MONITORING AND MODELING A HOUSING AIR CONDITIONED WITH HEAT PUMP IN KAYNAKLAR, İZMİR
Rahşan Aytül Gülmez RAAFAT1, Zeynep Durmuş Arsan2,
1,2 Institute of Technology Izmir, Faculty of Architecture, Izmir, Turkey
Abstract: In this study, the thermal and energy performance analysis based on monitoring and modeling results of a private house with a target of titled as low-energy building, and conditioned via air source heat pump are presented. The wider aim of this study is to achieve the calibrated digital performance simulation model of case building, enabling the prediction of future thermal and energy performance. The examined building is a three storeyed private house with 520 m2 total gross floor area, located in Kaynaklar, Izmir. It has been monitored for a total one year period between July 2009 and July 2010, including the measurement of local climate data and indicators of building thermal and energy performance. The modeling study is carried out with DesignBuilder building performance simulation software. Besides, the EnergyPlus software, supporting the entrance of detailed input data for the air source heat pump, is utilized in the modelling of HVAC system-related components of building. The impact of user on the performance is kept as out of scope in the modelling. The calibration iterations are conducted for one week between August 17 and 24, 2009 in order to represent the cooling period of 2009. At the end of the study, the results of digital model are compared with actual measured values, and the error ratios of calibrated model are presented.
DATA TRANSFER FROM BUILDING INFORMATION MODELING SOFTWARE TO ENERGY ANALYSIS TOOLS: TWO ALTERNATIVE METHODS
Ekin Gamze YÖNEY, Mustafa Emre İLAL, Zeynep DURMUŞ ARSAN
Izmir Institute of Technology Faculty of Architecture Department of Architecture 35430 İzmir
Abstract: Energy analysis software packages are tools for designers to assist in decreasing energy consumption of buildings. These tools can analyze various parameters of buildings under static and/or dynamic conditions and provide decision support for selecting design options that improve energy performance of buildings. They can be used both in retrofit projects as well as new constructions. Many alternatives exist, both commercial and open-source. Yet, they are rarely used by architects in the early stages of design where highest impact can be expected from energy analysis studies. With recent advances in Building Information Modeling (BIM), interoperability among energy analysis tools and architectural design environments have improved making these tools more accessible to architects. In this research, we present a study investigating the reliability of two alternative methods for transferring building geometry from architectural design environments into energy analysis tools. The first method involves data transfer from the commercial BIM system, ArchiCAD to the commercial energy analysis tool, DesignBuilder using gbXML files. The alternative option involves using the freely available design tool, SketchUp Make with a plug-in for the open-source analysis tool OpenStudio. Both analysis tools utilize Energy Plus which is regarded as a reliable simulation engine. For testing, an existing building with monitoring data was modeled in both design environments and simulated. The building was also modeled directly in DesignBuilder and simulated. The simulation results and monitoring measurements were compared. Results show that while small differences exist in the models created, these differences do not significantly affect simulation performance.
Keywords: Building Information Modelling, Energy Simulation, Early Architectural Design Phase
IMPACT OF THERMAL MASS FOR FUTURE ENERGY CONSUMPTION: CASE STUDY IN ADOBE HOUSE
Zeynep Durmuş Arsan1*, Ekin Gamze Yöney2,
1,2 Institute of Technology Izmir, Faculty of Architecture, Izmir, Turkey
*Corresponding author e-mail: firstname.lastname@example.org
Abstract: This paper examines thermal mass quality of building envelope as passive preventive phenomena for future energy consumption. It questions how much and what type of thermal mass is required for decreasing energy consumption according to future climate change. Summer energy performance of adobe house in Konya, Turkey is studied in terms of thermal mass characteristic by using dynamic simulation software. Measured and predicted microclimate data for 2017 and 2050s are used to compare passive impact of wall material choices, i.e. adobe, limestone, vertical hollow brick and volume of wall without night-time ventilation. In conclusion, the study reveals that thermal mass with lower density and thinner materials show higher energy performance for summers. Energy consumption is minimum with vertical hollow brick wall in 50 cm for 2017 and 30 cm for 2050s. It is deduced that thermal conductivity will still have higher impact than thermal mass on energy consumption.
