Steam is available at 180◦ c and cooling water at 20◦ c. 

a. for a minimum permissible temperature difference (?t_min ) of 10◦ c, calculate the minimum hot and cold utility requirements. 

b. what are the hot and cold stream pinch temperatures? 

c. if the steam is supplied as the exhaust from a steam turbine, is the heat engine appropriately placed? 

d. if the (?tmin ) is increased to 20◦ c, what will happen to the utility requirements?