突尼斯4.5GW的沙漠太陽能熱發電地點(紅點)
Source: Google map
博主補充:
須說服當地人為什麼不能採用以下低成本太陽能光伏布局 (理由是會影響地中海水貭, 除非將排水用 1,000公里管道輸送往摩洛哥入海,
與此同時, 附近的阿爾及利亞 Chott
Melrhir 低地 (海平面下 40 公尺, 6,700平方公里)也有機會利用同一管道, 見下圖紅點):
Source: Google map
突尼斯低成本太陽能光伏布局 :
於海口處設全日水力發電,
引地中海水入傑里德大鹽湖 Chott el Djerid 低地 (海平面下
10 至 25 公尺, 7,000平方公里).
日出即由光伏陣列發電提低地之水上附近地面巨大貯水池. 水池滿溢後水倒流入低地發電, 同一池水循環再用多次. 地中海入口處只容許進水. 排水方面,
地面貯水池有 1000 公里密封管道通往摩洛哥入海. 設計水體循環若干年一次, 避免水質因蒸發而過鹹,
類似的工程還有附近阿爾及利亞 Chott
Melrhir 低地 ( 見上圖紅點), 摩洛哥鹽盤 Tah 工程計劃,
智利 Valhalla.cl
(2017年內開始建造), 死海, 埃及 Qattara
低地等等.
撒哈拉熱帶沙漠 (少於 20% 是沙漠, 其他是岩漠 hamada) 若有設施如海水管道, 加上海水淡化可容納大量移民. 大規模綠化沙漠之下,
管道出口可設於摩洛哥, 西撒哈拉二國分界處出海.
為什麽要用 1,000 公里管道而不用運河? 因為長運河涉及龐大管理(如風沙之移除),
須避免停電維修.
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Wikipedia 記載摩洛哥 2008 已有類似計劃 (風力提水):
摩洛哥 Hybrid Sebkha 鹽盤 Tah Project 工程計劃:
Source: Google map
海邊 Tah 鹽盤低地位於摩洛哥與西薩哈拉分界(虛)線上
Hybrid Sebkha 鹽盤 Tah Project
One project plans to link the high wind potential of the Tarfaya region with the difference in altitude between the ocean and the sebkha 鹽盤 to produce electric power on demand. The water pumped into the ocean would feed hydraulic turbines before arriving in the sebkha Tah 55 meters below. Part of the energy produced by the wind, when it is available, is used to drive pump driving back to the ocean water stored in the basin.
摩洛哥鹽沼
Source: http://moroccanenergy.blogspot.com/2013/03/sabkha-tah.html
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Giant Tunisian desert solar project aims to power
EU
04/08/2017
轉載自 : http://www.climatechangenews.com/2017/08/04/giant-solar-project-tests-sahara-eu-power-export-dream/
Developer TuNur this week
applied for authorisation to build a massive solar plant on the edge of the
Tunisian Sahara, with undersea grid connections to Europe
TuNur is proposing a series of concentrated solar plants
like Spain's Gemasolar, here pictured from the historic Solar Impulse
round-the-world flight in July (Pic: Solar Impulse)
By
Megan
Darby
There has been talk of tapping into the Sahara desert’s vast
resources of sunshine to power Europe for years, but little to show for
it.
The high-profile Desertec initiative, conceived with 19 shareholders and a
budget of €400 billion, flopped 撲通落下 amid cost concerns and political instability across
North Africa.
Now a massive project in Tunisia is hoping to be the first to make the solar
power export dream a reality. Developer TuNur this week filed a permit request to the energy ministry to build 4.5GW
of capacity near Rjim Maatoug, in the southwest of the country.
The electricity generated is destined for Europe, with cables under the sea
to Malta, Italy and France.
If all goes smoothly, TuNur chief executive Kevin Sara told Climate
Home a first 250MW phase, with a connection to Malta, could be running
by 2020, for an estimated €1.6 billion investment.
Report: Conflict-hit
Syrian hospital goes solar to save lives
The business case rests on Tunisia’s bountiful sunshine – up to 20% more than
the best sites in Europe, according to TuNur – and vast area of uncultivated
land. EU climate and clean energy goals create demand.
TuNur plans to use concentrated solar power technology, which works by
reflecting the sun’s rays onto a central tower from an array of mirrors. Using
molten salt to store the energy, it can flex 顯示力量 generation to meet variable demand.
The initial 250MW plant would already be one of the largest
thermal solar facilities on earth.
If fully realised, the development would cover 25,000 hectares, nearly
three times the area of Manhattan. “There is so much land, which is completely
marginal land – it is not good enough for agriculture,” said Sara. “It is just
sitting there and the local people are delighted that we are coming to do
something with it.”
In 2014, Tunisia became the third country in the world to ink
climate protection into its constitution. That was followed by a renewable energy law in 2015.
Political hurdles remain. TuNur lobbied hard to get provision for exports
included in the clean energy legislation, against resistance from the state
electricity monopoly. This is its first test case.
The Tunisian energy ministry did not respond to an emailed request for
comment.
“This was really the will of the parliament that the renewable energy export
industry be opened up,” said Sara. “We are cautiously optimistic.”
Report: Tunisia
embeds climate change in constitution
The TuNur project is 50% owned by UK-based company Nur Energie and 50% owned
by investors from Tunisia and Malta.
Some north Africans are wary of the whole enterprise. In a 2015
critique of the Desertec initiative published in the New Internationalist,
Algerian activist Hamza Hamouchene accused its proponents of
neo-colonialism.
“The Sahara is described as a vast empty land, sparsely populated;
constituting a golden opportunity to provide Europe with electricity so it can
continue its extravagant consumerist lifestyle and profligate 肆意揮霍 energy
consumption,” he wrote.
“This is the same language used by colonial powers to justify
their civilizing mission and, as an African myself, I cannot
help but be very suspicious of such megaprojects and their ‘well-intentioned’
motives that are often sugar-coating brutal exploitation and sheer robbery.”
The TuNur export project was being discussed while Tunisians faced power
outages 停電 and relied on neighbouring Algeria for energy, he added.
But Sara said people in the region were supportive of the project. Indeed, he
argued building a solar industry would help redress the inequality between
Tunisia’s wealthy coastal cities and underdeveloped interior. “What we want
to do is really create a [solar export] sector and other people to follow
us.”
A press release announcing the application to the government
cites Mohamed Larbi Ben Said, chair of the management board for El Ghrib
Collective, which owns the land. “This project provides the economic
development necessary for our region and our community; it gives true value to
quasi-desert lands in an environmentally sustainable way,” he said.
TuNur was associated with the Desertec Industrial Initiative, but Sara
expressed confidence in avoiding its fate: “What we found [with Desertec]
was a big consortium of companies looking for business opportunities, but no
plan, no projects. That was the problem. We have always been focused on a very
specific project on a specific site.”
