If drop this value from 1 block per second to 1 block per 30 second, then TPS will drop to 7, the same as current design 
You need to multiply blocksize b as well.
This is what confuses me, if 32 transactions per KB, a 320KB block will make it 10240 transactions per block, not the 242.4 transactions per second that stated on that paper page 21
But since they are using a different method to propagate the blocks, maybe what they said is true? Unfortunately that 242.4 TPS is given by a formula which is unclear for its meaning, I have to read more