Systems

Customer-specific refrigeration systems

Energy efficiency, capital investment, running costs, room size, noise protection, redundancy, local climate – every project has its own specific requirements when it comes to precise air conditioning. Our customers can choose from a variety of configurations to produce the best balance between investment, running costs and energy efficiency. STULZ is the only manufacturer in the world to offer such a wide range of configuration options.

The AS system
Compressor cooling with compressor refrigeration system based on the direct evaporator principle (DX/direct expansion)

The A/C unit's refrigerant circuit consists of an evaporator, an electronic expansion valve, an EC compressor and an external air-cooled condenser. Conveyed by fans, the room air flows through the evaporator where heat is extracted from it and transferred to the refrigerant. The A/C unit and external condenser are connected to one another by means of a closed refrigerant circuit.

The GS system
Simple heat dissipation via a water-glycol mixture

Like the AS system, but in the GS system, the heat from the DX circuit is transferred to a water-glycol mixture by a plate-type condenser integrated in the A/C unit. The mixture circulates in a closed circuit and transfers the heat to the outside air via an external recooling heat exchanger.

The GES system with Indirect Free Cooling

The GES system is a hybrid system combining a GS system with Indirect Free Cooling. As soon as the outside temperature permits, the GES system switches from Compressor mode to Energy-Saving mode. The outside air is then utilized for Indirect Free Cooling.

In temperate climate zones north and south of the equatorial zone, the STULZ CyberRow can exploit its energy-saving advantages to the full. Electricity consumption for rack air conditioning falls by up to 60 %. Using CyberRow GES cuts operating costs and is environmentally friendly.

The CW system
Liquid-cooled system

The CW unit manages without a refrigerant circuit of its own, but requires separate chilled water generation. The room air conveyed by the fans flows through the direct cooling unit, which transfers the heat to the chilled water. The heat is extracted from the water by a chiller. The air conditioner and the chiller are connected to one another by means of a closed cooling water circuit.

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