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Thermodynamic analysis of the optimal operating conditions for a two-stage CO2 refrigeration unit in warm climates with and without ejector
Elsevier (2021-02-25)The natural refrigerant R744 seems to be the long term solution to be imposed in the food retail industry, where low and medium refrigeration temperatures are usually required, despite the technical difficulties related ... -
Thermodynamic evaluation of CO2 for ultra-low temperature refrigeration
Elsevier (2023-09-12)Carbon dioxide (CO2, R744) is the only refrigerant in the safest class by the ASHRAE 34 Standard in the group of natural refrigerants, with zero ozone depletion potential and a global warming potential of 1. It has been ... -
Thermodynamic screening of alternative refrigerants for R290 and R600a
Elsevier (2020)Due to Regulation EU 517/2014 (F-Gas), the use of refrigerants with GWP higher than 150 was limited from 2015 on in small capacity refrigeration systems in Europe. Although refrigerants that dominate are R600a and R290 ... -
Thermoeconomic analysis of CO2 Ejector-Expansion Refrigeration Cycle (EERC) for low-temperature refrigeration in warm climates
Elsevier (2021-04)Refrigeration industry is adopting a proactive strategy to phase out fluorinated greenhouse gases by more sustainable working fluids. R744 is a natural refrigerant widely proposed for commercial refrigeration. Its use in ... -
Time, Cognition, and Approach: Sustainable Tourism Strategies for Abandoned Vernacular Landscapes
MDPI (2018)The main objective of the study is to challenge previous approaches to heritage, both in terms of management and conceptualization. It aims to highlight the importance and articulation of the different attributes in ... -
To Rehabilitate the Habitability. Scenario Simulation for Consolidated Urban Areas in Warm Regions
WSEAS (2017)Present research seeks to analyse the extent to which CO2 emissions can be diminished by means of different measures of energy efficiency simulated in a consolidated urban area on the Mediterranean coast. The study focuses ... -
Tools for assessing qualitatively the level of circularity of organisations: Applicability to different sectors
Elsevier (2023)The transition towards a circular economy (CE) has been identified as one of the biggest challenges for our society in general and for organisations in particular. In this context, organisations have begun to call for ... -
Toward Early and Objective Hand Osteoarthritis Detection by Using EMG during Grasps
MDPI (2023)The early and objective detection of hand pathologies is a field that still requires more research. One of the main signs of hand osteoarthritis (HOA) is joint degeneration, which causes loss of strength, among other ... -
Towards a Vector Field Based Approach to the Proper Generalized Decomposition (PGD)
MDPI (2021)A novel algorithm called the Proper Generalized Decomposition (PGD) is widely used by the engineering community to compute the solution of high dimensional problems. However, it is well-known that the bottleneck of its ... -
Towards Fish Welfare in the Presence of Robots: Zebrafish Case
MDPI (2024-05-31)Zebrafish (Danio rerio) have emerged as a valuable animal model for neurobehavioral research, particularly in the study of anxiety-related states. This article explores the use of conceptual models to investigate stress, ... -
Towards sustainable process heating at 250 °C: Modeling and optimization of an R1336mzz(Z) transcritical High-Temperature heat pump
Elsevier (2024-04-01)Fossil fuel boilers typically produce high-temperature process heating due to the impossibility of current renewable technologies. Vapour compression heat pump systems have been proposed up to 200 °C with subcritical cycles. ... -
Track–bridge interaction effects in the acceleration and displacement response of high-speed railway bridges: Simplified vs refined modelling
Elsevier (2024-06-08)The prediction of structural vibrations induced by high-speed trains is crucial for designing bridge structures, as well as for the assessment of the dynamic compatibility between bridges and rolling stock in large railway ... -
Transverse vibrations in existing railway bridges under resonant conditions: Single-track versus double-track configurations
Elsevier (2010)In this paper, the dynamic performance of a certain kind of existing bridge under the action of high-speed railway traffic is addressed. Short-to-medium-span simply supported structures are susceptible to experiencing ... -
Transverse vibrations in existing railway bridges under resonant conditions: Single-track versus double-track configurations
Elsevier (2010)In this paper, the dynamic performance of a certain kind of existing bridge under the action of high-speed railway traffic is addressed. Short-to-medium-span simply supported structures are susceptible to experiencing ... -
Tribological Analysis and Operation Issues of SiO2 Nanolubricants for MQL Machining Operations
Trans Tech Publications (2023-10)Minimum Quantity Lubrication (MQL) has been proved to be an efficient lubricant technique in machining that increases tool life, improves surface roughness, facilitates the recycling of the resulting chips, brings more ... -
Two FE models to analyse the dynamic response of short span simply-supported oblique high-speed railway bridges: Comparison and experimental validation
Elsevier (2018-07-15)In this paper the dynamic response of a particular type of high-speed railway bridge common in the Spanish railway system is analysed with the aim of evaluating the levels of vertical vibrations experienced at the platform. ... -
Ultimate capacity od rectangular concrete-filled steel tubular columns under unequal load eccentricities
Elsevier (2012-01)The paper describes 36 experimental tests conducted on rectangular and square tubular columns filled with normal and high strength concrete and subjected to a non-constant bending moment distribution with respect to the ... -
Ultra-high Strength Concrete on Eccentrically Loaded Slender Circular Concrete-filled Dual Steel Columns
Elsevier (2017)This paper presents an experimental study which was undertaken to investigate the effect of ultra-high strength concrete (UHSC) on the mechanical response of concrete-filled dual steel tubular columns (CFDST) subjected to ... -
Ultralow-temperature refrigeration systems: Configurations and refrigerants to reduce the environmental impact
Elsevier (2019-11-18)Several environmental protection policies have been enforced restricting working fluids with high global warming potential (GWP) values used in many types of refrigeration and heat pump systems. However, ultralow-temperature ... -
Understanding Forearm Muscle Activity during Everyday Common Grasps: Insights for Rehabilitation, Prosthetic Control, and Human–Machine Interaction
MDPI (2024-04-10)The specific role of forearm muscles in the development of activities of daily living (ADL) remains unknown. Consequently, studying forearm muscle activity during the most commonly used grasps in ADL would yield valuable ...