“The final report of the Expert Panel on the 28 April 2025 #blackout in continental #Spain and #Portugal identifies the causes of the blackout and outlines recommendations to strengthen the resilience of Europe’s interconnected electricity system.” #energy #history
on 02026-04-08#Portugal got 71% of its electrical #energy from renewables in 02024, but only 10% of that (7% of the total) was #solar, though #photovoltaic generation grew 37% from the year before, and PV capacity by 100%. “The Portuguese National Transmission Network connected 776 MW of photovoltaic installations to the grid in 2024, doubling to 1,555 MW of installed capacity, when compared to the 779 MW operational at the end of 2023.”
on 02025-06-17maybe overvoltages from #solar and #wind #energy were the cause of the #Iberian-blackout? More because it’s distributed than because it’s not spinning? Because generation operators don’t get paid for reactive power? This is confusing. Solar and wind supplied 33% of #Spain’s electrical generation in 02024 and 37% of #Portugal’s.
on 02025-06-17this #adobe #materials #construction #paper #PDF on Aveiro district in #Portugal cites the “2009 New Mexico earthen building materials code” and found mean compressive strengths in Aveiro from 0.66 MPa to 2.15 MPa, with modulus of elasticity from 50-450 MPa and tensile strengths from too low to measure up to 0.40 MPa (typically 10-20% of compressive strength), with rather astonishing strains at peak stress of 5-10%. Adobe from Colombia and Morocco was much stronger. #strength-of-materials
on 02023-07-08