Exploring the feasibility of pumped hydroelectric energy storage (PHES) using seawater in South Africa

探索南非利用海水抽水蓄能（PHES）的可行性

• 批准号: 10048467
• 金额: $ 26.72万
• 依托单位: AFRICA NEW ENERGIES LIMITED
• 依托单位国家: 英国
• 项目类别: Feasibility Studies
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=10048467
• 关键词: Exploring; feasibility; pumped; hydroelectric; energy

South Africa is currently facing its biggest ever power crisis with many parts of the country facing rolling blackouts of up to 6-hours/day due to an inability to consistently meet demand which results in daily load shedding. This is severely impacting businesses and households, limiting economic growth and further deepening an unemployment crisis, currently at a staggering 34.5%.In response, South Africa's government has committed to transforming the Energy Sector. A key part of this goal is centered around Renewable Energy investment and a move away from coal which currently accounts for 70% of energy supply, with a target of 17800 MW of electricity to be derived from renewables by 2030\. However, for this to be achieved it needs to be accompanied by an effective means of energy storage.This project aims to address this current barrier through the initial development of a 11 GWh pumped hydroelectric energy storage (PHES) using seawater as the storage medium, with the potential to be scaled further. Although seawater PHES is not new, it has not been attempted at large-scale with key challenges (e.g., saltwater corrosion, biofouling, impact on marine life) to be addressed. However, with the acceleration of renewable-investment programmes and increasing demand on freshwater reserves, a number of seawater projects are currently being considered in other locations including Australia and Chile.Replicating the same set-up of freshwater PHES (energy storage achieved by pumping water to an upper reservoir when energy is abundant and then generate electricity during peak times by releasing the water to the lower reservoir in this case the sea, therefore reducing capital cost) but with planned innovations in filtration techniques, dam lining and through the use of floating solar panels to reduce evaporation, the UK-based Africa New Energies (ANE) Limited, seek to overcome legacy challenges to offer a solution that can increase and further demonstrate the viability of seawater-PHES globally.Successful outcomes from this 9-month feasibility study will give confidence to move into detailed design and financing. Once operational from 2025, the proposed solution will deliver significant socio-economic and environmental impacts across South Africa including:* Support the case for Renewable-Energy investment as the country seeks to move from its coal dependency.* New employment opportunities.* Provide greater grid stability.* Improve security of supply and affordability.* Reduce the need for freshwater use in a country recognised for its aridity.* Annual CO2 savings of 1.96 million tonnes.* Replicable knowledge and model.

南非目前正面临其有史以来最大的电力危机，该国许多地区面临着每天6小时的滚动停电，因为无法始终如一地满足需求，从而导致每日减轻负担。这严重影响了企业和家庭，限制了经济增长并进一步加深了失业危机，目前以惊人的34.5％。在反应中，南非政府致力于改变能源部门。该目标的一个关键部分是围绕可再生能源投资，并远离煤炭，该煤炭目前占能源供应的70％，目标是17800兆瓦的电力，将于2030年的可再生能源衍生而来。但是，为了实现这一目标，需要伴随有效的储能手段。本项目旨在通过使用海水作为存储介质的最初开发11 GWH泵送的水力发电储存（PHE）来解决此当前障碍，并有可能进一步扩展。尽管海水phes并不是什么新鲜事物，但尚未在大规模挑战（例如，盐水腐蚀，生物污染，对海洋生物的影响）进行大规模尝试。然而，随着可再生投资计划的加速以及对淡水储量的需求的增加，目前正在包括澳大利亚和智利在内的其他地方考虑许多海水项目。复制相同的淡水phes设置（通过将水泵送到能量在较低的水量中，通过在较低的水位中泵送到较低的水分，可以使水在高峰时期降低，从而使水迅速降低了，从而使水的速度降低了，从而使水的速度降低了，从而使水的速度降低了，从而使水的速度降低了，从而使水的速度降低了。成本），但随着过滤技术，大坝衬里的计划创新，以及通过使用浮动太阳能电池板来减少蒸发，英国的非洲新能量（ANE）有限，试图克服遗产挑战，以提供一种解决方案，以提高和进一步证明全球范围的可行性，从而使该范围的范围远离了9毫秒的范围，从而使菲斯特（Successuccessuccessuccessuccessuccessuccessuccessuccessuccessuccessuccessuccessuccessuccessucces）详细介绍了详细的范围，从而使填充范围内的范围能够融合。一旦从2025年开始运营，该提议的解决方案将在整个南非产生重大的社会经济和环境影响，包括：*支持可再生能源投资的案例，因为该国试图从其煤炭依赖中转移。*新的就业机会。可复制的知识和模型。