Utilising energy in the industry and trade
Industry needs large amounts of process heat and mechanical energy. At 1 percent, only a small part of the energy used is directly converted into warm water. In spite of this, large amounts of warm wastewater are produced, which occur when production processes are cooled.
The energy distribution in the trade and service sectors is distributed differently. Here, the share of warm water is significantly higher at 8.9 percent; in contrast, less process heat is needed than in the industry. At 38.9 percent, heating space plays the most important role, similar to that in the private sector. This form of energy use makes up only 8.2 percent of the energy expended in the industry.
The advantage of warm wastewater produced in the industry and trade is that it occurs in large amounts and continuously. For the wastewater from private households, one reaches these amounts first with a specific number of living quarters. This has to be correspondingly factored in when a plant is designed to recover energy from wastewater.