When technology meets sustainability: cold local heating for Lower Saxony

A new development area in Lower Saxony was recently developed with cold local heating.

500 lines with a total of 5000 collectors from GeoCollect supply a large development area. Hawle supplied the appropriate gate valves for this, because the valves required were durable and corrosion-resistant.

Cold local heating networks are sustainable systems for generating energy from geothermal energy. They are emission-free and supply buildings with heat in winter and cool them in summer. Heat pumps must be installed in the buildings for this purpose.

Heat pumps extract energy from the medium, which leads to a reduction in temperature. An environmentally friendly antifreeze is usually added to the heat transfer medium, water, to prevent the pipework from freezing under all conditions.

In this project, 22 Hawle PE weld-in gate valves d 180 mm and 8 PE weld-in gate valves d 90 mm were installed. These type "E3" drinking water valves are suitable for commercially available heat transfer fluids with antifreeze additives and, as a rule, corrosion inhibitors, as used in cold local heating systems.

Hawle "E3" gate valves are characterised by smooth operation, high corrosion protection and a long service life, which is why they are ideal for these climate-neutral cold local heating projects.