lnu.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 90) Show all publications
Bravo, G., Pardalis, G., Mahapatra, K. & Mainali, B. (2019). Physical vs. Aesthetic Renovations: Learning from Swedish House Owners. Buildings, 9(1), Article ID 12.
Open this publication in new window or tab >>Physical vs. Aesthetic Renovations: Learning from Swedish House Owners
2019 (English)In: Buildings, ISSN 2075-5309, E-ISSN 2075-5309, Vol. 9, no 1, article id 12Article in journal (Refereed) Published
Abstract [en]

In this paper, we identify the socio-economic attributes and attitudes that have influencedhouse owners in renovating their homes in the past. Our study is based on responses to an onlinequestionnaire survey of 971 house owners living in Kronoberg County in Sweden. Results showedthat the interest and willingness of the house owners to perform a renovation varied dependingon their demographic background and the age of the house. The latter positively affected pastrenovations, only when combined with the residence time. Furthermore, the age of house ownersstrongly and positively affected the probability of performing aesthetic type of renovations, becauseof a long time of residence in the house. Younger, town living, and highly educated house ownersseem to be more concerned regarding saving energy, which motivated them to perform physicalrenovations on their house. Our results also suggest that income, level of education, and place ofresidence have an effect on renovation decisions only through their effect on the energy concern ofhouse owners, and a varied effect on renovation decisions, when combined with the time of residencein the house.

Keywords
house owners, renovations, physical renovations, aesthetic renovations, decision-making
National Category
Energy Systems Environmental Management
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
urn:nbn:se:lnu:diva-79411 (URN)10.3390/buildings9010012 (DOI)
Funder
The Kamprad Family Foundation
Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-17
Jalilzadehazhari, E. & Mahapatra, K. (2019). The most cost-effective energy solution in renovating a multi-family house. In: Johansson, Dennis, Bagge, Hans, Wahlström, Åsa (Ed.), Cold Climate HVAC 2018, The 9th International Cold Climate Conference Sustainable new and renovated buildings in cold climates Kiruna – Sweden 12-15, March 2018: . Paper presented at Cold Climate HVAC 2018 The 9th International Cold Climate Conference Sustainable new and renovated buildings in cold climates Kiruna – Sweden 12-15, March 2018. Springer
Open this publication in new window or tab >>The most cost-effective energy solution in renovating a multi-family house
2019 (English)In: Cold Climate HVAC 2018, The 9th International Cold Climate Conference Sustainable new and renovated buildings in cold climates Kiruna – Sweden 12-15, March 2018 / [ed] Johansson, Dennis, Bagge, Hans, Wahlström, Åsa, Springer, 2019Conference paper, Published paper (Refereed)
Abstract [en]

The Swedish government aims to reduce total energy demand per heated building area by 50% until 2050.  A large number of residential buildings, built within the so-called “Million homes program” in Sweden, need major renovations, which offers an opportunity to implement energy efficiency measures and thereby, reduce total energy demand. The best way to encourage the implementation of a major renovation is to demonstrate a practical method which reduces energy demand and provides economic benefits. Hence, this study aims to determine the most cost-effective energy solution in renovating a multi-family residential building. Multiple energy renovation measures were simulated on a case study to reduce the space heating and domestic hot water by 50%.  The case study building was built within the “Million homes program” and is located in Växjö, Swedish climate zone 3. Design Builder software was used for analysing the pre-renovation energy performance of the building. The renovation measures comprised different insulation thicknesses of external walls, attic and ground floors, windows with different U-values, a mechanical ventilation with heat recovery system, and solar system for supporting space heating and domestic hot water. Later, a multi-objective optimization was accomplished for analysing every possible combination of renovation measures.  The most cost-effective energy solution was obtained by calculating the net present value in a lifetime of 30 and 50 years and discount rate of 1%, 3% and 5%. Comparing the implications of two different lifetimes on net present value with implications of three different discount rates on net present value shows that lifetime has more influence on net present value. Furthermore, the results show the capability of the multi-objective optimization method in analysing multiple renovation solution.

