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Technological Dimensions of Nearly ZEB Design: Evolving toward a Nearly Zero Energy Oriented Landscape - Pages 80-85

Filippo Angelucci

DOI: https://doi.org/10.6000/1929-6002.2017.06.03.1

Published: 28 February 2018

 

Abstract: Today, the implementation framework of Zero Energy Building strategies is characterised by a complex transitional phase. In fact, it is still difficult to achieve completely autonomous buildings, disconnected from any power-supply network.

Despite the negative impact of climate-change and the progressive loss of non-renewable resources on our lifestyles, the global economic-financial crisis, local cultural-technological barriers, and the cost/complexity of design processes keep investment in this area unattractive.

However, there is an intermediate approach that can facilitate a gradual re-direction of building actions through the ZEB logic. It can be identified in the alternative of Near Zero Energy Building (Nearly ZEB or Near Net ZEB).

The Nearly ZEB approach, with its multiplicity of design aspects (i.e. cognitive, analytical, technical, and managerial) may configure a widespread state of progressive transition towards the architectural/inhabitable constructions sought by the 20-20-20 logic, at the scale of the building, the city, and the landscape.

These constructions have lower emissions, produce more energy from renewable sources, consume less non-renewable energy, and can “also” reach the objective of total energy autonomy (ZEB) or Plus Energy.

A twofold operating scenario emerges from this point of view. It is centred on the technological dimensions of designing a Nearly Zero Energy living space by overcoming the traditional concept of a building as a single object.

On the one hand, there is a need for a greater interaction between technological innovations and inhabitable spaces, in a trans-scalar key; design becomes an open process of technological-environmental modifications that addresses the transition towards the status of ZEB.

On the another hand, it becomes fundamental that the relationship between interior and exterior space, both public and private, is increasingly focused on the design of interface-systems in order to harmonise three new levels of relations (city-building, city-land, and building-land) and to configure a Nearly Zero Energy Oriented Landscape.

These aspects emerge from the contributions presented in this special issue on The Technological Dimensions of Nearly Zero Energy Building Design and will be addressed in this essay.

Keywords: Nearly ZEB Process, Environmental-Technological Design, Inter-systemic/Trans-scalar Design, Environmental Interfaces, Nearly Zero Energy Oriented Landscape.

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The Future of Research and Experimentation in Technological Design of the Relationships between Architecture, Energy and EnvironmentPages 86-93

Filippo Angelucci

DOI: https://doi.org/10.6000/1929-6002.2017.06.03.2

Published: 28 February 2018

 

Abstract: The problematic nature of the centrality of the focal core formed of the Technological Design/ Energy / Environment relationship has never been so evident as at the present time, together with the need to tackle it urgently. Humanity has been directly interfacing with the energy issue and the "non-renewability" of resources on the one hand, and the question of harmful and climate-changing emissions on the other part for other for at least thirty years. This is the reason why it is our principal scientific and ethical duty to focus a major part of our attention and efforts on research – as proved in Italy by a significant part of the activities of PhD Program in "Planning Design Technology" of Sapienza University of Rome, by "NZEB" cluster of SITdA Italian Society of Technology of Architecture and by National Work Group "Green Economy for Architecture and Cities" of CNGE National Council on the Green Economy – in order to take significant steps forward. And to provide incisive answers for the emergency situations represented by, to use the two iconic terms of the much larger set of questions, the Climate and Energy problems. On the other hand, if it is true that the Nearly Zero Energy Building slogan specifically alludes to the scale of action, what is certain is that, at an international level, this is not the sole correct level on which we can and we must operate in order to have a chance of success, effectiveness and obtainment of that efficiency referred to in the first European directive 2002/91/EC through to the most recent 2010/31/EU “Energy Performance of Buildings” and 2012/27/EU "Energy Efficiency" which, inter alia, establish the concept of NZE architecture. So the working dimension becomes primarily "a-scaleable", in its need to oscillate constantly, with ongoing feedback, between actions at various leveles. Research related to the broad areas of Nearly Zero Energy Architecture developed in recent years fits into Technological Design in this sense and in this light, mainly in relation to regeneration of the existing architectural heritage, technologies for new building projects, process governance, the systemic approach on an urban scale, environmental and energy sustainability protocols, smart communities and cultural heritage.

Keywords: Near Zero Energy Architecture, Technological Design, Ecoefficiency, Built Environment, Green Economy.

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Simulation of Dynamic Thermal Behaviour for Housing in Warm Climate: The Case of Thermal Mass in Lightweight EnvelopesPages 94-107

Chiara Tonelli and Ilaria Montella

DOI: https://doi.org/10.6000/1929-6002.2017.06.03.3

Published: 28 February 2018

 

Abstract: Comparison between simulation results and measured performances is usually an open scientific problem, crucial to achieving the goal of NZEB performance.

This paper addresses this issue in relation to residential buildings, using as a case study “RhOME for denCity”, the housing prototype developed by Roma TRE University and winner of Solar Decathlon Europe 2014.

In a Mediterranean climate, the use of the mass combined with natural cross ventilation to control the indoor microclimate can be very effective in reducing HVAC use. Therefore, a “massive layer” was introduced in the inner surface of the envelope to not only contribute to the envelope transmittance value and the shifting phase of the thermal waves, but also as a thermal shock absorber to adjust the internal temperature, in both summer and winter.

This experimental envelope was tested over two weeks during the competition in Versailles. Although prototype thermal behaviour was monitored only during the competition, and not over an extended period, initial results provide information on how to size the thermal mass contribution for indoor comfort. In-depth simulation through TRNSYS was run prior to the construction phase. This paper presents the comparison between monitored performance and simulations in order to measure the amount of mass needed to obtain a numerical improvement in indoor comfort performance.

Keywords: Thermal mass contribution, Energy performance in Mediterranean Climate, Dynamic thermal simulation, Thermal mass in lightweight envelope, building performance comparison.

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Adaptive Models for the Energy Efficiency of Building EnvelopesPages 108-117

Martino Milardi

DOI: https://doi.org/10.6000/1929-6002.2017.06.04.1

Published: 28 February 2018

 

Abstract: The debate on energy efficiency in buildings has already established the strategic role of the envelope to achieve the control objectives of consumption and housing quality. The study shows, it ranks in the innovative experimentation scenario, following the directions of the regulations 2010/31/EU (EPBD 2) and its objective is the realization of a building envelope "adaptive", characterized by the ability to dynamically respond to stress from the environmental context with which it relates.

The experiment aimed at perfecting a model of intervention that can guide the design choices towards elements that make up the building envelope, characterized by a strong interactive-adaptive component. This is based on the combination of: layers of innovative envelope, systems using RES and SMART management requirements of the system, with a focus on intelligent control energy flows between external/internal and adaptive performance of the layers. The mode of "deferred layering" in relation to the orientation of the building and to climate periods, while for the control of wrap responses subjected to environmental stress, the research adopts BEMS & BIM systems and other related criteria will be defined.

The experiment aims to satisfy the requirements to improve the energy performance of buildings by reducing the impacts (emissions), through the development of a technical system.

The results obtained from inspections in progress, show that the constituent layers that envelope react in a synergistic way and adapted to different climatic conditions, ensuring high-quality performance, in line with the energy efficiency targets established by regulatory standards.

Keywords: Building energy performance, SMART Building envelope, Energy efficiency, Integrated design, Adaptive components, Up-coming technologies.

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