Project Image Pool
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Terms of use: The pictures on this site originate from the projects in the frame of the programmes City of Tomorrow, Building of Tomorrow and the IEA Research Cooperation. They may be used credited for non-commercial purposes under the Creative Commons License Attribution-NonCommercial (CC BY-NC).
Overview transformation plan
Overview transformation plan
Copyright: AEE INTEC / Ingo Leusbrock
Digital Twins can serve as virtual components in lab setups.
Mapping of a proof-of-concept test case to the DigitalEnergyTestbed setup using the Digital Twin of the DH substation test stand.
Copyright: @ AIT Austrian Institute of Technology GmbH
System-level Control of a Heating Grid with Sector Coupling
Exemplary Configuration of a simple heating grid, considering sector coupling through CHP and heat pump by forward-looking system control
Copyright: © BEST – Bioenergy and Sustainable Technologies GmbH
left: The vicious circle of high system temperatures (lock-in), right: The added value of low system temperatures
presentation of the different relations between system temperatures, supply structures, the effect on the system and the end users
Copyright: Ralf-Roman Schmidt, AIT
Economic effects of low system temperatures
Overview of the projected economic impact, according to the cost reduction gradient (CRG) in €/(MWh·°C), of reduced system temperatures
Copyright: Roman Geyer
PV Top Photovoltaic Markets - Global
PV Top Photovoltaic Markets - Global
Copyright: IEA PVPS
Countries with highest PV penetration 2020 - worldwide
Countries with highest PV penetration 2020 - 5% of the world electricity is 2020 covered by PV
Copyright: IEA PVPS
HP Inegration
Integration options of heat pumps in districts
Copyright: OST Wemhoener
BI-Generation
Hydraulic integration of the heat pump for BI-Generation
Copyright: AEE INTEC Gradl
BI-Generation Monitoring Results
Monitoring Data of the Operation of the heat pump
Copyright: AEE INTEC Gradl
Maximum supply temperature as a function of heat capacity
The graphic shows the maximum supply temperature of high-temperature heat pump technologies from different manufacturers as a function of the heat capacity. More information on the individual technologies is published on the IEA HPT Annex 58 website (https://heatpumpingtechnologies.org/annex58/task1/).
Copyright: Danish Technological Institute
General comparison between steam generation with natural gas-fired boilers and heat pump technologies
The graphic shows conventional steam generation with natural gas-fired boilers compared to steam generation with heat pump technologies. In steam generation with natural gas-fired boilers, the steam is generated at least at the highest pressure level needed in the production process and then expanded to lower pressure levels. In comparison, when generating steam with a heat pump, it is advantageous if only the amount of steam required at the corresponding pressure level is also generated at this pressure level. Expansion to a lower temperature level should be avoided when using heat pumps. More information on steam generation with heat pumps can be found in the IEA HPT Annex 58 Task 2 report (https://heatpumpingtechnologies.org/annex58/task-2-integration-concepts/).
Copyright: AIT Austrian Institute of Technology GmbH
Different integration levels of high-temperature heat pumps and their effects
The graphic shows various levels at which the integration of a high-temperature heat pump can take place, as well as the effects. A more detailed description can be found in the Task 3 report of the IEA HPT Annex 58 and in the guideline for the development of a decarbonization strategy (https://heatpumpingtechnologies.org/annex58/task-3/).
Copyright: Danish Technological Institute
Connections in the development of a decarbonization strategy
The graphic shows different parts and influencing factors in the development of a decarbonization strategy for an industrial company. More information can be found in the Task 3 report of the IEA HPT Annex 58 (https://heatpumpingtechnologies.org/annex58/task-3/).
Copyright: TU Graz und AIT Austrian Institute of Technology GmbH
t/h diagrams of the refrigerants R290 and R410A
The comparison of the t/h diagrams of the refrigerants R410A and R290 shown in the figure shows the higher evaporation enthalpy of R290 and the difference in the critical temperatures.
Copyright: Institut für Wärmetechnik, TU Graz
Volumetric cooling capacity of the refrigerants R290 and R410A
The figure shows the volumetric cooling capacity of R290 and R410A as a function of the dew point temperature.