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The Middle Eastern terrain is expected to encounter unprecedented climatic conditions before the turn of the next century (circa. 80 years), emanating from extreme heat waves that exceed the critical threshold of habitable conditions. This threatens to cause a significant challenge that is exacerbated by a gap between the supply and demand of affordable energy. Therefore, the purpose of this study is to investigate the potential of utilising nearly zero-energy buildings (nZEB) to improve the performance of residential buildings in Iraq and the Middle East.

This study uses Iraq as a case-study because of the breadth of climatic conditions experienced across its wide-reaching territory and also because of the recent critical infrastructural challenges following the geo-political crisis. Three virtual buildings were simulated for Baghdad, Mosul and Basra cities to narrow the confines of the region to achieve nZEB under current and future climatic weather scenarios.

The findings showed that in all three cases studies, the buildings located within the three climatic regions in Iraq could achieve both significant annual energy reductions as well as nZEB standards which could range from 41 per cent to 87 per cent for current climatic conditions and 40 per cent to 84 per cent by 2080. An analysis has also been carried out for the three case-study cities which revealed significant operational-cost savings achievable through nZEB buildings.

There are currently limited studies that investigate such positive potential for nZEB strategies under the current and predicted future climatic scenarios in the Middle East.

The paper aims to reveal the most functioning project delivery systems for nearly zero-energy building (nZEB) projects. The focus is set to reveal the qualities of the systems that support the nZEB goals and sustainability.

Research method used in this paper is inductive reasoning. The reasoning is based on existing literature, and conclusions are drawn by combining pieces of that literature.

The state-of-the-art heating, ventilation and air conditioning (HVAC) and insulation requirements of nZEB technology and the lack of experience in the industry regarding nZEB projects suggest that modern collaboration-based project delivery systems should be favoured. The authors found that the most suitable project delivery system for a standard nZEB project is the integrated project delivery (IPD), which binds the financial goals of the main parties together via a reimbursement solution: target pricing. The authors also found the construction management (CM) at-risk system a suitable solution, especially if it is modified by adding the tools utilised in the IPD approach, thereby making it an IPD lite system.

The paper has value for the entire construction industry in Finland and European Union (EU). The owners and construction companies can use the findings in their development efforts towards nZEB construction. The EU 2020 nZEB degree makes all the findings concerning practicalities of nZEB projects valuable due to the lack of time and the lack of experience in the industry.

This article aims to reveal the benefits and opportunities that commissioning procedure has to offer for nearly zero-energy building (nZEB) projects. Another goal is to sculpture the commissioning process and, especially, commissioning consultant’s tasks to fit nZEB projects.

The idea was to incorporate the literature from two fields: commissioning and nZEB, and find out if commissioning would fit nZEB projects. Challenges offered by nZEB technology were pointed out and the solutions offered to these problems by commissioning were established. Expert interviews were used to test the findings.

Commissioning was found valuable for complex nZEB projects and even worthwhile investing to in simple nZEB projects. Quality assurance is a huge task when the change to nZEB construction happens in 2020 and commissioning can be a valuable tool to prevent large-scale quality problems. A number of additions were made to the example commissioning process used in Finland today.

This article gives evidence for economical usability of commissioning procedure in nZEB projects and reason to start investigating the possibility to attach commissioning as a mandatory procedure to all nZEB projects.

The purpose of this paper is to identify the risks and challenges related to the change in building construction projects to the European Union (EU) zero-energy building (nZEB) decree in the year 2020. Another goal was to create solutions to those risks and challenges.

A workshop method was chosen to gather up-to-date information from the construction cluster in Finland.

In the workshop, the main concern was the level of knowledge and know-how with all the parties working with construction projects. As an answer to this challenge, serious and substantial education in the organisations and competence requirements for designers and piloting as much as possible in the next few years was offered. Commissioning consultant was also seen as vital for nZEB project. Tight schedules and unfit project delivery systems were also seen as a risk for nZEB projects. However, modern project delivery systems were seen to be problematic in practice even if they were functional in theory.

