Engineering, 11.07.2019 04:10 bestkitty2588

Consider an electrically heated melting furnace in the shape of a truncated cone with a height of 7.5m and a base diameter of 5m. at the top of the furnace is an opening with diameter 2.5m. is proposed to place a disk-shaped covering with hole diameter 1.5m to reduce energy losses while still allowing for the charging of materials to keep the furnace in continuous operation. (i) determine the power required to opcrate the furnace such that, when cmpty (i. e under preheat), the surface temperatures of the conical sides are at 1000°c and the surface temperature of the base is50°c. the ambient temperature at the top of the furnace is 300°c. (2)-calculate the percent reduction in energy if the covering is used, assuming the same ambient temperature as that given above.

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 03.07.2019 15:10, breannaasmith1122

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Answers: 1

continue

Engineering, 04.07.2019 18:10, heidiburgos1own6c0

Fluids at rest possess no flow energy. a)- true b)- false

Answers: 3

continue

Engineering, 04.07.2019 18:10, abdirahmansoloman

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

continue

Engineering, 04.07.2019 18:10, katelynn73

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1

Answers: 1

continue

You know the right answer?

Consider an electrically heated melting furnace in the shape of a truncated cone with a height of 7....