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Dr. Joana Ortiz
Catalonia Institute for Energy Research (IREC)

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Research Keywords & Expertise

0 Housing and Health
0 Energy effciency
0 Energy flexible buildings
0 Building energy refurbishment
0 Positive energy buildings and districts

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Journal article
Published: 27 August 2021 in Sustainability
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The present work aims to describe and analyze the results of the interventions carried out in the Barcelona pilot site of the EmpowerMed project. The overall objective of EmpowerMed is to tackle energy poverty and to help improve the health of people in coastal areas of Mediterranean countries, with a particular focus on women. The main support approach implemented in Barcelona is Collective Advisory Assemblies (CAA), in the framework of Alliance against Energy Poverty. CAA is an innovative, collaborative empowering engagement tool that offers an alternative to the more traditional one-off individual household advice and support approaches. CAAs take place together with a monitoring campaign where: electricity consumption is analyzed to optimize the supply contracts, and indoor environmental comfort to provide recommendations for wellbeing improvement. Through the different approaches, a characterization of the people that have participated in the Barcelona pilot site was completed, from a socioeconomic, energy, thermal comfort and air quality perspective. Additionally, it was compared with a group of energy poverty non-affected households, which are involved in the monitoring campaign. Finally, the impact was quantified in terms of empowerment of energy poverty population and, potential economic savings.

ACS Style

Joana Ortiz; Mariana Jiménez Martínez; Alba Alegría-Sala; Sergio Tirado-Herrero; Irene González Pijuan; Mònica Guiteras Blaya; Lluc Canals Casals. Tackling Energy Poverty through Collective Advisory Assemblies and Electricity and Comfort Monitoring Campaigns. Sustainability 2021, 13, 9671 .

AMA Style

Joana Ortiz, Mariana Jiménez Martínez, Alba Alegría-Sala, Sergio Tirado-Herrero, Irene González Pijuan, Mònica Guiteras Blaya, Lluc Canals Casals. Tackling Energy Poverty through Collective Advisory Assemblies and Electricity and Comfort Monitoring Campaigns. Sustainability. 2021; 13 (17):9671.

Chicago/Turabian Style

Joana Ortiz; Mariana Jiménez Martínez; Alba Alegría-Sala; Sergio Tirado-Herrero; Irene González Pijuan; Mònica Guiteras Blaya; Lluc Canals Casals. 2021. "Tackling Energy Poverty through Collective Advisory Assemblies and Electricity and Comfort Monitoring Campaigns." Sustainability 13, no. 17: 9671.

Conference paper
Published: 29 March 2021 in E3S Web of Conferences
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The ISO 52000–1:2017 is the overarching Energy Performance of Buildings (EPB) standard, providing the general framework of the EPB assessment. It is applicable to the assessment of overall energy use of a building, by measurement or calculation, and the calculation of energy performance in terms of primary energy or other energy-related metrics. ISO 52000–1 provides general profound guidelines, but also gives the freedom to adapt the guidelines with national standards and regulations. This article focuses on design stage energy performance assessment in the framework of syn.ikia project, which aims to deliver a blueprint for an Integrated Design Process of sustainable plus energy buildings and neighbourhoods, leading the way to plus energy districts and cities. This project has four demonstration sites and the one being in focus of this article is located in Catalonia, Spain. Even though this project and Spanish Technical code both are based on ISO 52000–1, the criteria of calculation boundaries of those two vary in some degree, and that can cause great difference in the primary energy balance. In the calculation of the energy balance the criteria of syn.ikia considers all common energy uses in a building, including heating, cooling, ventilation, dehumidification, domestic hot water and lighting, while the Spanish Technical Code excludes lighting consumption. The main difference however is caused due to the fact that in syn.ikia hypothesis the exported energy is being considered in the calculation of how much non-renewable energy is avoided from the grid, while Spanish Technical Code excludes it. For the evaluation of these differences, a simplified monthly primary energy calculation tool is developed during the evaluation framework of key performance indicators of the project. The analysis of the calculation framework hypothesis is presented, analyzing the effects of the assessment boundaries, different primary energy balance calculation hypothesis and building design alternatives.

