Building modelling repository for energy analysis

Master Thesis by James William O’Sullivan.

Start date: 23-01-2017           End date: 25-06-2017

Abstract – Developing a repository that collects descriptions, drawings, plans, BIM models, simulation models and such like for all typical Danish buildings. With this repository established, we are able to estimate the demand of districts, cities and do many others things.

BIM: The Importance of Communication

Master thesis by Maria Herroros, December 2016

Winner of Innovation Competition “Sprirekassen” by Bikubenfonden, Feb. 2017.


Building Information Modeling (BIM) methods started to be implemented in the Architectural Engineering Construction sector (AEC) in order to make the industry more efficient, innovative and with better quality on the project delivery, reducing costs.  BIM replaces the traditional way of communication, 2D drawings, by using 3D models, where all data is gather in one place and all parties of the project can access to it. However, the transition of work methodology is a slow implementation process due the use of new tools and the need of skilled people, while the industry is not completely prepared yet.  Communication, is essential when using BIM method to achieve good results, avoiding misunderstandings, hence, BIM is a collaborative sharing process.

During different stages of a building project, there are minimum requirements that must be accomplished in the deliveries. When talking about BIM, it is meant to the level of development (LOD) of building model elements and BIM model level. The LOD specifies how accurate the model element is, and what information should contain. This concept is still confusing for most of the departments, and needs a deeper comprehension in the beginning of every project, also when there is a collaboration with international colleagues, who use other country standards. These issues could be accomplished by using effective communication tools.

The objective of this thesis is to build a solution, which will improve BIM communication between project disciplines, helping to understand LOD´s among project stages and cross countries. The solution is built according to the company demands, Arup engineers, focusing on the Mechanical Electrical Plumbing (MEP) department that divided between Copenhagen and London office, and data exchange between them in a case study project.

The method is created through a development process, which is documented in this report. The process consists in a first evaluation of the company´s needs and improvements required in the MEP department. Based on findings, a tool is created to improve information exchange between engineers, speed up workflow and achieve requirements, requested to deliver in every project stage. The tool is called BIMapping.  BIMapping is created as a web-based page, hence, all information is digitized and gathered in one place.

BIMapping, is presented in the main page interface. This main page is a single entry to all knowledge included, and represents a mapping on the standardization levels. The main page is divided into three main sections, which guides the user through the whole project process and gives a deep information of LOD and BIM levels, required at every point of the project for building services.

The solution is reviewed and tested by BIM experts, who contribute with their feedbacks to the development of BIMapping and future studies.

The tool should not be seen as a final solution, but as a startup initiative which was welcomed and appreciated by BIM experts, as a good element to be implemented in BIM project process.


Develop of a proof of concept for the utilization of data for an optimal and controllable indoor environment at the DTU Library Living Lab

Master thesis by Jørgen Falch Waarsøe, December 2016

Abstract – The library at DTU has a vision of improving the indoor climate by making the library more intelligent and by turning the entire library into a living lab. Researchers and students should be able to use the living lab to conduct ex-periments that can lead to a improved indoor climate in the library. The first phase in turning the library into a living lab involves removing all the lamps and replacing them with LEDs. While replacing the lamps the library will also install sensors that can be used as a part of the living lab. The DTU library is now looking for ideas to how the new lighting system and sensors can be an integrated part of the living lab.

This thesis is about developing a software system, which can help the living lab improve to the indoor climate, by taking advantage of the new LED lamps in the library. The system developed consists of an automation system and a smartphone app. The automation system can be configured by users of the living lab users to take input from sensors and adjust the lighting accordingly. The smartphone app is used by the library guests to adjust the lighting decided by the automation system.

The tests made showed that the software is working as intended and that it can be a useful tool for conducting experiments. However the initial tests show that an automated lighting system can be very distracting. Therefore it is important that users can override the automation system.

Supervisor: (Al)Fred Heller, DTU Civil Engineering, Denmark.

The thesis download version: thesis_s103801


Tools for Agile Commissioning of HVAC Systems

By Kevin Tran

Development and testing of smart system for balancing of ventilation ductworks based on Wireless Sensing Technology

The purpose of the thesis was to make the initial steps for future work of possible improvement and automations of the HVAC balancing procedures. To enable easy and automatized re-commissioning of the ventilation system in terms of pressure balancing, this project focused on developing such a system. In addition a simulation model was created representing the experimental setup of which the system were tested.
The methods applied in this thesis were initially concluded a literature review, and afterwards it were expanded to include both hardware development and simulation using the tool Simulink.
A simple wireless balancing tool were developed and able to both measure and control a damper position according to a user defined set point. The system performance initially showed a promising settling time and a relatively stable system response. The simulation model provided conformity of the proposed system dynamics.
In conclusion, the initial steps of improvement and automations of the air distribution system balancing procedures were made. The balancing tool proved being able to balance a single branch according to a given set point, along with a simulation model extending the balancing of two dampers, and thereby making the more complex future work possible.

