where r R is a time constant that results from the sum
of the storage capacitance of the reheater and of
FWHs, multiplied by the flow resistance of RhT,
while the last term results from the consideration that
condensation mfr variation Aw c is essentially due to
feed-water mfr variation Aw w . In controlled
conditions 8w w strictly follows 8wr, so that (29)
becomes: