DENSITY CONTROLLED PHASE-CHANGING MATERIAL (PCM) SPHERES FOR INCREASED HEATING POWER AND OPTIMAL DELIVERY TEMPERATURE IN HOT-WATER TANKS

A medium for energy storage includes a plurality of capsules. Each capsule contains a phase changing material (PCM) configured to undergo a liquid-solid phase transition at a solidification temperature, TS. The PCM undergoes a relative volume change due to the phase transition. A shell is filled wit...

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Bibliographische Detailangaben
Hauptverfasser:	ASHER, WILLIAM E, LIU, XIAOLI, ZHANG, MINGKAN, RENDALL, JOSEPH D, ELATAR, AHMED F, AN, KEJU, NAWAZ, KASHIF, BRECHTL, JAMIESON, SUN, JIAN
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DOMESTIC HOT-WATER SUPPLY SYSTEMS DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATINGSYSTEMS ELEMENTS OR COMPONENTS THEREFOR HEATING LIGHTING MECHANICAL ENGINEERING RANGES VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	A medium for energy storage includes a plurality of capsules. Each capsule contains a phase changing material (PCM) configured to undergo a liquid-solid phase transition at a solidification temperature, TS. The PCM undergoes a relative volume change due to the phase transition. A shell is filled with the PCM. The shell contains a first heat-conducting material, and is configured to comply to the relative volume change. The relative volume change is configured to cause a buoyancy force, which acts on the capsule when the capsule is disposed in water at a water temperature, TW, to be larger than the capsule's weight for Tw>Ts, and equal to or smaller than the capsule's weight for Tw