Coupled Cooling Method and Application of Latent Heat Thermal Energy Storage Combined with Pre-cooling of Envelope: Optimization of Pre-cooling with Intermittent Mode
The coupled cooling method combining latent heat thermal energy storage and pre-cooling of the envelope (PE) is a new free-cooling method that is suitable for exposure to high temperatures and other types of harsh environments. PE plays the most critical role in the coupled cooling method. Long-term, continuous PE cannot only reduce energy storage capacity, but it also causes numerous energy waste. Thus, an intermittent operational mode is firstly proposed to improve the heat transfer performance and reduce energy consumption. A simplified numerical model of intermittent thermal storage is established, and the subsequent effects of intermittent ratio (IR) and intermittent period (IP) on cold storage performance have been systematically investigated. Furthermore, the operational period is divided into a cold storage period (CSP) and a cold preservation period (CPP), each with their own respective evaluation indices. Long-term intermittent PE is optimized, and an interchanging continuous/intermittent cold storage strategy is proposed. Under the current operating conditions, as compared with the conventional continuous mode, the duration of CSP is extended by 0–26%, yielding an annual cold storage energy consumption reduction of 68–78%. Thus, the current study demonstrates the significant potential of intermittent operational mode application in underground thermal energy storage systems.
Item Type | Article |
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Uncontrolled Keywords | Cavern envelope; Intermittent operation; Mine refuge chamber; Optimization; Thermal energy storage; Underground space |
Subjects |
Engineering(all) > Civil and Structural Engineering Social Sciences(all) > Geography, Planning and Development Energy(all) > Renewable Energy, Sustainability and the Environment Social Sciences(all) > Transportation |
Date Deposited | 26 Jul 2024 21:13 |
Last Modified | 26 Jul 2024 21:13 |
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- School of Engineering and Technology
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- Centre for Engineering Research
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