Ignacio Peralta

Ignacio Peralta
Automotive Cells Company · Bruges Expertise Center

PhD in Computational Mechanics
Former postdoc at CONICET (Argentina) and TU Darmstadt (Germany)

About

47
Publications
12,846
Reads
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471
Citations
Introduction
Computational design of metamaterials and metadevices, specially for thermal and mechanical applications (also coupled).
Additional affiliations
July 2021 - present
Technische Universität Darmstadt
Position
  • PostDoc Position
April 2020 - present
National Scientific and Technical Research Council
Position
  • PostDoc Position
August 2018 - November 2018
University of California, San Diego
Position
  • International exchange
Education
April 2015 - December 2019
Universidad Nacional del Litoral
Field of study
  • Engineering
March 2009 - March 2015
Universidad Tecnológica Nacional
Field of study
  • Mechanical Engineering

Publications

Publications (47)
Article
Full-text available
To gain control over the diffusive heat flux in a given domain, one needs to engineer a thermal metamaterial with a specific distribution of the generally anisotropic thermal conductivity throughout the domain. Until now, the appropriate conductivity distribution was usually determined using transformation thermodynamics. By this way, only a few pa...
Article
Full-text available
In this work, we present a new method for the design of heat flux manipulating devices, with emphasis on their fabricability. The design is obtained as solution of a nonlinear optimization problem where the objective function represents the given heat flux manipulation task, and the design variables define the material distribution in the device. I...
Article
In this work, we present a new method for the design of heat flux manipulating devices, with emphasis on their manufacturability. The design is obtained as solution of a nonlinear optimization problem where the objective function represents the given heat flux manipulation task, and the design variables define the material distribution in the devic...
Article
Full-text available
We present a new method for the design of devices to manipulate the displacement field in Elastic materials. It consists of solving a nonlinear optimization problem where the objective function defines the error in matching a desired displacement field, and the design variables determine the required material distribution within the device. In orde...
Article
Full-text available
Progress in material science has allowed the control of different physical fields in a manner that would be unachievable with ordinary materials. The development of engineered materials (the so‐called metamaterials) to control the conductive heat flux has revolutionized the manner of manipulating thermal energy and allowed the possibility of guidin...
Article
Full-text available
The integration/combination of seismic and energy retrofit measures has been a subject of study for the past decade, exhibiting promising prospects. The main objective of these interventions is to mitigate seismic vulnerability while concurrently enhancing the energy performance and efficiency of new and existing buildings. Integrated approaches ca...
Article
Full-text available
Addition of different types of phase change materials (PCMs) to cement-based materials for thermal energy storage has been broadly investigated in the literature. Many studies have researched the addition of organic PCMs and the thermal performance of the PCM-cement system. However, drawbacks such as leakage and poor thermal conductivity of the PCM...
Chapter
Full-text available
The retrofitting of existing buildings is crucial for improving their structural safety, reducing damage, and enhancing energy efficiency while maintaining their distinctive features. Seismic retrofitting and thermal energy retrofitting are two effective approaches that can be integrated to achieve enhanced seismic performance and reduced energy co...
Chapter
This paper presents ongoing research activities that investigate the development of carbon-neutral binder-based composites for Thermal Energy Storage (TES) and energy retrofitting in multi-layer stone masonry wall systems. The study involves preliminary laboratory characterizations of integrated energy and structural retrofitting systems for histor...
Conference Paper
Full-text available
Daytime radiative cooling (DRC) is an innovative concept of passive cooling that can achieve sub-ambient temperatures, even in the presence of intense sunlight. By integrating DRC as a finishing layer in building envelope systems, it becomes possible to take advantage of this phenomenon to increase the indoor comfort in hot seasons. In this study,...
Article
Full-text available
Foamed concretes are highly porous materials with excellent insulation properties. Their thermal conductivity is strongly dependent on the pore structure, characterized by the porosity as well as the shape and size distribution of pores. To define the representative volume element (RVE) of foamed concretes with high fidelity, we develop NRGene, an...
Conference Paper
Full-text available
This paper presents ongoing research activities that investigate the development of carbon-neutral binder-based composites for Thermal Energy Storage (TES) and energy retrofitting in multi-layer stone masonry wall systems. The study involves preliminary laboratory characterizations of integrated energy and structural retrofitting systems for histor...
