For this problem, assume that both systems in a$)$ and b$)$ contain liquid and vapor in equilibrium, and

are held at a constant temperature and pressure $($using an external heat source$)$ of $280C$ and $64$ bar

pressure, respectively. Under these conditions, assume that the heat of vaporization of water is $1400$

$k\frac{J}{k}g,$ the heat capacity is $5\mathrm{.}3k\frac{J}{kg-K},$ and the density is $750k\frac{g}{m^3}.$ Steam has a density of $33k\frac{g}{m^3}$

and heat capacity of $5\mathrm{.}1k\frac{J}{kg-K}$ under these conditions.

a$)$ In a Ruths accumulator, $2k\frac{g}{s}$ of steam is removed to feed a turbine. Calculate the power required

to vaporize enough liquid water to replace the steam removed and keep the system at constant

temperature and pressure.

b$)$ In an expansion accumulator, $2k\frac{g}{s}$ of liquid water are removed through the bottom of the

accumulator and fed to a flash evaporator. Calculate the power required to vaporize enough of

the remaining liquid water to keep the accumulator at constant temperature and pressure.

c$)$ Comment on the results you found for parts a$)$ and b$).$ Why might one prefer a Ruths accumulator?

Why might one prefer an expansion accumulator?