It is required to compare the cooling water requirements of single$-$pass

and two$-$pass surface condensers having the same total heat transfer area

and inlet water conditions. Assume that both have $20000,12m$ long, $7/8$

in OD $18-$BWG tubes. Cooling water enters the tubes at $20C.$ The steam

flow rate is $1000to\frac{n}{h}r$ and the inlet conditions are $0\mathrm{.}07$ bar and $92\mathrm{.}6\%$

quality.