MAE 204 Lecture Notes - Lecture 5: Energy Economics, Thermal Radiation, Heat Transfer Coefficient
28 Sep 2016
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3. radiation conduction:energy transfer due to particle interaction where the medium is stationary typicelly soid to solid the rate of conductive heat transfer is given by fourier"s law. Tf = incoming fluid temperature h= convective heat transfer coefficient unit of w/m^2k. No physical medium is need for radiative heat transfer. E = emissivity 0 must be in k. Ts = surrounding temperature > must be in k summary: conduction q. condu = -kt a dt/dx convection q. cov = ha (ts-tf) raditatin q. rad = eza(tb^4-ts^4) Adiabatic process: a process with zero heat transfer, q =0. Occurs 2 ways the system and surroudings are at the same tempertureand no work. 1: a well-insulatde system- well insulated = abiabatic q=0. Adiabatic not equal isotherml consider the compression of a gas in a well insulated piston:
