Thermal energy storage (TES) is achieved with widely different technologies. Depending on the specific technology, it allows excess thermal energy to be stored and used hours, days, months later, at scales ranging from the individual process, building, multiuser-building, district, town, or region. Usage examples are the balancing of energy demand between daytime and nighttime, storing summer heat for winter heating, or winter cold for summer air conditioning (Seasonal thermal energy storage). Storage media include water or ice-slush tanks, masses of native earth or bedrock accessed with heat exchangers by means of boreholes, deep aquifers contained between impermeable strata; shallow, lined pits filled with gravel and water and insulated at the top, as well as eutectic solutions and phase-change materials.
Other sources of thermal energy for storage include heat or cold produced with heat pumps from off-peak, lower cost electric power, a practice called peak shaving; heat from combined heat and power (CHP) power plants; heat produced by renewable electrical energy that exceeds grid demand and waste heat from industrial processes. Heat storage, both seasonal and short term, is considered an important means for cheaply balancing high shares of variable renewable electricity production and integration of electricity and heating sectors in energy systems almost or completely fed by renewable energy.
The different kinds of thermal energy storage can be divided into three separate categories: sensible heat, latent heat, and thermo-chemical heat storage. Each of these has different advantages and disadvantages that determine their applications.
Sensible heat storage (SHS) is the most straightforward method. It simply means the temperature of some medium is either increased or decreased. This type of storage is the most commercially available out of the three; other techniques are less developed.
The materials are generally inexpensive and safe.
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.
Explore les technologies de stockage d'énergie, leurs avantages, leurs applications et leurs aspects économiques dans les systèmes d'énergies renouvelables.
The students assess and compare all renewable energy resources, their real potentials, limitations and best applications (energy services). Solar thermal, solar electric, wood, bioliquids, biogas, hyd
Sur la base d'un cahier des charges, concevoir de manière interdisciplinaire un projet de structure, principalement en pierre de taille, esthétique et fonctionnel (abri thermique), faisant usage de pl
This course examines the supply of energy from various angles: available resources, how they can be combined or substituted, their private and social costs, whether they can meet the demand, and how t
Thermal energy storage (TES) is achieved with widely different technologies. Depending on the specific technology, it allows excess thermal energy to be stored and used hours, days, months later, at scales ranging from the individual process, building, multiuser-building, district, town, or region. Usage examples are the balancing of energy demand between daytime and nighttime, storing summer heat for winter heating, or winter cold for summer air conditioning (Seasonal thermal energy storage).
Une centrale solaire thermodynamique (ou centrale solaire thermique à concentration ou encore héliothermodynamique), en anglais CSP (pour concentrated solar power) est un site industriel qui concentre les rayons du Soleil à l'aide de miroirs afin de chauffer un fluide caloporteur, lequel sert en général à produire de l'électricité. Ce type de centrale permet, en stockant ce fluide dans un réservoir, de prolonger le fonctionnement de la centrale plusieurs heures au-delà du coucher du Soleil.
On appelle matériau à changement de phase, ou MCP, tout matériau capable de changer d'état physique dans une plage de température restreinte. Cette plage est située entre et environ. Dans cet intervalle de température, le changement de phase prépondérant reste la fusion/solidification. Ces températures sont accessibles naturellement et sont omniprésentes dans la vie quotidienne (température d'ambiance d'une maison, température d'un corps humain, de l'eau chaude sanitaire).
Energy storage is a central issue in the green economy with half the global end energy usage being heat. Latent heat thermal energy storage (LHTES) provides an energy dense heat storage solution with
EPFL2022
, , , , ,
Thermal energy storage via latent heat provides an energy dense solution and, during discharge, a hot stream at a well-defined temperature. Utilizing metal phase change materials (PCMs) and high-tempe
PERGAMON-ELSEVIER SCIENCE LTD2022
The present case study is multi-criteria performance analysis of EPFL’s heat pump for different working fluids. The heat pump is based on a 2-stage vapour compression cycle which is modelled using the