Dry air at T¥ = 36.5°C flows over a wetted flat plate of length L = 0.5 m and width of w = 2 m. An embedded electrical heater supplies Pe = 700 W and the surface temperature is Ts = 17°C. Use diffusivity of water in air, DAB = 0.26 × 10-4 m2/s; density, rA, s = 0.025 kg/m3; specific enthalpy of water, hfg = 2450 kJ/kg for saturated water around the surface.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

What is the main objective of using reheat rankine cycle?