4 ms·
Concrete takes 1.1MJ/kg to manufacture[1]. So, you get ~4000kg of concrete for one laptop's worth of embodied energy. Amortised over the expected lifetimes of t
by fdewrewrewf 4y ago
Concrete takes 1.1MJ/kg to manufacture[1]. So, you get ~4000kg of concrete for one laptop's worth of embodied energy. Amortised over the expected lifetimes of the items in question, manufacture of high-density electronics still represents our greatest usage of energy.
[1]https://en.wikipedia.org/wiki/Embodied_energy https://en.wikipedia.org/wiki/Embodied_energy
- lostlogin 4y agoThanks for this. Something to keep in mind - concrete weighs an awful lot and comes in at 2.2-2.5 tons per cubic meter. That 4000kgs is less than 2 cubic meters of concrete. If it’s reinforced steel the energy usage leaps up. Building is incredibly energy intensive and very wasteful. Thanks for your link, it’s really interesting.
- littlestymaar 4y agoYeah, concrete is dense and we use a enormous amount of it! We're making 4 billion tons of concrete each year, nnd without even counting the energy needed for transporting it (which is also high, because of the enormous mass involved), concrete production represent 8% of the total CO2 emissions! https://www.archpaper.com/2019/01/concrete-production-eight-percent-co2-emissions/ https://www.archpaper.com/2019/01/concrete-production-eight-...
- seppel 4y agoI'm wondering whether the 1.1MJ/kg takes into account that the heat used for cement production is often used for heating nearby households.