Unless thermodynamics suddenly changes, how exactly is the cooling problem being solved? Yeeting hot chunks of matter out the back? On a planetary body you have an entire massive system of matter to reject your heat into. In space, you have nothing.

The obvious solution is for half of the hardware to run on dark energy, counteracting the heat generated by the other half. Venture capitalists, use my gofundme site to give me the millions needed to research this, thanks.