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 280 °C and 64 bar pressure, respectively. Under these conditions, assume that the heat of vaporization of water is 1400 kJ/kg, the heat capacity is 5.3 kJ/(kg-K), and the density is 750 kg/m³. Steam has a density of 33 kg/m³ and heat capacity of 5.1 kJ/(kg-K) under these conditions.
In a Ruths accumulator, 2 kg/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.