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Mahapatra, Krushna
Publications (10 of 83) Show all publications
Jalilzadehazhari, E., Johansson, P., Johansson, J. & Mahapatra, K. (2017). Application of analytical hierarchy process for selecting an interior window blind. Architectural Engineering and Design Management, 13(4), 308-324.
Open this publication in new window or tab >>Application of analytical hierarchy process for selecting an interior window blind
2017 (English)In: Architectural Engineering and Design Management, ISSN 1745-2007, E-ISSN 1752-7589, Vol. 13, no 4, p. 308-324Article in journal (Refereed) Published
Abstract [en]

Window blinds have a substantial role in shaping the energy consumption and improving thermal comfort and visual comfort. However, difficulties in selecting a window blind remain, due to existence of potential conflicts between visual, thermal, energy and life cycle cost. To overcome this problem, this study evaluates the performance of interior blinds, including venetian with slat of 0° and 45°, roller and double pleated blinds with respect to visual, thermal, energy and life cycle cost. Later, the Analytical hierarchy method (AHP) is used for selecting the best blind based on trade-off among the visual, thermal, energy and life cycle cost. In using AHP, visual comfort is determined as most important objective with a weight of 52%. The results show that venetian blind with slat of 0° drawn 100% is the trade-off blind. Accomplishing the sensitivity analysis on blinds’ global weight shows that venetian blind with slat of 0° drawn 100% remains the trade-off blind until the weight of energy and life cycle cost is below 37% and 57% respectively and the weight of visual comfort is above 4%. However, changing thermal comfort weight has no impact on ranking of the blinds. This study shows the capability of AHP in managing the conflicts.

Keyword
Interior window blinds, Analytical hierarchy process, Energy consumption, Life cycle cost, Thermal comfort, Visual comfort
National Category
Architectural Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-62606 (URN)10.1080/17452007.2017.1324402 (DOI)
Available from: 2017-04-26 Created: 2017-04-26 Last updated: 2017-09-14Bibliographically approved
Hemström, K., Mahapatra, K. & Gustavsson, L. (2017). Architects’ perception of the innovativeness of the Swedish construction industry. Construction Innovation, 17(2), 244-260.
Open this publication in new window or tab >>Architects’ perception of the innovativeness of the Swedish construction industry
2017 (English)In: Construction Innovation, ISSN 1471-4175, E-ISSN 1477-0857, Vol. 17, no 2, p. 244-260Article in journal (Refereed) Published
Abstract [en]

Purpose – The aim of this paper is to enhance the understanding of architects’ perceptions of the propensityto adopt innovations in building construction.

Design/methodology/approach – Based on a theoretical underpinning of the multilevel perspective on socio-technical transitions, a web-based questionnaire (n = 412) was used to empirically investigate Swedish architects’ perceptions of innovativeness in the building construction industry. Specifically, the study looks at perceptions of the level of innovativeness (propensity to adopt innovations), relevant barriers to the adoption of innovations, the influence of different actors and ways of facilitating innovativeness.

Findings – Architects perceive a low level of innovativeness in the Swedish building construction industry because of a number of barriers of varying relevance. These barriers belong to interwoven regulative,normative and cognitive rules (i.e. institutions) that guide actor behaviour, which contribute to the path dependency of the industry. The site-specific nature of building construction, promotional activities from suppliers and the level of competition in the industry is perceived as being of little relevance. The findings suggest that a number of interventions are necessary to facilitate innovativeness of the Swedish construction industry. To change the lock-in mechanisms of the established cognitive and normative rules, regulative rulesneed to change as well. According to architects, contractors and construction clients are the most influentialand therefore have the most power to change the rules associated with path dependency.

Research limitations/implications – The focus on a single construction professional in Sweden necessitates a discussion on these perceptions from the standpoint of other actors.

Practical implications – Architects perceive a need for change in the construction industry and suggestthat changed regulative rules can help overcome path dependency and facilitate innovativeness. Considering the strong interrelatedness of the lock-in mechanisms that guide the actors of the industry, policies may be needed to encourage and support the establishment for more sustainable development.

Originality/value – A multilevel perspective is used to analyse the type of barriers to innovativeness that the architects perceive as relevant and how they contribute to the resistance to change and path dependency in the building construction sector.

