The ideal solution for small and medium-sized retailers
The MT Chiller cools the secondary fluid at a temperature that dynamically varies from -1°C to -6°C, according to the cooling request from utilities.
The evaporation temperature of the refrigerant varies from -5°C to -9°C: this shows that the system has very high energy efficiency levels, even beyond classical direct expansion systems.
The secondary fluid is distributed by the Cold Water pumping station, where two redundant pumps determine the flow rate according to the actual opening of the motorised valves located on each cooling utility.
The machines are designed to be loaded with the new R1234ze refrigerant with GWP=1 without further changes.
Advanced regulations and the use of brushless pumps ensures that the power absorbed for the transport of the secondary fluid is very low, about 700 Watt.
In summer, the condensation heat of the chiller and of the heat pump is conveyed outside by a single liquid chiller.
This allows us to place the refrigerating unit and pumping station in the same room, even far away from the the building.
The thermal energy for heating purposes is obtained by fully recovering the condensation heat of the refrigerating unit.
Free heat, available throughout winter, can contribute for more than 75% of the total annual requirements even in northern Italy.
If the heating request is not enough to ensure the desired comfort levels, the the heat pump built into the chiller is activated and compensates for the difference.
These advantages would not be available in a transcritical CO2 system, as the temperature of the heat to be recovered would be too low and hardly usable to heat the shop.
Domestic hot water is obtained throughout the year exclusively from the overheating heat of the chiller hence it is completely free.
Thanks to this technology, efficiency in winter has a performance coefficient (COP) not lower than 2.7 with an outdoor temperature of -7°.
FRIGOVENETA supplies all electrical panels fitted with microcontroller boards running dedicated software to allow for temperature control in the shop according to the opening hours and the outdoor and indoor temperature and humidity in line with the food refrigerating unit to optimise electrical consumption.