Building Automation to Lower Costs and Save the Environment

Uploaded by Siemens on 07.04.2010

is possible to protect the climate and at the same time cut costs.
Siemens illustrates the dramatic impact of building automation and control on the energy
efficiency of buildings based on the new European standard EN15232.
It also employed the best-in-class products and systems from building technologies. We
show you how costs and CO2 emissions can be lowered, enabling us to protect the environment.
Buildings contribute 40 percent to the world's energy consumption. This needs to be changed.
By the year 2020 the European Union wants to save 20 percent of energy and form a standard
and a uniform product and system certification.
Intelligent building automation and control alone can accomplish dramatic savings of up
to 30 percent. Siemens has decades of experience and leading-edge technologies at its disposal
to achieve those targets. Now we would like to show you, how you can cut building costs.
Basis is the new manual 'Building automation-- impact on energy efficiency'. The manual shows
the fundamentals of energy-efficient building automation and control functions and explains
the benefits of eu.bac product certification.
The focus is set on the room with its users. It is influenced by a number of thermal effects
from people and equipment. In addition daylight and thermal effects from outside have an impact.
High energy efficiency calls for integrated room automation and demand-dependent control.
Room comfort is controlled in accordance with the requirements of the room users. And energy
production and distribution are adapted accordingly. This is the only way to save energy and to
reach conformance with energy efficiency class A.
What do we understand by energy efficiency classes? Energy efficiency classes value energy
consumption using a scale from A to D. According to the European standard EN15232 all relevant
energy functions of building automation and control are assigned to energy efficiency
classes. For a number of building categories the standard defines efficiency factors for
thermal and electrical energy in the four energy efficiency classes.
The efficiency factors are clear indicators of how much energy can be saved in certain
building categories. This is shown as a percentage versus building automation and control with
standard functions. For example: 30 percent thermal energy can be saved in an office building,
when comparing the building automation and control functions of class A with those of
class C.
Siemens is also involved in work associated with the European quality assurance system
of eu.bac. It pursues the objective of developing solutions for reducing the CO2 emissions of
buildings and a European quality assurance system for energy-efficient building automation
and control equipment.
The basis used for that purpose are eu.bac certified products and systems. In the case
of eu.bac certification of individual room controllers, the control performance of the
product is tested. To obtain a license document, the minimum accuracy required is 1.4 kelvin.
As we know, a reduction of one kelvin represents energy savings of about six percent.
The eu.bac tests produced excellent results for Siemens products. For Siemens individual
room controller RX used in connection with fan-coil units, the test report summary confirmed
an accuracy of 0.2 kelvin in heating mode and 0.1 kelvin in cooling mode.
This means that Siemens individual room controller RX is capable of savings up to eight percent
more energy than other eu.bac certified controller having a limit value of 1.4 kelvin.
By publishing the respective test report summaries, Siemens demonstrates this best-in-class contribution
in terms of energy savings.
The Siemens portfolio includes products and systems for room automation, energy distribution,
energy production, and energy services. Hence, Siemens ensures intelligent room comfort and
energy efficiency in the building.
Our portfolio consists of valves and actuators, operating units and sensors for all types
of media and physical variables, and automation stations, that can be matched
to the respective application.
These products and systems enable highly energy efficient solutions, allowing the supply of
energy to be matched to the requirements of all rooms.
With its building automation and control systems DESIGO and SYNCO and its home
automation systems SYNCO living, Siemens already meets the requirements of energy efficiency
class A as per EN15232.
Siemens offers also energy services as demonstrated by the following service package: about 80
percent of building costs are incurred during operation. Energy costs represent a major
part and provide significant potential for optimization. For that Siemens offers extensive
services aimed at maintaining and optimizing the energy efficiency of buildings, both short
and long term.
The savings potential made possible by the intelligent use of building automation and
control is demonstrated by a large number of reference projects.
For example, the general municipal hospital in Aalst in Belgium saved almost 36 percent
heating energy and nearly 16 percent electrical energy.
At the same time C02 emissions were reduced by 22 percent.
All this was accomplished just by improving the control system. The project's pay-back
time was only six months. Thanks to the improved control system at Erikslund school in Boras,
Sweden, heating energy consumption was cut by 32 percent and electrical power consumption
by 14 percent. In addition CO2 emissions were reduced by 824 tons. Here too, the pay-back
time of less than one year is rather short.
Since 1994, Siemens has completed more than one 1,900 energy projects worldwide. They
represent savings of 2 billion Euros within a period of 15 years and CO2 emissions were
reduced by about 2.4 million tons per year, the equivalent to 600,000 cars doing 20,000
kilometers per year.
As a member of several global initiatives Siemens also makes its a vast experience accessible
to other interested parties. As you have seen, it is possible to protect the climate and
at the same cut costs by making use of the best-in-class products systems and energy
services available from Siemens.
Costs and CO2 emissions are lowered, thereby protecting the environment.