Chapter 1, Problem 1.36P

Pressurized water $\left(p_{in}=10\text{bar,}{T}_{\text{in}}=110°\text{C}\right)$ enters the bottom of an $L=10\text{-m}$ -long vertical tube of diameter $D=100\text{mm}$ at a mass flow rate of $\stackrel{.}{m}=1.5\text{kg/s}\text{.}$ The tube is located inside a combustion chamber, resulting in heat transfer to the tube. Superheated steam exits the top of the tube at $p_{\text{out}}=7\text{bar},T_{out}=600°\text{C}\text{.}$ Determine the change in the rate at which the following quantities enter and exit the tube: (a) the combined thermal and flow work, (b) the mechanical energy, and (c) the total energy of the water. Also, (d) determine the heat transfer rate, q. Hint: Relevant properties may be obtained from a thermodynamics text.