Central district heating systems have gained attention in recent years because they can be more efficient than localized boiler units. The efficiency of district heating is usually due to power generation plants being able to produce heat and electricity simultaneously. District heating also helps prevent pollution by using advanced flue gas cleaning techniques.
Central district heating systems distribute heated water from power plants to densely populated residential and industrial areas through insulated piping networks. Large storage tanks are typically used to safely store heat for use during peak demand times. High water quality is required to prevent internal corrosion and to increase the lifetime of piping and storage tanks.