EP1731858A1 - Dispositif à compensation pour une installation de refroidissement - Google Patents

Dispositif à compensation pour une installation de refroidissement Download PDF

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Publication number
EP1731858A1
EP1731858A1 EP05425419A EP05425419A EP1731858A1 EP 1731858 A1 EP1731858 A1 EP 1731858A1 EP 05425419 A EP05425419 A EP 05425419A EP 05425419 A EP05425419 A EP 05425419A EP 1731858 A1 EP1731858 A1 EP 1731858A1
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EP
European Patent Office
Prior art keywords
fluid
cooled
forced
forced cooling
plant
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.)
Withdrawn
Application number
EP05425419A
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German (de)
English (en)
Inventor
Bruno Bernardi
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.)
Nova Frigo SpA
Original Assignee
Nova Frigo SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nova Frigo SpA filed Critical Nova Frigo SpA
Priority to EP05425419A priority Critical patent/EP1731858A1/fr
Publication of EP1731858A1 publication Critical patent/EP1731858A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium

Definitions

  • the present invention relates to a compensation device for a cooling plant designed, in particular, but not exclusively, for use in industrial fields.
  • the object of the present invention is to realise a compensation device for a cooling plant that can lower the energy user of the plant, whilst allowing the plant to satisfy the needs of the users connected.
  • a cooling plant suitable for cooling a fluid to be cooled is globally indicated with reference numeral 1.
  • the plant 1 is fluidically connected to a user 2 that needs cooled fluid, in general with a fixed temperature interval.
  • the user 2 is, for example, a press, in which the cooled fluid cools the die and/or the counterdie.
  • the user generally requires cooled fluid with a temperature of between 15 degrees centigrade and 25 degrees centigrade.
  • the user 2 is a hydraulic device in which the cooled fluid cools the work fluid, for example oil.
  • the user requires cooled fluid with a temperature of between 35 degrees centigrade and 45 degrees centigrade.
  • the plant 1 is connected to the user 2 by a delivery line 4 in which the cooled fluid circulates, which is designed to supply the user, and by a return line 6 in which the fluid to be cooled circulates, heated by the user.
  • the plant 1 comprises at least one forced cooling device 8 cooperating with dissipation means.
  • Said cooling device 8 is suitable for being fed with said fluid to be cooled and lowering the temperature of said fluid to be cooled principally by operating said dissipation means, obtaining a fluid cooled in a forced manner.
  • said forced cooling device 8 is an air condensed chiller.
  • said air condensed chiller comprises a pump 10, a plate-type evaporator 12, an anti-ice probe G and an evaporator flow stat F.
  • said dissipation means comprise a ventilator driven by a motor, which is, for example, electric.
  • said forced cooling device 8 is suitable for cooling said fluid to be cooled using externally provided energy, for example by means of an electric motor and the like.
  • the forced cooling device 8 is fluidically connected to a delivery line for forced cooling 14, into which the fluid cooled in a forced manner is sent, and to a return line for forced cooling 16, from which the fluid to be cooled is fed to said device 8.
  • the plant 1 also comprises an accumulation and distribution device 20 suitable for accumulating said fluid cooled in a forced manner and distributing said fluid cooled in a forced manner to the users.
  • said device 20 is suitable for receiving said fluid to be cooled from the users to distribute it to said devices 8 for forced cooling.
  • said accumulation and distribution device 20 comprises a tank 22 suitable for accumulating said cooled fluid.
  • said device 20 comprises a separator 24 suitable for distributing said cooled fluid to the users.
  • Said tank 22 is fed by said delivery line 14 for forced cooling.
  • Said tank 22 feeds said separator 24.
  • Said separator 24 feeds at least one delivery line 26 to a mixing point with said fluid cooled in a forced manner.
  • said separator 24 is suitable for receiving said fluid to be cooled from the users to distribute it to said devices 8 for forced cooling. Said separator 24 feeds said return line 16 for forced cooling.
