Air at 2 a t m 2 a t m and 500 K 500 K with a velocity of U =

Air at $2atm$ and $500K$ with a velocity of $U=20m/s$ flows across a compact heat exchanger matrix having surface type I1.32-0737-S-R. The length of the matrix is $0.8m$. Calculate the heat transfer coefficient and the frictional pressure drop. Use the following properties of air at $500K$ and $2atm:\rho =1.41kg/m^3;C_p=1030$ $J/kg-K;\mu =2.69\times {10}^{-5}kg/m-s;\mathrm{Pr}=0.718$.

Air at $2atm$ and $500K$ with a velocity of $U=20m/s$ flows across a compact heat exchanger matrix having surface type 9.29-0.737-S-R. Calculate the heat transfer coefficient and the frictional pressure drop. The length of the matrix is $0.8m$.