Water at atmospheric pressure is boiled in a container using a horizontal 8 mm electric wire (ɛ=0.9) whose temperature is maintained by an electric current at 2500C. Estimate the boiling heat transfer...

Water at atmospheric pressure is boiled in a container using a horizontal 8 mm electric wire (ε=0.9) whose temperature is maintained by an electric current at 250oC. Estimate the boiling heat transfer coefficient between the water and the wire surface. Properties of Water, liquid: ρl = 957.9 kg/m3, hfg = 2257 kJ/kg, vapor: ρv = 4.8 kg/m3, Cp,v = 2560 J/kg.K, μv = 14.85*10-6 N.s/m2, kv=0.0331 W/mK. Select one: a. 247 W/m2K b. 440 W/m2K c. 90.7 W/m2K d. 710 W/m2K


Extracted text: Water at atmospheric pressure is boiled in a container using a horizontal 8 mm electric wire (ɛ=0.9) whose temperature is maintained by an electric current at 2500C. Estimate the boiling heat transfer coefficient between the water and the wire surface. Properties of Water, Iliquid: pl = 957.9 kg/m3, hfg = 2257 kJ/kg, vapor: pv = 4.8 kg/m3, Cp,V = 2560 J/kg.K, µv = 14.85*10-6 N.s/m2, kv=0.0331 W/mK. Select one: a. 247 W/m2K b. 440 W/m2K c. 90.7 W/m2K d. 710 W/m2K 6/8