Keywords: thermal mass; energy consumption; adobe brick; climate change; dynamic simulation.
PROCESS-CENTERED MODELING EXPERIENCE FROM ARCHITECT’S PERSPECTIVE: A CASE STUDY IN A RESIDENTIAL BUILDING IN İZMIR
MİMARIN BAKIŞ AÇISIYLA SÜREÇ-ODAKLI MODELLEME DENEYİMİ: İZMIR’DE BİR KONUTTA ALAN
Master Thesis by Rahşan Aytül Gülmez Raafat
Supervisor: Assoc. Prof. Dr. Zeynep Durmuş Arsan
Abstract: Predicting the current energy demand and future energy consumption of buildings is a challenge for architects from the design process on behalf of energy efficiency. Although there are various dynamic simulation tools that enable them to calculate energy performance, the complexity of the tools poses problems for architects to model, understand process-centered simulation studies and interpret the results. This thesis mainly aims to present, test and criticize the modeling, simulation and calibration processes of a building from an architect’s point of view. The most effective way to avoid the effects of global warming is by the immediate involvement of architects in this energy conscious process. Therefore, in this thesis, the main objective is to evaluate how the simulation process is carried out by an architect who knows the possibilities and limitations of the simulation process. In order to exemplify the process, the study deals with an existing residential building in İzmir, conditioned with an air-source heat pump. First of all, local climate conditions of the indoor and outdoor environment were monitored from July 2009 to June 2010. The digital model of the house was created by using the Design-Builder v5.2 dynamic simulation modeling tool, and calibrated for three different periods as heating, cooling and transition periods by indoor temperatures data energy consumption of the heat pump. During modeling and simulation, the problems faced by an architect using the simulation tool, based on professional knowledge and program were exemplified. Finally, a survey was conducted to question the importance of the role of architect users in the process. The field study presented in this thesis is important to see how the architect conducts a process-centered simulation. The survey showed that the role of architect users in the early stages of the design is more important. Mechanical system modeling, especially in renewable systems, is still an issue requiring knowledge and experience for architect users.
EFFECT OF NATURAL WALL MATERIALS ON ENERGY CONSUMPTION IN CONTINENTAL AND MEDITERRANEAN CLIMATES
KARASAL VE AKDENİZ İKLİMLERİNDE DOĞAL DUVAR MALZEMELERİNİN ENERJİ TÜKETİMİ ÜZERİNE ETKİSİ
Master Thesis by Ekin Gamze Yöney
Supervisor: Assoc. Prof. Dr. Mustafa Emre İlal
Abstract: Concern on earth and other natural building materials has been increased by rise of energy shortage and environmental problems. Not only the speed, quality and standardization in the production process of natural building materials should be improved, but also energy consumption of buildings constructed with these materials should be on acceptable levels in order to expend their usage. This study investigates the relationship between natural wall materials and energy consumption on two adobe buildings from Continental and Mediterranean climates. Totally 20 different wall options, composed of adobe, vertical hollow brick, limestone, hempcrete and strawbale with 0.30- and 0.50-meter thickness without and with flax thermal insulation material are tested with different combinations of direction and climate. The digital models of case buildings in Continental and Mediterranean climates are created to examine the question of in what climate and which direction a wall material is appropriate for energy efficient design. Consequently, strawbale enables the minimum annual energy consumption both for Mediterranean and Continental climates, while adobe shows better energy performance in summer period of Continental climate. Besides, it is observed that the energy consumption for cooling in case building of Mediterranean climate is 10 times more than of Continental one for whatever material is tested. The quantitative research conducted with different natural wall materials makes it a logical choice in terms of opening the path of industrialization that is supported by the aim of this thesis.