Portable chilling / heating units: easy to move around and attach to cooling jackets, or to internal cooling plates/coils, on one tank or on a series of tanks, for:-

• controlling the fermentation temperature
• cooling of newly pressed must for slow starting ferments
• cold stabilisation, to precipitate tartaric acid crystals
• maintaining storage temperatures in tanks (or barrels, with a barrel snake)
• larger models have a heating option, to raise the temperature (above 15 °C) in order to promote malo-lactic fermentation with red wine, or to assist the start of secondary fermentation of Sparkling Wine just before bottling.

The following units are manufactured in Germany, by the world leaders in temperature control of wine; they have been building chillers since the 1970s.

Calculating the power/size of Chilling unit necessary:-

Dabei sind noch folgende Eckdaten zu berücksichtigen:-
    1)  Gebindegröße (kleinere Tanks haben mehr Oberfläche und gären schneller durch)
    2)  Kellertemperaturen – Umgebungstemperaturen

Delta (ist die Temperaturdifferenz Soll IST beim kühlen). 
    e.g. Weinsteinausfellen: 15°C Weintemperatur soll auf 0° gebracht werden.
Delta x Tankvolumen Liter= erforderliche Kilocalorien/h.

Diesen Wert durch 860 teilen ergibt die benötigte Kw Leistung pro Stunde (also die Größe des Kühlgerätes wenn man in einer Stunde runterkühlen möchte.

Diese Wert durch die Anzahl der Stunden teilen innerhalb welcher man kühlen möchte e.g. in 5 Stunden.
15 x 3000:860:5h = ergibt die Leistung des Kühlgerätes wenn man die 3000 Liter in 5h von 15°C auf 0°C bringen möchte.

Zu beachten ist, dass die Leistung der Kühlgeräte bei niederen Temperaturen sehr stark abnimmt.
Kann bis auf 10/20% der Nennleistung runter gehen. Faustregel von Kreyer : 2 der Nominalleistung.

Für die Planung einer Kühlanlage bei der Gärung gilt folgende Faustregel:-
Diese Werte gelten für Betriebe mit viel Weisswein in Deutschland; bei uns sind etwas höhere Keller bzw. Herbsttemperaturen zu berücksichtigen.

to 15,000 litres   Chill 25
to 20,000 litres   Chill 35
to 25,000 litres   Chill 45

to 30,000 litres   Chill Max 50 (5906 Euros) or MCK 50 (7200 Euros)
to 50,000 litres   Chill Max 90 (7110 Euros) or MCK 90 (8775 Euros)
to 70,000 litres   Chill Max 110 (8888 Euros) or MCK 110 (10,755 Euros)

The MCK models are in stainless steel and have a much bigger water tank. Some of the components inside are of higher value.
The Chill Max and MCK models have heating installed as well as cooling.

Winus:-
Weinsteinstabilisierung für Weine mit hohem Alkoholgehalt ca. 1 Woche bei - 4 °C.
Weine mit geringerem Alkoholgehalt bei 0 °C ca. 10 Tage (weniger Alkohol gefriert schneller).
Die Kühlleistung nimmt bei Niedertemperaturbereich ca. um 2/3 ab. Anstatt 3 dann nur mehr 1KW Leistung.

So, for example, with 4 tanks of 3000 litres = 12,000 litres, a Chill 25 should be sufficient:-

a compact, shelf-top unit, easy to set-up and use, equipped with a hermetically sealed motor-compressor and a cooling water/glycol circuit containing water tank and centrifugal pump.
 

• Available in three models:-
      Chill 25: 705 x 510 x 450 mm, 2.1 kW, 2709 Euros
      Chill 35: 755 x 600 x 500 mm, 3830 Euros
      Chill 45: 755 x 600 x 500 mm, 4365 Euros
• Cooling capacities (at 17 °C temperature difference): 2.45 / 3.56 / 4.52 kW, (2107 / 3061 / 3887 kcal)
      pump: 7.2 / 10.0 / 12.9 litres/minute, at 2.9 / 2.6 / 2.3 bar
• Electrical connection: 220-230V/1Phase/50Hz

In operation they produce a lot of warm air, taking in lots of cool air, so ideally should be in a room adjacent to the tank room which will benefit from heating.

The Chill 25 unit has an 18 litre open tank, which can be filled only with water, however, using a water/glycol mixture allows much lower temperatures to be achieved and also gives frost protection in the winter. They say that the glycol should be 'food grade'. A mixture of 30% glycol and 70% clean water should be sufficient, but 50% / 50% allows even lower temperatures. The total volume, in the tank, connecting tubing and cooling jackets, may be 30 to 40 litres.

The connecting tubing, in a ring, should be 19/20mm internal diameter, with T-pieces to and from each cooling jacket. The cooling jackets should have 1" or ¾" bsp thread hose-tails on inlet and outlet (top). To avoid wasting power the tubing should be insulated, using normal pipe insulation.

Also there are the necessary regulators and inter-connections between the 4 tanks and the chiller unit:-

1 overflow prevention kit @ 171 Euros, not needed if the unit is installed higher than the cooling jackets.
This prevents residual water from the pipes of open water systems to over-flood the cooling unit's integrated water-tank when the pumps are switched off. Consists of solenoid valve 3/4"-230V, non-return valve 3/4" and solenoid connection (230V, 2m cable).
             and Fermfix:    

4 FermFix temperature controllers @ 167 Euros each.
These temperature controllers are installed directly into the tanks, into a normal ½" thermometer probe.
The wine maker can set or re-set the required temperature on each tank. As a safety measure, it is possible to determine a temperature range above or beneath which an optical alarm will be given.
The controller's double display shows the actual and pre-set temperature in separate displays.
   • Temperature range: - 9.9 °C up to + 99.9 °C
   • Voltage: 24 V / AC +/- 10%
   • Output: solenoid valve 24 V AC / 16 VA
   • Mode of operation: cooling, heating, cooling and heating, display, off
   • Controller's structure: 3-Points, PI, PID
   • Electric connection: 6 m cable with open end or jack/ plug 
   • Protection type: IP 65

4 x electrical cables @ 26 Euros each
4 filters @ 17 Euros each
1 transformer for 10 regulators @ 108 Euros
Assemby ready for installation @ 180 Euros

So the total price of a Chill 25 with temperature controllers for 4 tanks = 4676 Euros
plus the connecting tubing, insulation, hose-tails, T-pieces, glycol etc.

Prices shown are exclusive of Vat.
Delivery will usually need to be charged at cost.

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