The results of the workshop are valuable for all parties working with building construction projects in Finland and the whole EU area.

There is profound demand for higher skills and expertise in retrofitting the existing building stock of Europe. The delivery of low- or nearly zero-energy retrofits is highly dependent on technical expertise, adoption of new materials, methods of construction and innovative technologies. Future Irish national building regulations will adopt the Energy Performance of Buildings Directive vision of retrofitting existing buildings to higher energy efficiency standards. Construction industry stakeholders are key for the achievement of energy performance targets. Specifically, the purpose of this paper is to assess the attitudes, approaches and experiences of Irish construction professionals regarding energy efficient buildings, particularly nearly zero-energy buildings (nZEBs).

Data were collected through a series of quantitative and qualitative methods, including a survey, a workshop and detailed interviews with professionals in the retrofit industry. The structure of this approach was informed by preliminary data and information available on the Irish construction sector.

There is a substantial amount of ambiguity and reluctance among the professionals in reaching the Irish nZEB targets. The growing retrofit industry demonstrates low-quality auditing and pre/post-retrofit analysis. Basic services and depth of retrofits are compromised by project budgets and marginal profits. Unaligned value supply chain, poor interaction among nZEB professionals and fragmented services are deterrents to industry standardisation.

This study will enable construction industry stakeholders to make provisions for overcoming the barriers, gaps and challenges identified in the practices of the retrofit projects. It will also inform the formulation of policies that drive retrofit uptake.

This study has implications for understanding the social barriers existing in retrofit projects. Support from clients/owners has a diverse impact on energy performance and retrofit decisions. Community-based initiatives are key to unlock the promotion of nZEBs.

This paper provides an overview of current activities of retrofit professionals and analyses the barriers, gaps and challenges in the industry.

The purpose of this paper is to show the results of the task given by a major research program concerning low-energy building and indoor environment. The task was to develop contracting document model layouts to be used in zero-energy building (ZEB) and nearly zero-energy building (nZEB) construction projects.

A workshop method was chosen for gathering information and developing the layouts.

In the debate in the workshop three main topics arose: the selection of project delivery system, the use of performance controller for the heating, ventilation and air-conditioning (HVAC) systems and making innovation possible by making the call for bids as loose as possible.

The use of performance controller could be investigated more, and more accurate information and knowledge about the best practices on nZEB construction can be captured as the industry moves in that direction and more projects will appear.

The goals of the research program were met and also the main issues of nZEB construction contracting were documented, which can be utilized by the whole industry of house building.

Due to technological improvement and development of the vehicle-to-home (V2H) concept, electric vehicle (EV) can be considered as an active component of net-zero energy buildings (NZEBs). However, to achieve more dependable results, proper energy analysis is needed to take into consideration the stochastic behavior of renewable energy, energy consumption in the building and vehicle use pattern. This study aims to stochastically model a building integrating photovoltaic panels as a microgeneration technology and EVs to meet NZEB requirements.

First, a multiobjective nondominated sorting genetic algorithm (NSGA-II) was developed to optimize the building energy performance considering panels installed on the façade. Next, a dynamic solution is implemented in MATLAB to stochastically model electricity generation using solar panels as well as building and EV energy consumption. Besides, the Monte Carlo simulation method is used for quantifying the uncertainty of NZEB performance. To investigate the impact of weather on both energy consumption and generation, the model is tested in five different climatic zones in Iran.

The results show that the stochastic simulation provides building designers with a variety of convenient options to select the best design based on level of confidence and desired budget. Furthermore, economic evaluation signifies that investing in all studied cities is profitable.

Considering the uncertainty in building energy demand and PV power generation as well as EV mobility and the charging–discharging power profile for evaluating building energy performance is the main contribution of this study.

