Granted that EVM SUT has benefits for arid regions over STP as...

Granted that EVM SUT has benefits for arid regions over STP as it has no emissions and no energy input as opposed to the STP which requires chemicals and water. The EVMSUT has the potential to create land that could become viable arable land (due to moisture condensate in the tower). While there may be no direct emissions I understand that the STP style plants heat up a medium that becomes molten and that is used to heat water to generate steam in a closed loop, but surely at some point pressure vessels require to vent to open air - maybe they don't classify heated water as an emission.

With regard to viability, there has never been a SUT tower built commercially by anyone involved with EVM. There are other licensees that have produced one or two smaller scale plants in China I think. There has been the test facility in Manzares but that was a research system only and can't be counted as a commercial project. The EVM would have been the first of its kind, but we all know what happened with our chance, essentially squandered (I'm sure the management have tried but you can only push poop uphill so long before you give up). Not all idea's succeed. With the infiltration of cheaper PV and now battery, pricing is so competitive an SUT will struggle to compete - however the SA STP suggests there may still be slither of hope.

The budget for the STP seems to fit in with SA govt requirements. so EVM SUT may still have a chance - add in a small battery solution as per the Neoen/ Tesla unit or a ASX:CCE system and you have a worthwhile energy generator system.

I hope EVM has been trying to put tenders in for the jobs that have been going around. If not I question what they have been doing?