2022
DOI: 10.5098/hmt.19.1
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An Ultimate Solution to Phasing Out Fossil Fuels - Part I: Utility-Scale Underground Hot-Water Storage (Usuhws) for Power Production and Heat Supply

Abstract: This paper introduces utility-scale underground hot water storage (USUHWS) systems and evaluates their performance to enable renewable energy sources to produce dispatchable utility-scale power or supply heat with minimized interruption and impact by weather conditions. The USUHWS systems could retain the thermal energy content of the stored hot water for years so that renewable energy can be extracted and stored at any time year-round and be used whenever needed. Another major objective of this paper is to in… Show more

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Cited by 3 publications
(1 citation statement)
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“…Thermal power plants that could enable the use of the vast amount of thermal energy resources at low or medium temperatures to generate electricity could have a significant impact on the advancement of renewable energy. Cao (2022a) demonstrated the concept of utilityscale underground hot-water storage facilities in conjunction with thermal power plants, which could have the potential to displace more than 80% of the global fossil fuel being used today. However, economic feasibility of the storage systems is very sensitive to their temperature and pressure, and a favorable temperature range was shown to be near or slightly above 100 o C, more specifically in the low-mid temperature range between 90 to 150 o C. If the water temperature is significantly above this range, the costs of the hot-water storage system could increase exponentially.…”
Section: Introductionmentioning
confidence: 99%
“…Thermal power plants that could enable the use of the vast amount of thermal energy resources at low or medium temperatures to generate electricity could have a significant impact on the advancement of renewable energy. Cao (2022a) demonstrated the concept of utilityscale underground hot-water storage facilities in conjunction with thermal power plants, which could have the potential to displace more than 80% of the global fossil fuel being used today. However, economic feasibility of the storage systems is very sensitive to their temperature and pressure, and a favorable temperature range was shown to be near or slightly above 100 o C, more specifically in the low-mid temperature range between 90 to 150 o C. If the water temperature is significantly above this range, the costs of the hot-water storage system could increase exponentially.…”
Section: Introductionmentioning
confidence: 99%