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Title: Encapsulation of thermal energy storage media

Abstract

In one embodiment, a method for fabricating a ceramic phase change material capsule includes forming a hollow ceramic capsule body having a filling hole, filling the ceramic capsule body with one or more phase change materials via the filling hole, and closing and sealing the filling hole.

Inventors:
; ; ;
Publication Date:
Research Org.:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1418987
Patent Number(s):
9,879,166
Application Number:
14/741,427
Assignee:
University of South Florida (Tampa, FL) ARPA-E
DOE Contract Number:
AR0000179
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Jun 16
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Citation Formats

Goswami, Dharendra Yogi, Stefanakos, Elias K., Jotshi, Chand K., and Dhau, Jaspreet. Encapsulation of thermal energy storage media. United States: N. p., 2018. Web.
Goswami, Dharendra Yogi, Stefanakos, Elias K., Jotshi, Chand K., & Dhau, Jaspreet. Encapsulation of thermal energy storage media. United States.
Goswami, Dharendra Yogi, Stefanakos, Elias K., Jotshi, Chand K., and Dhau, Jaspreet. 2018. "Encapsulation of thermal energy storage media". United States. doi:. https://www.osti.gov/servlets/purl/1418987.
@article{osti_1418987,
title = {Encapsulation of thermal energy storage media},
author = {Goswami, Dharendra Yogi and Stefanakos, Elias K. and Jotshi, Chand K. and Dhau, Jaspreet},
abstractNote = {In one embodiment, a method for fabricating a ceramic phase change material capsule includes forming a hollow ceramic capsule body having a filling hole, filling the ceramic capsule body with one or more phase change materials via the filling hole, and closing and sealing the filling hole.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2018,
month = 1
}

Patent:

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  • In one embodiment, a phase change material is encapsulated by forming a phase change material pellet, coating the pellet with flexible material, heating the coated pellet to melt the phase change material, wherein the phase change materials expands and air within the pellet diffuses out through the flexible material, and cooling the coated pellet to solidify the phase change material.
  • A holdover plate is described for thermal energy storage in refrigeration and air conditioning systems, the holdover plate comprising: a heat exchanger with an adjacent space in close proximity thereto; a plurality of expandable capsules containing a thermal energy storage medium, the capsules substantially filling the adjacent space and the capsules including means to provide for expansion of the thermal energy storage medium without altering outer envelope dimensions of the capsules; a containment means forming an exterior of the holdover plate and surrounding the heat exchanger and the adjacent space filled with the capsules, the containment means further containing amore » convective coupling fluid which thermally couples and is non-corrosive to the heat exchanger, the capsules, and the containment means; and wherein the convective coupling fluid transfers heat primarily through natural convection and conduction and does not freeze at operational temperatures of the heat exchanger.« less
  • A high-temperature direct-contact thermal energy storage element for use in a system for storage and retrieval of thermal energy in the range of about 400/sup 0/ to about 2000/sup 0/ F. The thermal energy is directly stored, without heat exchange tubes in composite latent/sensible heat thermal energy storage media utilizing the heat of fusion and high-temperature stability of alkaline metal and alkaline earth carbonates, chlorides, nitrates, nitrites, fluorides, hydroxides, sulfates, and mixtures thereof maintained within a porous support-structure material which itself is capable of storage as sensible heat. The thermal energy storage according to the invention may be effectively utilizedmore » for storage of thermal energy derived from solar, industrial waste, process heat, and high-temperature gas reactor energy sources and retrieved for a wide variety of uses such as combustion air preheating, drying, space heating, heating of process gases, and the like.« less
  • A high-temperature direct-contact thermal energy storage element for use in a system for storage and retrieval of thermal energy in the range of about 400/sup 0/ to about 3000/sup 0/ F. The thermal energy is directly stored, without heat exchange tubes in composite latent/sensible heat thermal energy storage media utilizing the heat of fusion and high-temperature stability of alkaline metal and alkaline earth carbonates, chlorides, nitrates, nitrites, fluorides, hydroxides and sulfates and metal, metallic alloys and mixtures thereof maintained within a porous support-structure material which itself is capable of storage as sensible heat. The thermal energy storage according to themore » invention may be effectively utilized for storage of thermal energy derived from solar, industrial waste, process heat, and high-temperature gas reactor energy sources and retrieved for a wide variety of uses such as combustion air preheating, drying, space heating, heating of process gases, power generating heat engines and the like.« less
  • Thermal energy storage apparatus, controllers and thermal energy storage control methods are described. According to one aspect, a thermal energy storage apparatus controller includes processing circuitry configured to access first information which is indicative of surpluses and deficiencies of electrical energy upon an electrical power system at a plurality of moments in time, access second information which is indicative of temperature of a thermal energy storage medium at a plurality of moments in time, and use the first and second information to control an amount of electrical energy which is utilized by a heating element to heat the thermal energymore » storage medium at a plurality of moments in time.« less