  • said accumulation and distribution device 20 preferably comprises a temperature probe T1, which intercepts said return line for forced cooling. Moreover, said accumulation and distribution device 20 comprises a temperature probe T2, which intercepts said supply line from the tank 22 to the separator 24.
  • said plant 1 comprises at least one non forced cooling device 30.
  • Said cooling device 30 is suitable for being fed with said fluid to be cooled and lowering the temperature of said fluid to be cooled principally by exposing said fluid to be cooled to the atmosphere, obtaining a fluid cooled in a non forced manner.
  • said device 30 comprises at least one discharger 32, for example in the form of a finned battery, in which the fluid to be cooled is cooled by exposure to the air.
  • said non forced cooling device 30 enables the heat of the fluid to be cooled to be discharged into the atmosphere, without the intervention of motors to drive pumps and the like.
  • Said discharger 32 is preferably drainable. In other words, when not in use, the fluid contained in the discharger 32, suitably positioned at a fixed height, is drained, for example to prevent the fluid from freezing.
  • Said discharger 32 is fed by said fluid to be cooled by a return line for non forced cooling 34 and feeds a delivery line for non forced cooling 36 with said fluid cooled in a non forced manner.
  • the plant 1 comprises a compensation device 40 suitable for being connected to said forced cooling device 8 and to said non forced cooling device 30 to cool variable quantities of fluid to be cooled in a forced manner to satisfy the need for cooled fluid of said user 2.
  • the compensation device 40 comprises a collector 42 fluidically connected to said return line 6, to said return line for forced cooling 16, to said delivery line for non forced cooling 36 and to said return line for non forced cooling 34.
  • said collector 42 is fed by said return line 6 and by said delivery line for non forced cooling 36 and feeds said return line for forced cooling 16 and said return line for non forced cooling 34.
  • said compensation device 40 comprises an inverter circulator for non forced cooling 44 set along said delivery line for non forced cooling 36.
  • said compensation device 40 comprises an inverter circulator for non forced cooling 46 and, preferably, a flow stat F, set along said return line for non forced cooling 34.
  • said compensation device 40 preferably comprises at least one tank 48 introduced at the fluidic connection between said collector 42 and said non forced cooling device 30.
  • Said tank 48 defined by one single side wall, preferably comprises two areas: a first cold area 50a and a second hot area 50b, which are separated from each other, for example by means of a separator or a wall.
  • Said cold area 50a feeds said collector 42 and is fed by said delivery line for non forced cooling 36.
  • Said hot area 50b is fed by said collector 50b and feeds said return line for non forced cooling 34.
  • said compensation device 40 is preferably connected to a filling line 52, on which an electric valve is preferably set for filling the plant, in particular for filling the tank 48, even more in particular, for filling the cold area 50a.
  • said compensation device 40 preferably comprises means for detecting the level of fluid 54, suitable for detecting the quantity of fluid circulating in the plant, for example suitable for detecting the level of fluid in a tank.
  • said detection means are suitable for detecting an operating level, an alarm level and a maximum level inside the tank 48, in particular inside the hot area 50b of said tank.
  • said compensation device 40 preferably comprises means for detecting the temperature T, for example cooperating with said tank 48, in particular with said cold area 50a for detecting the temperature of the fluid.
  • said means for detecting the temperature T are suitable for detecting an alarm temperature and a set temperature.
  • said compensation device 40 comprises mixing means 60 suitable for mixing said cooled fluid in a forced manner with fluid at a temperature greater than the temperature of the fluid cooled in a forced manner to obtain a cooled fluid with a temperature suitable for the user needs.
  • said mixing means 60 are fluidically connected to said return line 6, to said delivery line towards a mixing point 26 and to said delivery line 4.
  • said mixing means 60 are fed by said return line 6 and by said delivery line to a mixing point 26 and feed said delivery line 4.