ACS Style

Meril Tamm; Joana Ortiz; Jordi Pascual; Jarek Kurnitski; Martin Thalfeldt; Jaume Salom. Primary Energy Balance driven Integrated Energy Design Process of Positive Energy Building. E3S Web of Conferences 2021, 246, 13001 .

AMA Style

Meril Tamm, Joana Ortiz, Jordi Pascual, Jarek Kurnitski, Martin Thalfeldt, Jaume Salom. Primary Energy Balance driven Integrated Energy Design Process of Positive Energy Building. E3S Web of Conferences. 2021; 246 ():13001.

Chicago/Turabian Style

Meril Tamm; Joana Ortiz; Jordi Pascual; Jarek Kurnitski; Martin Thalfeldt; Jaume Salom. 2021. "Primary Energy Balance driven Integrated Energy Design Process of Positive Energy Building." E3S Web of Conferences 246, no. : 13001.

Conference paper
Published: 01 September 2019 in 2019 16th International Conference on the European Energy Market (EEM)
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ACS Style

Lluc Canals Casals; Cristina Corchero; Joana Ortiz; Jaume Salom; David Cardoner; Lucia Igualada; Rafael E. Carrillo; Yves Stauffer. How Building and District Algorithms Enhance Renewable Energy Integration in Energy Markets. 2019 16th International Conference on the European Energy Market (EEM) 2019, 1 .

AMA Style

Lluc Canals Casals, Cristina Corchero, Joana Ortiz, Jaume Salom, David Cardoner, Lucia Igualada, Rafael E. Carrillo, Yves Stauffer. How Building and District Algorithms Enhance Renewable Energy Integration in Energy Markets. 2019 16th International Conference on the European Energy Market (EEM). 2019; ():1.

Chicago/Turabian Style

Lluc Canals Casals; Cristina Corchero; Joana Ortiz; Jaume Salom; David Cardoner; Lucia Igualada; Rafael E. Carrillo; Yves Stauffer. 2019. "How Building and District Algorithms Enhance Renewable Energy Integration in Energy Markets." 2019 16th International Conference on the European Energy Market (EEM) , no. : 1.

Conference paper
Published: 13 August 2019 in E3S Web of Conferences
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The aim of the present work is to evaluate the environmental comfort of the users of a new nZEB sport hall located in Tarragona, Spain, through a Post Occupancy Evaluation. The study is composed by two phases of measurements where the visual comfort, the thermal comfort and the air quality are evaluated. The first monitoring campaign is focused on a detailed visual comfort evaluation under daylight conditions, done on July 28th, 2017. The second monitoring campaign is focused on the thermal comfort and the air quality and was performed during the Mediterranean Olympic Games from June 19th to July 1st of 2018. Moreover, around 140 of surveys are done to the audience to compare the calculated comfort parameters with the perception of the users. The results of the Post Occupancy Evaluation are satisfactory, obtaining good comfort indexes and demonstrating a good perception by the users.

ACS Style

Joana Ortiz; Maria L. Gonzalez Matterson; Paolo Taddeo; Jaume Salom. Post-Occupancy Evaluation of Indoor Environmental Quality in a nZEB sport hall in a Mediterranean climate. E3S Web of Conferences 2019, 111, 1 .

AMA Style

Joana Ortiz, Maria L. Gonzalez Matterson, Paolo Taddeo, Jaume Salom. Post-Occupancy Evaluation of Indoor Environmental Quality in a nZEB sport hall in a Mediterranean climate. E3S Web of Conferences. 2019; 111 ():1.

Chicago/Turabian Style

Joana Ortiz; Maria L. Gonzalez Matterson; Paolo Taddeo; Jaume Salom. 2019. "Post-Occupancy Evaluation of Indoor Environmental Quality in a nZEB sport hall in a Mediterranean climate." E3S Web of Conferences 111, no. : 1.

Journal article
Published: 01 September 2017 in Energy Procedia
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ACS Style

Thibault Q. Péan; Jaume Salom; Joana Ortiz. Potential and optimization of a price-based control strategy for improving energy flexibility in Mediterranean buildings. Energy Procedia 2017, 122, 463 -468.

AMA Style

Thibault Q. Péan, Jaume Salom, Joana Ortiz. Potential and optimization of a price-based control strategy for improving energy flexibility in Mediterranean buildings. Energy Procedia. 2017; 122 ():463-468.

