Bernrain energy concept
Heat recovery saves energy and water: In 1980 a special system for the recovery of waste heat from specific production processes was developed at Chocolat Bernrain in Kreuzlingen. The system transports 800,000 litres of water through a closed loop and covers most of the company's cooling and heating requirements. Constructed at considerable cost, the system has also achieved savings of over 98 per cent in the consumption of mains supply water. Moreover, the company’s CO2 emissions were able to be reduced precipitously.
Stella energy concept
When the premises of Chocolat Stella were extended, a modern and efficient energy concept was implemented. To ensure that energy requirements would be able to be met, a heat pump makes use of ground water; it can be operated as a cooling unit in the summer, but also as a base-load heating system in the winter. In summer, this system operates primarily as a cooling unit for cold water production. Approximately 70 percent of the required cooling capacity can be covered by ground-water direct cooling. Waste heat is, where possible, used for heating purposes or returned to the ground water again. During winter and the transitional periods, heat can be drawn from ground water or the cooling water cycle and used for base-load heating. The new system enables Chocolat Stella to reduce significantly its dependency on fossil fuels and emissions of CO2.