Polyol-charakteristisches Energiespeichermaterial
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This article presents a focused overview of advancements in the field of polyol synthesis of metal, metal oxide nanoparticles and nanocomposites, specifically those reported in the current decade.
Are polyols a PCM for thermal energy storage?
Polyols; of some also known as sugar alcohols, are an emerging PCM category for thermal energy storage (TES). A review on polyols as PCM for TES shows that polyols have phase change temperatures in the range of −15 to 245 °C, and considerable phase change enthalpies of 100–413 kJ/kg.
Are polyols a phase change material for thermal energy storage?
Also, the overall thermal energy storage capacity of the PCM (polyols in this case) over the temperature range T1–T2can be determined employing Eq. (13). 3. Polyols as phase change materials for thermal energy storage
Are polyols suitable PCM for TES design?
A review on polyols as PCM for TES shows that polyols have phase change temperatures in the range of −15 to 245 °C, and considerable phase change enthalpies of 100–413 kJ/kg. However, the knowledge on the thermo-physical properties of polyols as desirable PCM for TES design is presently sparse and rather inconsistent.
Do polyols have a phase change enthalpy?
This is mainly owing to their rather moderate phase change temperatures found between around −15 to 245 °C, and the enthalpies in the range of 100–413 kJ/kg. Several polyols have phase change enthalpies that can compete with even ice, which indeed is an advantage.
What is a PCM interest in polyols?
A growing PCM interest in polyols is evident at present with for instance, patents on pure and blends of polyols for TES and polyol mixtures with some salts , plus literature on the evaluation of various mixtures/composites: Mannitol–fatty acid esters , Erythritol–porous materials , and Polyethylene glycol–sugar .
What is the melting enthalpy of polyols?
In overall, as evident from all the polyols found with thermal properties, a wide range of melting points of between −15 and 245 °C, and melting enthalpies between around 100 and 413 kJ/kg (considering the lowest and the highest values reported) can be obtained.