Change search
Refine search result
1 - 24 of 24
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Anund Vogel, Jonas
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Blomkvist, Pär
    KTH, School of Industrial Engineering and Management (ITM), Industrial Economics and Management (Dept.), Sustainability and Industrial Dynamics.
    Problem areas related to energy efficiency implementation in Swedish multifaily buildings2015In: Energy Efficiency, ISSN 1570-646X, E-ISSN 1570-6478Article in journal (Refereed)
    Abstract [en]

    This paper investigates problem areas related to energy efficiency implementation in Swedish multifamily buildings. The paper first presents a generic list of (theoretical) problem areas identified through a literature survey. Using a qualitative approach, the paper also investigates if the problem areas identified in the literature also have an impact on the Swedish building sector. Results from the interview study reveal a strong coherence between problem areas in the literature and those expressed by the interviewees. However, this paper identifies seven novel challenges that cannot be derived from the list of barriers in the literature. Moreover, results reveal that as many as 12 problem areas have their origin in national factors such as agreement structures, incentive schemes, and cost calculation methods.

  • 2.
    Arias Hurtado, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Whole Supermarket System Modelling2015In: Sustainable Retail Refrigeration, Wiley Blackwell , 2015, p. 263-290Chapter in book (Other academic)
    Abstract [en]

    The supermarket sector has more or less used the trial and error approach to implement and evaluate new ideas and concepts for decreasing energy usage and minimizing refrigerant charge. To estimate the energy requirement in a supermarket, it is necessary to evaluate the interrelatedness between the different subsystems and their energy demands. The main subsystems included in computer simulation models for energy use in supermarkets are the building envelope, outdoor climate, HVAC system, refrigeration system and retail display cabinets. The chapter also analyzes four different whole-building simulation models for supermarkets: EnergyPlus developed by the US Department of Energy; CyberMart developed by the Royal Institute of Technology in Sweden; RETScreen developed by Natural Resources Canada; and SuperSim developed by Brunel University in the UK. The implementation of new energy-saving technologies in supermarkets requires an extensive analysis of energy performance of refrigeration systems, HVAC systems, lighting, appliances, and of total energy consumption. 

  • 3.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    Energy Usage in Supermarkets - Modelling and Field Measurements2005Doctoral thesis, monograph (Other scientific)
    Abstract [en]

    This thesis investigates a special type of energy system, namely energy use in supermarkets through modelling, simulations and field studies. A user-friendly computer program, CyberMart, which calculates the total energy performance of a supermarket, is presented. The modelling method described in this thesis has four phases: the first phase is the de-velopment of a conceptual model that includes its objectives, the envi-ronment and the components of the system, and their interconnections. The second phase is a quantitative model in which the ideas from the conceptual model are transformed into mathematical and physical rela-tionships. The third phase is an evaluation of the model with a sensitivity analysis of its predictions and comparisons between the computer model and results from field measurements. The fourth phase is the model ap-plication in which the computer model answers questions identified in the beginning of the modelling process as well as other questions arising throughout the work.

    Field measurements in seven different supermarkets in Sweden were car-ried out to: (i) investigate the most important parameters that influence energy performance in supermarkets, (ii) analyse the operation of new system designs with indirect system implementation in Sweden during recent years, and (iii) validate the computer model.

    A thorough sensitivity analysis shows a total sensitivity of 5.6 %, which is a satisfactory result given a 10% change in the majority of input parame-ters and assumptions, with the exception of outdoor temperatures and solar radiation that were calculated as extreme values in METEO-NORM. Comparisons between measurements and simulations in five supermarkets also show a good agreement. Measurements and simula-tion results for a whole year were not possible due to lack of data.

    CyberMart opens up perspectives for designers and engineers in the field by providing innovative opportunities for assessment and testing of new energy efficient measures but also for evaluation of different already-installed system designs and components. The implementation of new energy-saving technologies in supermarkets requires an extensive inte-grated analysis of the energy performances of the refrigeration system, HVAC system, lighting, equipment, and the total energy usage. This analysis should be done over a long period, to evaluate and compare the real energy performance with the theoretical values calculated by Cyber-Mart.

