"GlashusEtt" - Environmental friendly technology
"GlashusEtt" is a clever thinking building that all the time tries to reduce and adjust the energy usage. Everything is controlled and regulated via a control system so that for example electricity can be produced in an environmental friendly way and that the on-site produced electricity can be connected for usage in the building or to be fed to the grid. The control system is based on ABB:s platform Industrial IT.
ON THE ROOF there are plants growing that function as a compensation basin at heavy rain. Here is a solar cell set-up with inverters, a cabinet for the control system for the hybrid energy system, a weather station and a hydrogen storage for the fuel cell system.
ON THE UPPER LEVEL is the greater part of the technical installations located, the fuel cell system with peripheral equipment, electrolyzer, biogas boiler, accumulator tank for hot water and the control system for the ventilation. Here is also a small conference room with a biogas stove and pantry.
THE MIDDLE LEVEL is built as a conference location where groups of interested people can be invited to be informed about the project participants and their environmental work.
On THE GROUND LEVEL, which is open for the public, visitors can see how the unique Hammarby model works, on computer screens and on displays.
IN THE BASEMENT LEVEL there is a pump station for the waste water, a garbage handling construction and a electricity supply system.
Homemade electricity in a Clever Building
Extensive research about increased efficiency, better use of resources and reduced environmental influence is behind the idea concerning homemade electricity. Fast technology development and decreasing costs for components make it possible to utilize seasonal variations and control systems in so called “Clever Buildings” and by that even sell the surplus of one´s own-produced electricity to the grid.
The concept is clever. The hybrid energy system produces electricity, which is used to cover “GlashusEtt´s” base demand. When the production from the solar cells and the fuel cell exceeds the demand from the building, the green surplus electricity is sold to the grid. If it is more profitable the electricity is stored within the system as hydrogen, which is produced via the electrolyzer. The stored hydrogen can then be fed to the fuel cell system when the demand of electricity increases.
Solar- and fuel cells as technologies and hydrogen and biogas as energy-gases are areas on strong advance. Commercial systems can in the near future become reality. Solar cells with adjacent systems are already available on the market while fuel cell systems for domestic use (in the size 3-5 kW) are expected to get their breakthrough within the nearest years. In the longer perspective there is of course a large potential with respect to the approaching changes in the energy system.