Example 2: Air with a mass flow rate of

2.3k(g)/(s)

enters a horizontal nozzle operating at steady state at

450K,350kPa

, and velocity of

3(m)/(s)

. At the exit, the temperature is

300K

and the velocity is

460(m)/(s)

. Using the ideal gas model for air with constant

cp=1.011k(J)/(k)g*K

, determine the heat transfer between the nozzle and its surroundings, in

kW

. Specify whether the heat transfer is to or from the air.\

Air _()\ T_(1)=450K\ p_(1)=350kPa\ V_(1)=3(m)/(s)\ c_(p)=1.011k(J)/(1)\ m_(1)^()=2.3k(g)/(s)

Example 2: Air with a mass flow rate of 2.3kg/s enters a horizontal nozzle operating at steady state at 450K,350kPa, and velocity of 3m/s. At the exit, the temperature is 300K and the velocity is 460m/s. Using the ideal gas model for air with constant cp=1.011kJ/kgK, determine the heat transfer between the nozzle and its surroundings, in kW. Specify whether the heat transfer is to or from the air