Chicago/Turabian Style

Thibault Q. Péan; Jaume Salom; Joana Ortiz. 2017. "Potential and optimization of a price-based control strategy for improving energy flexibility in Mediterranean buildings." Energy Procedia 122, no. : 463-468.

Original articles
Published: 10 May 2017 in Journal of Building Performance Simulation
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This article proposes a methodology to assess building behaviour, whilst taking its life cycle into account. Understanding of the system can be obtained by combining well-known energy consumption calculation engines (TRNSYS) with co-simulation processes defined using Specification and Description Language (SDL). In this instance, to find the best comfort, energy and cost scenarios for energy rehabilitation, Co-simulation is conducted in two phases: the best scenes of passive systems are found, those presented as a priority; and, the active systems are made with ‘brute force analysis’. The article provides the results for a case study: a single-family home built between 1991 and 2007 and located in Mediterranean climate zone. The methodology provides a set of passive energy efficiency measures, to improve until two scales in the building energy labelling system. Using the methodology and the proposed model has enabled us to dramatically reduce the run time until 75% and therefore.

ACS Style

Antoni Fonseca I Casas; Joana Ortiz; Núria Garrido; Pau Fonseca; Jaume Salom. Simulation model to find the best comfort, energy and cost scenarios for building refurbishment. Journal of Building Performance Simulation 2017, 11, 205 -222.

AMA Style

Antoni Fonseca I Casas, Joana Ortiz, Núria Garrido, Pau Fonseca, Jaume Salom. Simulation model to find the best comfort, energy and cost scenarios for building refurbishment. Journal of Building Performance Simulation. 2017; 11 (2):205-222.

Chicago/Turabian Style

Antoni Fonseca I Casas; Joana Ortiz; Núria Garrido; Pau Fonseca; Jaume Salom. 2017. "Simulation model to find the best comfort, energy and cost scenarios for building refurbishment." Journal of Building Performance Simulation 11, no. 2: 205-222.

Journal article
Published: 09 May 2017 in Buildings
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In this study, simulation work has been carried out to investigate the impact of a demand-side management control strategy in a residential nZEB. A refurbished apartment within a multi-family dwelling representative of Mediterranean building habits was chosen as a study case and modelled within a simulation framework. A flexibility strategy based on set-point modulation depending on the energy price was applied to the building. The impact of the control strategy on thermal comfort was studied in detail with several methods retrieved from the standards or other literature, differentiating the effects on day and night living zones. It revealed a slight decrease of comfort when implementing flexibility, although this was not prejudicial. In addition, the applied strategy caused a simultaneous increase of the electricity used for heating by up to 7% and a reduction of the corresponding energy costs by up to around 20%. The proposed control thereby constitutes a promising solution for shifting heating loads towards periods of lower prices and is able to provide benefits for both the user and the grid sides. Beyond that, the activation of energy flexibility in buildings (nZEB in the present case) will participate in a more successful integration of renewable energy sources (RES) in the energy mix.

ACS Style

Thibault Quentin Pean; Joana Ortiz; Jaume Salom. Impact of Demand-Side Management on Thermal Comfort and Energy Costs in a Residential nZEB. Buildings 2017, 7, 37 .

AMA Style

Thibault Quentin Pean, Joana Ortiz, Jaume Salom. Impact of Demand-Side Management on Thermal Comfort and Energy Costs in a Residential nZEB. Buildings. 2017; 7 (4):37.

Chicago/Turabian Style

Thibault Quentin Pean; Joana Ortiz; Jaume Salom. 2017. "Impact of Demand-Side Management on Thermal Comfort and Energy Costs in a Residential nZEB." Buildings 7, no. 4: 37.

Journal article
Published: 01 September 2016 in Energy and Buildings
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© 2016. This version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/This paper presents the results of a detailed method for developing cost-optimal studies for the energy refurbishment of residential buildings. The method takes part of an innovative approach: two-step evaluation considering thermal comfort, energy and economic criteria. The first step, the passive evaluation, was presented previously [1] and the results are used to develop the active evaluation, which is the focus of this paper. The active evaluation develops a cost-optimal analysis to compare a set of passive and active measures for the refurbishment of residential buildings. The cost-optimal methodology follows the European Directives and analysed the measures from the point of view of non-renewable primary energy consumption and the global costs over 30 years. The energy uses included in the study are heating, domestic hot water, cooling, lighting and appliances. In addition, the results have been represented following the energy labelling scale. The paper shows the results of a multi-family building built in the years 1990–2007 and located in Barcelona with two configurations: with natural ventilation and without natural ventilation. The method provides technical and economic information about the energy efficiency measures, with the objective to support the decision process.Postprint (author's final draft