Keyword
Construction, Innovation, Sweden, Barriers, Perceptions, Architects
National Category
Architectural Engineering
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
urn:nbn:se:lnu:diva-62587 (URN)10.1108/CI-06-2015-0038 (DOI)
Available from: 2017-04-25 Created: 2017-04-25 Last updated: 2018-02-14Bibliographically approved
Jalilzadehazhari, E., Mahapatra, K. & Johansson, P. (2017). Increasing perceived control for enhancing subjective well-being in selecting windows and blinds: a conceptual framework. Architectural Engineering and Design Management.
Open this publication in new window or tab >>Increasing perceived control for enhancing subjective well-being in selecting windows and blinds: a conceptual framework
2017 (English)In: Architectural Engineering and Design Management, ISSN 1745-2007, E-ISSN 1752-7589Article in journal (Refereed) Submitted
National Category
Architectural Engineering
Identifiers
urn:nbn:se:lnu:diva-65866 (URN)
Available from: 2017-06-27 Created: 2017-06-27 Last updated: 2018-02-15
Jalilzadehazhari, E. & Mahapatra, K. (2017). Multivariate linear regression model for estimating average daylight illuminance. Paper presented at International Conference on Architecture and Built Environment. October 5–6, 2016, Kuala Lampur, Malaysia. Advanced Science Letters, 23(7), 6163-6167.
Open this publication in new window or tab >>Multivariate linear regression model for estimating average daylight illuminance
2017 (English)In: Advanced Science Letters, ISSN 1936-6612, E-ISSN 1936-7317, Vol. 23, no 7, p. 6p. 6163-6167Article in journal (Refereed) Published
Abstract [en]

Window design and the selection of glazing system have significant effect on daylight illuminance. Occupants’ productivity is highly dependent on daylight, as it associates with numerous health advantages. Hence conducting a systematic investigation considering the performance of various window designs and glazing systems is highly important at the early stage of design process. For this purpose, this study attempts to develop a multivariate linear regression model for estimating the average daylight illuminance. To perform the simulations, an office room prototype was modelled by COMFEN 5Beta software. The prototype is a hypothetical office room, as its size, HVAC system and envelopes construction are based on the common practice in construction in Sweden. Because average daylight illuminance is sensitive to window size, orientation, glazing system, design model and position, 544 simulations were performed based on thses variable to create an extensive dataset.  A multivariate linear regression model was developed based on 90% dataset, which was chosen randomly. The obtained R² value was exceeded 96%, which shows an excellent fit for the developed model. The interaction between variables was also studied. The remaining 10% of dataset was utilized for validating the developed model. The validity of the model was further compared with another multivariate linear regression model, developed based on 50% of the dataset.The results show the effectiveness of multivariate linear regression models in supporting architects and predicting average daylight illuminance in early stage of design analysis.

Publisher
p. 6
Keyword
Multivariate linear regression, Daylight Illuminance, interaction analysis
National Category
Architectural Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-59687 (URN)10.1166/asl.2017.9228 (DOI)
Conference
International Conference on Architecture and Built Environment. October 5–6, 2016, Kuala Lampur, Malaysia
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-11-23Bibliographically approved
Jalilzadehazhari, E. & Mahapatra, K. (2017). Multivariate linear regression model for estimating total energy consumption. In: : The 3rd Asia conference of International Building Performance Simulation Association - ASim2016, Nov. 27-29, 2016, South Korea. Paper presented at The 3rd Asia conference of International Building Performance Simulation Association - ASim2016, Nov. 27-29, 2016, South Korea. International Building Performance Simulation Association (IBPSA).
Open this publication in new window or tab >>Multivariate linear regression model for estimating total energy consumption
2017 (English)In: : The 3rd Asia conference of International Building Performance Simulation Association - ASim2016, Nov. 27-29, 2016, South Korea, International Building Performance Simulation Association (IBPSA), 2017, , p. 8Conference paper, Published paper (Refereed)
Abstract [en]

Windows as essential elements of buildings have a significant effect on total energy consumption, including heating and cooling demand in Sweden. A statistical reliable model for estimating the total energy consumption associated with various window designs and glazing systems helps architects and designers in the early stage of the design process. Most of the introduced models in literature utilized a mathematic sampling algorithm such as Monte Carlo to develop a simple linear regression model for estimating the total energy consumption. A simple linear regression model cannot describe the effect of different groups of a categorical variable. Hence this study considers four variables related to the window characteristics, including window size, design model, orientation, glazing system and develops a categorical multiple linear regression model for estimating the total energy consumption. 544 simulations were performed by COMFEN Beta5 software. The results were used as a database for developing a categorical multiple linear regression model. The accuracy of developed model was studied by the coefficient of determination, R- square value (R²). The obtained R² exceeded by 94%. Furthermore, the predicted total energy consumptions obtained by the developed regression model were compared with the simulated values by COMFEN software. Results show a strong linear relationship between predicted and simulated values.  Developed multivariate linear regression model can be utilized in early stage of design process for estimating the total energy consumption associated with various window designs and glazing systems.