  • 4.
    Arias, Jaime
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Claesson, Joachim
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration. KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Sustainable Building Systems.
    Effektivare butikskyla: Värme ur kylanläggningar samt system med flytande kondensering, Aktiviteter 20062007Report (Other academic)
  • 5.
    Arias, Jaime
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Choisir entre récupération de chaleur ou pression de condesation flottante en froid commercial2006In: Revue J. du Froid, no 1066, p. 47-54Article in journal (Refereed)
  • 6.
    Arias, Jaime
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Heat Recovery and Floating Condensing in Recent Refrigeration Systems in Supermarkets2005Conference paper (Refereed)
  • 7.
    Arias, Jaime
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Modelling Supermarket Energy Usage2005Conference paper (Refereed)
  • 8.
    Arias, Jaime
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, PerKTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.Sawalha, SamerKTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Annex 31: advanced modelling and tools for analysis of energy use in supermarket systems2010Conference proceedings (editor) (Refereed)
  • 9.
    Arias, Jaime M.
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per G.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Heat recovery and floating condensing in supermarkets2006In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 38, no 2, p. 73-81Article in journal (Refereed)
    Abstract [en]

    Supermarkets are great energy users in many countries. The potential for increased energy efficiency is large. One option is to utilize heat recovery (or heat reclaim) from condensers to heat the premises. Obviously this option is only interesting in relatively cold areas such as northern Europe, Canada, etc. An alternative to heat recovery is floating condensing pressure, which improves the coefficient of performance and decreases the energy consumption of the refrigeration system at lower outdoor temperature. Both heat recovery and floating condensing pressure can be utilized interchangeably depending on the heat requirements of the premises. A computer model that calculates the energy consumption in a supermarket with the possibility to simulate different system solutions for the refrigeration system has been developed at the Royal Institute of Technology, Department of Energy Technology. The software CyberMart is used in the present study to compare the potential of heat recovery and floating condensing in Swedish supermarkets. Measurements of different parameters such as temperatures, relative humidity and compressor power have been carried out in different supermarkets with heat recovery to validate the theoretical calculations. The present study shows that heating requirements can be covered completely by heat reclaim from the condenser. However, practical experiences show that installations are less efficient due to poor system solutions and/or control strategies. According to the results from CyberMart, the highest potential of energy saving is obtained from using a systems solution with both heat recovery and floating condensing.

  • 10.
    Arias, Jaime M.
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per G.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Modelling and experimental validation of advanced refrigeration systems in supermarkets2005In: Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, ISSN 0954-4089, E-ISSN 2041-3009, Vol. 219, no E2, p. 149-156Article in journal (Refereed)
    Abstract [en]

    The effective use of energy and the replacement of CFC and HCFC refrigerants are two factors that have influenced the design and operation of refrigeration systems in supermarkets during recent years. The potential for increasing energy efficiency in refrigeration systems, indoor climate and refrigerated cabinets is large. Since the energy systems of a supermarket are relatively complex, improvements in one subsystem affect other systems, thus making analysis of potential improvements non-additive. A computer model, CyberMart, that predicts building heating and cooling loads, HVAC (heating, ventilation, and air conditioning), and refrigeration system performances of a supermarket, has been developed. The focus of the model is on energy use, environmental impact (TEWI), and life cycle cost (LCC) of the refngeration system. The refrigeration system solutions included in the model are: direct system, completely indirect system, partially indirect system, cascade system, parallel system with mechanical sub-cooling (where the refrigerant in the low-temperature system is sub-cooled with the brine of the intermediate temperature level), and district cooling (that cools the condenser of the refrigeration machines). Measurements of different parameters such as outdoor and indoor temperatures, relative humidity, and compressor power have been carried out in several stores to validate the model. A theoretical description of the model and results from the model and measurements are presented in this paper.

  • 11.
    Claesson, Joachim
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration. KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Sustainable Building Systems.
    Antin, Karina
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration. KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Sustainable Building Systems.
    Wallin, Jörgen
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Sustainable Building Systems.
    Utvärdering av värmepumpar som attraktivt del i åtgärder i 50-, 60-, 70-tals inklusive även miljonprogrammet sett ur ett tekno-ekonomiskt perspektiv2010Report (Other academic)
  • 12. Hägg, Cecilia
    et al.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    A Comparison Between Single-Phase and Ice Slurry as Secondary Fluid in Supermarket2005Conference paper (Refereed)
  • 13.
    Hägg, Cecilia
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Comparaison entre fluide secondaire monophasique et coulis de glace en supermarché2007In: Revue générale du froid, ISSN 0035-3205, Vol. 97, no 1073, p. 47-54Article in journal (Refereed)
    Abstract [fr]

