Search results for "efficiency"
showing 10 items of 1430 documents
Full-scale validation of bio-recycled asphalt mixtures for road pavements
2019
Abstract Recycling of asphalt has become a well-established practice in many countries, however the road pavement industry remains a bulk consumer of extracted raw materials. Novel solutions that find root in circular economy concepts and life-cycle approaches are needed in order to enable optimisation of infrastructure resource efficiency, starting from the design stage and spanning the whole value chain in the construction sector. Itis within this framework that the present study presents a full-scale validation of asphalt mixtures specifically designed to ensure durability of flexible road pavements and at the same time enabling the reuse of reclaimed asphalt pavement (RAP) through the i…
Cascaded H-Bridges Multilevel Inverter Drive: Active Power Analysis in Frequency Domain
2022
The international standard IEC 61800-9-2 introduces energy efficiency classification for frequency converters or complete drive module (CDM) and provides instrumentation minimum requirements for accurate measurement of CDM input and output power valid for conventional pulse-width-modulated (PWM) voltage source inverter (VSI). This paper highlights the necessary improvements to update the standard with more detailed prescriptions according to the converter topologies and the modulation techniques adopted. In this framework, this paper address the power analysis in the frequency domain of a cascaded H-bridges-multilevel inverter (CHBMI) in an interior permanent magnet synchronous motor (IPMSM…
Experimental Evaluation of Dead-Time Impacts on the Efficiency and THD for a Three-Phase Five-Level Cascaded H-Bridge Inverter
2022
Cascaded H-Bridges Multilevel Inverter (CHBMI) is a fascinating solution for optimization purposes in several application fields. The CHBMI performance optimization can be reached both with hardware and software solutions. In detail, the CHBMI performances are a function of the modulation strategy adopted and its parameters such as modulation index, switching frequency, and dead time. This paper presents performance experimental analysis on dead time effects on CHBMI performance in terms of harmonic distortion and conversion efficiency. In this analysis, two different modulation strategies have been considered and implemented. The paper focuses on modulation strategies implemented, the test…
ENERGY RECOVERY FROM REGASIFICATION OF LNG
2012
The international forecasts on energy consumption in the next future show an increasing trend due also to growing markets, and among this the leading emerging economies connected to BRICS countries (Brazil, Russia, India, China and South Africa). We need more and more energy. On the other side the environmental problem is arising and the climate change is a more and more pressing emergency. The latest environmental disasters, as the oil spill in the Gulf of Mexico in 2010 and the earthquake with the following tsunami in Japan in 2011, struck the public opinion and so, as in many European countries, the nuclear program is under a deep revision or even stopped. So it is necessary to utilize a…
Electrical energy analysis and potential environmental improvements of sheet metal punching processes
2013
Discrete part manufacturing processes, in particular non-conventional production processes, are still poorly documented in terms of environmental footprint. Within the separating processes, sheet metal punching processes have not been analyzed yet from environmental point of view. The present paper aims to contribute to filling this knowledge gap. In particular, two different punching machine tool architectures were analyzed. Following the previously developed CO2PE methodological approach, power studies and a preliminary time study have been performed in order to understand the contribution of each sub-unit towards the total energy demand. The influence of the most relevant process paramet…
Reducing energy consumptions and CO2 emissions in European countries: a review on legal environment and increasing use of photovoltaic energy for Ele…
2010
In Europe, the building sector is ranked second in terms of CO2 emissions, just after transport. Particularly, it accounts for 25% of the overall CO2 emissions. Moreover, in order to reduce CO2 emissions, European legislations encourage the use of renewable energies and, among them, particularly the use of PhotoVoltaic (PV) one. This because the connection between the use of PV clean energy and the reduction of CO2 emission is well demonstrated. In this context, the first part of the paper is focused on the regulations related to building energy efficiency while the second part investigates the deployment of PV source all over Europe.
EFFICIENCY AND JUSTICE IN EUROPEAN CONTRACT LAW
2008
Abstract: In the last century, refl ections on contract law have been almost entirely dominated by classical contract theory and laissez–faire ideology, while open considerations of effi ciency and justice have played a marginal role. The rise of European contract law has gradually led to the abandonment of traditional arguments typical of national private laws and has sparked a growing debate on effi ciency and justice. This trend does not always contribute to the quality of the debate, as it is often ideologically polarized between ‘right wing’ arguments pleading in favour of marketoriented polices and ‘left wing’ arguments in support of consumers’ rights, both proposing solutions inspir…
A comparative study on campus sustainability in higher education sector in Hong Kong and Finland
2015
This thesis presents a comparative study examining the practices of campus sustainability in Higher Education Sectors between Hong Kong and Finland. Campus sustainability is a trend during the last decade as a result of numerous declarations and meetings for sustainable development in Higher education all over the world. In this thesis, the investigated areas are focused on environmental sustainability and Social sustainability. This study used the content analysis method to analyze public available documents from the selected fifteen Higher education institutions in Hong Kong and Finland. The first stage was a description of the current overall situations of campus sustainability in the tw…
Lactate-induced inhibition of tumor cell proliferation.
1988
Abstract Culture medium that was recovered from tumor cell or fibroblast cultures during the plateau phase, and that was replenished by addition of glucose, glutamine, and serum and readjustment of pH had a distinct growth-inhibiting effect on monolayer cell cultures. The effect, which was not specific for a given cell strain, may be partially responsible for the "density inhibition" commonly observed in malignant cells grown in monolayer cultures. By modifying fresh growth media, it was shown that the growth inhibition observed can be partly attributed to the accumulation of lactate in the culture medium of plateau phase cells. This substance reduced the plating efficiency and the number o…
Robust Antigen-Specific T Cell Activation within Injectable 3D Synthetic Nanovaccine Depots
2021
Contains fulltext : 244693.pdf (Publisher’s version ) (Open Access) Synthetic cancer vaccines may boost anticancer immune responses by co-delivering tumor antigens and adjuvants to dendritic cells (DCs). The accessibility of cancer vaccines to DCs and thereby the delivery efficiency of antigenic material greatly depends on the vaccine platform that is used. Three-dimensional scaffolds have been developed to deliver antigens and adjuvants locally in an immunostimulatory environment to DCs to enable sustained availability. However, current systems have little control over the release profiles of the cargo that is incorporated and are often characterized by an initial high-burst release. Here,…