Ricardo Bernardo

The building sector is a major contributor to greenhouse gases, consuming significant energy and available resources. Energy renovation of buildings is an effective strategy for decarbonisation, as it lowers operational energy and avoids the embodied impact of new constructions. To be successful, the energy renovation process requires meaningful building models. However, the time and costs associated with obtaining accurate data on existing buildings make large-scale evaluations unrealistic. This study proposes a methodology to streamline building energy models from open-access datasets for urban scalability. The methodology was tested on six case study buildings representing different typologies of the Swedish post-war construction period. The most promising results were obtained by coupling OpenStreetMap-sourced footprints with energy performance declarations and segmented archetypes for building characterisation. These significantly reduced simulation time while retaining similar accuracy. The suggested methodology streamlines building energy modelling with a promising degree of automation and without the need for input from the user. The study concludes that municipalities and building owners could use a such methodology to develop roadmaps for cities to achieve carbon neutrality and evaluate energy renovation solutions. Future work includes achieving higher accuracy of the generated energy models through calibration, performing renovation analysis, and upscaling from individual buildings to neighbourhoods.

Sweden has set ambitious goals concerning future sustainable cities. Solar energy plays a vital role in this transformation, since it directly relates to our health and well-being, on-site renewable energy production, economic activity, and social interaction. Therefore, prioritizing solar access already in the urban design phase is important to create equal possibilities for everyone living and working in cities and communities. There is little known about how solar access is prioritized and assessed in the current urban planning process in Sweden. Therefore, two workshops were conducted with urban planners working at Swedish municipalities to establish a baseline, gaps and needs. The results identified three themes: (1) the role of solar access in the urban planning process, (2) suitable solar access metrics and threshold values, and (3) tools. A proper definition of solar access is missing, and only daylight indoors is regulated in the later stage. Therefore, the urban planners rank solar access as following: (1) daylight indoors, (2) day- and sunlight outdoors, and (3) active solar energy production. The participating municipalities had different routines concerning daylight but there were no established routines for solar access for outdoor spaces or active solar energy production. There was a need for better access to tools that can (1) provide quick feedback to iterate several design alternatives, (2) flag for ‘critical points’ in the zoning plan for solar access, (3) take other parameters into account, e.g. microclimate, and (4) visualize the performance of neighbourhoods for solar energy to other actors. Graphical Abstract

Purpose: The purpose of this paper is to identify appropriate concepts of multi-active façades for the renovation of multifamily buildings in Sweden and to determine which, if any, are financially viable. Design/methodology/approach: A lifecycle profit (LCP) analysis was used to examine financial viability through a ten-step process, which included identifying concepts, assessing costs and prices, calculating the LCP and performing sensitivity analysis. Two existing buildings – one low rise and the other high rise – were used as reference models. Findings: The findings were contradictory. Implementing any of the multi-active façade concepts on the high-rise building would be financially beneficial. The opposite was, however, the case for the low-rise building. Two factors causing this contradiction have been identified: the façade material before renovation and the size of the building. Research limitations/implications: The study is limited to two case buildings situated in Sweden; however, similar buildings represent a significant amount of the existing building stock. Part of the purpose of the study is also to investigate the merits of LCP analysis to evaluate energy-efficient retrofitting. The study implicates the benefits and pitfalls of LCP analysis needed to be considered by researchers and practitioners alike. Originality/value: The research findings contribute to the understanding of energy-efficient retrofitting of existing multifamily buildings based on prefabricated multi-active façade concepts.

Purpose: In this paper, we discuss the role of participatory research in integrated agricultural technology development using the example of a solar fruit drying project in Mozambique. Design/methodology/approach: We engage in seven participatory exercises with groups of farmers from two farmers’ associations in Inharrime district in Mozambique to identify their needs for solar fruit drying that are crucial for solar dryer technology design. We focus in the analysis on three of these exercises including a daily schedule exercise, SWOT (Strengths Weaknesses Opportunities and Threats) analysis and technology requirement exercise. Findings: Participatory research takes a dual function for integrated agricultural technology development. First, it can help to identify the technology needs of farmers and second it can enable the exchange and creation of different sets of knowledge for agricultural technology development between multiple stakeholders. Practical implications: Participatory research provides a tool for joint knowledge exchange and creation, which allows the identified technology requirements to be translated into practical technology design. Theoretical implications: This paper extends the concept of integrated research to integrated agricultural technology development and shows how participatory research is a tool that enables transdisciplinarity, which presents the most desired form of integrated research. Originality: This research is highly relevant for researchers working in an interdisciplinary environment with agricultural technology development in cross-cultural contexts. From a meta-level perspective, it provides insights for joint and integrated technology development.

Many agricultural technology interventions that aim to improve farmers’ livelihoods focus on households as the unit of analysis and ignore gender roles that entail different benefits and costs for different household members. Agricultural projects have shown limited success where gender roles and relations were ignored and thus more gender sensitive research is needed in agricultural technology development to ensure social acceptance. In this study, we address this need by investigating the importance of gender roles and relations in the case of solar fruit drying in Mozambique. We apply a variety of gender sensitive participatory methods that enable farmers to actively take part in the technology development process. First results indicate that the costs and benefits of solar fruit drying are not shared equally between genders. Women have much less time available for using the solar fruit dryer. The data also indicate that certain steps in the solar fruit drying process are clearly gender divided. We finally discuss potential mechanisms that can be applied in agricultural technology projects that can create awareness of the risk to reproduce traditional gender roles and unequal relations in the development process of new agricultural technologies.