Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
• • 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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
  • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
• • 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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B6/00—Compression machines, plants or systems, with several condenser circuits
  • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28B—STEAM OR VAPOUR CONDENSERS
  • F28B9/00—Auxiliary systems, arrangements, or devices
  • F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
  • F28B9/06—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
  • F24F5/0089—Systems using radiation from walls or panels
• • 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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B2339/00—Details of evaporators; Details of condensers
  • F25B2339/04—Details of condensers
  • F25B2339/047—Water-cooled condensers

Definitions

• the invention relates to a device for generating cold water for room cooling, in particular for cooling surfaces and coolers in building equipment, in particular for cooling ceilings with a refrigerator and an evaporative cooler connected in front of it, which is flowed through by liquid and air to be cooled.
• the object of the invention is to improve the cooling capacity of a device of the type mentioned at the outset with low installation and cost expenditure.
• the object is achieved in that the cooling air flow of the evaporative cooler can be acted upon with water and that the cooling liquid flows either through the condenser of the chiller or directly to the consumer or to both.
• the provision of the required cooling capacity becomes more efficient in a simple and inexpensive manner. This is particularly advantageous if larger cooling capacities, such as in summer, are required.
• the heat of condensation is removed at a low temperature level. Due to the low condensation temperature, the chiller works with a correspondingly low coefficient of performance.
• the evaporative cooler is a plate heat exchanger made of polypropylene.
• the material for the plate heat exchanger plays an important role.
• polypropylene a material is used in which no solid deposits can occur due to the use of water.
• a heat exchanger through which the water flows, is arranged in the cooling circuit on the refrigerator before the expansion valve, before the water is introduced into the air flow of the evaporative cooler.
• a further increase in the cooling capacity is possible by an air condenser upstream of the water condenser, which is arranged in particular in the exhaust air duct or the exhaust air opening of the evaporative cooler.
• Another advantage is the increase in the exhaust air temperature and the resulting reduction in the relative air humidity. This reduces the risk of condensation in the exhaust air duct. Evaporation of the aerosols present in the exhaust air after the evaporative cooler removes the basis of life for any bacteria, especially Legionella pneumophila. It is particularly advantageous here if the air condenser is arranged in the exhaust air duct of the evaporative cooler.
• Another advantage is the compactness of the system. This avoids energy losses due to the heating of the cold water pipes between the individual components of the system and the usual energy expenditure for the pumps.
• Fig. 1 shows a first embodiment
• Fig. 2 shows a second embodiment.
• the device or system has a refrigerator, with a refrigerant circuit 1, in which a compressor (compressor) 2 is arranged.
• a condenser (condenser) 3 is arranged in the flow direction behind the compressor 2 and is cooled by the second liquid circuit 4, which is described in more detail below. From the condenser 3, the refrigerant passes through an expansion valve 5 to an evaporator 6, to which a third circuit 7 is connected.
• the cooling power delivered by the evaporator 6 to the third circuit 7 is fed to a buffer store 9 via a pump 8.
• the cooling capacity of the intermediate storage 9 is via a fourth circuit 10 Cooling surface 1 1 supplied via a distribution system 12.
• the second circuit 4 connected to the condenser 3 is guided by a pump 13 through an evaporative cooler 14, which is designed as a plate heat exchanger and is resistant to contamination and corrosion.
• the plate heat exchanger 14 has air flowing through it, which passes between the plates via an inlet 15 and is released into the environment via an outlet 16. This flow is caused by a fan 17.
• water is introduced into the air flow via a distribution system 18, in particular sprayed, as a result of which the cooling capacity of the air reached in the heat exchanger is increased due to the evaporative cooling.
• a pump 19 is located in the water supply line for introducing the water.
• the intermediate store 9 can be dispensed with.
• the liquid circuit 7 then leads directly to the distribution system 12.
• a heat exchanger 25 can be used upstream of the expansion valve 5, through which the water flows, which is then fed to the distribution system 18. This enables a further improvement in the cooling performance.
• a heat exchanger 26 can be used in the cooling circuit of the refrigerator in front of the water condenser 3, through which the air which flows out of the evaporative cooler 14 flows.
• the resulting increased heat dissipation increases the overall performance of the device.
• the fact is used that the heat from the heat exchanger 14 of the refrigerator 3, 13, 14 is still more receptive to heat that comes from the same refrigeration circuit of the refrigerator.
• the device or system is preferably operated in three different stages:
• the liquid 21 to be cooled can circulate either via the heat exchanger 23 and then via the evaporator 6 of the refrigerator or by switching the valve 24 only via the evaporator 6.
• All parts of the device or system that is, all parts of the refrigeration machine, the evaporative cooler 14 and the open-loop and closed-loop control, and also all liquids and current-carrying lines, are arranged in a compact manner within a housing 20.
• the housing can consist of several easily transportable units.
• a bypass 28 bridging the water condenser 3 is arranged, through which the second liquid circuit 4 flows in partial load operation when a valve (three-way valve) 27 is opened. The condensation thus takes place only in the heat exchanger (condenser) 26.
• the compressor 2 works in several stages. This has the advantage that the circuit 4 is not thermally stressed, so that the energy consumption of the overall system is reduced.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Other Air-Conditioning Systems (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Sorption Type Refrigeration Machines (AREA)

Priority Applications (8)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26004644

Family Applications (1)

Country Status (10)

Cited By (6)

Citations (11)

• 2001
  • 2001-02-06 AT AT01902417T patent/ATE283463T1/de active
  • 2001-02-06 SK SK1246-2002A patent/SK286594B6/sk not_active IP Right Cessation
  • 2001-02-06 HU HU0300422A patent/HU228723B1/hu not_active IP Right Cessation
  • 2001-02-06 WO PCT/EP2001/001249 patent/WO2001065188A1/de active IP Right Grant
  • 2001-02-06 ES ES01902417T patent/ES2230266T3/es not_active Expired - Lifetime
  • 2001-02-06 AU AU2001230251A patent/AU2001230251A1/en not_active Abandoned
  • 2001-02-06 PT PT01902417T patent/PT1259769E/pt unknown
  • 2001-02-06 CZ CZ2002-2941A patent/CZ304827B6/cs not_active IP Right Cessation
  • 2001-02-06 EP EP01902417A patent/EP1259769B1/de not_active Expired - Lifetime
• 2002
  • 2002-08-22 NO NO20024015A patent/NO315440B1/no not_active IP Right Cessation

Patent Citations (11)

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