1IWT
Institute of Thermal EngineeringInstitut für Wärmetechnik (IWT)
Graz University of Technology
Research Area „Energy-Efficient Buildings“
Inffeldgasse 25/B
A 8010 Graz
Austria
www.iwt.tugraz.at
2IWT
• Combustion and gasification
of biomass
• Fuel cell research
• Modelling and simulation of
high temperature processes
Research Areas
SOFC
• Development of energy-
related components
• Thermal simulation of
buildings and energy
systems
• Urban decentralized and
central energy supply
concepts
• Heat pumping systems
• Compression & absorption
systems
• Stationary & mobile applications
• Alternative refrigerants &
processes
Thermal Energy SystemsHeating, Refrigeration
& Air-Conditioning
Energy-Efficient
Buildings
3IWT
Energy-related components – Energy Storage
Contact: [email protected], [email protected]
Main research areas in the field of energy storage
• Increase of the storage density (e.g. PCM)
• Reduction of heat losses
• Improvement charging & discharging unit
• Development of simulation models
• Storage concepts for new applications
(e.g. rail vehicles, seasonal storage)
0
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time [min]
tem
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ture
[°C
]
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[kW
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T_out_sim
T_PCM1_sim
T_PCM3_sim
T_PCM5_sim
T_PCM7_sim
T_out_exp
T_PCM1_exp
T_PCM3_exp
T_PCM5_exp
T_PCM7_exp
T_in
P_sim
P_exp
Optimisation of charging and
discharging unit - water storage tank
Measurement:
Transparent
storage tank
Comparison between simulation and
measurement for discharging the tank
(PCM Sodium Acetate Trihydrate)
4IWT
Energy-related components – Heat Pumps
Contact: [email protected]
Development and modelling of highly efficient heat pump circuits
• Construction and measurement of
heat pump prototypes
• Hardware in the Loop - Operation
• Development of detailed heat pump models
with experimental validation
CAD-illustration system Source: HSR-SPF
Validation of the simulation model incl. economiser and desuperheater
Condenser Desuperheater Coeff. of performance (COP)
5IWT
Project example – ABS-Network
Contact: [email protected], [email protected]
Sandwich panels for forming the thermal building envelope –
with solar thermal activation
• Developing a solar thermally activated
facade panel in order to reduce
the energy demand of a building.
• Solar absorber with
roll-bonding technology
• Combined CFD and FEM are
used together in one
simulation environment.
Method: Conception, simulation,
test setup, measurement,
validation, revision of the concept
Illustration absorber temperature for four different absorbers
6IWT
Project example – NEWSUN
Contact: [email protected]
A new CPVT Collector for Desalination
• Development of an energy autarkic system for desalination with
a Multi-Effect Distillation (MED)
• Thermo-electrical simulation of the system for dimensioning the
components (collector, storage, battery) and FEM/CFD
analyses for optimal cooling of the CPV
energy autarkic system for desalination parabolic trough concentrating collectors
CPVT-Collector
Sea Water
DrinkingWater
Electricity
Solar Energy
Electricity
Heat
Salt Water
7IWT
Project example – solSPONGEhigh
Contact: [email protected], [email protected]
High solar fraction due to thermally activated concrete cores
• Detailed analysis of the behaviour of thermally activated construction elements
• Increasing the solar fraction by using the building's immanent storage mass
• Optimization of the control strategy for loading the concrete core
• Techno-economic analysis of system variants
Method: measurement of realized concepts, programming (control), validation, thermal
buildings and system simulation
water inlet
water outlet
System concept Hydraulic system layout - solar thermal concept Installation variant - TABS
8IWT
Project example – COOLSKIN
Contact: [email protected]; [email protected]
Autarkic Cooling via the Building Envelope
The solar irradiation onto the façade is converted to electrical energy, which is
directly or time-delayed used to cool the adjacent room. Energy supply is
energetically autonomous and is not dependent on energy from external sources.
Method: Development, Simulation, Realization, Measurement, Validation, further
development of the concept
Test building with autonomous cooling PV system
9IWT
Project example – HotIceWeiz
Contact: [email protected]
Heating and cooling concept with Ice Storage
Latent heat utilization with ice storage, heat pump, solar thermal
and PV system for heat, electricity and cooling supply to an
apartment building
Method: system-evaluation, -measuring, -simulation, -validation
and system-optimization
-15
-10
-5
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01.01.2016 22.02.2016 14.04.2016 05.06.2016 27.07.2016 18.09.2016 09.11.2016 31.12.2016
Ice
Sto
rage
Tem
per
atu
re in
°C
T_a T_ice_meas T_ice_sim T_ice_Coll_5
T_ice_Coll_10 T_ice_Coll_15 T_ice_Coll_20 T_ice_Coll_25
2 x 10 m³
30 m² 800 ltr. 1450 ltr.
Floor Heating
35/27°C
Ice-Storage
HeatPump
8 / 10 kW
B0W35
TemperatureIce-Storage
10IWT
Contact: [email protected]; [email protected]; [email protected]
Research Studio Austria - EnergySimCity
For the development of a simulation platform for the modelling
of complex urban energy systems with the features …
multisectoral (heat, electricity, gas)
interactiv (conversion, transport, storage, consumption)
universal (Macro-, Meso,- und Micro-level)
transient (high temporal resolution)
transient, multisectoral simulation - illustration spec. heat and cold load
air flow simulation quarter
h: 2 m
h: 15 m
h: 30 m
Project example – EnergySimCity
11IWT
Project example – Smart City Project Graz Mitte
Near the main railway station the urban district „Smart City Graz“ is being developed
Contact: [email protected]
Smart City Graz
Waagner Biro
Graz - Reininghaus
“Graz is developing into a smart city”
• Graz strives to increase the quality of life and reduce CO2 emissions.
• By 2050, only one fifth of resource consumption is to be consumed.
• Energy- and resource-optimized urban development in the fields of energy, ecology,
infrastructure, mobility, urban planning, society, buildings and business.
• First pilot projects are implemented in defined target areas (e.g. Waagner-Biro), from
which an overall urban strategy is derived, taking into account the regional context.
12IWT
Project example – EnergyCityConcepts
Contact: [email protected], [email protected]
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Salzburg Schallmoos - Szenario 2050 BAU
Integrated analysis & simulation of energy systems in cities and urban districts
• The aim is to develop a sustainable energy supply concept for the Salzburg
district of Schallmoos and to anchor concrete implementation strategies in the
urban development visions.
• The energy supply and energy infrastructure for the Salzburg-Schallmoos district will
be mapped in the designed toolbox, validated and future development scenarios
simulated.
heating energy and electricity demandsimulated in detailed temporal resolution
