Dry air at 32C flows over a wetted plate of length 200 mm and width 1 m

Dry air at 32°C flows over a wetted plate of length 200 mm and width 1 m (case A). An imbedded electrical heater supplies 432 Wand the surface temperature is 27°C.

(a) What is the evaporation rate of water from the plate (kg/h)?

(b) After a long period of operation, all the water is evaporated from the plate and its surface is dry (case B). For the same free stream conditions and the same heater power as case A, estimate the temperature of the plate, Ts.

Transcribed Image Text:

T= 32°C T= 32°C Water film Air T, = 27°C Lex Case A Case B