A row of regularly spaced, cylindrical heating ele- ments (1) is used to cure a surface coating that is applied to a large panel (2) positioned below the ele- ments. A second large panel (3), whose top surface is well insulated, is positioned above the elements. The
(a) Evaluate the mean gas temperature, Tm.
(b) What is the rate per unit axial length at which electrical energy must be supplied to each element to maintain its prescribed temperature?
(c) What is the rate of heat transfer to a portion of the coated panel that is 1 m wide by 1 m long?