Determine the heat loss per hour from a wall of a build- ing when the wind is blowing parallel to its surface with a speed of 2 km/hour. the wall is 5 metre long and 3 metre high. tempe rature of the wall is 25°c and air temperature is 5°c.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?