Differentiate between boiling and condensation. Draw a boiling curve with different regimes and explain in brief. Why nucleate boiling is most desirable in boiling regimes?
A hot plate of 30 cm acts as a hot pan of water at 1 atmosphere. The temperature of the pan bottom is at 130°C. Estimate heat transfer rate by the plate. csf=0.013c_{sf} = 0.013, surface tension of water = 58.0 mN/m.
Differentiate between boiling and evaporation. How can boiling heat transfer be enhanced? Explain in brief.
Why is modified latent heat used? Explain also why higher heat transfer occurred in dropwise condensation than in filmwise.
Steam at 105°C at atmospheric pressure condenses on a 4m high and 3m wide vertical plate which is maintained at 80°C by circulating cooling water through one side. Determine
Differentiate boiling, evaporation and condensation. Enlist the different types of boiling.
Describe the pool boiling mechanism with neat sketches.
How can boiling heat transfer be enhanced?
What is boiling? What is the difference between pool boiling and flow boiling? Give examples of pool boiling and flow boiling.
Draw the pool boiling curve and identify all the boiling regimes.
A hot plate of 30 cm by 30 cm acts as a hot pan of water at 1 atmosphere. The temperature of the pan bottom in at 120 °C. Estimate heat transfer rate by the plate csf_{sf} = 0.013, surface tension of water = 58.0 mN/m.
What is the difference between pool and flow boiling? Draw the pool boiling curve and identify the different boiling regimes. