EP1236961B1 - Flüssiglebensmittelkühlanlage - Google Patents
Flüssiglebensmittelkühlanlage Download PDFInfo
- Publication number
- EP1236961B1 EP1236961B1 EP01105006A EP01105006A EP1236961B1 EP 1236961 B1 EP1236961 B1 EP 1236961B1 EP 01105006 A EP01105006 A EP 01105006A EP 01105006 A EP01105006 A EP 01105006A EP 1236961 B1 EP1236961 B1 EP 1236961B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- cooler
- direct
- switching device
- ice storage
- 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.)
- Expired - Lifetime
Links
Images
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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- 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
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
Definitions
- the invention relates to a liquid food cooling system, in particular for milk, with a coolant circuit, the a direct cooler, an ice storage and a refrigeration unit includes.
- direct cooler in addition to the ice storage a direct acting radiator (direct cooler) to provide, too load peaks exceeding the capacity of the ice storage or insufficient storage of ice sufficient To ensure cooling of the milk.
- the direct cooler which is designed as a plate cooler, for example, is only designed for short-term operation and therefore in comparison dimensioned much smaller to the ice storage cooler. Although one can not do this with the additional direct cooler sufficient capacity of the ice storage compensated for a short time but this is also a continuous operation the milk cooling system not accessible. It also leads the provision of an additional direct cooler to even higher Acquisition and operating costs.
- a liquid food refrigeration system is known from US 2 512 576.
- the invention is based on the object, a liquid food cooling system to create the type mentioned, the less expensive and more applicable.
- Liquid foods are foods and stimulants understood in the liquid state.
- An ice storage is a cooler, in a Auf official Sea Refrigerant is supplied to ice formation while in a cooling operation, the coolant passed through the radiator and is cooled by the ice.
- a direct cooler is a cooler in which supplied refrigerant directly for cooling a medium to be cooled is used.
- the refrigeration unit Under a refrigeration unit is a reduced around the radiator Chiller understood.
- the refrigeration unit includes a compressor, a condenser and at least one Throttle valve.
- the ice storage is for a smaller cooling capacity as the direct cooler and for a greater cooling capacity dimensioned as a minimum cooling capacity of the direct cooler.
- the liquid food cooling system over a wide cooling power requirement range in direct cooling mode operate. Besides, it can be at low Cooling power requirement, which fell below the minimum cooling capacity is switched to the memory cooling mode and the direct cooler are switched off. That has the advantage, that the liquid food cooling system on the one hand longer in the more energy-efficient direct cooling operation can work and on the other hand also better adaptable to load fluctuations. Furthermore can thus in its acquisition costs and also in the Operation more expensive ice storage smaller than in liquid food refrigeration systems dimensioned according to the prior art become.
- the refrigeration unit with the Direct cooler connected will only in exceptional cases connected to the ice storage.
- the ice storage then serves only for cooling at below the minimum cooling capacity lying cooling power requirement or to cover peak loads.
- the direct cooler will therefore both in terms of performance supplemented above and below by the ice storage; in spite of this variability according to the invention is a total of only one Refrigeration unit required.
- the direct cooler is designed as a trickle cooler.
- the trickle cooler has opposite other types have the advantage of being over a wide Adjust the range to the respective load. In contrast to Plate coolers or tube bundle coolers, the only one Adjustment range of about 10 to 15%, fits the Trickle cooler to load changes up to 30%, under certain circumstances up to 50%.
- the trickle cooler can also be used at lower temperatures (about 0.5 ° C) as a plate cooler (2 ° C). While plate or tube cooler at too low load can be destroyed by ice formation, there is this danger with trickle coolers not or only to a very small extent, since they only freeze at lower loads and also even then will not be destroyed. The trickle cooler is therefore better applicable and more reliable.
- the switching device an evaporating temperature door acting on the refrigeration unit on.
- the Evaporation temperature which for both the cooling capacity also the efficiency of the cooling device of decisive Meaning is, can be adjusted.
- This is special in an inventive operation of the same refrigeration unit with different coolers of advantage. Underlying is the Recognizing that different types of radiators are different Require evaporation temperatures.
- the switching device is therefore designed so that when the direct cooler with connected to the refrigeration unit, the evaporation temperature to one suitable for operation with the direct cooler Value is set while for operation with the Ice storage the evaporation temperature on one for the Ice storage appropriate value is set. In this way can use one and the same refrigeration unit, the two coolers despite their different design and their different Requirements for the evaporation temperature with favorable Efficiency can be operated.
- a plurality of Cooling devices provided, each having a direct cooler and have a refrigeration unit, preferably three cooling devices.
- a refrigeration unit preferably three cooling devices.
- With the majority of cooling facilities is one more better adaptation of the liquid food cooling system to the respective cooling power requirement possible.
- With low cooling capacity requirement then needs, for example, only one of the cooling devices to be on; at medium cooling capacity requirement then, for example, two of the cooling devices and finally with higher cooling power requirements, all of the Cooling devices. It has proven particularly useful, three coolers and to provide refrigeration units; with lower requirements to the adaptability to the respective cooling power requirement two can be enough.
- the cooling devices are different Cooling capacities dimensioned. In this way can be even finer with the same number of cooling devices Adaptation of the respectively connected cooling capacity to the Cooling power required.
- one of the cooling devices to cover a base load requirement dimensioned. It turns out that even at a fluctuating load profile often has a load value, apart from load breaks nearly the entire time is present. This load value is also called base load designated. This ensures that at least for the frequent occurring base load a suitably dimensioned direct cooling device is available.
- a liquid food cooling system is as Milk cooling system running. It includes a cooling water circuit 1, a direct cooler 2, an ice storage 3, changeover valves 4, a refrigeration unit 5 and a switching device 6. Der Direct cooler 2 and the ice storage 3 are both connected to the cooling water circuit 1 connected.
- the cooling water circuit is via a heat exchanger, not shown, with the zu cooling milk, or another liquid to be cooled Food, in contact is closed.
- Embodiment further flows a refrigerant through the Direct cooler 2, the ice storage 3, the switching valves 4 and the refrigeration unit 5.
- the direct cooler 2 is in the illustrated embodiment designed as a trickle cooler. Inside the direct cooler 2 are a heat exchanger plate 21 and a trickle system 22 arranged. The trickle system is via a supply line 23 and a return line 24 with the switching valves 4 connected.
- the ice storage 3 has in its interior Pipe / plate system 31, the tubes connected to each other and where ice can be stored. The Pipe / plate system 31 is connected via a feed line 32 and a Return line 33 connected to the switching valves 4.
- the switching valves 4 serve as an actuator that between two positions can be switched. Except for the supply and return lines 23, 24, 32, 33 are one to the refrigeration unit 5 leading low pressure line 58 and one of the refrigeration unit 5 coming high-pressure line 59 to the switching valves. 4 connected. Through them circulates the refrigerant.
- the changeover valves 4 connect in a first position the feeding and return lines 23, 24 with the low pressure and High pressure line 58, 59; connect in a second position they supply the supply return lines 32, 33 with the low pressure and high-pressure line 58, 59.
- the switching valves 4 are by means of a control line 41 connected to the switching device 6.
- the refrigeration unit 5 comprises a compressor 51, which with a Motor 52 is connected and driven by this, a capacitor 54 and a control valve 56.
- the low pressure line 58 is connected to a low pressure side of the compressor 51.
- To a high pressure side of the compressor is over a high-pressure line 53 is connected to one side of the capacitor 54; the other side of the capacitor 54 is over a Line 55 is connected to one side of the pressure regulating valve 56.
- a control line 57 is provided which the pressure control valve 56 connects to the switching device 6.
- the switching device 6 is connected via lines 63, 65 with sensors 64, 66 for temperature or flow rate of the cooling water in the Cooling water circuit 1 connected. Alternatively or in addition appropriate sensors can also be used to measure such Parameters of the milk be provided.
- the switching device 6 acts via a control line 62 to the drive motor 52 of the refrigeration unit 5 and via the control line 41 to the changeover valves 4 on.
- the switching device 6 also has a Load profile memory 61 on.
- the device is operated as follows.
- the coolant flows in the cooling water circuit 1 from the milk heat exchanger (not shown) back to the direct cooler 2 and the ice storage 3.
- the temperature or flow rate of the coolant is detected via the sensors 64, 66 and at the switching device 6 transmitted. From this data as well as from the determined in the memory device 61 stored load profile the switching device 6, the cooling power for cooling the delivered milk is required and that determines the Operating mode of the cooling devices 7, 7 '.
- the switching device 6 selects from the coolers 2, 3 those whose cooling capacity closest to the required cooling capacity requirement comes.
- the direct cooler 2 is selected becomes. It is then on the control line 41 a signal the change-over valves 4 issued by this in the first Switch position. In this position, the high-pressure and low pressure lines 58, 59 with the supply and return lines Connected 23, 24 of the direct cooler. This is the Direct cooler 2 connected to the cooling unit 5. The refrigerant then circulates in the refrigerator 5 and direct cooler 2 formed circuit via the switching valves. 4 About the control line 62 of the drive motor 52 of the refrigeration unit driven. About the control line 57 controls the Switching device 6, the control valve 56. The control is carried out in such a way that the refrigeration unit 5 to an evaporation temperature in the range of -4 ° C to -2 ° C is set. In this mode the milk is delivered via the cooling water circuit 1 and the direct cooler 2 and the cooling unit 5 connected to it with a good efficiency to the desired temperature cooled from about 0 to 1 ° C.
- the Switching device 6 controls the changeover valves via the control line 41 4 so that it switches to its second position.
- the switching device 6 outputs a suitable control signal the control line 41 to the switching valves 4 off. Further the switching device 6 is a corresponding signal on the Control line 62 to the drive motor 52 from.
- the refrigeration unit 5 is now connected to the ice storage 3 and the refrigerant circulates in the cycle thus formed.
- the direct cooler 2 is switched off.
- the switching device controls 6 via the control line 57, the pressure control valve 56 such assume that an evaporation temperature in the range of -15 to -8 ° C results.
- the ice storage 3 in Auf alt love operate. This mode is above all makes sense if there is practically no cooling power requirement; so in a load break. It can last until the Last break ends or until the ice storage 3 a maximum accumulation with ice has reached.
- the switching device 6 switches then by means of the control line 62, the drive motor 52 of the Refrigeration unit 5 from.
- the switching device 6, the refrigeration unit also switch off when no or only a small cooling power requirement below the minimum performance and the Ice storage 3 has sufficient ice.
- the ice storage 3 then cools in storage mode.
- the switching valves 4 can be designed so that they also intermediate positions can take in which both coolers 2, 3 with the refrigeration unit are connected.
- Fig. 2 is a second embodiment of the invention Liquid food cooling system shown.
- There are a total of three cooling devices (7, 7 ', 7' ') are provided, whose Structure corresponds to that shown in FIG. 1, wherein for all cooling devices only one switching device 6 ' is provided.
- the third cooling device (7 '') is different constructed, here no ice storage 3 is provided.
- This selection unit 69 is designed to be dependent on the required Cooling power to select those coolers whose added together Cooling capacity of the required cooling capacity on next is coming.
- the cooling devices 7, 7 ', 7' ' connect to the cooling water circuit, and are so free and access to the selected cooling equipment closes it to the non-selected cooling devices.
- the cooled by the cooling means 7, 7 ', 7' 'cooling water flows into a collection tank 9, in which the ice storage 3, 3 ' from which it is again in the cooling water circuit 1 arrives.
- the liquid food refrigerator according to the second embodiment is operated as follows. Based on sensors 64, 65 and a stored in a memory device 61 Load profile, the required cooling capacity is determined. The determined over a period of 24 hours required cooling capacities are given by way of example in Fig. 3 shown.
- the switching device 6 selects by means of Selection unit 69 those cooling devices whose added Cooling capacity of the required cooling capacity the next comes. For this purpose, the switching device 6 controls the valves 8, 8 ', 8 '' and the switching valves 4, 4 'accordingly.
