Reference

Hilti Kunststofftechnik Nersingen

Heat generator

Heat/cold consumers

Cold generator

Planning

Execution

Perfect hydraulics

The Zortström technology used in the Hilti plant combines different temperature levels in the heating and cooling area extremely efficiently. The hydraulics work perfectly. In addition, the power consumption of speed-controlled high-efficiency pumps is greatly reduced by hydraulic decoupling.

Enormous gas and electricity savings

The waste heat from the plastic mold production flows into the assigned temperature level and covers almost the entire energy requirement of the heating system. This saves an enormous amount of gas and electricity. In summer, the heat generators are switched to cooling the factory and the machines. Depending on the outside temperature, a large proportion of the energy is blown through the recooling plant. In addition, cooling is primarily supplied by the well cooling system. If this is not sufficient, the chiller can be switched on for cooling.

Benefit

Efficient

The immediate use of waste heat for heating leads to enormous primary energy savings, as the gas boiler and heat pump only need to be activated on particularly cold days when the building's heating requirements are very high.
Demand-based output control of the heat pumps and chillers depending on the temperatures in the Zortström.
Complete switchover of the local flow to cooling (summer operation) is easily possible.
Cost-free cooling, i.e. free cooling with recooling unit, well cooling and the chillers are only activated under heavy load, resulting in massive savings in operating costs.
High-efficiency pumps run with minimal power consumption and don't rock each other.

Simple

Safe