Engineering, 18.02.2020 04:21, melanie7152
A radioactive material of thermal conductivity k is cast as a solid sphere of radius ro and placed in a liquid bath for which the temperature T infinity and convection coefficient h are know. Heat is uniformly generated within the solid at a volumetric rate of q dot. Obtain the steady state radial temperature distribution in the solid, expressing your results in terms of ro, q dot, k,,h, and T infinity.
Answers: 3
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
A radioactive material of thermal conductivity k is cast as a solid sphere of radius ro and placed i...
English, 08.01.2020 03:31