$($P$)$ Pressure sensor $($T$)$ Temperature sensor

Hot water inlet: $80C,$ cold water inlet: $15C,$ outlet: $20C45C$ Flow rates: hot: $0\mathrm{.}1-3$ L$/$min$,$ cold: $0\mathrm{.}1-1\frac{L}{m}in$ pipe roughness: any $($ex$.\frac{}{d}=0-{10}^{-4})$

$3.$ Find the performance of the heat exchanger

$>$ range of feasible heat transfer rates

$>$ range of effectiveness of the heat exchanger

$>$ ranges of pressure drops and heat transfer coefficients for inner and annulus sides, respectively

$>$ flowrates to obtain desired outlet temperatures of cold and hot fluids