Introduction of new decentralised renewable heat supply in an existing district heating system

摘要

The effects of new heat pump and solar collector capacity in an existing district heating system are investigated by using Helsinki as a case study. Existing heat supply consists of combined heat and power plants, boilers and large-scale heat pumps. Also, the potential benefit of low distribution temperatures is evaluated. Both an outdoor temperature dependent supply temperature between 80 and 110 degrees C and a constant supply temperature of 65 degrees C are considered for distribution.