Aheat pump receives energy from a source at 60 °c and delivers energy to a boiler that operates at 250 kpa. the boiler input is saturated liquid water and the exit is saturated vapor both at 350 kpa. the heat pump is driven by a 2.5 mw motor and has a cop that is 50% of a carnot heat pump cop. what is the maximum mass flow rate of water the system can deliver?

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.