Revistas
Revista:
JOURNAL OF BUILDING PHYSICS
ISSN:
1744-2591
Año:
2022
Vol.:
45
N°:
5
Págs.:
675 - 720
Adaptive facades are a promising choice to achieve comfortable low-energy buildings. Their effective performance is highly dependent on the local boundary conditions of each application and on the way the dynamic properties are controlled. The evaluation of whole building performance through building performance simulation can be useful to understand the potential of different Adaptive opaque facades (AOF) in a specific context. This paper evaluates through dynamic simulations promising design solutions of AOF for a residential building use in six different climates. It quantifies the total delivered thermal energy of 15 typologies of AOFs which consist of alternative adaptation strategies: (i) variation of solar absorptance of the cladding, (ii) variation of the convective heat transfer of air cavities and (iii) adaptive insulation strategies. For the first time, it also quantifies the performance of AOF which combine more than one adaptation strategy. The results show that the variation of the heat transfer by means of Adaptive Insulation components has the most significant impact on the reduction of the thermal energy use. The variation of the solar absorptance has also a significant positive impact when reducing heating consumption, but only if this adaptation strategy is actively controlled and combined with Adaptive Insulation components.
Revista:
SUSTAINABILITY
ISSN:
2071-1050
Año:
2020
Vol.:
12
N°:
23
Págs.:
10118
Adaptive Opaque Facades (AOF) is an innovative concept with potential to achieve low carbon energy buildings. However, so far AOF are not integrated in the construction industry. One remarkable issue that designers have when dealing with alternative low-carbon technologies, such as AOF, is the absence of previous built experiences and the lack of specialised technical knowledge. Design roadmaps can be convenient solutions to guide pioneer low carbon technology applications. This work presents a roadmap to assist the performance-based early-stage design process of Adaptive Opaque Facades. Previous research developed new approaches and tools to assist on the construction definition of AOF, so that their adaptive thermal performance was considered when specific design decisions needed to be made. The roadmap presented in this paper organises the implementation sequence of each methodological approach and tools in dierent design stages, which aims to provide a holistic design approach for AOF. The usability of the roadmap was validated in a workshop called ¿Performance-based Design and Assessment of Adaptive Facades¿ with master students representing the target group of this roadmap. Even though these students had never heard about AOF before, they could successfully design, define the early-stage characteristics of an AOF and quantify the thermal performance of their AOF designs. The roadmap was proven to be a useful support, which might make the implementation of AOF more appr
Revista:
SUSTAINABLE CITIES AND SOCIETY
ISSN:
2210-6707
Año:
2020
Vol.:
60
Págs.:
102232
Mainstream design approaches for low-energy buildings make use of highly-insulated building envelopes. However, if facades are always blocking energy exchange, the climatic resources surrounding the built environment might remain untapped or issues like overheating could arise. By reducing energy demand or improving indoor comfort, adaptive opaque facades are considered a promising sustainable alternative. The usual approach for designing adaptive facades relies on detailed simulations of specific facade components. Such technology-oriented approaches tend to be incompatible with the early-stage design process and do rarely make a conscious analysis of the potential climatic resources, which could result in sub-optimal facade adaptation strategies. This paper presents a new methodological approach called Dynamic Climate Analysis (DCA) and shows that it is possible to narrow down the preferable adaptive opaque facade responses at early design stages by extracting relevant transient information from weather files. Users only define the location, geometry and placement of the facade. It was concluded that DCA represents a broadly useful early-stage design decision support because of its ability to estimate the proportion of preferred adaptive thermal behaviours without proposing defined technological solutions. Therefore, DCA is an effective approach to test the potential application of upcoming responsive technologies in specific built contexts.
Revista:
ENERGY
ISSN:
0360-5442
Conventional cooling systems in large office buildings typically incorporate evaporative cooling towers, despite the drawbacks of direct evaporation. An alternative approach is based on highly selective innovative surfaces capable of daytime radiant cooling, however, prototypes of these cooling radiators have not yet demonstrated a system capable of cooling an actual building. This paper presents a third approach: A hybrid cooling system designed to partly or completely replace a cooling tower using dry heat dissipation panels. Unlike nocturnal cooling radiators, these panels may be integrated into a facade in a vertical position. The hybrid system is described firstly, where two configurations of the system are considered. Then, an evaluation of the hybrid system in comparison to a conventional system is performed by means of a simulation-based study, resulting that the replacement of a cooling tower by cooling panels increases the annual energy consumption by 3.6% compared to a conventional open circuit cooling tower system. However, the decrease in maintenance costs may reduce the annual operational expenses by over 50%. (C) 2020 Published by Elsevier Ltd.
