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WO1996016485A1 - Procede de refroidissement de secours d'une salle d'equipement dans laquelle l'equipement de refroidissement existant est hors service - Google Patents

Procede de refroidissement de secours d'une salle d'equipement dans laquelle l'equipement de refroidissement existant est hors service Download PDF

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Publication number
WO1996016485A1
WO1996016485A1 PCT/SE1995/001309 SE9501309W WO9616485A1 WO 1996016485 A1 WO1996016485 A1 WO 1996016485A1 SE 9501309 W SE9501309 W SE 9501309W WO 9616485 A1 WO9616485 A1 WO 9616485A1
Authority
WO
WIPO (PCT)
Prior art keywords
equipment
cooling
emergency cooling
heat
way
Prior art date
Application number
PCT/SE1995/001309
Other languages
English (en)
Inventor
Rolf Ulfvengren
Anders Johansson
Original Assignee
Skövde Climator Ab
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 Skövde Climator Ab filed Critical Skövde Climator Ab
Priority to EP95938677A priority Critical patent/EP0820660A1/fr
Publication of WO1996016485A1 publication Critical patent/WO1996016485A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/03—Constructional details, e.g. casings, housings
    • H04B1/036—Cooling arrangements

Definitions

  • Earth-bound versions of mobile telecommunications systems require a large number of transmission/reception stations. These stations are often placed in containers or small buildings. The working equipment emits a large amount of energy as a result of it being used. To avoid the risk of overheating, which is a great problem with this type of station, the units are equipped with cooling devices, often in the form of air conditioning. In countries with hot climates - desert areas, for example - a power failure can have serious consequences. A container holding heat-emitting equipment whose cooling is suddenly out of operation can result in the performance of the equipment stopping or being seriously impaired. There is therefore a need for emergency cooling. This emergency cooling must work without outside energy and also be effective over the time during which a power failure could be imagined.
  • phase-changing material i.e. sodium sulphate decahydrate.
  • Glauber's salt i.e. sodium sulphate decahydrate.
  • Glauber's salt has a change point at a temperature of about 30°C, when a part of the water of crystallization is lost.
  • the sodium sulphate can dissolve in the water released.
  • both the heat of crystallization and heat of transformation are absorbed.
  • energy is given off.
  • salts such as common salt, the temperature at which this phase change takes place can be reduced.
  • This invention describes a way of designing a station of limited volume containing electronic components, preferably in the field of telecommunications, in such a way that an emergency cooling capacity of passive type can be used.
  • This way consists of packing phase-changing material in material that permits a high rate of heat transfer and, at the same time, possesses sufficient impermeability so as to assure the vapour tightness of the components.
  • the packaging units shall be of a size adapted to fast absorption of surplus heat, but also for quickly giving off heat during re-transformation to the heat-absorbing state. It has been found in practice that it is advantageous to use aluminium as the packaging material.
  • the form of the unit shall be such that the volume/area ratio (square centimetres: cubic centimetres) should be between 1 and 2. A specially advantageous results have been obtained with the ratio 1.5. In addition, it has been found that the contents of the units should weigh less than 500 grams.
  • the heat absorbing units with the correct volume/area ratio shall preferably be placed above the heat generating equipment.
  • Cold outside air which is normally available at night, is used for re-cooling. It is therefore a matter of monitoring the outside temperature and allowing outdoor air to flow through system of heat-absorbing units. It has been found advantageous to use a small (smaller than 100 W) fan for transporting the cooling air past the units.
  • FIG. 1 shows a general arrangement.
  • the outside walls (1) are well insulated.
  • the upper part of the room is fitted with shelves (2) on which the units containing the phase-changing material are placed.
  • the shelves are placed so as to create a duct connected to the electrically operated fan (4) for admitting the outdoor air.
  • a fan (5) that provides an air flow through the duct.
  • the outdoor air admitted is then transported down to the vicinity of the heat-generating equipment, where a slave valve has been opened to permit the air admitted as described above to flow out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

La présente invention concerne un procédé permettant de fournir un refroidissement de secours à un local contenant un équipement qui produit de la chaleur. Le refroidissement de secours est nécessaire en cas de coupure de courant dans le local contenant un équipement qui produit de la chaleur, même durant une coupure de l'alimentation en électricité, quand la marche à l'aide de batteries entre souvent en action. Des problèmes apparaissent alors du fait que la capacité des batteries ne permet pas de faire fonctionner l'équipement de refroidissement. La présente invention porte sur un procédé permettant d'obtenir un refroidissement de secours pour un matériel ayant une capacité thermique élevée, grâce à des changements de phase. De cette manière, l'équipement qui produit de la chaleur peut fonctionner sans interruption en cas de panne de l'alimentation électrique, sans que la température maximale de fonctionnement de l'équipement soit atteinte, ce qui serait le cas sans refroidissement de secours.
PCT/SE1995/001309 1994-11-21 1995-10-26 Procede de refroidissement de secours d'une salle d'equipement dans laquelle l'equipement de refroidissement existant est hors service WO1996016485A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95938677A EP0820660A1 (fr) 1994-11-21 1995-10-26 Procede de refroidissement de secours d'une salle d'equipement dans laquelle l'equipement de refroidissement existant est hors service

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9404056-5 1994-11-21
SE9404056A SE9404056L (sv) 1994-11-21 1994-11-21 Sätt att nödkyla rum innehållande värmeemitterande utrustning

Publications (1)

Publication Number Publication Date
WO1996016485A1 true WO1996016485A1 (fr) 1996-05-30

Family

ID=20396082

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001309 WO1996016485A1 (fr) 1994-11-21 1995-10-26 Procede de refroidissement de secours d'une salle d'equipement dans laquelle l'equipement de refroidissement existant est hors service

Country Status (3)

Country Link
EP (1) EP0820660A1 (fr)
SE (1) SE9404056L (fr)
WO (1) WO1996016485A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000040915A1 (fr) * 1998-12-30 2000-07-13 Emerson Energy Systems Ab Stockage d'energie dans des systemes de refroidissement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231885A (en) * 1979-07-12 1980-11-04 Saskatchewan Minerals Thermal energy storage composition comprising peat moss
US5161389A (en) * 1990-11-13 1992-11-10 Rocky Research Appliance for rapid sorption cooling and freezing
US5271239A (en) * 1990-11-13 1993-12-21 Rocky Research Cooling apparatus for electronic and computer components

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231885A (en) * 1979-07-12 1980-11-04 Saskatchewan Minerals Thermal energy storage composition comprising peat moss
US5161389A (en) * 1990-11-13 1992-11-10 Rocky Research Appliance for rapid sorption cooling and freezing
US5271239A (en) * 1990-11-13 1993-12-21 Rocky Research Cooling apparatus for electronic and computer components

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000040915A1 (fr) * 1998-12-30 2000-07-13 Emerson Energy Systems Ab Stockage d'energie dans des systemes de refroidissement
US6571861B1 (en) 1998-12-30 2003-06-03 Emerson Energy Systems Ab Energy storage in cooling systems

Also Published As

Publication number Publication date
SE9404056L (sv) 1996-05-22
SE9404056D0 (sv) 1994-11-21
EP0820660A1 (fr) 1998-01-28

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