Search results for " Heating"
showing 10 items of 150 documents
Sub-Structuring Dynamics and Heating in Dense Coronal Structures
2005
Dense coronal plasma is confined in magnetic loops, the building blocks of the bright X-ray corona. We overview recent findings from the analysis of confined coronal plasma observed with SoHO and TRACE and its interpretation. Internal substructuring, mass transport and dynamics, and heating processes are discussed.
Promoting the Flexibility of Thermal Prosumers Equipped with Heat Pumps to Support Power Grid Management
2023
The increasing share of renewable energy sources in energy systems will lead to unpredictable moments of surplus/deficit in energy production. To address this issue, users with heat pumps can provide support to power grid operators through flexible unit operation achieved via Demand Response programs. For buildings connected to low-temperature heating networks with ensured third-party access, further room for flexibility can be explored by investigating the production of surplus heat that can be sold to the network. A key aspect lies in the identification of the energy pricing options that could encourage such flexible operation of a heat pump by “thermal prosumers”. To this aim…
Impact of processing conditions on functionality of powders prepared from mixed protein system
2020
International audience; The projection of a global human population of around 9.5 billion by 2050 indicates that the demand for animal protein will double during this period. It seems therefore essential in regard to sustainability and food security to search for alternative protein sources that show nutritional and functional quality close to animal protein ones. In that respect, there is a growing interest in utilizing plant proteins as partial replacers of animal proteins in food. The reintroduction of plant proteins into our diet is a solution already envisaged by some vegetarian or flexitarian diets. In order to broaden this practice, one strategy is the use of protein mixes as an ingr…
Internal heat gain from different light sources in the building lighting systems
2017
EU directives and the Construction Law have for some time required investors to report the energy consumption of buildings, and this has indeed caused low energy consumption buildings to proliferate. Of particular interest, internal heat gains from installed lighting affect the final energy consumption for heating of both public and residential buildings. This article presents the results of analyses of the electricity consumption and the luminous flux and the heat flux emitted by different types of light sources used in buildings. Incandescent light, halogen, compact fluorescent bulbs, and LED bulbs from various manufacturers were individually placed in a closed and isolated chamber, and t…
Influence of axial mirror ratios on the kinetic instability threshold in electron cyclotron resonance ion source plasma
2022
International audience; Electron Cyclotron Resonance (ECR) ion source plasmas are prone to kinetic instabilities. The onset of the instabilities manifests as emission of microwaves, bursts of electrons expelled from the plasma volume, and the collapse of the extracted highly charged ion (HCI) currents. Consequently, the instabilities limit the HCI performance of ECR ion sources by limiting the parameter space available for ion source optimization. Previous studies have shown that the transition from stable to unstable plasma regime is strongly influenced by the magnetic field structure, especially the minimum field value inside the magnetic trap (Bmin). This work focuses to study the role o…
Influence of greenhouse volume ratio on soil solarization efficiency
2007
In Vitro Study on Bone Heating during Drilling of the Implant Site: Material, Design and Wear of the Surgical Drill
2020
Objective: An in vitro study was made to compare mean thermal variation according to the material, design and wear of the surgical drills used during dental implant site preparation. Material and methods: Three study groups (stainless steel drills with straight blades
Quasi-periodical kinetic instabilities in minimum-B confined plasma
2022
We present the results of an experimental investigation of quasi-periodical kinetic instabilities exhibited by magnetically confined electron cyclotron resonance heated plasmas. The instabilities were detected by measuring plasma microwave emission, electron losses, and wall bremsstrahlung. The instabilities were found to be grouped into fast sequences of periodic plasma losses, separated by ∼100 µs between the bursts, followed by 1–10 ms quiescent periods before the next event. Increasing the plasma energy content by adjusting the plasma heating parameters, in particular the magnetic field strength, makes the instabilities more chaotic in the time domain. Statistical analysis reveals that …
The use of in-line quantitative analysis to follow polymer processing
2009
In this work it is presented three applications of real time analysis during extrusion process using an optical device developed by our research group, which applies the concepts of light extinction. Monitoring of polymer blends morphology takes place to infer data concerned to dispersed phase size and concentration. The detector also enables information about melting temperature of polymer during extrusion and the level of viscous heating, and the exfoliation step during processing of a polymer-clay nanocomposite.
LIFE CYCLE ASSESSMENT EXPERIENCES FOR SOLAR HEATING AND COOLING SYSTEMS
2018
Solar heating and cooling systems can significantly contribute to the energy and climate European goals. A complete assessment of this contribution needs the analysis of these systems from a life-cycle perspective, in order to estimate the energy and environmental costs of their manufacturing and end-of-life, and to compare these costs with the benefits obtained during operation. A well-established methodology to fulfil this task is the Life Cycle Assessment (LCA). The paper describes some LCA experiences of solar heating and cooling systems, developed within the Task 53 “New generation solar cooling & heating systems (PV or solar thermally driven systems)” of the International Energy A…