Written by Zita Laumen, April 30, 2020, 13:01 • 3 minutes to read
This device bridges the gap between a small-capacity ice machine that uses propane and a medium-capacity machine that uses CO2.
The new ice maker exhibited by Euroshop.
German manufacturer Ziegra has expanded its ice machine series to use carbon dioxide in small-capacity units, filling the gap between other models.
"This new ice machine builds a'bridge' between the [very] small capacity using propane and the medium capacity using carbon dioxide, allowing us to switch to natural refrigerants completely," Silke Schael, Ziegra Sales Director, in February At EuroShop, Ziegra announced the product at the Dusseldorf trade show in Germany.
The new CoolNat ZBE 350 RA CO2 small-capacity chip ice maker adopts the plug-and-play ROXSTRAmicro CO2 refrigeration unit of German OEM Teko, which is also launched on EuroShop. Ziegra said that this PLC-controlled device is very compact and uses two-stage compression.
Schael pointed out that propane is used in Ziegra's small machines, which have an ice-making capacity of up to 350 kg (772 lb) per 24 hours, and the cooling capacity of the refrigeration unit is only 1.5 kilowatts (0.43TR). Anything larger would need to exceed the current 150 grams (0.33 pounds) of propane charging limit in a closed circuit. So far, carbon dioxide can be used for larger production capacity, such as 15,000 kg (33,069 lb).
However, with ROXSTAmicro, Ziegra can now use carbon dioxide to reduce capacity, with a cooling capacity of 1.7kW (0.49TR) that guarantees 350 kg (772 lb) of ice per day. "This allows us to expand the supply of natural refrigerants, ultimately resulting in natural refrigerants of all capacities," Schael said.
Another advantage of the new ice maker is that it is "self-sufficient", which means that the compact CO2 refrigeration unit can be placed directly on the ice maker. However, if necessary, it can also be split and installed at a distance of up to 20m (66ft). In addition, energy can be saved due to precise frequency regulation of refrigeration and power generation. This product can also complement "IcePort", which is a mobile ice storage solution.
Ziegra is headquartered in Isenhagen near Hanover, Germany, and has branches in the United Kingdom and Spain. The company has used CO2 as a refrigerant for 15 years, and many of its ice machines are installed in supermarkets across Europe.
The working principle of the ice maker is that water freezes in the evaporator of the refrigeration unit and then breaks into small pieces. There are two different types of flake ice according to temperature: flake ice and flake ice.
The temperature of flake ice produced by the new CoolNat ZBE 350 RA CO2 machine is -0.5°C (31°F). It is a relatively moist ice, very easy to store and plastic. It is usually used to cool fish at the supermarket counter because it is plastic and does not affect the structure of the fish. In addition, the temperature is relatively high, so the fish will not be damaged by frost. Other applications include meat processing, dough cooling and saunas, and it is also very suitable for use in laboratories, such as hospitals or research institutions, for cooling samples.
On the other hand, flake ice is made at relatively low temperatures (-10°C to -5°C/14°F to 23°F) and is usually used in meat processing facilities because of its slightly lower cooling capacity Higher than flake ice.
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