5.5. Solar District Heating
Solar district heating is the provision of central heating and hot water from solar energy by a system in which the water is heated centrally by arrays of solar thermal collectors and distributed through district heating pipe networks (or in block or local heating systems by smaller installations). District heating is best suited to areas with a high building and population density in relatively cold climates.
For block systems, the solar collectors are typically mounted on the building roof tops. For district heating systems, the collectors may instead be installed on the ground.
Solar district heating systems can feed heat into substations in connected buildings or are directly connected to the district heating primary ...