Engineering, 06.11.2019 04:31 sydsunkae14m
Air is drawn from the atmosphere into a turbomachine. at the exit, conditions are 500 kpa (gage) and 130oc. the exit speed is 100 m/s and the mass flow rate is 0.8 kg/s. flow is steady and there is no heat transfer. compute the shaft power interaction with the surroundings.
Answers: 3
Engineering, 04.07.2019 18:10
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
Answers: 2
Engineering, 04.07.2019 18:20
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.
Answers: 1
Engineering, 04.07.2019 19:20
Acarnot refrigerator operates in a room in which the temperature is 21Ā°c and of power when operating. if the food compartment of the refrigerator is consumes 3 kw to be maintained at 2Ā°c, determine (a) the coefficient of performance of the cycle and (b) the rate of heat removal from the food compartment. refrigerator cycle that has a higher coefficient of performance than that of the discussed (e) is it possible to develop a carn ot refrigerator, operating between the same temperature limits? explain
Answers: 2
Engineering, 06.07.2019 02:30
Precipitation hardening can be achieved in many light alloys by a three-step heat treatment. what is carried out and what is the purpose at each step? why is such a treatment necessary based on the nucleation and growth theory of phase transformation. compare this treatment with tempering martensite for carbon steels (similarities and differences).
Answers: 1
Air is drawn from the atmosphere into a turbomachine. at the exit, conditions are 500 kpa (gage) and...
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