    Le coulis de glace est considéré comme une solution novatrice en tant que frigoporteur diphasique. Cet article évalue si la solution coulis de glace est compétitive vis-à-vis des fluides secondaires monophasiques dans les applications en supermarché en froid positif, avec les deux options habituelles : récupération de chaleur et haute pression flottante. Etant donné que le coulis de glace permet une accumulation efficace, les besoins de production de froid en période de pointe peuvent être déplacés. La comparaison est faite entre 24 heures de temps de fonctionnement habituel et 8 heures assurées pendant la période nocturne. Les temps de fonctionnement différents nécessitent des volumes de stockage différents. Les systèmes ont été comparés, en faisant varier pendant un an les conditions de fonctionnement heure par heure, en utilisant un programme de simulation appelé CyberMart. Ce programme est destiné à simuler les systèmes frigorifiques et énergétiques en supermarché. Il a été développé par la division thermodynamique et réfrigération appliquée de l'Institut royal de technologie de Stockholm (KTH). La simulation a été effectuée sur la base d'un magasin alimentaire virtuel de 2 700 m2d'une puissance frigorifique de 90 kW à Karlstad, en Suède. En comparant les consommations énergétiques, l'étude montre que le coulis de glace est favorable dans tous les cas.

  • 14.
    Karampour, Mazyar
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Sawalha, Samer
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Abdi, Amir
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Rogstam, Jörgen
    Review of supermarket refrigeration and heat recovery research at KTH-Sweden2015In: 6th IIR Conference: Ammonia and CO2 Refrigeration Technologies, Ohrid, Macedonia: International Institute of Refrigeration, 2015Conference paper (Refereed)
    Abstract [en]

    This paper reviews findings of main projects at the Royal Institute of Technology (KTH), Sweden on supermarket refrigeration and heat recovery systems. A main focus of the research has been on CO2 trans-critical booster system, as the emerging solution in the Swedish market, where its performance has been often compared with the conventional HFC solutions.The field measurements project investigates several supermarket installations with CO2 and conventional HFC systems, where detailed performance comparisons have been performed.In addition to the standard methods for field data analysis of refrigeration systems, a simplified method has been proposed to monitor the real-time performance of the refrigeration systems in a supermarket. Proper control strategy for heat recovery has also been investigated by computer modeling and field measurement analysis.Another major study has been examining the improvement of energy efficiency using short- and long-term thermal storage in supermarkets. Daily and yearly storage solutions have been proposed and studied in this project.Focusing on improvement in energy efficiency in supermarkets, state-of-the-art refrigeration systems have been defined for further investigations and an existing supermarket modeling software developed at KTH (CyberMart) is being upgraded to investigate the recent solutions in the market.

  • 15.
    Karampour, Mazyar
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Sawalha, Samer
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Eco-friendly Supermarkets: an Overview2016Report (Refereed)
  • 16.
    Kliatsko, Aleh
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    A Systematic approach to modelling of energy usage by Human Activity System (HAS) and Energy Usage Systems (EUS)2011Conference paper (Refereed)
    Abstract [en]

    The main goal of the paper is to introduce a chosen modelling approach and provide a discussion on this. The article describes modelling of energy use as a consequence of human activities in cities and especially situation where the opportunities for change are significant. We call these Situations of Opportunities (SitOpp). The paper describes a modelling approach aiming at tools to explore these situations further. The methodology is based on the concept of Human Activity Systems (HAS - What people do) and Energy Usage Systems (EUS - the system that supports these activities by aid of energy). The modelling process consists of several steps: conceptual, qualitative and finally quantitative models are built for each SitOpp. The modelling process is supported by the construction of so-called Causal Loop Diagram (CLD) to facilitate multi-stakeholder and cross-disciplinary modelling.

     

    This study presents schematically a process to create conceptual as well as qualitative models, and the modelling process, aiming to quantitatively determine the need for primary energy in three city parts of Stockholm.  The SitOpps are chosen as part of a transformation process to a normative future goal towards the so-called 2000W society (2kW is equivalent to an energy usage of 17 500 kWh per person and year). The CO2 emissions should also be reduced from today’s levels to 1ton/y and person.

     

    One of the main tasks of this project is to develop a methodology to systematically model HAS and EUS, going from the conceptual over the qualitative to the quantitative mode. The project uses the STELLA software program to build the quantitative models. One important aspects of the project is the understanding of the change agents (actors) and the change process. The modelling process is supporting parallel scenario building activities using back-casting techniques.

