Refrigeration

In short

Our refrigeration range covers plug-and-play climate units, the Quadro Compact Cooler in 40, 60, 120 and 160 kW, and GCU direct and GCU-I indirect cooling systems from 20 kW, including propane-CO₂ options. The Vision Control climate computer runs the installation, which should be checked every year.

Climate Units

Climate units ensure an optimal climate in every phase of storage

Ventilating, cooling and drying while maintaining product quality.

The climate units are ready to plug in and can be used modularly in the storage area. This allows savings on installation and construction costs. These units can be used for room ventilation (cooling) and forced ventilation in combination with a suction wall for products in boxes. By combining the different units, the air volume and the cooling and drying capacity can be adapted to the storage location and the product. The units are sustainable due to the use of energy-efficient fans and natural refrigerant. The refrigeration design ensures minimal weight loss during the storage period and this increases storage efficiency.

The plug & play version with condensation drying function is unique: one unit that ensures that the product is dried as quickly as possible in all situations to prevent mould and bacterial growth. Drying and heating with outside air whenever possible and internal condensation drying regardless of the weather when the outside conditions are not suitable. There are 3 different climate units available:

Air 50 – ventilation

Cool 50 – ventilation and cooling

Dry 50 – ventilation, cooling, heating and condensation drying.

Green Tolsma-Grisnich cooling units installed along the outside wall of a crop store

Quadro Compact Cooler

The Quadro Compact Cooler (QCC) has a high coefficient of performance (COP)

The QCC is designed to be durable and is available with four cooling capacities: 40, 60, 120 and 160 kW.

The large evaporation surface creates the optimum conditions for the product in question and, thus, a high storage efficiency.

The QCC can, optionally, be equipped with an internal hatch, so air from the outside can be used for ventilation. The horizontal set-up of the condenser ensures an optimum supply of air during external ventilation.

Vario

The QCC-40 and QCC-60 models can also be supplied in a Vario version, with the advantage that the machine can automatically realise a higher capacity than the standard specification. Consequently, big batches can be cooled more quickly. If a storage site is filled with only a small quantity of product, the Quadro Compact Cooler combined with a Vision Control climate computer – will adjust to ensure cooling in an energy-efficient manner.

New generation mobile refrigeration unit:

  • Refrigeration system in one insulated unit
  • Equipped with EC fans
  • High air output
  • Low noise level
  • Durable and energy saving.

Refrigeration Systems

Achieving optimal storage efficiency was the goal in developing this direct cooling system, so minimal drying-in and energy saving are crucial

The GCU (Green Cool Unit) is one of Tolsma’s own innovations.

The advantages:

  • Advanced refrigeration systems
  • Energy-efficient
  • Maximum efficiency.

The application of advanced compressor technology in combination with an intelligent control system (developed in-house) has made it possible to achieve the highest possible efficiency for the total storage system. The GCU is available with a variety of cooling capacities ranging from 20 to 185 kW. Various other options geared to the special requirements of the product include electronic defrosting of expansion valves.

The GCU can be supplied in a weather-proof casing or built into an engine room or container.

The GCU-I (Green Cool Unit-Indirect) is an indirect cooling system that we ourselves have developed. The GCU-I (chiller) was developed using the same criteria as those applied to the GCU units. This version is ideally suited to the storage of several types of product in different storage climates. The GCU-I provides the facility to cool separate cells at different temperature levels. The minimal temperature difference across the evaporator means that the storage efficiency of this cooling system is optimal, and the quantity of synthetic refrigerant required is minimal, so that less (statutory) maintenance is required. The GCU-I is available from 20 to 200 kW.

As a result of changes to EU legislation which further limit the use of synthetic refrigerants, new cooling systems using coolants such as propane-CO2 have become an attractive alternative. In addition to the effective cooling properties of CO2, the added benefits of this refrigerant are its safety and environmentally friendly characteristics. The temperature of the air cooler can also be controlled in these systems, so they can be accurately geared to the stored product. This keeps drying-out to a minimum (in other words – more and better products come out of storage) and energy consumption is also reduced. It is likely that CO2 propane storage installations will become standard in future, thanks to their environment-friendly properties.

The cooling installation is controlled by the Vision Control climate computer. This intelligent and user-friendly system ensures the optimal functioning and efficiency of the cooling installation.

This diagram provides a visual representation of pressures, temperatures, running hours and valve positions.

Special requirements as regards management, control, maintenance and supervision apply by law to cooling installations. It is crucial that the installation is checked and (if necessary) serviced annually. Yearly monitoring includes, amongst other things, extensive checking for any leakage of refrigerant. In addition, the specialist maintenance team from Tolsma will check the compressor, condenser, air cooler (evaporator) etc.

Questions about refrigeration

What is the difference between the GCU and the GCU-I?

The GCU is a direct cooling system from 20 to 185 kW. The GCU-I is an indirect system (a chiller) from 20 to 200 kW that can cool separate cells at different temperatures and needs less synthetic refrigerant.

Yes. The Dry 50 climate unit ventilates, cools, heats and dries by condensation, and an add-on module brings condensation drying to indirect cooling systems.

Every year, and serviced if necessary, including an extensive check for refrigerant leaks. Find an approved refrigeration engineer on Service and Support.

The Vision Control climate computer, which shows pressures, temperatures, running hours and valve positions.

Next step: match cooling to your store

See the ambient ventilation units that work alongside refrigeration and our packaged refrigeration unit, then ask us to size your store.

CONTACT FARMELEC