ACS Style

Joana Ortiz; Antoni Fonseca i Casas; Jaume Salom; Nuria Garrido Soriano; Pau Fonseca i Casas. Cost-effective analysis for selecting energy efficiency measures for refurbishment of residential buildings in Catalonia. Energy and Buildings 2016, 128, 442 -457.

AMA Style

Joana Ortiz, Antoni Fonseca i Casas, Jaume Salom, Nuria Garrido Soriano, Pau Fonseca i Casas. Cost-effective analysis for selecting energy efficiency measures for refurbishment of residential buildings in Catalonia. Energy and Buildings. 2016; 128 ():442-457.

Chicago/Turabian Style

Joana Ortiz; Antoni Fonseca i Casas; Jaume Salom; Nuria Garrido Soriano; Pau Fonseca i Casas. 2016. "Cost-effective analysis for selecting energy efficiency measures for refurbishment of residential buildings in Catalonia." Energy and Buildings 128, no. : 442-457.

Journal article
Published: 01 January 2016 in Energy and Buildings
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This paper presents a detailed method to develop cost-optimal studies for the energy renovation of residential buildings. A realistic characterization of the building has been introduced, using measurement and survey data. The method allows improving the interaction between the occupancy and the building, and the characterization of the real state of the construction. In addition, the building simulation includes vernacular strategies of the Mediterranean architecture, as for example the natural ventilation and the use of solar protection. The method presented takes part of an innovative approach: two-step evaluation considering thermal comfort, energy and economic criteria. The passive evaluation is the focus of the paper and evaluates the passive measures from an economic and thermal comfort point of view. This method prioritizes the passive measures rather than the active ones, considering the thermal comfort of the users as a criterion of decision. The paper shows the results of a multi-family building built in the years 1990–2007 and located in two climates C2 and B3 (Barcelona and Tarragona). The method provides technical and economic information about a set of passive energy efficiency measures, with the objective to help to make decisions for choosing the appropriate combination of passive measures.

ACS Style

Joana Ortiz; Antoni Fonseca; Jaume Salom; Nuria Garrido; Pau Fonseca; Verdiana Russo. Comfort and economic criteria for selecting passive measures for the energy refurbishment of residential buildings in Catalonia. Energy and Buildings 2016, 110, 195 -210.

AMA Style

Joana Ortiz, Antoni Fonseca, Jaume Salom, Nuria Garrido, Pau Fonseca, Verdiana Russo. Comfort and economic criteria for selecting passive measures for the energy refurbishment of residential buildings in Catalonia. Energy and Buildings. 2016; 110 ():195-210.

Chicago/Turabian Style

Joana Ortiz; Antoni Fonseca; Jaume Salom; Nuria Garrido; Pau Fonseca; Verdiana Russo. 2016. "Comfort and economic criteria for selecting passive measures for the energy refurbishment of residential buildings in Catalonia." Energy and Buildings 110, no. : 195-210.

Research article
Published: 04 November 2015 in Mathematical Problems in Engineering
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The calculus of building energy consumption is a demanding task because multiple factors must be considered during experimentation. Additionally, the definition of the model and the experiments is complex because the problem is multidisciplinary. When we face complex models and experiments that require a considerable amount of computational resources, the application of solutions is imperative to reduce the amount of time needed to define the model and the experiments and to obtain the answers. In this paper, we first address the definition and the implementation of an environmental model that describes the behavior of a building from a sustainability point of view and enables the use of several simulations and calculus engines in a cosimulation scenario. Second, we define a distributed experimental framework that enables us to obtain results in an accurate amount of time. This methodology has been applied to the energy consumption calculation, but it can also be applied to other modeling problems that usually require a considerable amount of resources by reducing the amount of time needed to perform modeling, implementation, verification, and experimentation.

