Sadly this seems to be a lot of waffle. Surely there are some concrete proposals they could share.
And I do hope the grid is going to get the investment to enable consumers to fill batteries off peak.

https://www.gov.uk/government/news/families-to-save-in-biggest-home-upgrade-plan-in-british-history

#renewables
#pv
#solar
#EnergyStorage
#energy_storage
#heatPumps
#heat_pumps

Families to save in biggest home upgrade plan in British history

Government launches Warm Homes Plan to upgrade the nation's homes, help families cut their energy bills, and tackle fuel poverty.

GOV.UK
CO2 Batteries That Store Grid Energy Take Off Globally

Google is betting big on CO2 batteries to power its data centers with clean energy.

IEEE Spectrum
CO2 Batteries That Store Grid Energy Take Off Globally

Google is betting big on CO2 batteries to power its data centers with clean energy.

IEEE Spectrum

Concrete spheres for energy storage; California plans a 9-meter diameter sphere | Hacker News

LinkConcrete spheres for energy storage; California plans a 9-meter diameter sphere
https://farmingdale-observer.com

📌 Summary:
本篇文章介紹了一項由德國 Fraunhofer IEE 研究團隊提出的創新能源儲存方案——利用安置於海底的空心混凝土球體儲存電能,該計畫命名為 StEnSea(Stored Energy in the Sea)。其原理是利用過剩電力將球體內的水抽出,形成相對真空,當需要釋放能量時,海水因外壓壓力湧入球體,驅動渦輪機發電。此技術相較於傳統水力發電站,因為設置於深海,佔用空間大且對環境影響小,且遠離人口密集區,社會接受度高。技術已在德國康斯坦茨湖完成三米球體的成功試驗,2026 年將在美國加州海岸水深五百至六百米處,投放直徑九米、重達四百噸,容量約為 0.4 MWh 的大型球體示範機,等同可供一般家庭用電數週。未來目標為建立直徑達三十米的球羣於全球海底,支援大規模再生能源發展。儲存介質為海水,無需壓縮空氣,避免了壓縮氣體帶來的效率損失及熱能管理問題。該方案成本材料主要以廉價混凝土與鋼材為主,泵浦和渦輪則為較高精密設備,綜合看來具一定經濟潛力。文章同時探討了系統安全性、可能的維護課題(如水生生物附著),以及與現有電池或儲能系統的成本效益比較,指出這種海底儲能方式有望成為穩定供電的長期解決方案。

🎯 Key Points:
→ 技術原理
 ★ 利用過剩電量抽出球內海水,形成真空壓差,放電時海水迴流帶動渦輪產生電力
 ★ 無需高壓壓縮空氣,避免壓縮氣體的熱能損耗與管線維護複雜度
→ 目前進展與規模
 ① 德國康斯坦茨湖測試三米球成功
 ② 2026 年加州計畫下放九米直徑、容量 0.4 MWh 的示範球體
 ③ 長遠規劃於全球海底部署直徑達三十米的大型儲能球陣
→ 環境與社會優勢
 ★ 置於深海,避免佔用土地和對人類活動的幹擾
 ★ 較水壩水力發電環境友善,不影響流域生態與人類生活
→ 技術挑戰與維護
 ★ 泵浦和閥門等關鍵零件須約每 20 年部分更換,球體壽命約 50-60 年
 ★ 可能面對的水生生物附著問題尚需進一步驗證
 ★ 系統安全考量:若球體承受壓力過大導致破裂,可能產生局部水流劇烈變化,影響附近生物但不致造成連鎖爆炸
→ 經濟性分析
 ★ 主要材料成本較低,但高精度泵浦與渦輪成本仍高
 ★ 與當前鋰電池方案比較,壽命長且適合長期儲能情境(如連日陰天補償)
 ★ 具備較大儲能容量與社會接受度,技術仍需檢驗整體效益和部署挑戰
→ 未來應用價值
 ★ 可配合可再生能源大量發展,解決間歇性能源波動問題
 ★ 為海洋空間提供新型能源儲存基礎設施,促進綠能轉型

🔖 Keywords:
#Concrete_spheres #Energy_storage #Fraunhofer_IEE #StEnSea #Pumped_hydro_storage

Concrete spheres for energy storage; California plans a 9-meter diameter sphere | Hacker News

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Backing Up the Power Grid with Green Methanol

A closed-loop storage-plus-power system stockpiles renewable energy wherever it's needed

IEEE Spectrum