Which is an alloy of sodium and potassium, is used to cool fast neutron nuclear reactors. the nak flows at a rate of m . 1 kg/s through a d 50-mmdiameter tube that has a surface temperature of ts 450 k. the nak enters the tube at tm, i 332 k and exits at an outlet temperature of tm, o 400 k. determine the tube length l and the local convective heat flux at the tube exit.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.