Article
Full-text available
Ordinary Portland Cement (OPC)-and alternative binder-based materials have been widely used in Thermal Energy Storage (TES) applications due to their excellent TES capacities, good mechanical properties and low-cost. In this attempt, this work proposes an upscaling procedure to model the TES properties of two hydrated pastes made of OPC and a Hybri...
Article
Full-text available
Technologies that can contribute to the reduction of greenhouse gases are mandatory, and those based on solar energy are good candidates to achieve this. In this sense, massive solar thermal collectors are suitable technologies for supplying the primary energy demand of buildings. To design these devices, it is necessary to fully understand the phy...
Chapter
Energy demand for heating and cooling represents a large part of building´s (residential and non-residential) energy consumption around the world. Development of thermal insulating construction elements with thermal energy storage and release capacity could be one way of reducing this consumption while maintaining thermal comfort inside the buildin...
Chapter
Climate change and global warming are problems that our planet is currently leading with. Main outcomes of Climate Change Conferences all around the globe, like the COP27, deal with the reduction of CO2, the removal of inefficient fossil subsidies and the promotion of renewable energies. To achieve these goals, this work presents new cementitious m...
Chapter
Full-text available
A metamaterial is a composite with unprecedented properties, either in nature or in the market. Specifically designed, a metamaterial exhibits either extraordinary or “à la carte” macroscopic physical properties, or allows the device made of it (the “metadevice”) to have an optimal response. In the context of the thermal performance of a building,...
Article
Full-text available
The scattering of light by resonant nanoparticles is a key process for enhancing the solar reflectance in daylight radiative cooling. Here, we investigate the impact of material dispersion on the scattering performance of popular nanoparticles for radiative cooling applications. We show that, due to material dispersion, nanoparticles with a qualita...
Preprint
The scattering of light by resonant nanoparticles is a key process for enhancing the solar reflectance in daylight radiative cooling. Here, we investigate the impact of material dispersion on the scattering performance of popular nanoparticles for radiative cooling applications. We show that, due to material dispersion, nanoparticles with a qualita...
Conference Paper
Full-text available
The hysteresis of phase change materials (PCMs) is a temperature delay of the enthalpy curves between the melting and solidification. This work assesses the impact of modelling the PCM hysteresis on the building performance simulation. To this end, a series of PCM models, considering and not the hysteresis phenomenon, are implemented in EnergyPlus...
Article
A cement-based device that can meet, partially or completely, the heating loads of a building by absorbing the solar radiation and converting it into thermal energy can be defined as a Massive Solar-Thermal Collector. The absorbing material for the incoming radiation is made of a cementitious composite, generally concrete, and flowing water inside...
Article
Full-text available
The study is focused on ultra-light foam concrete (FC) aimed as a thermal insulation material. Two important properties of such material were investigated: compressive strength and thermal conductivity. In the conducted tests, the influence of the air-dry density (200–500 kg/m3), type of foaming agent (synthetic and protein) and binder type (ordina...
Article
Problems with moving sources and moving inner boundaries in transient regime are of high interest in many research fields and engineering applications. One approach to properly tackle such problems is based on the Chimera method for non-matching grids, where each moving object is defined on a fine mesh that moves across the fixed coarse background....
Conference Paper
Full-text available
En este trabajo se diseñan dispositivos para manipular el flujo difusivo de especies, por medio de técnicas de optimización topológica. El procedimiento empleado se basa en el método de optimización con materiales discretos (OMD), el cual es usado en el marco de un problema de optimización topológica donde la función objetivo define el error en el...
Presentation
Full-text available
Objetivos del trabajo: • Estudiar mecanismos para la extracción de calor en períodos de baja radiación solar. • Analizar si el uso de materiales con cambio de fase (PCMs) puede mejorar el desempeño térmico de los colectores. • Encontrar una distribución optimizada de materiales que maximice el desempeño térmico de un colector a lo largo de todo un...
Article
Full-text available
The present work has been conducted in order to introduce a novel approach for the design of mechanical devices conceived to manipulate the displacements field in linear elastic materials subjected to thermal gradients. Such an approach involves the solution of a topology optimization problem where the objective function defines the error in achiev...
