Sandra Corasaniti

Sandra Corasaniti
University of Rome Tor Vergata | UNIROMA2 · Department of Industrial Engineering

PhD

About

33
Publications
4,404
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
510
Citations

Publications

Publications (33)
Article
Full-text available
Automatic fault diagnosis is becoming increasingly important for assessing a chiller’s degradation state and plays a key role in modern maintenance strategies. Data-driven approaches have already become well established for this purpose as they rely on historical data and are therefore more generally applicable compared to their model-based counter...
Conference Paper
Full-text available
Vapor compression refrigeration systems are subject to performance degradation over time due to the presence of faults. However, latest work in the field of condition-based maintenance shows promising results in the automatic early detection of anomalous behaviour as well as in accurate machine diagnostics and can, therefore, increase the overall s...
Chapter
Full-text available
Vapor compression refrigeration systems (VCRS) are an integral part of many industrial pro- cesses and are in the centre of process reliability and system availability considerations. These systems belong to the most important subsystems within the refrigeration cycle [1], which is why early fault detection and diagnosis can contribute to reducing...
Article
In vapour compression refrigeration systems, oil circulates to lubricate moving parts. However, due to its low miscibility with most environmentally friendly refrigerants, such as ammonia, it is retained in some parts of the system causing losses in the overall system efficiency. Therefore, this paper focusses on the investigation of the fault char...
Article
This work focuses on the evaluation of the effective thermal conductivity of ultra-light materials, as the highly porous two-phase systems (foams). The main aim of the paper is to show that the exact mathematical solution of the heat conduction equation, based on the constitutive Fourier law and without any empirical constant nor ad hoc assumptions...
Article
Full-text available
This work deals with the feasibility and reliability about the use of shape memory alloys (SMAs) as mechanical actuators for solar sail self-deployment instead of heavy and bulky mechanical booms. Solar sails exploit radiation pressure a as propulsion system for the exploration of the solar system. Sunlight is used to propel space vehicles by refle...
Article
Full-text available
Thermal diffusivity of GNPs (graphene nano-platelets) is an important thermo-physical property as it is useful to predict the material behavior in many heat transfer applications. GNP samples were pressed at different loads to obtain different densities, and then thermal diffusivity was measured with the flash method. All samples were coated with a...
Article
Full-text available
The paper presents an analysis of the experimental parameters involved in application of the dual-probe heat pulse technique, followed by a critical review of methods for processing thermal response data (e.g., maximum detection and nonlinear least square regression) and the consequent obtainable uncertainty. Glycerol was selected as testing liquid...
Article
Numerical simulations of three configurations of a modified Trombe-Michel Wall (TMW) are carried out and the numerical results are employed to carry on the energy and exergy analyses. The three configurations of the modified Trombe-Michel Wall (TMW) investigated are with sharp edges, with rounded edges and with the guided flow. For each configurati...
Article
Full-text available
The present work deals with the measurement of thermo-physical properties of a freestanding sheet of graphene (thermal diffusivity and thermal conductivity), and their dependence on sample density as result of uniform mechanical compression. Thermal diffusivity of graphene nano-platelets (thin slabs) was measured by the pulse flash method. Obtained...
Article
Natural convection around a vertical cylindrical, immersed in a fluid-saturated porous medium, is investigated experimentally. The porous medium is made of glass beads with particles of the same diameter, 3 mm, and is saturated with water. The vertical cylinder, with diameter of 1.5 mm and long 150 mm, is a thermal probe, containing an electric hea...
Article
Full-text available
Due to lack of reliable thermal diffusivity data of sintered steels in literature, experimental investigations were conducted on samples made of different powder types (based on prealloyed, or diffusion-bonded, or admixed powders) and under different process conditions. So the influence of pressing pressure and sintering temperature on thermal diff...
Article
The paper investigates the anisotropic thermal efficiency of symmetric composites made of two components, matrix and fiber reinforcement. The anisotropic degree of the composite is the ratio between the effective thermal conductivity in the direction parallel to the fiber reinforcement, and that in the perpendicular direction. The potential anisotr...
