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首页> 外文期刊>Journal of Energy Storage >Ultra-high temperature thermal energy storage. part 1: concepts
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Ultra-high temperature thermal energy storage. part 1: concepts

机译：超高温储热。第1部分：概念

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摘要

Renewable energy sourced from the sun, wind, waves or tides is clean and secure. Unfortunately, the energy that can be extracted from renewables and the demand for it varies both temporally and spatially. Therefore, energy storage is required to match generation with use. To date grid-scale energy storage has been limited by low energy densities, long-term performance degradation, low round-trip efficiencies or limited deployment locations. Although thermal storage has found uses these have been restricted to lower temperatures by thermal losses resulting in low energy densities and uneconomical electricity generation efficiency. In this paper an ultra-high temperature (1800 K) storage system is proposed where heat losses are minimised and recovered to make a higher storage temperature attractive, thus unlocking greater energy densities and efficiencies. Radiation dominates heat losses at ultra-high temperatures but can be minimised through the design of the storage medium container. However, even after energy is lost from storage, heat pumps in the store and charge cycles in addition to preheating during the extraction cycle can be used to recover a significant amount of heat. Collectively loss reduction and recovery techniques can lead to a storage system with a performance and utility that exceeds other energy storage methods Here the feasibility of the novel storage technique is demonstrated through thermodynamic and thermal analysis in each of the three key states of operation: charge, store and generation.
机译：来自太阳，风，海浪或潮汐的可再生能源是干净安全的。不幸的是，可从可再生能源中提取的能量及其需求在时间和空间上都会变化。因此，需要能量存储以使发电与使用相匹配。迄今为止，网格规模的能量存储受到能量密度低，长期性能下降，往返效率低或部署位置有限的限制。尽管已经发现了热存储的用途，但是由于热损失，这些已被限制在较低的温度下，从而导致较低的能量密度和不经济的发电效率。在本文中，提出了一种超高温（1800 K）存储系统，该系统将热量损失降至最低并加以回收，从而使较高的存储温度具有吸引力，从而释放出更大的能量密度和效率。在超高温下，辐射是热损失的主要来源，但可以通过存储介质容器的设计将其最小化。但是，即使在能量从存储中损失之后，除了提取循环中的预热外，存储中的热泵和充电循环都可以用来回收大量的热量。集体减少和恢复损失的技术可以使存储系统的性能和实用性超过其他能量存储方法。在这里，通过热力学和热分析在三种关键操作状态中的每一种下，都可以证明这种新颖存储技术的可行性。存储和生成。

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