Place, publisher, year, edition, pages
International Building Performance Simulation Association (IBPSA), 2017. p. 8
Keyword
Multiple linear regression, categorical variable, interaction analysis
National Category
Architectural Engineering
Identifiers
urn:nbn:se:lnu:diva-59689 (URN)
Conference
The 3rd Asia conference of International Building Performance Simulation Association - ASim2016, Nov. 27-29, 2016, South Korea
Note

Ej belagd 170627

Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-06-28Bibliographically approved
Bonakdar, F., Sasic Kalagasidis, A. & Mahapatra, K. (2017). The Implications of Climate Zones on the Cost-Optimal Level and Cost-Effectiveness of Building Envelope Energy Renovation and Space Heat Demand Reduction. Buildings, 7(2), Article ID 39.
Open this publication in new window or tab >>The Implications of Climate Zones on the Cost-Optimal Level and Cost-Effectiveness of Building Envelope Energy Renovation and Space Heat Demand Reduction
2017 (English)In: Buildings, ISSN 2075-5309, E-ISSN 2075-5309, Vol. 7, no 2, article id 39Article in journal (Refereed) Published
Abstract [en]

The cost-optimal level of energy performance for buildings shall be identified according to the European directive of 2010. The Swedish building stock needs comprehensive knowledge and an overall strategy for the cost-optimal level of renovation. This paper studies the contribution of Swedish climate zones to the cost-optimal level of renovation on a multi-story residential building in Sweden from the building owner perspective. The building space heat demand is simulated for four Swedish climate zones. The net present profit (NPP) method is defined and used in this study in order to analyze the cost-optimal level and the cost-effective renovation of building envelope components (e.g., attic floor, basement walls, exterior walls and windows). The implication of different discount rates is studied, as well. The results show that the optimum renovation of the building envelope offers 51% more energy savings for space heating when the building is in a northern climate zone compared to a southern zone. The study suggests that different renovation strategies for the building stock renovation need to be identified, separately, for each climate zone. The NPP analysis identifies the minimum required investment and maximum achievable energy savings that are needed to have a cost-effective renovation. The broad range of studied climate zones provides the opportunity to apply the obtained results to other climate zones by either interpolation or extrapolation of NPPs for the buildings with similar characteristics.

National Category
Building Technologies
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
urn:nbn:se:lnu:diva-65751 (URN)10.3390/buildings7020039 (DOI)
Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2017-11-29Bibliographically approved
Munkacsi, N. & Mahapatra, K. (2017). The role of social influence in the end customer purchasing decisions on the heat market. In: Proceedings from eceee Summer Studies: . Paper presented at ECEEE 2017 Summer Study, 29 May - 2 June, Belambra Les Criques, France. European Council for an Energy Efficient Economy (ECEEE).
Open this publication in new window or tab >>The role of social influence in the end customer purchasing decisions on the heat market
2017 (English)In: Proceedings from eceee Summer Studies, European Council for an Energy Efficient Economy (ECEEE), 2017Conference paper, Published paper (Refereed)
Abstract [en]

The aim of this paper is to examine the role of social influence on the end customer behaviour in the purchase of heating products in residential segment. The study is based on interviews and questionnaire survey of homeowners in Hungary in 2013. Respondents are open to learn about diverse innovative heating technologies, energy types and diverse heating fuels irrespective of any purchase intention. They plan their purchase based on deliberate considerations rather than facing an emergency heating appliance breakdown. Furthermore, influence of the social environment prevails at the diverse stages of the purchase process. End customers actively conduct social search (family, friends, neighbours, colleagues, other customers with purchase experience over the Internet, etc.) besides the influencing role of the installer.

Place, publisher, year, edition, pages
European Council for an Energy Efficient Economy (ECEEE), 2017
National Category
Energy Systems
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
urn:nbn:se:lnu:diva-62588 (URN)978-91-983878-1-0 (ISBN)978-91-983878-0-3 (ISBN)
Conference
ECEEE 2017 Summer Study, 29 May - 2 June, Belambra Les Criques, France
Projects
Social influence, communication, information, decision, household, heat
Available from: 2017-04-25 Created: 2017-04-25 Last updated: 2017-10-23Bibliographically approved
Mahapatra, K. & Olsson, S. (2015). Energy performance of two multi-storey wood-frame passive houses in Sweden. Buildings, 5, 1207-1220.
Open this publication in new window or tab >>Energy performance of two multi-storey wood-frame passive houses in Sweden
2015 (English)In: Buildings, ISSN 2075-5309, E-ISSN 2075-5309, Vol. 5, p. 1207-1220Article in journal (Refereed) Published
Abstract [en]

Two eight-story wood-framed residential buildings with the Swedish 2012passive house standard were built in 2009 in the Portvakten Söder quarter in the city of Växjöin Sweden. In this paper, we present the monitored specific energy use of the buildings andcompare to the requirements of the Swedish building code and recommendation for passivehouses. We also estimated the primary energy use and CO2 emissions and investigated thetenants’ views and experiences of the two buildings. Results show that the actual specificenergy use of 40.2 kWh/m2Atemp/year in the Portvakten Söder building fulfills, by a goodmargin, the requirements of the Swedish building code and the recommended passive housestandard, but is higher than projected. Applying a marginal perspective, the calculatedprimary energy use and carbon dioxide emission from operating the buildings (excludinghousehold electricity) was 40 kWh/m2Atemp/year and zero, respectively. Responses of 20 tenantsto a mail-in questionnaire survey showed that over 90% were satisfied with their apartments.

