Engineering, 16.10.2019 05:20 itzia00
Acartridge electrical heater is shaped as a cylinder of length l = 300 mm and outer diameter d = 30 mm. under normal operating conditions, the heater dissipates 2 kw while submerged in a water flow that is at 20 c and provides a convection heat transfer coefficient of ° w/m2 h = 5000 k. neglecting heat transfer from the ends of the heater, determine its surface temperature ts and the thermal resistance due to convection. if the water flow is inadvertently terminated while the heater continues to operate, the heater surface is exposed to air that is also at c but for which w/m2 20° h = 50 k. what are the corresponding thermal resistance due to convection and surface temperature? what are the consequences of such an event?
Answers: 1
Engineering, 04.07.2019 18:10, anna22684
Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.
Answers: 2
Engineering, 04.07.2019 18:10, QueenLife4869
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
Acartridge electrical heater is shaped as a cylinder of length l = 300 mm and outer diameter d = 30...
Mathematics, 17.11.2020 01:30
History, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
History, 17.11.2020 01:30
Biology, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
English, 17.11.2020 01:30