(Solved): Problem 4-A) A large compressed air storage tank with a volume of 100m3 is initially at 200 kPa a ...

Problem 4-A) A large compressed air storage tank with a volume of $100{\mathrm{m}}^3$ is initially at 200 $\mathrm{kPa}$ and $288\mathrm{K}$. The supply line valve is opened allowing a constant mass flowrate into the tank of $0.25\mathrm{kg}/\mathrm{s}$. When the tank pressure reaches $800\mathrm{kPa}$ the valve is closed. The supply line to the tank is regulated to maintain a pressure of $900\mathrm{kPa}$ and a temperature of $313\mathrm{K}$. The fluid kinetic and potential energies and the mass of the tank itself are insignificant. Use AIR property values from the class equation sheet at $300\mathrm{K}$. Assume the filling process is so slow that the tank air temperature remains constant at $288\mathrm{K}.(Q\ne 0)$ Find the mass added to the tank and the elapsed time $\Delta t=$ $s$ Find the value of the total external heat transfer for the process, $Q=$ $\mathrm{kJ}$ Repeat For a large STEAM storage tank with a volume of $100{\mathrm{m}}^3$ initially at 3.0 bar and $200{}^{\circ }\mathrm{C}$. The STEAM supply line valve is opened allowing a constant mass flowrate into the tank of $0.25\mathrm{kg}/\mathrm{s}$. When the tank pressure reaches 10 bar the valve is closed. The supply line to the tank is regulated to maintain a pressure of 20 bar and a temperature of $240^{\circ }\mathrm{C}$. The fluid kinetic and potential energies and the mass of the tank itself are insignificant. Use STEAM TABLE values. Assume the filling process is so slow that the tank steam temperature remains constant at $200^{\circ }\mathrm{C}.(Q\ne 0)$ Find the mass added to the tank and the elapsed time, $\Delta \mathrm{t}=$ s Find the value of the total external heat transfer for the process, $Q=$ $\mathrm{kJ}$