If you’re sweltering in Delhi or shivering in Detroit and want affordable, environmentally friendly cooling or heating, district energy may be your best bet.
A district energy system is a network of pipes that heat and cool buildings across a neighbourhood or entire city. Modern district energy systems connect renewables, waste heat, thermal storage, power grids, thermal grids and heat pumps—delivering up to 50 per cent less primary energy consumption for heating and cooling. Visionary cities and countries have been able to decarbonize heating and cooling and achieve high efficiency, renewable energy, and CO2 targets with modern district energy.
To replicate and scale up best practices worldwide, UN Environment launched the District Energy in Cities Initiative.
Banja Luka in Bosnia and Herzegovina is getting a new district energy system. Photo by City of Banja Luka.
Consider just one of the District Energy in Cities Initiative’s 36 cities, Banja Luka in Bosnia and Herzegovina. With the help of the Initiative and the European Bank for Reconstruction and Development, the city updated its 35-year-old network. These refits increased the share of renewables by 75 per cent, cut harmful air pollutants by 94 per cent and saved US$1 million a year in fuel costs.