Towards a fossil-fuel free urban district
There are many challenges to achieving a fossil fuel-free urban district. Transport is regional and governed by national instruments. The residual waste used to fuel Stockholms district heating system still contains fossil matter.
A roadmap has been produced according to the Climate Positive Development Programmes (CPDP) framework and shows that Stockholm Royal Seaport could reduce greenhouse gas emissions by about 60% compared with Hammarby Sjstad, Stockholm. The calculation refers to reductions of greenhouse gas emissions in the areas of energy, transport and waste. Monitoring will start in 2018.
Optimised mass balance
Former industrial activity has caused a great deal of soil contamination in Stockholm Royal Seaport. When buildings and streets are built, rock needs to be blasted, and soil and deposited material is excavated. Local soil remediation and on-site re-use of excavated material reduces the need for transport. Material that does not meet quality requirements is transported to a treatment facility or to landfill, see page 62 in the Monitoring Report.
The buildings in Stockholm Royal Seaport are close-to-zeroenergy buildings, which means they are well-insulated and airtight, and have energy-efficient installations. Energy consumption is also determined by the shape of the building. The local production of energy, such as photovoltaics on the roof, reduces climate impact and saves resources.
Average energy consumption per development phase
The energy performance has gradually improved between the development phases, see pages 40-43. In Norra 1 and Vstra, are 37% and 43%, respectively, lower than the Swedish Board of Housing, Building and Plannings (BBR) requirements. In Norra 1, the average measured values are 69 kWh/m2 Atemp. In Hammarby Sjstad, the mean value (according to the energy declarations) is about 107 kWh/m2 Atemp. As of Norra 2, the development phases are 40% lower than the BBR requirements that were currently applicable. For more information about the energy consumtion see pages 4043 in the Monitoring Report.
LED for lighting
As of 2017, only LED lighting has been used in public spaces, resulting in energy savings of 50%. See page 62 in the Monitoring Report.
Life-cycle assessment (LCA)
All construction also has an indirect climate impact due to the materials used. The City of Stockholm is involved in a project to test an LCA tool developed by the IVL Swedish Environmental Research Institute, funded by the Swedish Energy Agency. See page 66 in the Monitoring Report.
Indoor environment quality
The indoor temperature and relative humidity are important for the health and well-being of occupants. Quality assurance during the construction period and demand-controlled ventilation in the building are essential for achieving good air quality. Daylight and low noise levels also contribute to high standards of comfort. See page 55 in the Monitoring Report.
Built-in materials can contain both hazardous and harmful substances. The large volumes of material and long lifespan of the buildings increase the risk that building materials can impact human health and the environment. With the precautionary principle as a starting point, all buildings and facilities shall be free of hazardous substances as far as possible. All built-in materials shall meet environmental performance standards and be documented in a logbook. See pages 54 and 65 in the Monitoring Report.
Ancient microbes remediate caverns
Caverns in Hjorthagsberget that were previously used for storing naphtha will become a garage for 1,200 cars. The caverns have been water-filled and require remediation, since naphtha is crude petroleum and flammable in contact with air. The water is purified with archaea, ancient microbes that can break down oil and petroleum. The remaining substances water, CO2 and compost are harmless. This purification method could also be used in future remediation projects, such as caverns on Loudden.
Socially sustainable materials
It is important that the materials used are produced in a socially sustainable manner. In 2017, efforts to further develop ethical standards for natural stone and tropical wood continued.
Stockholm Royal Seaport has been involved in a work group to create a code of ethics for natural stone since 2015. The aim is to influence and contribute to a better workplace and working conditions, and share knowledge and best practice with other municipalities. See page 66 in the Monitoring Report.