  • Said mixing means 60 preferably comprise a three way modulating mixing valve, controlled, for example, by a temperature detector T3 set along the delivery line 4.
  • said mixing means comprise an inverter circulator controlled by a pressure transducer P2.
  • the user feeds the plant with the fluid to be cooled by the return line 6. Said fluid to be cooled is partially drawn to feed the mixing valve 62. The remaining part of the fluid to be cooled feeds the collector 42. In the collector 42, the fluid to be cooled mixes with the fluid cooled in a non forced manner, obtaining an intermediate cooled fluid.
  • the intermediate cooled fluid is sent, in part, to the non forced cooling device 30, for example first passing through the tank 48, in particular through the hot area 50b.
  • the non forced cooling device 30 cools said intermediate fluid to be cooled, obtaining the fluid cooled in a non forced manner, which is guided to feed the collector 42, for example after passing through the tank 48, in particular through the cold area 50a.
  • the remaining part of the intermediate cooling fluid is sent to the forced cooling device 8, for example after passing through the accumulation and distribution device 20, for example through the separator 24.
  • the forced cooling device 8 cools said intermediate fluid to be cooled obtaining the fluid cooled in a forced manner.
  • the fluid cooled in a forced manner is sent to the mixing valve 62, for example after passing through the accumulation and distribution device 20, in particular after being accumulated in the tank 22 and after being passed through the separator 24.
  • the fluid on which said forced cooling device 8 operates is a fluid that is already partially cooled by mixing the fluid to be cooled with the fluid cooled in a non forced manner, obtaining said intermediate fluid to be cooled.
  • the forced cooling device 8 operating for example with electric energy, only operates to cool said intermediate fluid for a non-refrigeratable part only by using the non forced cooling device 30.
  • the temperature of the fluid cooled in a non forced manner is too high due to the poor cooling action that can be obtained only with the non forced cooling devices, so, if mixed with the fluid to be cooled, you obtain an intermediate fluid to be cooled, which requires a considerable use of the forced cooling device 8 in order to be brought to the temperature required for a cooled fluid.
  • the temperature of the fluid cooled in a non forced manner is sufficiently low due to the good cooling action that can be obtained only with the non forced cooling devices, so, if mixed with the fluid to be cooled, you obtain an intermediate fluid to be cooled, which only requires limited use of the forced cooling device 8 in order to be brought to the temperature required for a cooled fluid.
  • Figure 2 represents an embodiment variation of a plant according to the present invention.
  • the plant 1 is suitable for supplying a first cooled fluid to a first user 2a, for example with a temperature included in a first range of temperatures, and a second cooled fluid to a second user 2b, for example with a temperature included in a second range of temperatures.
  • said compensation device 40 comprises a direct delivery line 4b, which feeds said first user 2a with fluid cooled in a non forced manner. Moreover, said compensation device 40 comprises a direct return line 6b fed by said fluid to be cooled from said first user 2a.
  • Said direct delivery line 4b is fluidically connected to said tank 48, in particular to said cold area 50a, whilst said direct return line 6b is fluidically connected to said tank 48, in particular to said hot area 50b.
  • Said compensation device 40 preferably also comprises an inverter circulator 70, cooperating with a pressure transducer P1, set along said direct delivery line 4b.
  • Figure 3 represents a further embodiment of the plant 1 according to the present invention.
  • the plant 1 comprises a water condensed forced cooling device 8b.
  • Said device 8b comprises a primary circuit fed by said return line for forced cooling 16 and feeds said delivery line for forced cooling 14.
  • the primary circuit comprises a pump, a plate-type evaporator, an anti-ice probe G and an evaporator flow stat F.
  • said device 8b comprises a secondary circuit fed by said direct delivery line 4b of the compensation circuit 40 and feeds said direct return line 6b of said compensation circuit 40.
