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1. A.C. Tupper (actupper@scicomm.xyz)'s status on Tuesday, 28-Feb-2023 02:30:06 JST A.C. Tupper

   Today's magnesium combustion brain bubblegum: adapting the Allam-Fetvedt Cylce to utilize magnesium instead of carbonaceous fuels.

   Unlike a normal A-F cycle, you wouldn't have to introduce oxidizer or tap off excess CO2 and H2O. The CO2 would be consumed in the combustion process.

   The big trick would be efficient removal of the MgO and C ash from the supercritical gas stream prior to turbine utilization without incurring huge pressure drop penalties. 🤔

   • A.C. Tupper (actupper@scicomm.xyz)'s status on Tuesday, 28-Feb-2023 02:30:04 JST A.C. Tupper

     in reply to

     Wikipedia Links:
     A-F Cycle: https://en.m.wikipedia.org/wiki/Allam_power_cycle

     Tesla Turbine:
     https://en.m.wikipedia.org/wiki/Tesla_turbine

     Magnesium Oxide:
     https://en.m.wikipedia.org/wiki/Magnesium_oxide

   • A.C. Tupper (actupper@scicomm.xyz)'s status on Tuesday, 28-Feb-2023 02:30:05 JST A.C. Tupper

     in reply to

     I wonder if this would be one of the rare instances where a Tesla turbine actually makes sense, given the high density of supercritical CO2 and its ability to work with abrasive fluids. The centrifugal forces and blade alignment could help with the separation process, acting as a cyclone separator and turbine in one. That would certainly be handy. You would probably need a positive pressure stream of clean gas near the bearings to prevent particulates.

     Adrian Cochrane repeated this.