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Advances in Thermal Energy Storage Systems: Methods and by Luisa F. Cabeza

By Luisa F. Cabeza

Thermal power garage (TES) applied sciences shop thermal power (both warmth and chilly) for later use as required, instead of on the time of creation. they're as a result very important opposite numbers to numerous intermittent renewable strength iteration tools and in addition supply a fashion of valorising waste procedure warmth and lowering the strength call for of constructions. This publication offers an authoritative evaluation of this key quarter. half one reports brilliant warmth garage applied sciences. half covers latent and thermochemical warmth garage respectively. the ultimate part addresses functions in heating and effort systems.

  • Reviews good warmth garage applied sciences, together with using water, molten salts, concrete and boreholes
  • Describes latent warmth garage structures and thermochemical warmth storage
  • Includes info at the tracking and regulate of thermal power garage structures, and considers their functions in residential structures, energy vegetation and industry

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Extra info for Advances in Thermal Energy Storage Systems: Methods and Applications

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7 Comparison of different storage technologies for solar space heating and hot water production applications Sensible heat storage Water Rock Latent heat thermal storage material (PCM) Comparison between different heat storage media Operating temperature range Limited (0–100°C) Large Large, depending on the choice of the material Specific heat High Low Medium Thermal conductivity Low convection effects improve the heat transfer rate Low Very low, insulating properties Thermal storage Low capacity per unit mass and volume for small temperature differences Low High Stability to thermal cycling Good Good Insufficient data Availability Overall Almost overall Dependent on the choice of material Cost Inexpensive Inexpensive Expensive Comparison of heat transfer properties and life of different types of thermal storage Required heat exchanger geometry Simple Simple Complex Temperature gradients during charging and discharging Large Large Small Thermal stratification effect Existent works positively Existent works positively Generally nonexistent with proper choice of material Simultaneous charging and discharging Possible Not possible Possible with appropriate selection of heat exchanger Integration with solar heating/cooling systems Direct integration with water systems Direct integration Indirect integration with air systems Costs for pumps, fans, etc.

1 Water density as a function of temperature. 2 Kinematic viscosity of water as a function of temperature. 3 Thermal conductivity of water as a function of temperature. 4 Specific heat of water as a function of temperature. 76 [kg/m3]. 747 · 10–2 · T ) [m2/s]. 46 [W/mK]. 2 ·10–4 · T2 [J/kgK]. 8396. 9114) · 10–4 [K–1]. 1), hot water will rise upwards and cold water move downwards in the hot water store. An appropriate hot water store design can therefore create large temperature differences in a hot water store.

The thermal load reduction refers to the reduction of capacity from that which would have been consumed under the same working conditions without employing 20 Advances in Thermal Energy Storage Systems any type of energy storage. The energy savings simply refer to the ‘heat’ or ‘cold’ that is stored and may be reutilized, thus not needing to be generated ‘again’ by the application. The CO2 emissions reduction is that achieved as a result of reusing stored energy, therefore not consuming fossil fuels or other greenhouse gas emitting energy sources during energy generation and thus preventing emissions from going into the atmosphere.

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