Engineering, 18.07.2019 01:50 jvsome8
Consider an electric motor with a shaft power output of 20 kw and an efficiency of 88 percent. determine the rate at which the motor dissipates heat to the room it is in when the motor operates at full load. in winter, this room is normally heated by a 2-kw resistance heater. determine if it is necessary to turn the heater on when the motor runs at full load.
Answers: 3
Engineering, 04.07.2019 18:10
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
Answers: 1
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:10
Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines
Answers: 1
Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
Answers: 3
Consider an electric motor with a shaft power output of 20 kw and an efficiency of 88 percent. deter...
English, 31.03.2021 21:00
Geography, 31.03.2021 21:00
Mathematics, 31.03.2021 21:00
Biology, 31.03.2021 21:00
Mathematics, 31.03.2021 21:10
Mathematics, 31.03.2021 21:10
Computers and Technology, 31.03.2021 21:10
Mathematics, 31.03.2021 21:10
Mathematics, 31.03.2021 21:10