- FIG. An example of such a selection is shown in FIG. It is assumed that the cooling device 7 a Power in direct cooling mode of 2300 kW, the cooling device 7 'a power in direct cooling mode of 1600 kW and the cooling device 7 '' a performance in direct cooling mode of 1700 kW.
- the narrow columns stand for the in required cooling capacity during the respective period, during the shaded areas the operating times of each Cooling devices 7, 7 ', 7' 'represent.
- the the hatched areas upwards bordering line shows the used power in direct cooling mode.
- In the load profile will be in the early "Phase I" period Needs a cooling power from about 3:00 to 6:00 h, which most closely corresponds to that of the cooling device 7 ".
- the switching device 6 therefore switches on this cooling device.
- Phase II In the period called "Phase II" from about 6:00 to 8:00 h, the cooling power demand increases, so that to his Cover the combination of the cooling devices 7 'and 7' 'on best is.
- the switching device 6 now switches the cooling devices 7 'and operates them in direct cooling mode.
- Phase III is the cooling power requirement so far increased that now a combination from the cooling devices 7 and 7 "in the direct cooling mode best meets the cooling performance requirements.
- the switching device 6 switches to the cooling device 7 and separates the now no longer required cooling device 7 'by means of the valve 8 'from the cooling water circuit 1 from.
- Phase V Partial load peaks occur during which the cooling power requirement is higher than the cooling capacities of the cooling devices 7, 7 'and 7 "taken together, which is shown in FIG to recognize that the thin column over the hatched Areas bordering line goes out. According to the invention can despite this load peaks sufficient cooling thanks the ice storage 3 ', possibly also achieved by the ice storage 3 become.
- phases VI-XI reduced the required cooling capacity and the switching device. 6 switches cooling devices 7, 7 ', 7' 'in a corresponding manner on or off.
- phase "XII” the cooling device 7 'and 7 of the switching device 6 in the Auf argument shall switched to the ice storage 3 'and 3 in anticipation to store the next phase “XII” with ice.
- phase “XII” reduces the cooling capacity requirement below the minimum power limit the smallest direct cooler.
- the power of the cooling device 7 '' was chosen so that apart from “Phase XI” and “Phase XII "can go through the entire time in direct cooling mode; this means that this cooling device on the base load requirement is tuned.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- General Preparation And Processing Of Foods (AREA)
Description
- Fig. 1
- die erfindungsgemäße Flüssiglebensmittelkühlanlage gemäß einem ersten Ausführungsbeispiel;
- Fig. 2
- die erfindungsgemäße Flüssiglebensmittelkühlanlage gemäß einem zweiten Ausführungsbeispiel mit mehreren Kühleinrichtungen;
- Fig. 3
- ein Lastprofil und die daraus abgeleitete Auswahl von Kühlern gemäß dem der Erfindung zugrundeliegenden Verfahren.
Claims (5)
- Flüssiglebensmittelkühlanlage, insbesondere für Milch, mit einem Zwischenkühlmittelkreislauf (1), der einen Direktkühler (2), einen Eisspeicher (3) und ein Kälteaggregat (5) aufweist, wobei eine Schalteinrichtung (6) mit einem Stellglied (4) vorgesehen ist, die dazu ausgebildet ist, das Kälteaggregat (5) wahlweise mit dem Direktkühler (2) oder mit dem Eisspeicher (3) zu verbinden,
dadurch gekennzeichnet, dass
der Direktkühler (2) als ein Rieselkühler ausgeführt ist und der Eisspeicher (3) für eine kleinere Kühlleistung als die Nennleistung des Direktkühlers (2) und für eine größere Kühlleistung als eine Mindestleistung des Direktkühlers (2) dimensioniert ist. - Flüssiglebensmittelkühlanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Kälteaggregat (5) einen Verdampfungstemperatursteller (54) aufweist, auf den die Schalteinrichtung (6) einwirkt.
- Flüssiglebensmittelkühlanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Mehrzahl von Kühleinrichtungen (7, 7', 7''), die je einen Direktkühler (2, 2', 2'') und ein Kälteaggregat
(5, 5', 5'') aufweisen, vorgesehen sind, vorzugsweise in einer Anzahl drei. - Flüssiglebensmittelkühlanlage nach Anspruch 3, dadurch gekennzeichnet, dass die Kühleinrichtungen (7, 7', 7'') für unterschiedliche Kühlleistungen dimensioniert sind.
- Flüssiglebensmittelkühlanlage nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass eine der Kühlanlagen (7'') zur Deckung eines Grundlastbedarfs dimensioniert ist.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50107275T DE50107275D1 (de) | 2001-03-01 | 2001-03-01 | Flüssiglebensmittelkühlanlage |
ES01105006T ES2248178T3 (es) | 2001-03-01 | 2001-03-01 | Instalacion de refrigeracion para productos alimenticios liquidos. |
EP01105006A EP1236961B1 (de) | 2001-03-01 | 2001-03-01 | Flüssiglebensmittelkühlanlage |
AT01105006T ATE303568T1 (de) | 2001-03-01 | 2001-03-01 | Flüssiglebensmittelkühlanlage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01105006A EP1236961B1 (de) | 2001-03-01 | 2001-03-01 | Flüssiglebensmittelkühlanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1236961A1 EP1236961A1 (de) | 2002-09-04 |
EP1236961B1 true EP1236961B1 (de) | 2005-08-31 |
Family
ID=8176637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01105006A Expired - Lifetime EP1236961B1 (de) | 2001-03-01 | 2001-03-01 | Flüssiglebensmittelkühlanlage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1236961B1 (de) |
AT (1) | ATE303568T1 (de) |
DE (1) | DE50107275D1 (de) |
ES (1) | ES2248178T3 (de) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE663713C (de) * | 1936-03-08 | 1938-08-12 | Lufttechnische Ges M B H | Verfahren und Vorrichtung zur Kuehlung der Luft einer Klimaanlage durch eine Kaeltemaschine |
US2512576A (en) * | 1947-10-29 | 1950-06-20 | Mojonnier Bros Co Inc | Refrigerating method and apparatus |
DE2224824A1 (de) * | 1972-05-20 | 1973-11-29 | Baum Verfahrenstechnik | Fluessigkeitsfilter zur abscheidung feinster schwebestoffe |
US4463574A (en) * | 1982-03-15 | 1984-08-07 | Honeywell Inc. | Optimized selection of dissimilar chillers |
DE3228934C2 (de) * | 1982-08-03 | 1985-03-28 | Adolf H. 7410 Reutlingen Kirn | Vorrichtung zum Kühlen von Flüssigkeit |
US4483152A (en) * | 1983-07-18 | 1984-11-20 | Butler Manufacturing Company | Multiple chiller control method |
US4637219A (en) * | 1986-04-23 | 1987-01-20 | Enron Corp. | Peak shaving system for air conditioning |
US5090207A (en) * | 1987-02-06 | 1992-02-25 | Reaction Thermal Systems, Inc. | Ice building, chilled water system and method |
JPH071128B2 (ja) * | 1987-02-27 | 1995-01-11 | 株式会社東芝 | 冷蔵庫用冷凍サイクル |
US4907417A (en) * | 1988-03-21 | 1990-03-13 | Emerson Electric Co. | Refrigeration control system for cold drink dispenser |
-
2001
- 2001-03-01 AT AT01105006T patent/ATE303568T1/de not_active IP Right Cessation
- 2001-03-01 EP EP01105006A patent/EP1236961B1/de not_active Expired - Lifetime
- 2001-03-01 DE DE50107275T patent/DE50107275D1/de not_active Expired - Lifetime
- 2001-03-01 ES ES01105006T patent/ES2248178T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE303568T1 (de) | 2005-09-15 |
DE50107275D1 (de) | 2005-10-06 |
EP1236961A1 (de) | 2002-09-04 |
ES2248178T3 (es) | 2006-03-16 |
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