Article
Full-text available
The design of large and lightweight wind turbines is a current challenge in the wind energy industry. In this context, this work aims to present a novel methodology to reduce the mass of composite wind turbine blades by combining evolutionary and topology optimization schemes in a staggered mode. First, the optimal laminate layout in the outer shel...
Conference Paper
Full-text available
En este trabajo se presenta un nuevo método para el diseño de meta-dispositivos térmicos para manipular el flujo de calor en régimen transitorio, considerando además propiedades físicas y de transporte termo-dependientes. El mismo consiste en resolver un problema de optimización no lineal a gran escala cuya función objetivo a ser minimizada es el e...
Presentation
Full-text available
Se propone una metodología para reducir el peso de álabes de turbinas eólicas combinando Algoritmos Genéticos con Optimización Topológica en un proceso de dos pasos escalonados.
Article
Full-text available
The present work introduces the optimization-based approach for the design of metadevices to manipulate the heat flux in transient regime. It consists of solving a continuous, nonlinear, constrained, large-scale optimization problem where the objective function (to be minimized) is the error in accomplishing a given heat flux manipulation task alon...
Article
Full-text available
Savonius wind turbines are the most suitable devices used in urban areas to produce electrical power. This is due to their simplicity, ease of maintenance, and acceptable power output with a low speed and highly variable wind profile. However, their efficiency is low, and the development of optimization tools is necessary to increase the total powe...
Article
Full-text available
We introduce the optimization-based method for the design of thermo-mechanical metamaterials and, particularly, for the elastostatic cloaking under thermal loads. It consists of solving a large-scale, nonlinear constrained optimization problem, where the objective function is the error in the cloaking task accomplishment. The design variables defin...
Presentation
Full-text available
The present work has been conducted in order to propose a novel approach for the design of heat conduction manipulation thermal deviceswith materials of thermo-dependent conductivity. Such an approach involves the solution of a nonlinear optimization problem defining the objective function in terms of the error in achieving the required heat flux m...
Presentation
Full-text available
The present work has been conducted in order to propose a novel approach for the design of mechanical devices oriented to manipulate the displacements field in linear elastic materials subject to thermal gradients. Such an approach involves the solution of a nonlinear optimization problem where the objective function defines the error in achieving...
Conference Paper
Full-text available
En el presente trabajo se propone un nuevo método de diseño de dispositivos mecánicos para manipular el campo de desplazamientos en materiales elásticos lineales sometidos a gradientes térmicos. El mismo consiste en resolver un problema de optimización no lineal donde la función objetivo define el error en lograr el campo de desplazamientos deseado...
Presentation
Full-text available
En este trabajo se propone el DISEÑO COMPUTACIONAL DE METAMATERIALES (CMMD), considerando FABRICABILIDAD, como alternativa al diseño clásico basado en termodinámica de transformación.
Presentation
Full-text available
Investigación numérica del efecto de deflectores sobre el rendimiento de una turbina de eje vertical. Determinación de la geometría y ubicación óptima de los deflectores para mejorar la eficiencia de la turbina construida. Desarrollo de una metodología de optimización basada en gradientes acoplada con un metamodelo de redes neuronales.
Conference Paper
Full-text available
El objetivo de este trabajo es realizar la optimización geométrica de los deflectores de aire para una turbina eólica de eje vertical (VAWT) impulsada por arrastre (drag) tipo Savonius. El torque generado por este tipo de turbinas resulta de la diferencia entre las fuerzas de arrastre generado por las geometrías concavas y convexas de los álabes, r...
Presentation
Full-text available
Para manipular el flujo de calor a voluntad es necesario usar materiales de diseño ("metamateriales") con conductividad térmica anisótropa. En este trabajo se propone el DISEÑO COMPUTACIONAL DE METAMATERIALES (CMMD) como alternativa al diseño basado en termodinámica de transformación.
Article
This paper presents a novel methodology to design wind turbine blades using the Inverse Finite Element Method (IFEM). IFEM takes as domain of analysis the geometry of the blade after large elastic deformations caused by given service loads. The deformed shape of the blade is that determined to be efficient using an aerodynamics analysis. From this...
Conference Paper
Full-text available
To gain control over the diffusive heat flux in a given domain, one has to design metamaterials with a specific distribution of the generally anisotropic thermal conductivity throughout the domain. Until now, the appropriate conductivity distribution was usually determined using transformation thermodynamics. By this way, only a few particular case...

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