Keyword
passive house; wood building; energy use; monitoring; behavior
National Category
Civil Engineering
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-49997 (URN)10.3390/buildings5041207 (DOI)2-s2.0-84958765897 (Scopus ID)
Available from: 2016-03-01 Created: 2016-03-01 Last updated: 2017-11-30Bibliographically approved
Mahapatra, K. (2015). Energy use and CO2 emission of new residential buildings built under specific requirements: The case of Växjö municipality, Sweden. Applied Energy, 152, 31-38.
Open this publication in new window or tab >>Energy use and CO2 emission of new residential buildings built under specific requirements: The case of Växjö municipality, Sweden
2015 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 152, p. 31-38Article in journal (Refereed) Published
Abstract [en]

The Växjö municipality sets specific energy related requirements beyond the Swedish building code (BBR) when selling land for the construction of new residential buildings. The requirement for Östra Lugnet residential area was that all buildings must be connected to the local district heating network and installation of heat pumps was prohibited in developer-built group/row houses. This paper (a) analyzed if the energy use of the buildings fulfilled the requirements of the BBR and that of Växjö municipality, and (b) compared the primary energy use and CO2 emission from operation of the district heated buildings with hypothetical scenarios where only air-source or bedrock heat pumps were installed. Results showed that a significant proportion of the group/row houses did not fulfil the specific energy use requirements of the BBR and that of Växjö municipality. There were large variations between predicted and actual energy use. Using a marginal accounting approach, houses with district heating were found to have the lowest carbon emission. From this perspective it seems appropriate for Växjö municipality to set the requirement that new residential buildings in Östra Lugnet be connected to the local district heating network.

Keyword
Municipality;Building code; Energy use; District heating; Heat pump; Residential buildings
National Category
Civil Engineering Energy Engineering
Research subject
Technology (byts ev till Engineering)
Identifiers
urn:nbn:se:lnu:diva-43014 (URN)10.1016/j.apenergy.2015.04.089 (DOI)000356745200004 ()2-s2.0-84928986655 (Scopus ID)
Available from: 2015-05-08 Created: 2015-05-08 Last updated: 2017-12-04Bibliographically approved
Hemström, K., Gustavsson, L. & Mahapatra, K. (2014). Contractor Perceptions of Very Energy Efficient New Multi-Story Residential Buildings. In: World Sustainable Building 2014 Barcelona Conference: Sustainable Buildings: Results ; Are We Moving as Quickly as We Should? It's Up to Us!. Paper presented at World Sustainable Building Conference, October 28/30th 2014, Barcelona. GBCe.
Open this publication in new window or tab >>Contractor Perceptions of Very Energy Efficient New Multi-Story Residential Buildings
2014 (English)In: World Sustainable Building 2014 Barcelona Conference: Sustainable Buildings: Results ; Are We Moving as Quickly as We Should? It's Up to Us!, GBCe , 2014Conference paper, Published paper (Refereed)
Abstract [en]

To facilitate design of policies and strategies which aim to promote a sustainable development of the built environment, a deeper understanding of factors influencing the decisions taken in construction projects is needed. This study investigates Swedish contractors’ perceptions of the new-build of very energy efficiency multi-storey residential buildings (e.g. passive houses). The results of interviews with twenty selected contracts managers disclose several perceived disadvantages and risks associated with such buildings which influence the interest to invest in high energy efficiency. These include several cost and market-related issues as well as issues relating to the performance of the buildings. Without market intervention it seems unlikely that very energy efficient multi-storey residential buildings will diffuse to any substantial degree within the Swedish construction industry.

Place, publisher, year, edition, pages
GBCe, 2014
Keyword
Contractors, energy efficiency, perceptions, barriers, drivers
National Category
Social Sciences Interdisciplinary Energy Systems Building Technologies
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-37969 (URN)978-84-697-1815-5 (ISBN)
Conference
World Sustainable Building Conference, October 28/30th 2014, Barcelona
Available from: 2014-11-03 Created: 2014-11-03 Last updated: 2018-01-11Bibliographically approved
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