  • 17. Marimón, M. A.
    et al.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per G.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Bruno, J. C.
    Coronas, A.
    Integration of trigeneration in an indirect cascade refrigeration system in supermarkets2011In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 43, no 6, p. 1427-1434Article in journal (Refereed)
    Abstract [en]

    This article presents an energy and economic analysis of a trigeneration configuration for supermarket applications. The energy system in a supermarket is relatively complex, because it includes lighting, air conditioning, cabinets, refrigeration system, etc. A trigeneration system could be used to simultaneously satisfy heating, refrigeration and electricity demands in supermarkets. More specifically, this article studies the integration of a trigeneration system and an indirect refrigeration cascade compression system in a supermarket in Barcelona. The trigeneration system consists of a cogeneration engine and an ammonia/water absorption chiller unit. The results of simulating energy usage, life cycle costs and CO2 emissions have been compared with a conventional indirect refrigeration cascade compression system for the supermarket studied. Several trigeneration configurations have been studied. They all show a payback time of less than 6 years but the profitability of the investment depends strongly on the ratio between the prices of natural gas and electricity. This study shows that this novel trigeneration system is economically feasible and environmentally more viable than conventional supermarket systems.

  • 18.
    Sawalha, Samer
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias Hurtado, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Karampour, Mazyar
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Rogstam, Jörgen
    Abdi, Amir
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
    Forskning på KTH om livsmedelskyla-En översikt.2014Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    På avdelningen för Tillämpad Termodynamik och kylteknik, Institutionen för Energiteknik på KTH har vi arbetat med livsmedelskyla för butiker och stormarkander sedan mer än 15 år. Detta har skett inom ramen för olika projekt och med olika inriktning, innefattande datorsimuleringar, experimentella arbeten och fältmätningar. Vi har därigenom byggt upp en gedigen kompetens inom området och vi har också tillgång till värdefulla vetenskapliga verktyg för att belysa olika fundamentala frågeställningar inom området som på senare år undergått en mycket dynamisk utveckling.

  • 19.
    Sawalha, Samer
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Karampour, Mazyar
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Rogstam, Jörgen
    Abdi, Amir
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Forskning på KTH om livsmedelskyla: En översikt2014Other (Other (popular science, discussion, etc.))
  • 20.
    Shafqat, Omar
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Stoltz, David
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Participatory simulation for energy target identification in EcoCities2014Conference paper (Refereed)
    Abstract [en]

    Cities and Urban centers are hot beds for future innovation in the field of energy efficiency. At present, energy use in cities accounts for more than 60% of total world energy use and this trend is expected to increase with the growth in urbanization in various parts of the world. The role of Ecocities in this regard is of considerable importance. This paper discusses a model that was developed to assist the target setting in the planning process of an Ecocity in China. The Ecocity located in the Wuxi region in China, is currently in its planning stage. The model has been developed with a systems thinking approach, using STELLA. Different sectors comprising the Ecocity i.e. built environment, transport, water and waste management and energy generation have been considered. An effort has been made to take into account various possible synergies and feedbacks in the system that can be utilized to improve the performance of the overall system. An interactive interface has been provided to help different stakeholders in the decision making process. A participatory approach was adopted in the development of the model where different key parameters were identified as a result of a collaborative exercise with the various stakeholders. A framework for Participatory Modeling and Simulation has been developed. The model gives a possibility to visualize the energy saving potential for different technologies being proposed for implementation in the eco-city. Different scenarios have been created in conjunction with the identified sectors to reflect various levels of ambition towards energy saving in the eco-city.

  • 21.
    Stoltz, David
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arrias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Categorization framework for systems innovation in EcoCities2015In: CLEAN, EFFICIENT AND AFFORDABLE ENERGY FOR A SUSTAINABLE FUTURE, 2015, p. 2466-2471Conference paper (Refereed)
    Abstract [en]

    With an increasing concern regarding climate change and the increasingly higher rate of urbanization worldwide, cities are expected to play a more important role in the future global energy system. Therefore, sustainable urban development projects, so-called EcoCities projects, are carried out globally. EcoCities are normally focusing on minimizing energy use and greenhouse gas emissions as well as to serve as platforms for innovation fostering. One good example is Royal Seaport in Stockholm, Sweden in which an Innovation Arena has been established by the utilization of the Triple Helix innovation model where academia, industry and the city are cooperating. Due to the fact that EcoCity projects often are focusing on Innovation creation, this study defines a multi-level perspective framework for systems innovation in such projects. Based on previous studies on systems innovation from a multi-level perspective, the framework explains the occurrence of EcoCity projects as a reaction to the change in climate and urbanization as well as how EcoCities are acting as innovation platforms by simplifying the integration of emerging technologies in the city system. This paper also presents a hypothesis that EcoCity projects enable a shortened time for vision and ideas to transform into inventions and furthermore into innovations by reaching acceptance. (C) 2015 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