Supervisors where: Jakub Kolarik, DTU Byg.

You can find the thesis master-thesis-kevin-tran-s093385.

Proposal: Ny væktøj til energiplanlænging i Kommuner

Der er udviklet et nyt værktøj til kommuner til deres energiplanlægning. Der søges en studerende der vil, sammen med f.eks. Lyngby Kommune og under supervision fra DTU Byg, undersøge denne nye metode.

Nyt værktøj vil styrke kommunernes klimaindsats

Energistyrelsen – 2016-10-26 09:23 CEST

Med et nyt it-værktøj fra Energi-, Forsynings- og Klimaministeriet bliver det nemmere for kommunerne at opstille regnskab for deres energiforbrug og udledning af drivhusgasser. Dermed bliver det mere enkelt at arbejde strategisk med energiplanlægning og deltage i internationale klimasamarbejder.

Det har hidtil været vanskeligt for kommunerne at opstille et regnskab for, hvor stort energiforbruget og udledningen af drivhusgasser er inden for de enkelte kommunegrænser. Indsamlingen af data har været ressourcekrævende og har ofte krævet hjælp fra eksterne konsulenter.

Med det nye værktøj, som Energi-, Forsynings- og Klimaministeriet står bag sammen med KL og Realdania, får kommunerne nu hjælp.

Energi- og CO2-regnskabet, som værktøjet kaldes, leverer ca. 80 pct. af alle nødvendige energi- og udledningsdata. Kommunerne skal altså ikke i samme omfang som tidligere hente data fra forskellige steder og får samtidig et bedre og mere ensartet overblik over deres energiforbrug, den vedvarende energiproduktion og drivhusgas­udledningerne i kommunen.

”Kommunernes indsats er afgørende i vores energiomstilling. Det er et spring fremad, at de nu får et bedre værktøj til at opstille energi- og klimaregnskaber. Det giver dem et bedre grundlag for at følge kommunens udvikling, og de, der vil, kan nemmere opsætte mål for den lokale energi- og klimaplanlægning. Jeg ser også et perspektiv i, at værktøjet kan gøre det nemmere for kommunerne at gå sammen om energiløsninger på tværs af kommunegrænser,” siger energi-, forsynings- og klimaminister Lars Chr. Lilleholt.

Støtter kommunernes strategiske energiplanlægning

Kommunernes energi­planlæggere og klimaansvarlige medarbejdere vil aktivt kunne bruge det nye værktøj i deres arbejde med strategisk energiplanlægning. Når der er konsistens i de anvendte metoder, kan resultaterne nemlig overføres direkte til de strategiske energiplaner.

”Anvendelige og tilgængelige data har længe været en udfordring, når vi i kommunerne har valgt at lave energikortlægninger. Det er vigtigt i vores arbejde med at kunne tilbyde mere grøn energi til forbrugerne. Nu har vi fået en håndsrækning fra statslig side, og det er vi rigtig glade for,” siger formand for KL’s Teknik- og Miljøudvalg Jørn Pedersen.

Styrker kommunernes internationale samarbejde

Energi- og CO2-regnskabet gør det samtidig nemmere for kommunerne at deltage i internationale samarbejder som The Global Covenant of Mayors. Med det nye værktøj kan de nu udtrække data i den internationale afrapporteringsstandard, der bruges på tværs af lande til at kortlægge byers klimaaftryk. Arbejdet med den internationale tilpasning af Energi- og CO2-regnskabet er finansieret af Realdania. Endvidere har Realdania sammen med Energistyrelsen finansieret færdiggørelse og drift af værktøjet i 2016.

”Den globale klimasituation fortæller os, at der er behov for fælles handling. Derfor er det vigtigt, at byerne kan løfte i flok også på tværs af landegrænser. Energi- og CO2-regnskabet gør nu det muligt for kommunerne at lave klimaregnskaberne, så de passer til den internationale standard, Jeg håber, at det samtidig kan få flere kommuner til at tilmelde sig The Global Covenant of Mayors, der er et af de vigtigste internationale vidensfællesskaber for byer, engageret i klimakampen,siger Realdanias adm. direktør, Jesper Nygård.

Energi- og CO2-regnskabet er udviklet af et konsortium bestående af Viegand Maagøe og NIRAS. Værktøjets udvikling har været forankret i Energistyrelsen.

