Summary
In China, the reduction of CO2-emissions has also gained great political significance. More than 80 cities, each with a population of at least 5 million inhabitants, could sustainably reduce their total energy consumption at different levels. However, this potential is hardly ever realized.
Using the Fengxian region as an example, the project therefore examines how the city structure of the megacity Shanghai needs to be developed, as to combine the enormously increasing energy requirements with energy efficiency strategies.
The objective of the project is thus to reduce the energy demand curve without curtailing the comfort requirements of the population. For this purpose, factors important for energy consumption in a city, such as city structure, mobility, building architecture and technology, as well as energy production, are examined more closely.
Results:
- Renewable energies such as biomass, solar energy, ambient heat, and wind energy are considered to be useful for the region.
- Buildings with lower building depths can use passive solar energy by orientating all habitable rooms towards the sun.
- Although the city structure greatly impacts mobility, energy savings of up to 17% are possible compared to the existing planning. This is based on the fact that around half the distance covered by cars in densely populated areas corresponds to the action radius of a bicycle rider ( 5km).
- At micro-levels (regions of the city, city quarters) further energy savings of up to 14% compared to the current planning can be realised through different means of city planning.
- With respect to the energy efficiency of buildings, a savings potential of up to 64% can be affirmed, if the corresponding standards are applied to new buildings and stepwise also applied to existing buildings.
- At regular intervals, the planned energy monitor determines the actual energy consumption of the city or the district.