  • Said primary circuit and said secondary circuit cooperate together, for example, by means of a gas cycle, to cool said fluid to be cooled.
  • Figure 4 shows a further variation of the plant according to the present invention.
  • the plant 1 is suitable for being connected to a first user 2a and to a second user 2b and, also comprises an air condensed forced cooling device 8b.
  • the compensation device 40 comprises a direct delivery line to the user 4c and a direct delivery line to the cooling 4d. Furthermore, the compensation device 40 comprises said direct return line 6b.
  • Figure 5 represents a further embodiment variation of said plant according to the invention.
  • said accumulation and distribution device 20 comprises a delivery line to the departments 80 and a return line from the departments 82, connected to a further user, for example for conditioning the areas of the departments such as offices, warehouses and the like.
  • Said delivery line to the departments 80 is fed by said separator 24 and said return line from the departments feeds said separator 24.
  • Figure 6 represents a further embodiment variation of the plant according to the present invention.
  • said mixing means 60 comprise a moderate cooling delivery line 4e, which feeds said mixing valve 62.
  • Said moderate cooling delivery line comprises a mixing point, where an additional non forced delivery line 4f and an additional forced delivery line 4g converge.
  • Said additional non forced delivery line 4f is fed with fluid cooled in a non forced manner, for example drawn from said cold area 50a of the tank 48.
  • Said additional forced delivery line 4g is fed with fluid cooled in a forced manner, for example drawn from said separator 24.
  • Figure 7 shows a further embodiment variation of the plant according to the present invention.
  • said compensation device 40 comprises an emergency device 80.
  • Said emergency device 80 comprises a by-pass delivery line 82, which connects the delivery line 4 of the second user 2b to the delivery line 4 of the first user 2a, wherein the temperature of the fluid in the delivery line 4 of the second user 2b is lower than the temperature of the fluid in the delivery line 4 of the first user 2a.
  • said emergency device 80 comprises a by-pass return line 84, which connects the return line 6 of the first user 2a to the return line 6 of the second user 2b.
  • Figure 8 represents a further embodiment variation of the plant according to the present invention.
  • the tank 48 of the compensation device 40 is an underground tank.
  • the compensation device 40 is a module that is separable and connectable, according to the needs, to said forced cooling device 8, 8b, to said non forced cooling device 30 and to said users 2, 2a, 2b.
  • said compensation device comprises the tank 48 defined by the side wall and comprising the areas 50a, 50b.
  • the delivery and/or return lines towards the forced and non forced cooling devices and towards the users are contained along the side wall.
  • the collector 42 is also contained.
  • the mixing means are also contained.
  • the compensation device makes an energy saving, since it alters the amount of the action of the forced cooling devices, which absorb electric energy, or deriving from fuels, based on the effectiveness of the non forced cooling devices.
  • the effectiveness of the forced cooling devices is more reduced the greater the possibility is to cool a fluid by exposure to the atmosphere.
  • the compensation device is made as an independent module, suitably connectable and disconnectable, according to the needs.
  • the compensation device allows the water dischargers to drain, preventing the water from freezing.
  • the accumulation and distribution device is also made in the form of an independent module, and can be connected and disconnected, according to the needs.
  • the forced and non forced cooling devices are also made in the form of independent modules, and can be connected and disconnected, according to the needs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
EP05425419A 2005-06-10 2005-06-10 Dispositif à compensation pour une installation de refroidissement Withdrawn EP1731858A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05425419A EP1731858A1 (fr) 2005-06-10 2005-06-10 Dispositif à compensation pour une installation de refroidissement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05425419A EP1731858A1 (fr) 2005-06-10 2005-06-10 Dispositif à compensation pour une installation de refroidissement

