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A Systematic Approach to Integrated Building Performance Assessment and Visualisation
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Service and Energy Systems.
2016 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The aim of this project was to develop a holistic approach to building-performance assessment without limiting it to energy use (usually expressed in kWh/m2/year), but rather include more parameters that represent the following aspects: Economic, environmental, and quality of service provided to the occupant/client. If it can be shown that buildings can be operated not only in an energy-efficient way, but also in a way that takes into consideration the needs of the occupants, a case could be built that a higher quality of indoor environment does not necessarily mean a higher economic impact. It is also important to show that having access to high-quality building-performance data leads to high-quality analysis and visualisation, and consequently to a chance to detect faults and improve building operation. To answer these questions, a large office building in Stockholm, Sweden was used as a case study. The building was equipped with energy meters and 1,700 sensor points, uniformly distributed over the occupied areas, that measured room temperature, duct temperature, occupancy presence/absence and supply airflow, in addition to other states. The data was processed using RStudio, and various types of visualisation plots were used, including carpet plots, masked scatter plots, bar plots, line graphs, and boxplots. The data pointed to some interesting results. First, just knowing the energy use is not sufficient for understanding the quality of the service provided to the occupants. Second, performing a thorough analysis of room unit data can detect faults. Third, using carpet plots for energy-data visualisation is effective for energy-use pattern recognition. Finally, visualising the building performance parameters in a parallel coordinate plot is a more informative representation of integrated building performance compared to the energy performance certificates typically used today. 

Place, publisher, year, edition, pages
Stockholm, Sweden: KTH Royal Institute of Technology, 2016. , 136 p.
Series
TRITA-IES, 2016:04
Keyword [en]
thermal comfort, energy consumption, building certifications, occupancy, modeling, presence, pattern recognition, Demand controlled ventilation, Indoor thermal environment, Occupancy, Time response, Energy use
National Category
Energy Systems
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-192563ISBN: 978-91-7729-103-9OAI: oai:DiVA.org:kth-192563DiVA: diva2:970903
Presentation
2016-09-27, M108, Brinellvägen 23, Stockholm, 13:00 (English)
Opponent
Supervisors
Funder
Swedish Energy Agency
Note

QC 20160916

Available from: 2016-09-19 Created: 2016-09-15 Last updated: 2016-09-20Bibliographically approved
List of papers
1. A Holistic Approach to Building Performance: A Case Study of an Office Building in Sweden
Open this publication in new window or tab >>A Holistic Approach to Building Performance: A Case Study of an Office Building in Sweden
2016 (English)In: CLIMA 2016 - proceedings of the 12th REHVA World Congress / [ed] Heiselberg, Per Kvols, Aalborg University, Department of Civil Engineering , 2016, Vol. 6, 246Conference paper (Refereed)
Abstract [en]

With the increase of building certification systems worldwide, the evaluation of building performance has been standardized. These certifications provide some points for indoor air quality and thermal comfort in reference to standards like ASHRAE 55 and ISO 7730. However, the assessment is performed taking into account whether the design fulfils the requirements of the standards, in addition to measurements and a survey of the occupants’ thermal comfort (Miljobyggnad Gold). In fact, this only ensures that the requirements are met at the time of the inspection and little is known about the building’s performance after the inspection.In order to analyze the thermal comfort of occupants, a lot of studies have been done applying either the rational or adaptive approach. The rational approach is based on a heat balance model of the human body, while the adaptive approach concentrates on what happens outside controlled environments taking into account the humans’ interaction with their surroundings.This paper presents a new methodology to assess building performance in a holistic manner. The key parameters that are considered include the energy use, the occupants’ thermal comfort, the environmental impact and the corresponding cost. An office building located in Stockholm, Sweden is used as a case study. The energy use is measured through installed energy meters, whereas the thermal comfort is assessed using the degree hours criteria, described in standard EN 15251 (2007).The results allow a better understanding of the correlation between the amount of used energy (kWh per square meter) and the quality of the delivered service. Moreover a long term monitoring of the building leads to a better understanding of how the building should be operated and in some instances to energy savings without compromising on the quality.

Place, publisher, year, edition, pages
Aalborg University, Department of Civil Engineering, 2016
Series
, CLIMA 2016 - proceedings of the 12th REHVA World Congress, 6
Keyword
thermal comfort, energy consumption, building certifications
National Category
Building Technologies
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-189746 (URN)87-91606-31-4 (ISBN)87-91606-36-5 (ISBN)
Conference
CLIMA 2016, the 12th REHVA World Congress
Note

QC 20160713

Available from: 2016-07-12 Created: 2016-07-12 Last updated: 2016-09-15Bibliographically approved
2. Calibrating symphonies
Open this publication in new window or tab >>Calibrating symphonies
2016 (English)In: CLIMA 2016 - proceedings of the 12th REHVA World Congress / [ed] Heiselberg, Per Kvols, Aalborg University, Department of Civil Engineering, 2016, Vol. 6, 225Conference paper (Refereed)
Abstract [en]

In this paper we address the general topic of calibrating initial Building Energy Performance Simulationmodels, iBEPS. We build upon a recently published paper entitled “Narrowing the Gap- A Framework for Connecting and Auto-Tuning a Design BPS Model to a Physical Building”to outline a methodology for calibrating iBEPS models. We highlight common trends and pitfallsencountered in iBEPS calibration studies, and propose strategies and a methodology for overcomingthese obstacles. The methodology is implemented and tested on IEA Annex 58 single housingmodel.

Place, publisher, year, edition, pages
Aalborg University, Department of Civil Engineering: , 2016
Keyword
building simulation, calibration, building energy performance
National Category
Engineering and Technology
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-189748 (URN)
Conference
CLIMA 2016 - 12th REHVA World Congress, 22-25 May 2016, Aalborg, Denmark - Aalborg, Denmark
Note

QC 20160713

Available from: 2016-07-12 Created: 2016-07-12 Last updated: 2016-09-15Bibliographically approved
3. Occupant Presence Modeling Using Random Forests
Open this publication in new window or tab >>Occupant Presence Modeling Using Random Forests
2016 (English)In: YRSB16 – iiSBE Forum of Young Researchers in Sustainable Building 2016 / [ed] Julie Železná, Petr Hájek, Jan Tywoniak, Antonín Lupíšek, Kateřina Sojková, Czech Technical University in Prague , 2016, 188-195 p.Conference paper (Other academic)
Place, publisher, year, edition, pages
Czech Technical University in Prague, 2016
Keyword
occupancy, modeling, presence, pattern recognition
National Category
Building Technologies
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-189747 (URN)978-80-01-05979-1 (ISBN)
Conference
YRSB16 – iiSBE Forum of Young Researchers in Sustainable Building 2016
Note

QC 20160713

Available from: 2016-07-12 Created: 2016-07-12 Last updated: 2016-09-27Bibliographically approved
4. Long-term performance assessment of autonomous demand controlled ventilation units: A case study of an office building in Sweden
Open this publication in new window or tab >>Long-term performance assessment of autonomous demand controlled ventilation units: A case study of an office building in Sweden
(English)In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178Article in journal (Refereed) Submitted
National Category
Building Technologies
Identifiers
urn:nbn:se:kth:diva-192630 (URN)
Note

QC 20160916

Available from: 2016-09-16 Created: 2016-09-16 Last updated: 2016-09-16Bibliographically approved

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