Page 292 - Sustainable Cities and Communities Design Handbook

266 Sustainable Cities and Communities Design Handbook

FIGURE 14.4 One section of the solar collecting district heating plant on Ærø (Denmark.dk).

FIGURE 14.5 Water storage for the MARSTAL DH plant (Sunstore 4, 2013).

project to become a renewable energy island with all its electricity needs
coming from sustainable sources. Between 1990 and 2000, 10 onshore wind
turbines with a total capacity of 11 MW were erected, and starting in 2002,
construction of 10 offshore wind turbines at 2.3 MW each was begun (these
turbines were meant to compensate for the continued usage of fossil fuele
burning cars on the island and oil-based heat production and the CO 2 emis-
sions from such). Furthermore, 60% of the island’s heat demand was to be
supplied via district heating and 40% via individual boilers. Those using
individual boilers were encouraged and supplied information regarding
biomass boilers, solar collectors, and heat pumps, with the help of local
tradesmen, resulting in half of those not connected to the district heating
network converting. About 70% of the heat supply on the island comes from
sustainable sources. Community meetings, held once a month, were
commonplace during the planning process, where information about the en-
ergy transition was shared and discussed, such as financial costs of the project
and turbine visualizations (Energy Academy, 2011)(Fig. 14.6).