Optimised Performance of Energy Supply
Systems with Exergy Principles
- LowEx Communities
Fraunhofer Institute for Building Physics (IBP)
Department Energy Systems
Anna Kallert
Tekn. Dr. Dietrich Schmidt
Auf Wissen bauen
© Fraunhofer IBP
Innovative city and urban concepts
How will the development of city systems looks like in future?
Intelligent
electrity grids
Climate oriented city
development
Renewable
energymix
Plus-energy-buildings/
communities
Smart Mobility &
E-mobility
Smart Infrastructures
& supply systems
Communities as energy systems
Sustainable community
energy systems
Building
systems
Supply systems
The LowEx approach for communities
Application of LowEx approach for optimization of community demand adapted
supply. The very efficient so called low exergy supply and use are of particular
interest (see green boxes).
Scope
Improvement of energy conversion
chains on a community level
• Significant reduction of energy
demand and GHG-emissions
• Integration of renewable heat and
cold sources
Objectives
• The focus is on technologies and innovative concepts using low
valued energy sources (LowEx) and renewable energies for the
heating and cooling of neighborhoods and cities.
• The objective is to demonstrate the potential of low exergy
thinking on a community level as energy and cost efficient solution
in achieving 100% renewable and GHG emission-free energy
systems.
This includes:
• Storage concepts
• Networks / grids
• Control systems und strategies
• Business concepts
System integration!
Waste heat utilization and cascading via synergies
...only possible with smart management systems
Supermarket
Residential
Living
Ice rink
Swimming
pool
Source: REAP Project, TU Delft
Community case study in Heerlen (NL)
- LowEx approach for the Mine Water Project
demand
distribution
LT DH&C 3-pipes system
supply
Minewater
Additional
RES
biomass,
solar
Integral system
approach for the total
built environment
Buildings
suitable for
use of low
valued
energy (LTH
and HTC)
Level of aggregation
Level of detail
Assessment methodology
Expected outcome
• Design guidelines for optimised low exergy systems on community
scale
• Technology solutions and new development approaches for smart
distribution solutions
• Case study evaluation and best-practice catalogue
• Exergy evaluation on community scale
Our target groups:
• Energy supply and technology industry,
• Project developer and housing companies,
• Decision makers within communities,
• Academia, research and education
1st Working Phase Meeting at NEA
August 26th, 2014
Reykjavik, Iceland
17 participants from
7 EBC countries
(AT, CH, DE, DK, NL, SE, USA)
Tekn. Dr. Dietrich Schmidt
Head of Department Energy Systems
Fraunhofer Institute for Building Physics
Tel: +49 (0)561 804-1871
dietrich.schmidt@ibp.fraunhofer.de
www.ibp.fraunhofer.de
www.iea-ebc.org/
www.annex64.org
…research and solutions for a sustainable world