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Title: Gas hydrate cool storage system

Abstract

The invention presented relates to the development of a process utilizing a gas hydrate as a cool storage medium for alleviating electric load demands during peak usage periods. Several objectives of the invention are mentioned concerning the formation of the gas hydrate as storage material in a thermal energy storage system within a heat pump cycle system. The gas hydrate was formed using a refrigerant in water and an example with R-12 refrigerant is included. (BCS)

Inventors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
5697078
Application Number:
ON: DE85011589
Assignee:
Dept of Energy EDB-85-112878
DOE Contract Number:
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; COLD STORAGE; GAS HYDRATES; HEAT PUMPS; CLATHRATES; INVENTIONS; OFF-PEAK ENERGY STORAGE; REFRIGERANTS; THERMAL ENERGY STORAGE EQUIPMENT; WATER; ENERGY STORAGE; EQUIPMENT; FLUIDS; HYDRATES; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; STORAGE; WORKING FLUIDS; 250600* - Energy Storage- Thermal; 320100 - Energy Conservation, Consumption, & Utilization- Buildings

Citation Formats

Ternes, M.P., and Kedl, R.J. Gas hydrate cool storage system. United States: N. p., 1984. Web.
Ternes, M.P., & Kedl, R.J. Gas hydrate cool storage system. United States.
Ternes, M.P., and Kedl, R.J. 1984. "Gas hydrate cool storage system". United States. doi:.
@article{osti_5697078,
title = {Gas hydrate cool storage system},
author = {Ternes, M.P. and Kedl, R.J.},
abstractNote = {The invention presented relates to the development of a process utilizing a gas hydrate as a cool storage medium for alleviating electric load demands during peak usage periods. Several objectives of the invention are mentioned concerning the formation of the gas hydrate as storage material in a thermal energy storage system within a heat pump cycle system. The gas hydrate was formed using a refrigerant in water and an example with R-12 refrigerant is included. (BCS)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1984,
month = 9
}
  • This invention is a process for formation of a gas hydrate to be used as a cool storage medium using a refrigerant in water. Mixing of the immiscible refrigerant and water is effected by addition of a surfactant and agitation. The difficult problem of subcooling during the process is overcome by using the surfactant and agitation and performance of the process significantly improves and approaches ideal.
  • This invention is a process for formation of a gas hydrate to be used as a cool storage medium using a refrigerant in water. Mixing of the immiscible refrigerant and water is effected by addition of a surfactant and agitation. The difficult problem of subcooling during the process is overcome by using the surfactant and agitation and performance of the process significantly improves and approaches ideal.
  • A metal--halogen--hydrate electrical energy system having two fluid flow loops operating in parallel driven from the same pump is described. 3 figures.
  • This report describes an investigation of a latent cool storage system which employs a refrigerant gas hydrate as the storage medium. A refrigerant gas hydrate is a compound consisting of a refrigerant gas molecule contained within a crystalline water molecule cage. In this system, the storage component is incorporated directly into the refrigeration cycle, replacing the conventional evaporator. The refrigerant is used not only to form the gas hydrate, but also as a direct contact heat exchange fluid to remove heat from the storage tank. In this investigation, only the charging phase of the process was examined; that is, onlymore » the characteristics of the formation of gas hydrate were studied. The results of the tests showed that liquid refrigerant must be dispersed throughout the water in the storage tank during charging to obtain acceptable performance.« less
  • A cool storage system using a refrigerant gas hydrate as the storage medium and being direct-contact charged, direct-contact discharged is under development at Oak Ridge National Laboratory. A test facility has been built and was operated without any problem during either the charging or the discharging process. Some of the tests performed are described. At present, only refrigerant-12 has been used. Future plans include the use of other low-pressure refrigerants or mixtures of refrigerants that also form hydrates in order to reduce the total pressure in the system. A full-scale cool storage system is under design.