Engineering, 13.11.2019 04:31 kklove6700
Athin electrical heater is wrapped around the outer surface of a long cylindrical tube whose inner surface is maintained at a temperature of 5°c. the tube wall has inner and outer radii of 40 and 90 mm, respectively, and a thermal conductivity of 10 w/m·k. the thermal contact resistance between the heater and the outer surface of the tube (per unit length of the tube) is 0.01 m·k/w. the outer surface of the heater is exposed to a fluid with [infinity] -10°c and a convection coefficient of 100 w/m2·k. determine the heater power per unit length of tube required to maintain the heater at 25°c.
Answers: 1
Engineering, 04.07.2019 18:10, oshawn108
Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k
Answers: 2
Engineering, 04.07.2019 18:20, ashleyjaslin
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
Answers: 3
Engineering, 04.07.2019 19:10, jimena15
10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.
Answers: 2
Athin electrical heater is wrapped around the outer surface of a long cylindrical tube whose inner s...
History, 22.05.2020 00:01
History, 22.05.2020 00:01