Dr. Oliver von Quast is a partner of NION, angel investor and serial entrepreneur, with expertise and longterm experience in the utilities and cleantech sector. In Pt. 1, he has provided some ideas we’ve put together for sustainable energy management. The following technologies provide a rough overview of what can be conceivable.
There are many technologies available to save energy in the real estate area. A small collection of possible areas of application.
- Indoor natural light usage by light conduction, e.g. Solartube
- Wind driven building ventilation, e.g. GACS
- Heat provison based on user behaviour, e.g. Exploded View
- Invisible infrared heating applications, e.g. aelectra
- Intelligent building management systems, e.g. Faunder
- Smart architectural planning systems, e.g. Metabuild
- Intelligent building materials, e.g. phase changing materials (PCM) and energy transforming wall
paintings, e.g. SICC Coatings
- Hot water generation by solar thermal elements, eg. Viessmann, Consolar, Paradigma)
The location directly on the waterside of the river Spree could be used by utilizing river turbines to continuously generate electrical energy.
6kW running water turbine (bed of river Rheins close to St. Goar already came into operation in Dec. 2010)
There are many small companies who deal with river turbines (e.g. Smart Hydro Power, a Munich based Start-up). We assume that large producers (ABB, Siemens, etc.) regard this product class as niche market and thus do not offer market ready products.
Worldwide, there are several companies which o er horizontal wind turbines and micro wind turbines suitable for inner city locations with densely built-up structures. 20 kW wind turbine from Envergate AG Switzerland and 10 kW-Turbine from Tuge, Estonia
PV is the most simple, mature and wide spread technology to make use of renewable energy. Due to the fact that high-rise buildings are being avoided, there will be plenty of roof-area which we want to utilize to generate electricity. However, although making use of PV is not an eye-catcher anymore, there are still a lot of ways to imply innovative use cases. For example:
- using latest super efficient mono crystalline and/or self-guiding elements
- adding a sustainable usage concept, featuring storage systems to increase self-consumption on site
- making use of building integrated PV-systems
There are also many mature solutions which provide PV-Installations on facades. However: Since PV-facades have great influence on the optical impression of the building, the architect should be involved even at an early stage.
Building Integrated Photovoltaic is a new type of building material, which provides green energy as well as building preservation. Apart from generating electricity, modules can be customized in di erent dimension, thickness, shape and color (example from Solar Constructions).
In the northern part of Germany it can be expected that a PV system runs only 1.000 h/y at full load. Hence even if 3% of the entire space of 100,000 sqm can be utilized for PV generation, approx. 1,000 MWh of electrical energy could be produced annually. This is equivalent to the annual energy demand of approx. 85 households. However, this is only possible if electrical storage systems (i.e. batteries) are incorporated to cover the energy demand required at night or on cloudy days.