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J: Paper Session_T11: Methods of Sustainability, LEED and Performative Environments
9:45am - 11:15am
Panel Moderator: Hazem Rashed-Ali
Methodology to Incorporate the Value of Sustainability in Buildings
Sandra Guerrero, Irene Marincic
Universidad de Sonora, Mexico
ABSTRACT: The implementation of new technologies and systems applied in real estate to improve people's living conditions, represent benefits on various aspects that have a positive impact on the reduction of energy consumption, on savings on consumption expenditure, and quality impact on the improvement of the environment. The application of the norms of the new urban agenda on real estate, and the sustainability factor in buildings obliges to include in the methodologies established for the valuation of real estate new indicators that represent and add value to the property. For this reason, we present this proposal for establishing sustainability indicators that can be incorporated into the methodologies used for real estate valuation and provide parameters that benefit not only the user and owner of the property but the environment in general. Through this paper we present a real estate valuation methodology, which considers the sustainable aspects of the real state to be valued, it includes the environmental variables of energy efficiency, and the use of water and trees, in its analysis. These variables are applied as a sustainability factor that affects the final value of the real state obtained by traditional methods.
KEYWORDS: Sustainability, Real state valuation, Energy efficiency.
LEED-certified Buildings Versus Non-LEED-certified Buildings: a Deep Dive Into the Performance
University of Maryland, United States of America
This study aims to understand the actual performance difference between LEED buildings and non-LEED buildings. Since 2012, the District of Columbia (DC) has amended regulations so that all buildings must report their building energy use. We have cross-referenced the most recently published data of the 2019 DC energy benchmarking database with the U.S. Green Building Council’s LEED project database to identify DC properties in both databases that are expected to reduce building operating energy use and greenhouse gas emissions. We compared LEED office buildings and non-LEED-certified office buildings using their reported operating source and site energy use intensity (EUI). The results show that LEED office buildings do not perform better at any of the certified levels. On the contrary, those reported LEED buildings collectively use 17% more source energy and 13% more site energy than non-LEED buildings. Among the different LEED levels, LEED Silver appears to perform slightly better than the other LEED levels. Meanwhile only around 33% of qualified LEED office buildings reported their actual energy use according to the DC regulation. The purpose of this study is not to criticize the LEED rating system; instead, we want to improve the system in order to meet DC’s carbon neutrality goal. To this extent, we conclude that the U.S. LEED rating system can benefit from learning from other green building rating systems that include reporting and verification as prerequisite requirements.
From Nano to Building Scale: A Methodology for the Design and Fabrication of Acoustical Diffuses Based on Quasi-Crystalline Atomic Structure
University of Utah
The discovery of quasi-crystalline atomic order in the solid-state physics has challenged decades of foundational knowledge in crystallography. The atoms in these novel quasi-crystalline structures are not arranged according to regularly spaced intervals similar to traditional crystals, instead they exhibit a long-range translational order that is not periodic. Three decades after their initial discovery, hundreds of quasicrystals have been reported; exposing a wealth of untapped potentials. Because of their unique isotropic, self-similar and hierarchical order, quasi-crystalline structures offer unique opportunities for addressing questions related to their acoustical behavior. In 2018, Ajlouni demonstrated that the quasi-periodic formations have the ability to diffuse and orchestrate the flow of sound energy; eliminating a major limitation with the repeating logic of traditional periodic diffusers. A major limitation with periodically arranged diffusers, is that they create repetitive energy loops that significantly reduce their ability to uniformly disperse sound energy. The goal of this paper is to introduce a generalized structural method for designing surfaces with quasi-periodic geometry for architectural acoustics. The paper also explores two methods for the fabrication of these surfaces using ceramic casting and vacuum forming processes. By utilizing the qualities of quasi-periodic structures, this research hopes to inspire a new wave of acoustical surface diffusers that allow designers to encode a wide range of acoustical behavioral properties without scarifying the aesthetic qualities.