Publications (1)

Publication Number Publication Date
EP1731858A1 true EP1731858A1 (fr) 2006-12-13

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EP05425419A Withdrawn EP1731858A1 (fr) 2005-06-10 2005-06-10 Dispositif à compensation pour une installation de refroidissement

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440862A4 (fr) * 2009-06-06 2016-05-11 Ibm Infrastructure de refroidissement mettant en uvre une combinaison de refroidissement naturel et solaire

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5360748A (en) * 1976-11-12 1978-05-31 Daikin Ind Ltd Cooling device
US4481790A (en) * 1982-05-19 1984-11-13 Sulzer Brothers, Ltd. Cooling system
US4932221A (en) * 1988-05-09 1990-06-12 Mitsubishi Denki Kabushiki Kaisha Air-cooled cooling apparatus
EP0467189A2 (fr) * 1990-07-20 1992-01-22 Siemens Nixdorf Informationssysteme Aktiengesellschaft Unité d'eau froide avec ajustement de la performance
JPH04151477A (ja) * 1990-10-16 1992-05-25 Fuji Electric Co Ltd 水冷式冷却装置の貯水タンク
EP0677712A2 (fr) * 1994-04-15 1995-10-18 FRIGEL FIRENZE S.r.l. Unité stabilisée de conditionnement, en particulier pour des installations individuelles
JPH1114223A (ja) * 1997-06-18 1999-01-22 Toyo Eng Works Ltd タンクを備える冷却設備
DE19748985A1 (de) * 1997-11-06 1999-05-27 Reisner Gmbh Kaeltetechnischer Kühlanlage
JP2000318124A (ja) * 1999-05-07 2000-11-21 Offset Printing System Kk オフセット印刷機用冷水製造装置
WO2001059376A1 (fr) * 2000-02-09 2001-08-16 Department Of The Environment & Heritage Procede et appareil de refrigeration
EP1134523A1 (fr) * 2000-03-16 2001-09-19 RC Group S.p.A. Unité de réfrigération avec "refroidissement gratuit", configuré aussi pour fonctionner avec un débit variable; système et procédé
US20020002832A1 (en) * 2000-01-07 2002-01-10 Thomas Krauter Cooling installation
US20020066280A1 (en) * 2000-12-06 2002-06-06 Innotech Corporation Chilling system
JP2004251486A (ja) * 2003-02-18 2004-09-09 Innotech Corp チラー装置

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5360748A (en) * 1976-11-12 1978-05-31 Daikin Ind Ltd Cooling device
US4481790A (en) * 1982-05-19 1984-11-13 Sulzer Brothers, Ltd. Cooling system
US4932221A (en) * 1988-05-09 1990-06-12 Mitsubishi Denki Kabushiki Kaisha Air-cooled cooling apparatus
EP0467189A2 (fr) * 1990-07-20 1992-01-22 Siemens Nixdorf Informationssysteme Aktiengesellschaft Unité d'eau froide avec ajustement de la performance
JPH04151477A (ja) * 1990-10-16 1992-05-25 Fuji Electric Co Ltd 水冷式冷却装置の貯水タンク
EP0677712A2 (fr) * 1994-04-15 1995-10-18 FRIGEL FIRENZE S.r.l. Unité stabilisée de conditionnement, en particulier pour des installations individuelles
JPH1114223A (ja) * 1997-06-18 1999-01-22 Toyo Eng Works Ltd タンクを備える冷却設備
DE19748985A1 (de) * 1997-11-06 1999-05-27 Reisner Gmbh Kaeltetechnischer Kühlanlage
JP2000318124A (ja) * 1999-05-07 2000-11-21 Offset Printing System Kk オフセット印刷機用冷水製造装置
US20020002832A1 (en) * 2000-01-07 2002-01-10 Thomas Krauter Cooling installation
WO2001059376A1 (fr) * 2000-02-09 2001-08-16 Department Of The Environment & Heritage Procede et appareil de refrigeration
EP1134523A1 (fr) * 2000-03-16 2001-09-19 RC Group S.p.A. Unité de réfrigération avec "refroidissement gratuit", configuré aussi pour fonctionner avec un débit variable; système et procédé
US20020066280A1 (en) * 2000-12-06 2002-06-06 Innotech Corporation Chilling system
JP2004251486A (ja) * 2003-02-18 2004-09-09 Innotech Corp チラー装置

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
HAVENAAR D: "ENGERIEBESPARENDE KOUDWATERSYSTEMEN VOOR BEDRIJFSPROCESSESN EN KLIMATISERING MET FREE COOLING", KOUDE & LUCHTBEHANDELING, STANDEX PERIODIEKEN B.V.,VEENENDAAL, NL, vol. 92, no. 3, March 1999 (1999-03-01), pages 20 - 22, XP000802273, ISSN: 0925-630X *
PATENT ABSTRACTS OF JAPAN vol. 002, no. 091 (M - 028) 26 July 1978 (1978-07-26) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 438 (M - 1309) 11 September 1992 (1992-09-11) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 04 30 April 1999 (1999-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 14 5 March 2001 (2001-03-05) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440862A4 (fr) * 2009-06-06 2016-05-11 Ibm Infrastructure de refroidissement mettant en uvre une combinaison de refroidissement naturel et solaire

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