Renewable energies

Renewable energy

Heating networks/grids, energy systems, CE-conformity

for energy recovery plants 

Heating networks, grids 

If the individual heat exchangers are located at a distance from the source of heat or the sewer, the heat will be conveyed using heat pump to the heating plant via uninsulated pipes. With this form of «cold long-distance heating» it is possible to bridge distances of over 1 km cost-effectively with large objects.

Wastewater heat recovery can provide heating to several buildings together with a local heat network of a central heat station. In this case, the heat is transported from the heating station in insulated pipes at higher levels of temperature to individual users (warm heating network).

See images below 

Energiesysteme, Installationen für Heizen und Kühlen

Different types of installations can be used for energy recovery plants. 


  • Monovalent plant, which also covers peak load 
  • Bivalent plant with peak load heating system 
  • Multivalent plant with, for instance, a co-generation plant  

See images below 

Pressure equipment guideline, operating regulations and CE conformity

Directive 2014/68/EU, regulating pressure equipment (Pressure Equipment Directive”, PED) must be followed in pursuance of the basic safety requirements with respect to a heat exchanger. In order to fulfil the basic safety requirements, manufacturers can use standards, such as EN 13445/EN13480 or AD 2000-regulations.

CE-conformity marking is a requirement for initially putting such products into operation (or commissioning) that are subject to the legal requirement of the CE conformity marking as per EU guidelines. The CE conformity marking is an administrative marking that permits the freedom of movement of the products corresponding to labelled industrial products on the European market.