Se Energi- og CO2-regnskabet på

Kontakt i Energi-, Forsynings- og Klimaministeriet:

Pressemedarbejder Rasmus Bjørn, mobil: 4172 9077,

Yderligere kontaktinfo:

Pressechef Ture Falbe-Hansen, Energistyrelsen, mobil: 25 13 78 46,

Jacob Byskov Kristensen, Energistyrelsen, tlf. 33 92 78 18,

Chefkonsulent Birthe Rytter Hansen, KL, mobil: 21 44 14 90,

Konsulent Camilla Rosenhagen, KL, mobil: 23 83 18 27,

Specialkonsulent Line Oxholm Thomsen, KL, mobil: 27 29 42 88,

Pressechef Pia Møller Munksgaard, Realdania, tlf. 29 69 52 49,

Proposal: Danish Building Energy Atlas

Let us imagine a Danish Atlas the shows all the buildings in Denmark and their sustainability impacts.Simple starts could be to show their potentials, energy usage, performance characteristics – such an example got from student project to Hackathon winner to spin-off company PicoDat and their solar potential calculator Sunmapper.

Each house belongs to a type of building that represents most of all buildings in Denmark – all these buildings could be represented by such “type building models” – You would take a stepup from the Tabula database typology and add some new building types for the newly built stock and the future building stock. Based on e.g. the BBR-registry, all buildings in Denmark could be mapped this way. We would simulate each of these buildings and find their energy demand hour by hour and hereby give a rough time series for the energy demand of all buildings, a simulation model in e.g. IDA-ICE, Be15 and other simulations tools, a BIM representation of each house type.

This collection would be a valuable repository of the Danish building stock that would make life easier for many city planer, energy planer and others.

Now many things can be done – you can visualize them on a GIS og map, you can generate a tool that is aggregating the energy demand for a given geographical area, a district, whatever…

Imagine to have a 3D model of all your buildings for whole Denmark. A simple one made on Sketchup is made by Niras for Århus and another one in Copenhagen. Why not starting at the DTU Campus where we have a lot of data already. You find it at This could look like this: 101-picture-3d

Now, let us move towards visualizing the energy parameters of the buildings – adding thermo pictures on the 3D could look like this:



Having a simple 3D – why not doubling to fully-fledged Revit-BIM models for central buildings? This way the simple shapes get “informed objects” that raise the bare quite a lot.

Alternatively, you can use Googles toolkit, such as Maps, Plans and implement this from the BIM to the G-Plan. How do we have to do such things – this is part of the project. You pick and choose and implement while you are documenting and sharing.

You are now able to place your “Internet of Things” sensors into your GIS-BIM-Plan visual models and connect them to the “Big Data Cloud” where all your data is collected.

The result will be a common resource that we all can utilize in our work, governmental bodies, private companies, universities and schools  – You have the resources, they are for free – just utilize them for your purposes.

If your are interested, contact (Al)Fred Heller.

Proposal: Batchelor Level: The typical Danish 2010, 2015 and 2020 building

Every time a student or researcher, also companies, have to find the demand for a typical building, they struggle with finding a good example to base the dimensioning on. Old buildings behave very different  but the new buildings behave probably rather similar for the main building body and the main energy system, as for the user influenced parts of the energy system, the variation is rather large. We will focus on the first part.

The aim of this Diploma Thesis is to find the energy demand for typical Danish buildings of different types for the 2010, 2015 and 2020.

You will have to describe the buildings (generic to cover as many as possible buildings variation in a few types), in CAD and BIM.

You will build up an advanced model for each type and compute the time series in hourly, possible other time intervals.

You publish the whole to the Internet for students and researchers to use.

Additional ideas: We can use cluster analysis and similar on big data sets to support your modelling work.

If your are interested, contact (Al)Fred Heller.

Proposal: Temporary Housings Performance Test

At large scale renovation projects, the people living in the flats have to find temporary housing for the period of renovation. At Sorgenfri, Virum, there are such housings, at DTU Campus there are others and for refuges, there is a project going on that rent temporary housings for municipalities.

The current project aims at giving a survey on such solutions, an analysis of the technical designs, the experiences with their thermal performance, their indoor environment and such like. Especially the solution proposed by Venligbolig is to be analyzed. Evt., if relevant additional solutions with better performance ought to be proposed on basis of simulations and evt. experiments.

Contact (Al)Fred Heller.

Proposal: Noise polution – or the opposite sound in cities

Are you interested in sounds in cities – Not too many are considering this – A project in this subject could bring you into an internship in Switzerland – What do you say to this proposal?
There are a number of issues you could work with – How do walls effect the sound within street canyons? All these glass facades, how do they impact on sound? Traffic noise …
You have to make the contact to the staff at DTU doing sound studies, we support with knowledge about buildings.

Contact (Al)Fred Heller.