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    How South Africa's Eskom avoided more load-shedding this winter - Koeberg Nuclear Unit back online and Wind was contributing 500-1100MW

    Danie van der Merwe · / gadgeteerza-tech-blog · Saturday, 10 July, 2021 - 15:27

In the last full week of load-shedding – between 7 June and 13 June – the average contribution of wind generation during peak evening usage stood at 525MW.

In the most recent week of 28 June to 4 July 2021, the figure was more than double that – at 1,272MW. The week before that, wind generation’s contribution averaged at 1,077MW during the evening peak.

Eskom currently has nearly 5,350MW of renewable generation capacity, including more than 2,700MW of installed capacity at independent power producer (IPP) solar plants and 2,600MW of wind generation from both its own Sere project and private sectors farms.

Of course, Cape Town had been using it's local hydropower station to supplement power and thereby usually managed to be a level lower than the rest of the country for load-shedding.


#technology #renewableenergy #southafrica #eskom #windenergy

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    XMPP for IoT: Visualisation of Meteorological Live Data for Renewable Energy

    debacle · / berlin-xmpp-meetup · Tuesday, 11 May, 2021 - 15:29 edit

Dan and Tim will present a beautiful web application based on Strophe.js and Flot.js to visualise live measuremen data transmitted via XMPP PubSub/PEP. This is not about instant messaging at all, this is IoT, but security included.

When? Wednesday, 2021-05-12 18:00 CEST (always 2ⁿᵈ Wednesday of every month)

Where? Online, via our MUC ( A Jitsi video conference will be announced there.

See you then!

#jabber #berlin #meetup #community #xmpp #iot #webapplication #javascript #strophejs #flotjs #pubsub #pep #security #renewableenergy

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    The world's 'most powerful' tidal turbine is nearly ready to power on - the two megawatt O2 will have the capacity to generate enough energy to power 2,000 UK households annually

    Danie van der Merwe · / gadgeteerza-tech-blog · Sunday, 25 April, 2021 - 12:48

Earlier this week, a company Orbital Marine Power successfully launched its latest tidal turbine. Once it’s connected to the European Marine Energy Centre off the Orkney Islands, the two megawatt O2 will have the capacity to generate enough energy to power 2,000 UK households annually, making it one of the world’s most powerful tidal turbines currently in use.


#environment #tidalturbine #renewableenergy #OrbitalO2

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    A solar panel in space is collecting energy that could one day be beamed to anywhere on Earth... For Good or Bad?

    Danie van der Merwe · / gadgeteerza-tech-blog · Thursday, 25 February, 2021 - 09:05

Scientists working for the Pentagon have successfully tested a solar panel the size of a pizza box in space, designed as a prototype for a future system to send electricity from space back to any point on Earth.

A very interesting project and maybe the key to it is better collection and the conversion to microwave to better penetrate the atmosphere (where sunlight loses some of its effective energy).

Beyond that, scientists will have to test sending the energy back to Earth. The panels would know precisely where to send the microwaves -- and not accidentally fire it at the wrong target -- using a technique called "retro-directive beam control." Now seeing this is being funded by the US Pentagon... I was just wondering what happened if that energy goes to the "wrong target".

But that said, we have to also remember that many of our scientific advances and inventions have been borne out of military and space travel needs. In fact the Internet was borne out of one such project.

See more details at

#technology #energy #USA #space #renewableenergy