  • 22.
    Stoltz, David
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Shafqat, Omar
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    On holistic planning in ecocity development: Today and in the past2014In: Energy Procedia: International Conference on Applied Energy, ICAE2014, Elsevier, 2014, Vol. 61, p. 2192-2195Conference paper (Refereed)
    Abstract [en]

    Cities are expected to play an increasingly important role in the future global energy system due to the rapid rate of urbanization. As a reaction to this, the concept of ecological cities, or EcoCities, has gained a foothold in the world and there are numerous commenced EcoCity projects worldwide. As an example, it is said that there are over 250 EcoCity projects in China alone. However, there is no definitive definition of what an EcoCity is per se and thus it is relevant to ask what lies behind the "eco" in these projects. EcoCity planning is generally recommended to be carried out through a holistic planning approach by incorporating a wide range of focus areas in the project. The holistic planning is often claimed to be the key to successful EcoCity projects. Therefore, this article has identified 10 focus areas and used these to evaluate EcoCity projects by analyzing how many of these focus areas that have been taken in consideration in the projects. The higher number of focus areas in consideration, the higher score and thus the higher level of ambition, i.e. The city is planned in a more holistic manner. The projects have also been analyzed by identifying the year of start and geographical location in order to compare whether the level of ambition is varying between different parts of the world and during different time periods and by that identify whether EcoCity projects are planned with a more holistic approach now than earlier.

  • 23. Van Der Sluis, S.
    et al.
    Lindberg, U.
    Lane, A. -L
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Performance indicators for energy efficient supermarket buildings2015In: Refrigeration Science and Technology, International Institute of Refrigeration, 2015, p. 2773-2780Conference paper (Refereed)
    Abstract [en]

    Performance indicators are needed to transform available measurement data into knowledge on the energy efficiency of a supermarket building. Such indicators are e.g. the supermarket size, the opening hours, the outdoor climate and applied energy saving options. When the energy use is related in to the supermarket size, opening hours, and other performance indicators, it should be possible to appreciate the energy use of the supermarket: is it relatively high, normal, or relatively efficient. IEA HPC Annex 44 "performance indicators for energy efficient supermarket buildings" searches for performance indicators that will allow to evaluate energy efficiency of existing single supermarkets, supermarkets within one chain, supermarkets across different chains and even supermarkets in different regions or countries. Based on new data from the Netherlands, this paper investigates the relation between sales area, opening hours and yearly energy consumption, and discusses other aspects that are needed to understand observed data.

  • 24.
    Vogel, Jonas Anund
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Lundqvist, Per
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Arias, Jaime
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Categorizing barriers to energy efficiency in buildings2015In: CLEAN, EFFICIENT AND AFFORDABLE ENERGY FOR A SUSTAINABLE FUTURE, 2015, p. 2839-2845Conference paper (Refereed)
    Abstract [en]

    Introducing new technologies in buildings in Sweden have historically been connected with great portions of scepticism, hence influencing the speed of acceptance of new technologies. The speed is slow even though technologies are tested, evaluated, proven to make an impact, and economic efficient. In order to understand acceptance of energy efficient technologies in multifamily buildings and to identify the origin of barriers to energy efficiency this paper investigates barriers as consequences of the current system structure in the Swedish building sector. The study views the Swedish building sector as a sociotechnical system built from technical artefacts, institutions, and actors, thus often deeply embedded in our societies. The Swedish building sector is well structured, resulting in that innovation and development occurring outside of the existing sociotechnical regime might not be recognized as feasible investments. In order to identify the structures enabling barriers to energy efficiency adoption this paper aims at developing a framework for categorizing barriers depending on their structural origin. The categorization framework is inspired by theories of sustainable innovation journeys and of soft systems and distinguishes between three decision-levels for barriers to energy efficiency: Project level, Sector level and Contextual level. By implementing the proposed categorization framework it becomes obvious that problem areas in the building sector are not connected to any specific structural level. However, results in this study reveal that most barriers originate in the Contextual level, which implies that energy and sustainability are not yet key aspects when forming and transforming contextual preconditions on how to design and build multifamily buildings in Sweden. (C) 2015 The Authors. Published by Elsevier Ltd.

1 - 24 of 24
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf