I understood now.
You can playback video in MPC-HC player at x3 speed. SVP will detect it and properly interpolate to desire framerate.
Your example 24 fps --- speedup x3 --> 72 fos --- interpolate x2 --> 144 fps
But you need to allow SVP to interpolate high framerate sources:
Open SVP profile "Ignore HFR sources" and change condition: increase value of Video frame rate from 47 to 80, for example.