Solution#5: Energy demand modelling in buildi...

The solution "Energy demand modeling in buildings" offers methodologies for the modeling of energy demand and flexibility potentials for whole districts and cities. It includes a tool for bottom-up classification of buildings in a given area into certain types, which can be sum up and modeled by aggregation to ensure higher energy flexibility.

The solution for energy demand modelling in buildings applies to the optimization of building designs towards higher energy flexibility.

The solution Energy demand modeling in buildings covers a range of complex methodologies for the modelling of energy demand and flexibility potentials for whole districts and cities. With data from the main energy carriers which are heat, cooling, electricity and gas, buildings in a given area are classified and the sum is accumulated up to the aggregate level.



Modelling of greater energy flexibility in buildings is crucial to a city which in the future will be powered by 100% renewables.


ikon20Solution insights

The solution apply to a combination of measurements and a model that is validated by actual measurements. In this way the accuracy of the solution is improved with increasing number of data and improves by experience.

The methodology itself apply to two main aspects. Firstly, to analyze measured data from buildings and secondly, to classify them into types.

The resulting building types are modeled in dynamic building simulation tools and by aggregating the actual number of buildings in a given area the result can be compared with the overall energy demand for a given city or district.

In a second step, the thermal dynamics are examined to find flexibility. Here thermal capacities of the buildings in a given area, thermal storage tanks and similar storage capacity is used to adjust to the aggregated flexibility demand.

A schematic representation of the model of Sønderborg municipality’s energy system

A schematic representation of the model of Sønderborg municipality’s energy system showing the components and energy flows of the model for the 2029 scenarios. Energy sources and imports to the municipality’s energy system are shown on the left of the flow chart and energy services (demand) in the municipality are shown on the right. Rectangular fields denote energy conversion units and elliptical fields denote energy carriers and distribution networks. Biomass is indicated in green, electricity in blue, natural gas in orange and petroleum products in violet. For simplification, the schematic excludes energy storage facilities. Drawing by D. Sveinbjörnsson.

ikon6Further information

The project of CITIES Research Center is expected to continue on improving the solution until June 2017.

The solution “Energy demand modelling in buildings” was developed in main collaboration with Project Zero. Project Zero is a visionary initiative from the municipality Sønderborg in Southern Denmark. The organization is 100% committed to

creating a CO2-neutral growth area before 2029, creating and demonstrating new solutions, robust measurable CO2 reductions, new green jobs and a talented generation of young people.

In order to achieve its mission, Project Zero has been measuring the CO2 for Sønderborg for several years. This task turned out to be very demanding and their previous method provide limited accuracy. Now, with the solution of modeling energy demand in buildings in combinations with CITIES Data Management System the estimations of CO2 had become much more accurate and automated based on measurements.


Allan Schrøder Pedersen   Head of Section, DTU Energy  at DTU Energy

+ 45 46775705
Involved partners
Sønderborg Municipality

Member since September 2016

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Contact person Main Office + 45 88726400
Project Zero

Member since September 2013

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Contact person Peter Rathje

DTU Compute

Member since September 2013

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Why is DTU Compute part of CITIES?

As core-partner, DTU Compute is part of CITIES to accelerate its activities in the fields of renewable energy, in particular forecasting methods for wind energy, and demand response in power systems, as well as the use of smart data (data analytics) for the characterisation of buildings and supermarket refrigeration units.

What role does DTU Compute have in the project?

We provide invaluable contributions to CITIES through our expertise in modelling, treatment and management of data, statistics, forecasting and control. Furthermore our Head of Section, Prof. Henrik Madsen is the center leader of CITIES and some of our finest researchers are involved in demonstration projects.

What do DTU Compute expect to gain from being part of the project?

DTU Compute expects to be able to conduct valuable academic research in collaboration with partners.

Contact person Henrik Madsen + 45 45253408
DTU Civil Engineering

Member since September 2013

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Why is DTU Civil Engineering part of CITIES?

DTU Civil Engineering (DTU Byg) is a highly active player in CITIES Innovation Center in the research fields of high energy efficiency buildings and systems for energy supply and distribution.

What role does DTU Civil Engineering have in the project?

As a core-partner in CITIES through leadership of projects under Prof. Carsten Rode and Ass. Professor Alfred Heller’s role in the center management, we head research efforts on a variety of areas incl. solar energy and district heating.

What do DTU Civil Engineering expect to gain from being part of the project?

We expect to gain a valuable exchange with partners and hopefully also see cutting-edge scientific results on energy systems integration in the Nordic countries.

Contact person Main Office + 45 45251861
Aalborg University

Member since June 2013

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Why is Aalborg University part of CITIES?

Aalborg University is as a core-partner of CITIES, engaged with the Departments for Development and Planning as well as the Department for Civil Engineering under the leadership of Prof. Brian Vad Mathiesen.

What role does Aalborg University have in the project?

We contribute with our foremost knowledge on and experience in energy systems analysis, feasibility studies and the design of public regulation measures.

What do Aalborg University expect to gain from being part of the project?

We are very passionate and deeply engaged in the energy transition towards a 100% renewable future. With our engagement and efforts, we hope to engineer solutions which can accelerate this process and gain valuable insights and partnerships on the way.

Contact person Secretariat

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