ACS Style

Pau Fonseca i Casas; Antoni Fonseca i Casas; Nuria Garrido-Soriano; Joana Ortiz; Josep Casanovas; Jaume Salom. Optimal Buildings’ Energy Consumption Calculus through a Distributed Experiment Execution. Mathematical Problems in Engineering 2015, 2015, 1 -12.

AMA Style

Pau Fonseca i Casas, Antoni Fonseca i Casas, Nuria Garrido-Soriano, Joana Ortiz, Josep Casanovas, Jaume Salom. Optimal Buildings’ Energy Consumption Calculus through a Distributed Experiment Execution. Mathematical Problems in Engineering. 2015; 2015 ():1-12.

Chicago/Turabian Style

Pau Fonseca i Casas; Antoni Fonseca i Casas; Nuria Garrido-Soriano; Joana Ortiz; Josep Casanovas; Jaume Salom. 2015. "Optimal Buildings’ Energy Consumption Calculus through a Distributed Experiment Execution." Mathematical Problems in Engineering 2015, no. : 1-12.

Journal article
Published: 01 September 2014 in Energy and Buildings
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A major issue in modelling the electrical load of residential building is reproducing the variability between dwellings due to the stochastic use of different electrical equipment. In that sense and with the objective to reproduce this variability, a stochastic model to obtain load profiles of household electricity is developed. The model is based on a probabilistic approach and is developed using data from the Mediterranean region of Spain. A detailed validation of the model has been done, analysing and comparing the results with Spanish and European data. The results of the validation show that the model is able to reproduce the most important features of the residential electrical consumption, especially the particularities of the Mediterranean countries. The final part of the paper is focused on the potential applications of the models, and some examples are proposed. The model is useful to simulate a cluster of buildings or individual households. The model allows obtaining synthetic profiles representing the most important characteristics of the mean dwelling, by means of a stochastic approach. The inputs of the proposed model are adapted to energy labelling information of the electric devices. An example case is presented considering a dwelling with high performance equipment.Peer ReviewedPostprint (author's final draft version

ACS Style

Joana Ortiz; Francesco Guarino; Jaume Salom; Cristina Corchero; Maurizio Cellura. Stochastic model for electrical loads in Mediterranean residential buildings: Validation and applications. Energy and Buildings 2014, 80, 23 -36.

AMA Style

Joana Ortiz, Francesco Guarino, Jaume Salom, Cristina Corchero, Maurizio Cellura. Stochastic model for electrical loads in Mediterranean residential buildings: Validation and applications. Energy and Buildings. 2014; 80 ():23-36.

Chicago/Turabian Style

Joana Ortiz; Francesco Guarino; Jaume Salom; Cristina Corchero; Maurizio Cellura. 2014. "Stochastic model for electrical loads in Mediterranean residential buildings: Validation and applications." Energy and Buildings 80, no. : 23-36.

Journal article
Published: 11 February 2013 in International Journal of Sustainable Energy
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The building sector is among the largest energy users while offering cost-effective means of reducing energy use. Dynamics of energy efficiency improvements in the building stock are very slow due to the long life span of buildings and barriers such as high investment cost. A list of general policy measures to overcome the barriers to energy efficiency improvements in the Mediterranean (MED) area was proposed by regional experts in the framework of the MARIE project. These measures could be considered as a first draft of the MED buildings energy efficiency strategy. This study assesses the potential impacts of such measures, so as to inform on their effectiveness. The MARIE measures result in larger energy savings than an equally ambitious strategy based on ‘conventional measures’. However, the benefits of MARIE arrive slowly and show large variations among regions depending on the characteristics of their current building stock.

ACS Style

Eduard Cubí; Joana Ortiz; Jaume Salom. Potential impact evaluation: an ex ante evaluation of the Mediterranean buildings energy efficiency strategy. International Journal of Sustainable Energy 2013, 33, 1000 -1016.

AMA Style

Eduard Cubí, Joana Ortiz, Jaume Salom. Potential impact evaluation: an ex ante evaluation of the Mediterranean buildings energy efficiency strategy. International Journal of Sustainable Energy. 2013; 33 (5):1000-1016.

Chicago/Turabian Style

Eduard Cubí; Joana Ortiz; Jaume Salom. 2013. "Potential impact evaluation: an ex ante evaluation of the Mediterranean buildings energy efficiency strategy." International Journal of Sustainable Energy 33, no. 5: 1000-1016.