Revista:
IOP CONFERENCE SERIES. EARTH AND ENVIRONMENTAL SCIENCE
ISSN:
1755-1307
Año:
2018
N°:
154
Págs.:
1 - 8
Revista:
JOURNAL OF FACADE DESIGN AND ENGINEERING
ISSN:
2213-302X
Año:
2018
Vol.:
6
N°:
2
Págs.:
109 - 119
Revista:
JOURNAL OF FACADE DESIGN AND ENGINEERING (ONLINE)
ISSN:
2213-3038
Año:
2018
Vol.:
6
N°:
3
Págs.:
19 - 33
Today¿s society needs to face challenging targets relating to environment and energy efficiency, and therefore the development of efficient façade systems is essential. Innovative concepts such as Adaptive Building Façades might play a role in the near future, as their dynamic behaviour could optimise the performance of a building. For their successful development, a balance between sophistication and benefit is necessary and the implementation of Smart and Multifunctional Materials in building envelopes could be the key, as they have the ability to repeatedly and reversibly change some of their functions, features, or behaviours over time in response to environmental conditions. However, these materials were predominantly developed for use in other fields, and there is a lack of specific technical information to evaluate their usefulness in façade engineering. The aim of this paper is to collect the critical information about promising responsive materials for use in the design of Adaptive Façades, in order to help designers and technicians in decision-making processes and to scope possible future applications in façades. Investigated materials were analysed from the Building Science standpoint; their weaknesses and threats in the built environment were highlighted, and their technical feasibility was examined through the study of their availability in the current market.
Revista:
ENERGY AND BUILDINGS
ISSN:
0378-7788
Año:
2017
Vol.:
142
Págs.:
158 - 166
The energy used for cooling has increased in recent decades and the predicted future rise in consumption is driving a pressing need for more efficient technologies. Some technologies use environmental sinks as heat dissipation alternatives. This paper presents a model validation with experimental data from a passive vertical cooling panel. The novelty of the solution lies in two main characteristics. The first is that the panel is in a vertical position, and thus the heat sink is the ambient temperature and surrounding instead of the sky temperature. The second is that the panel is north-oriented. Avoiding the sun lengthens the operating time to the entire day, while most studies explore options that are limited to night radiation. The aim is to include this element as a heat exchanger before water moves into the cooling tower from the condenser stage in cooling systems. The results have shown that the model approaches significantly the experimental data with an average error of 1.5% in the dissipated heat. Besides, the cooling capacity of the panel varies from 107 to 230 W/m2 depending on the inlet temperature and fluid flow conditions, confirming the viability of the integration in buildings.
Revista:
APPLIED ENERGY
ISSN:
0306-2619
Año:
2016
Vol.:
168
Págs.:
691 - 705
Buildings today represent 40% of world primary energy consumption and 24% of greenhouse gas emissions. In our society there is growing interest in knowing precisely when and how energy consumption occurs. This means that consumption measurement and verification plans are well-advanced. International agencies such as Efficiency Valuation Organization (EVO) and International Performance Measurement and Verification Protocol (IPMVP) have developed methodologies to quantify savings. This paper presents a methodology to accurately perform automated envelope calibration under option D (calibrated simulation) of IPMVP ¿ vol. 1. This is frequently ignored because of its complexity, despite being more flexible and accurate in assessing the energy performance of a building. A detailed baseline energy model is used, and by means of a metaheuristic technique achieves a highly reliable and accurate Building Energy Simulation (BES) model suitable for detailed analysis of saving strategies. In order to find this BES model a Genetic Algorithm (NSGA-II) is used, together with a highly efficient engine to stimulate the objective, thus permitting rapid achievement of the goal. The result is a BES model that broadly captures the heat dynamic behaviour of the building. The model amply fulfils the parameters demanded by ASHRAE and EVO under option D.
Autores:
Antón, R; Ayala,Gabriel; Mouzo, Francisco; et al.
Revista:
INTERNATIONAL JOURNAL OF ENGINEERING EDUCATION
ISSN:
0949-149X
Año:
2014
Vol.:
30
N°:
2
Págs.:
495 - 504
Revista:
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
ISSN:
0364-5916
Año:
2014
Vol.:
45
Págs.:
62-117
Revista:
SOLID STATE PHENOM
ISSN:
1012-0394
Año:
2011
Vol.:
172-174
Págs.:
1164 - 1170
