Lessons Learnt from Substation Inspection on Low Temperature District Heating Networks

District heating networks are considered to be a key element for the decarbonization of Europe. The RELaTED project seeks to contribute to the decarbonization of these infrastructures with the demonstration of low temperature district heating networks. One of the demonstration sites consists of more than 50 substations within a subsection of a larger network in the city of Tartu (Estonia), where the temperature was lowered by 10 °C. To ensure the benefits of this new generation district heating network and the fulfillment of comfort requirements, data have been monitored and analyzed at the substation level in an automatic way to facilitate the inspection of every user.

Framework for Evaluating Financial Impacts of Technical Risks Related to Energy-Efficient Renovation of Commercial Office Buildings

Energy efficiency in the building sector is a priority of the EU Commission to achieve carbon neutrality by 2050. Renovation of the existing buildings, which are currently responsible for approximately 40% of EU energy consumption and 36% of the greenhouse gas emissions can lead to significant energy savings. This paper presents the EEnvest calculation method for evaluating the financial impacts of technical risks related to energy-efficient renovation of commercial office buildings. The evaluation method aims to increase investors’ confidence and boost investments in the renovation of the existing building. Through a series of Key Performance Indicators (KPI), the technical and financial risks impact is evaluated. The results are strictly connected to building features, climatic conditions, solution sets and mitigation measures specific to the building energy efficiency project.

ModSCO a Web Application Based on a Grey-Box Model to Support the Estimation of the Energy Savings in Building Retrofits

Energy Performance Contracting (EPC) can help the European Union (EU) in accelerating the cost-effective renovation of existing building stock. However, there are many risks and barriers that can inhibit the application of EPC. These barriers include uncertainty about building data, lack of quality assurance regarding the post-renovation energy performance, and process complexity. In order to cross these barriers, this paper presents ModSCO. ModSCO is a web application based on a Reduced Order grey-box Model (ROM) able to systematically quantify the energy savings achieved through Energy Conservation Measures (ECMs) utilising the schema of the International Performance Measurement and Verification Protocol (IPMVP). The benefits of utilising ModSCO in terms of accuracy and time savings are demonstrated with a comparison with a whole building energy model developed with IES-VE.

Smart Governance: An Investigation into Participatory Budgeting Models

Promoting public participation in urban processes has long been a key issue in discussions about urban governance. However, despite the advantages of more progressive and inclusive city governance, participatory budgeting (PB) often faces challenges to ensure collaboration between different city departments and involved residents. In some cases, residents are unsure about PB models’ transparency, other examples show the way NGOs use the model as a counterforce to central governance and thus local actors lack political and financial support. Moreover, uncertainty and restrictions imposed by the global pandemic in some way also impacted the realization of PB. This research aims to identify stakeholders in the participatory budgeting approach, describing opportunities and challenges of the organizational process and digital technologies as a means of enabling communication and collaboration between actors.

Simulating the Impact of Solar Energy on Pyramid and Stair Urban Blocks

Developing countries such as Iran are rapidly expanding, putting pressure on non-renewable energy resources. The building sector takes a major share of the total energy consumption of the country and is projected to increase further, resulting in the call for strategies to reduce energy use by improving the thermal performance of buildings. This study addresses the compelling need to provide optimum design guidelines for future apartment buildings in the city of Shiraz by investigating two urban cluster typologies, stair and pyramid, arranged in five orientations. The results showcase the ideal combination of 155° for the Pyramid typology, which contributes the least to the annual energy loads of the buildings.

4E Advancement of Heat Recovery during Hot Seasons for a Building Integrated Photovoltaic Thermal (BIPV/T) System

In conventional building integrated photovoltaic thermal (BIPV/T) systems, heat is only recovered during cold seasons. However, no recovery takes place in hot seasons. Therefore, this study comes up with an answer to the question “how much improvement in the amount of annual recovered heat (ANRH), average exergy efficiency (AAEE), and CO2 saving (ACDS), as well as payback period (PBP), is achieved when heat recovery is done in hot seasons?”. These are representatives of energy, exergy, environmental and economic (4E) aspects, respectively. The results show a 135.6%, 1.8% and 123.0% enhancement in the ANRH, AAEE and ACDS, respectively, while PBP decreases from 6.10 to 3.94 years.

BIM-SPEED Inhabitant’s App: A BIM-Based Application for Crowdsourcing of Inhabitants’ Input in Renovation Projects

This report summarizes the conceptual framework and the technical implementation of a BIM-based user-friendly application to gather inhabitant’s input in the context of renovation projects developed in the European funded project BIM-SPEED. It starts with the underlying objectives and the role of data acquisition in the project. Then, it explains and outlines the conceptual framework and the methodology used in relation to the identified use cases, where inhabitants’ input is required. Furthermore, it describes the implementation and the development of the proposed methods as a user-friendly app and, finally, it ends with ethical and privacy considerations, specifically the measures taken for safe handling of privacy-sensitive data.

Examining the Transition towards the Supply of Sustainable Apartments in Australia: A Design Perspective

The built environment in Australia accounts for about 25% of total greenhouse gas emissions (GHG), where only the multi-unit residential buildings account for a quarter of these emissions. Moving towards sustainable constructions and green buildings can help in reducing GHG emissions and their negative effects. In this context, integrating Circular Economy (CE) principles into buildings’ projects can further help in reducing the environmental impact of the building stock. The purpose of this research is to explore the embracing of CE in the apartment industry. Personal experiences and perspectives of 5 stakeholders from Vitoria and NSW involving sustainable new and retrofit apartment buildings are investigated by drawing on the results of the semi-structured interview. Results underlined barriers and opportunities for designing sustainable apartments.

Cost-Saving through Pre-Cooling: A Case Study of Sydney

Air conditioning is responsible for a considerable proportion of households’ electricity bills. During summer afternoons when households usually run their air conditioners, the retail time-of-use electricity tariffs are highest, and there is a peak demand in the electricity network. Pre-cooling is a method to shift air conditioning demand from peak hours to hours with lower demand and cheaper electricity tariffs. In this research, the pre-cooling potential of nine different types of residential housing in Sydney constructed with different star ratings and construction weights is evaluated. Star rating is the method to represent the annual heating and cooling requirements of buildings in Australia. Results highlight that pre-cooling produces cost saving for most of the days in 6-star and 8-star buildings. For 2-star buildings, pre-cooling sometimes leads to higher electricity costs. Moreover, pre-cooling improves thermal comfort, especially in 2-star light and medium weight buildings.

Energy Communities for Just Energy Transitions on a Local Scale: Initial Lessons from the Lightness Project

New energy communities that produce, store, trade and distribute renewable energy guided by innovative digital platforms are currently emerging in many EU member states. Expectations about these communities and their contribution to a ‘just engagement’ of citizens in energy transition are high. However, detailed monitoring of the degree to which these expectations have been realised thus far is often lacking. An innovative way to measure the just engagement of end-users as one of these expectations is based on criteria from environmental justice theories that have developed in recent years. This paper describes the initiation of seven pilot communities in five countries around a specific digital platform, and their assessment with a tailored environmental, justice-based framework. Based on the assessment—part of the ongoing Horizon 2020 project, ‘Lightness’—several challenges to just engagement are identified that are relevant for the project and beyond.