Place, publisher, year, edition, pages
Springer, 2019
Series
Springer Proceedings in Energy, ISSN 2352-2534
Keywords
Net present value, Energy renovation measures, Multi-objective optimization
National Category
Environmental Analysis and Construction Information Technology
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
urn:nbn:se:lnu:diva-72220 (URN)978-3-030-00661-7 (ISBN)
Conference
Cold Climate HVAC 2018 The 9th International Cold Climate Conference Sustainable new and renovated buildings in cold climates Kiruna – Sweden 12-15, March 2018
Projects
ProWood
Funder
Knowledge Foundation, 20130245
Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2018-09-04Bibliographically approved
Mahapatra, K., Alm, R., Hallgren, R., Bischoff, L., Tuglu, N., Kuai, L., . . . Umoru, I. (2018). A behavioral change-based approach to energy efficiency in a manufacturing plant. Energy Efficiency, 11(5), 1103-1116
Open this publication in new window or tab >>A behavioral change-based approach to energy efficiency in a manufacturing plant
Show others...
2018 (English)In: Energy Efficiency, ISSN 1570-646X, E-ISSN 1570-6478, Vol. 11, no 5, p. 1103-1116Article in journal (Refereed) Published
Abstract [en]

In the realm of industrial energy efficiencystudies, very little research has been done to understandthe barriers and opportunities to influence behavior ofproduction workers and the corresponding energysavingpotentials. This paper analyzes a case study ofVolvo Construction Equipment AB in Braås, Sweden(VCE Braås), that has reduced its relative idle electricityuse by more than 10 percentage points during 2013–2016 by implementing a strategy of changing everydaybehavior of production workers. The results based oninterviews with actors involved in the energy efficiencyproject showed that a concrete goal, the employment ofa fulltime operational leader who earlier worked as aproduction worker at VCE Braås, and the involvementof both the leadership and employees in project managementwere key to the success of the project.

Place, publisher, year, edition, pages
Springer, 2018
Keywords
Industry, Energy efficiency, Energy management, Behavior
National Category
Reliability and Maintenance
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
urn:nbn:se:lnu:diva-70948 (URN)10.1007/s12053-017-9581-9 (DOI)000432748200004 ()
Available from: 2018-02-15 Created: 2018-02-15 Last updated: 2018-07-12Bibliographically approved
Jalilzadehazhari, E. & Johansson, J. (2018). Applying a decision-making framework for resolving conflicts when selecting windows and blinds. Architectural Engineering and Design Management
Open this publication in new window or tab >>Applying a decision-making framework for resolving conflicts when selecting windows and blinds
2018 (English)In: Architectural Engineering and Design Management, ISSN 1745-2007, E-ISSN 1752-7589Article in journal (Refereed) Epub ahead of print
Abstract [en]

The selection of the most appropriate window and blind design is a challenging task due to the existence of potential conflicts between visual comfort, thermal comfort, energy consumption and life cycle cost. Resolving these conflicts relies on a trade-off window and blind design. This research applied a decision-making framework to select a trade-off window and blind design for an office room in Sweden. The decision-making framework was developed based on integrating the non-dominated sorting genetic algorithm-II and the analytical hierarchy process. The first step in the application of the framework was to generate a model of the office room using EnergyPlus. Six types of window and four types of blind; an internal venetian blind, an internal roller curtain, an external venetian blind and an external overhang panel, were modelled in EnergyPlus. The second step was to run an optimisation using non-dominated sorting genetic algorithm-II. For this purpose, various window and blind design variables were specified in modeFRONTIER platform. The third and last step in the application of the decision-making framework was to select a trade-off window and blind design using analytical hierarchy process. The results show the strength of the decision-making framework in selecting a trade-off design, and thereby the ability to resolve conflicts through intelligent use of simulation in analyzing big-data in built environment, energy and cost sectors. Since, the computation and processing power for performing simulations is constantly increasing, architects and designers can exploit the decision-making framework and locate a trade-off design in a relatively short period of time.

Place, publisher, year, edition, pages
Taylor & Francis, 2018
Keywords
Decision-making, big data, optimisation, non-dominated sorting genetic algorithm II, analytical hierarchy process, trade-off design
National Category
Architectural Engineering
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
urn:nbn:se:lnu:diva-79039 (URN)10.1080/17452007.2018.1550383 (DOI)
Projects
ProWood
Funder
Knowledge Foundation, 20130245
Available from: 2018-12-01 Created: 2018-12-01 Last updated: 2018-12-03
Jalilzadehazhari, E., Johansson, P., Johansson, J. & Mahapatra, K. (2018). Developing a decision-making framework for resolving conflicts when selecting windows and blinds. Architectural Engineering and Design Management
Open this publication in new window or tab >>Developing a decision-making framework for resolving conflicts when selecting windows and blinds
2018 (English)In: Architectural Engineering and Design Management, ISSN 1745-2007, E-ISSN 1752-7589Article in journal (Refereed) Epub ahead of print
Abstract [en]