Net Zero-Energy Buildings (NZEBs) have received increased attention in recent years as a result of constant concerns about energy supply constraints, decreasing energy resources, increasing energy costs and the rising impact of greenhouse gases on world climate. Promoting whole building strategies that employ passive measures together with energy efficient systems and technologies using renewable energy became a European political strategy following the publication of the Energy Performance of Buildings Directive recast in May 2010 by the European Parliament and Council. However designing successful NZEBs represents a challenge because the definitions are somewhat generic while assessment methods and monitoring approaches remain under development and the literature is relatively scarce about the best sets of solutions for different typologies and climates likely to deliver an actual and reliable performance in terms of energy balance (consumed vs generated) on a cost-effective basis. Additionally the lessons learned from existing NZEB examples are relatively scarce. The authors of this paper, who are participants in the IEA SHC Task 40-ECBCS Annex 52, “Towards Net Zero Energy Solar Buildings”, are willing to share insights from on-going research work on some best practice leading NZEB residential buildings. Although there is no standard approach for designing a Net Zero-Energy Building (there are many different possible combinations of passive and efficient active measures, utility equipment and on-site energy generation technologies able to achieve the net-zero energy performance), a close examination of the chosen strategies and the relative performance indicators of the selected case studies reveal that it is possible to achieve zero-energy performance using well known strategies adjusted so as to balance climate driven-demand for space heating/cooling, lighting, ventilation and other energy uses with climate-driven supply from renewable energy resources.

The cost-optimal analysis is not able to address the multi-dimensionality of the decision according to the new European objectives and International sustainable development goals in the field of the nearly-zero energy building (NZEB) design. The purpose of this paper is to study the role of multi-criteria decision analysis (MCDA) for guiding energy investment decisions.

The paper explores the Preference ranking organization method for enrichment of evaluations II (PROMETHEE II) application to support the project of transforming a rural building into a NZEB. The evaluation provides an estimate of the effects of alternative energy efficiency measures, involving energy consumption, life cycle costs, carbon emissions, property value and indoor comfort criteria. The study performs a multi-actors analysis in order to understand how different consumers' point of views can influence the final choice of the best investment. Furthermore, a multi-site analysis explores the spatial variation of NZEB building appreciation in the real estate market.

The PROMETHEE II-based model ranks 16 alternative solutions for the NZEB according to energy, economic and extra-economic criteria. The multi-actors analysis highlights the configuration of the NZEB building that best meets the needs of different end-users, respecting the European directives and national standards. The multi-site analysis concludes that location does not change users' appreciation and not influence the output for the best solution.

The MCDA occurs as a support tool that helps to optimize the preliminary design phase of NZEB through the exploration of the optimal solution considering crucial criteria in the energy and environmental and real estate market rules.

Energy consumption and renewable energy sources are included in the goals for the 2030 Sustainable Development Goal 7 (SDG7) agenda, and target buildings are the biggest electricity consumers. In turn, Netzero energy buildings (NZEB) contribute to achieve SDG7 goals. This paper aims to identify which Brazilian higher education institutions (HEIs) practices contribute to developing the NZEB concept.

Case studies were selected to identify which implanted practices applied by HEIs in Brazil, listed in the UI GreenMetric 2020 Ranking, are related to the NZEB concept. The implemented sustainable practices were also analyzed to evaluate the connections and impact between universities and the local community.

Results show the lighting and air conditioning retrofit were among the most common practices related to energy efficiency to reduce consumption. For renewable energy generation, photovoltaic solar energy is the most common practice used by HEIs.

Only Brazilian HEIs listed in the UI Green Metric Ranking were analyzed. No standard regulation or formal reports support the wide dissemination of the strategies adopted by HEIs in Brazil.

The strategies adopted by HEIs related to Netzero buildings can reduce emissions, optimize operating costs and improve building comfort conditions, which connect all SDGs.

HEIs can promote awareness related to energy use and clean energy generation within the local community.

This paper presents the most common strategies adopted by Brazilian HEIs. However, limitations related to lack of strategies, data transparency and specific Netzero energy regulation were also found. These issues can hinder other HEIs to adopt similar strategies and contribute to the promotion of SDG7 in Brazil.