Q is irrelevant, you need throughput. If your Q is one million, but you are processing one tiny capsule per second, you are producing too little money to pay for the facility.
If you can process a tanker worth of hydrogen per second, Q can be just above break even and you will still make money.
Irrelevant? Seems like Q is one of two factors in that calculation. If the throughput is tiny, you're useless, but if your Q is too small, the same is true.
The higher the Q, the lower throughput needed for feasibility.
If you can process a tanker worth of hydrogen per second, Q can be just above break even and you will still make money.