Article
The paper employs a theoretical model to evaluate the thermal conductivity of composites under two thermal assumptions which allow to solve the heat conduction equation. The composite is made of a ceramic-silica matrix and a fiber reinforcement. Three different materials are investigated as reinforcement, i.e. asbestos, steel and copper. The theore...
Article
The aim of the present paper is to present a new model without empirical constants to evaluate the effective thermal conductivity of three-phase soils. In the model the soil is made of a quasi-spherical solid grain, and is surrounded by two phases, which can be air and water or air and ice. The effective thermal conductivity is obtained theoretical...
Article
The present work is aimed to evaluate the effective thermal conductivity of an ablative composite material in the state of virgin material and in three paths of degradation. The composite material is undergoing ablation with formation of void pores or char and void pores. The one dimensional effective thermal conductivity is evaluated theoretically...
Conference Paper
The aim of the present paper is to determine the effective thermal conductivity of three-phase soils, made of a quasi-spherical solid grain, and surrounded by two phase, which can be water and air or water and ice. The effective thermal conductivity is obtained theoretically by integrating the conduction equation under the thermal distribution of p...
Conference Paper
The composite is made of a matrix and a fiber-reinforced material to form a non-homogeneous anisotropic material. Thermal behaviour of composite materials is very important in many applications as heat shields and heat guides. The present paper investigates theoretically a composite material made of a silica matrix and a fiber reinforcement made of...
Article
Composite materials are made of several constituents with different physical properties, and are often anisotropic, although the single materials are not. The effective thermal conductivity and diffusivity of a multilayer composite are evaluated in the two main directions (x and y), theoretically and numerically, as a function of the reinforcement...
Article
The present work reviews the information on mineralogy and chemistry of Martian soils from the data of Landers and remote sensing. Compositional information from Mars Pathfinder Landers indicates a mixture of weathered local rocks of mafic composition. If the Martian soil is composed by sediments only, porosity can be 50% at the surface. In other a...
Article
The present work investigates the time oscillations of the temperature at several depths of a Martian soil analogue made of two layers of different physical properties. The maximum temperature–time oscillation inside the Martian soil analogue, DT, and its derivative with depth, d(DT)/dz or DDT, can be analysed to understand the presence of a bounda...
Article
Full-text available
Thermal conductivity models of frozen soils were analyzed and compared with similar models developed for frozen foods. In total, eight thermal conductivity models and 54 model versions were tested against experimental data of 13 meat products in the temperature range from 0 to −40 °C. The model by deVries, with water+ice (wi) as the continuous phas...
Conference Paper
The study performs the prediction of the tempkture distribution in a Martian soil. The thermal conductivity of the soil is predicted with a theoretical model which assumes the porous medium as represented by a cubic cell, where the solid particle is a cube at the center of the cell, and the gas or the ice are around it. The thermal diffusivity of t...
Article
Mars soil analogues, in dry and frozen conditions, are investigated, as far as the thermal conductivity prediction and the temperature variation, along its depth, are concerned. The thermal conductivity is theoretically predicted with the cubic cell model, which requires the knowledge of the thermal conductivity of the solid particle and of the mat...
Article
The thermal conductivity of olivine, dry and mixed with water, up to saturation, has been measured with a thermal probe, using the step heating method. The olivine is composed of solid particles with dimensions in the range from 0.8 to 1 mm. Dry olivine has been measured in the range of temperatures between –17 to +50C. Olivine mixed with water has...
Article
The theoretical model of the present paper assumes the unit cell of the porous medium as composed of a cubic space with a cubic solid particle at the center. The thermal conductivity is evaluated by solving the heat conduction equation with the assumption of parallel isotherms within the cubic space. The liquid water in the porous medium is distrib...
Article
The prediction of the thermal conductivity of soils is important in several phenomena related to ground. Among the practical applications at high temperatures are geothermal energy extraction, enhanced oil recovery, radioactive waste storage, ground heat pump and heat exchanger, forest fires and related problems. Some experimental results are avail...

Network

Cited By