Dipl. Ing. Peter VESPERMANN
D - 12589 Berlin
Tel.: +49(0)30-654 898 60
Fax: +49(0)30-654 898 62
Wind power seen generating up to 18 % of global power by 2050
New IEA publication details the advances in technology that make increasingly possible a surge
from the current 2.6 percent.
A large proportion of electricity consumption in buildings is accounted for by artificial
This is directly reflected in the running costs of many buildings. In the housing sector, at
least 10 % of electricity is consumed by lighting.
Combining Building Technologies to Best Effect
The greatest energy efficiency is achieved by combining various energy-efficient technologies.
Of course, competent planning and selection of measures, and their careful execution, are
Smart electricity meters
Smart electricity meters play an important role in the e-energy solutions.
Energy consumption in buildings currently accounts for over
40 percent of all energy consumed in
This is by far the greatest share of total energy consumption, ahead of transport and industrial
production. Approximately 85 percent of the energy consumed in buildings is attributed to heating
and hot water generation, which means that the potential for energy savings is huge:
The key application areas for renewable energies in buildings are as follows:
Condensing Boiler Technology
Innovative condensing boiler technology has, in terms of energy savings, a payback period
of just a few years. The German heating industry is at the forefront of efficient high-tech
Wind power could generate up to 18 percent of world’s electricity by 2050,
compared with 2.6 percent today, the new report Technology Roadmap: Wind Energy – 2013 Edition finds. The
nearly 300 gigawatts of current wind power worldwide must increase eight- to ten-fold to achieve the
roadmap’s vision, with the more than USD 78 billion in investment in 2012 progressively reaching USD
150 billion per year.
- In the office and commercial sector,
lighting can even account for up to 50 percent.
The bulk of this consumption is still based on economically and environmentally inefficient technologies
like the traditional light bulb.
The potential amount of energy to be saved in terms of lighting is immense. Various measures can
significantly reduce the energy consumption both when planning and when modernising a building:
-> optimised use of daylight when planning a building
(shade, electronic light intensity control, etc.)
-> use of highly efficient illumination
-> modernisation using energy-efficient lighting systems
-> use of intelligent lighting control
- Various technologies can be combined
successfully through competent planning and selection of measures, and their careful execution.
Knowledge gained from and technologies used in the construction of energy-efficient buildings (for example,
passive new builds) can also be applied to the renovation of building stock, including the optimisation of
heating technology to ensure low wastage, the avoidance of thermal bridges and ventilation measures:
Ventilation systems required (in passive houses in particular) render many old and particularly inefficient
practices superfluous, for example, tilting windows to ventilate a room. German companies can achieve
savings of more than 80 percent in a typical old build.
- Smart electricity meters play an important
role in the e-energy solutions.
In combination with new digital gateway technologies, these will replace mechanical meters, including in private
households, and will assume important control functions as energy centres for the distributed generators and
- This is by far the greatest share of
total energy consumption, ahead of transport and industrial production.
Approximately 85 percent of the energy consumed in buildings is attributed to heating and hot water
generation, which means that the potential for energy savings is huge: With new technologies the
energy efficiency of European building stock can be increased by 50 percent.
Improvements can be made not only to heating systems and other technologies, but also in the area of
insulation. Higher targets for energy savings and reduced CO2 emissions can be achieved by combining
perfectly co-ordinated components to create efficient, fully integrated systems.
- The key application areas for renewable
energies in buildings are as follows:
-> solar thermal technology for domestic hot water and / or to support heating systems
-> photovoltaic technology to generate electricity for domestic use or for grid supply
-> innovative wood-burning solutions, for example, using split logs, wood pellets or
-> solutions that leverage environmental heat or near-surface geothermal heat, for
example, using heat pumps for heating
- The German heating industry is at the
forefront of efficient high-tech boiler development.
In Europe, the main technologies used for room heating and the heating of drinking water are hydraulic
heating systems with oil and gas central-heating boilers. Since the largest portion of energy is consumed
by the generation of heat in buildings, the renovation of heating systems is one of the areas offering the
greatest potential for savings.
The latest-generation boilers are called condensing boilers. These represent an enhancement of the
low-temperature boiler and reduce heat loss considerably. As a result, the amount of heat now released from
the fuel is almost at the limit of what is physically possible. Condensing technology also utilises the
condensation heat contained in the flue gas, which would otherwise remain unused. An additional increase
in efficiency is achieved through lower flue gas temperatures, which mean that less flue gas is lost. As
a result, condensing boilers can achieve efficiency values in excess of