dans la deuxième colonne.
PCT/GB1992/000796 1991-04-30 1992-04-30 Systemes de circulation hydraulique Ceased WO1992019864A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919109325A GB9109325D0 (en) 1991-04-30 1991-04-30 Apparatus for providing motive power
GB9109325.2 1991-04-30

Publications (1)

Publication Number Publication Date
WO1992019864A1 true WO1992019864A1 (fr) 1992-11-12

Family

ID=10694222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/000796 Ceased WO1992019864A1 (fr) 1991-04-30 1992-04-30 Systemes de circulation hydraulique

Country Status (3)

Country Link
AU (1) AU1653392A (fr)
GB (1) GB9109325D0 (fr)
WO (1) WO1992019864A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066199A1 (fr) * 1998-06-18 1999-12-23 Alan David Kenney Force motrice inepuisable
US7377492B2 (en) 2004-08-11 2008-05-27 A Better Power, Llc Hydraulic liquid pumping system
WO2015118527A1 (fr) * 2014-02-06 2015-08-13 Yuval Broshy Système et procédé pour le stockage d'énergie pompée à capacité élevée
WO2019202456A1 (fr) * 2018-04-16 2019-10-24 Magellan & Barents, S.L. Système et procédé de stockage d'énergie hydraulique pompée
WO2020225517A1 (fr) * 2019-05-09 2020-11-12 Alan David Kenney Système de conversion d'energie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191516A1 (fr) * 1985-02-15 1986-08-20 Shell Internationale Researchmaatschappij B.V. Stockage et récupération d'énergie

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191516A1 (fr) * 1985-02-15 1986-08-20 Shell Internationale Researchmaatschappij B.V. Stockage et récupération d'énergie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, vol. 8, no. 164 (M-313)[1601], 28 July 1984, & JP,A,5958167 (MASATOSHI TOYODA) 3 April 1984 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066199A1 (fr) * 1998-06-18 1999-12-23 Alan David Kenney Force motrice inepuisable
US7377492B2 (en) 2004-08-11 2008-05-27 A Better Power, Llc Hydraulic liquid pumping system
WO2015118527A1 (fr) * 2014-02-06 2015-08-13 Yuval Broshy Système et procédé pour le stockage d'énergie pompée à capacité élevée
WO2019202456A1 (fr) * 2018-04-16 2019-10-24 Magellan & Barents, S.L. Système et procédé de stockage d'énergie hydraulique pompée
US11365713B2 (en) 2018-04-16 2022-06-21 Magellan & Barents, S.L. Pumped hydro energy storage system and method
WO2020225517A1 (fr) * 2019-05-09 2020-11-12 Alan David Kenney Système de conversion d'energie
CN114072575A (zh) * 2019-05-09 2022-02-18 艾伦·大卫·肯尼 能量转换系统
JP2022537637A (ja) * 2019-05-09 2022-08-29 アラン デイヴィッド ケニー エネルギー変換システム
US11913425B2 (en) 2019-05-09 2024-02-27 Alan David KENNEY Energy conversion system
CN114072575B (zh) * 2019-05-09 2024-06-25 艾伦·大卫·肯尼 能量转换系统

Also Published As

Publication number Publication date
AU1653392A (en) 1992-12-21
GB9109325D0 (en) 1991-06-19

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