Plans for a 10kw fresnel lens free piston harwell stirling engine

[youarenotwelcomekhan]

hello, found out about this site on reddit.
Was planning to design a 10 kw stirling engine with fresnel lens. I wanted to do the free piston design known as harwell thermo mechanical generator. Came across some formulae for free piston stirling engine made by Baele and west. But wanted to know its feasibility for running a 10 kw generator. From my calculations, I need to generate 400 Nm torque to drive the 10 kw generator. Any directions guys?