Windows and blinds play a significant role in both shaping energy consumption and enhancing indoor comfort. But there are still difficulties with selecting windows and blinds due to the existence of potential conflicts between visual comfort, thermal comfort, energy consumption and life cycle cost. A literature review was conducted with the purpose of developing a decision-making framework that resolves the conflicts, and allows selecting a window and blind design based on trade-off between visual comfort, thermal comfort, energy consumption and life cycle cost. The decision-making framework was developed by integrating non-dominated sorting genetic algorithm-II as an optimisation algorithm with analytical hierarchy process as a multi-criteria decision-making method. The optimisation algorithm considers different window and blind design variables and analyses multiple designs, while the multi-criteria decision-making method ranks the optimization results and selects a trade-off design. An operating package enabled the decision-making framework to be automated. The operating package was obtained by coupling EnergyPlus as a simulation tool and modeFRONTIER as an integration platform. The decision-making framework was developed to select a trade-off window and blind design through intelligent use of simulation in analysing big-data in built environment, energy and cost sectors. Application of the framework ensures the minimum visual and thermal comfort thresholds with the lowest energy demand and cost. Architects and designers can use the framework during the design or renovation phase of residential and commercial buildings.

 

Keywords
Trade-off design, big-data, optimization, multi-criteria decision-making, non-dominated genetic algorithm II, framework design, analytical hierarchy process
National Category
Architectural Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-65866 (URN)10.1080/17452007.2018.1537235 (DOI)
Funder
Knowledge Foundation
Available from: 2017-06-27 Created: 2017-06-27 Last updated: 2018-12-03
Mahapatra, K., Mainali, B. & Pardalis, G. (2018). Homeowners’ attitude towards one-stop-shop business concept for energy renovation of detached houses in Kronoberg, Sweden. In: 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China.
Open this publication in new window or tab >>Homeowners’ attitude towards one-stop-shop business concept for energy renovation of detached houses in Kronoberg, Sweden
2018 (English)In: 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China, 2018Conference paper, Oral presentation with published abstract (Refereed)
Keywords
attitude, one-stop-shop; energy renovation; deep renovation
National Category
Social Sciences Interdisciplinary Building Technologies
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
urn:nbn:se:lnu:diva-78548 (URN)
Conference
10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China
Funder
The Kamprad Family Foundation, 6810
Note

Ej belagd 181211

Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2018-12-11Bibliographically approved
Pardalis, G., Mainali, B. & Mahapatra, K. (2018). One-stop-shop as an innovation, and construction SMEs: a Swedish perspective. In: 10th International Conference on Applied Energy (ICAE2018), Hong Kong, China, August 22-25, 2018: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), Hong Kong, China, August 22-25, 2018.
Open this publication in new window or tab >>One-stop-shop as an innovation, and construction SMEs: a Swedish perspective
2018 (English)In: 10th International Conference on Applied Energy (ICAE2018), Hong Kong, China, August 22-25, 2018, 2018Conference paper, Published paper (Refereed)
Abstract [en]

This paper examines the views of construction SMEs in Sweden regarding innovations, in particular the one-stop-shop business concept,and its adoption for renovation of detached house. The investigation is based on interviews with 10 construction SMEs and by applying aconceptual framework for organizational innovation adoption. The results suggest that, even though the one-stop-shop businessconcept is perceived as a means for growth, at present, construction SMEs in Sweden are unlikely to adopt it at present. This lackof interest is mostly related to the perceived complexity of this model and the underlying risks and uncertainties. That complexity isseen as a preventing factor as it puts at stake their current business. The interviewees proposed that there should be an entrepreneur to coordinate the actors involved in the renovation process, whose role can be further studied.

Series
Energy Procedia, ISSN 1876-6102
Keywords
innovation adoption, one-stop-shop, construction SMEs, adopter characteristics, perceptions
National Category
Construction Management
Research subject
Environmental Science, Environmental technology
Identifiers
urn:nbn:se:lnu:diva-78474 (URN)
Conference
10th International Conference on Applied Energy (ICAE2018), Hong Kong, China, August 22-25, 2018
Funder
The Kamprad Family Foundation, 6810EU, Horizon 2020, 6811
Available from: 2018-10-25 Created: 2018-10-25 Last updated: 2019-01-17
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.

Place, publisher, year, edition, pages
Taylor & Francis, 2017
Keywords
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)000402126900006 ()
Projects
ProWOOD
Available from: 2017-04-26 Created: 2017-04-26 Last updated: 2018-11-28Bibliographically 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.

Place, publisher, year, edition, pages
Emerald Group Publishing Limited, 2017
Keywords
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)000413358000008 ()
Available from: 2017-04-25 Created: 2017-04-25 Last updated: 2018-04-04Bibliographically approved
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
Keywords
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)000431480900032 ()
Conference
International Conference on Architecture and Built Environment. October 5–6, 2016, Kuala Lampur, Malaysia
Projects
ProWOOD
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2018-12-14Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4405-1056

Search in DiVA

Show all publications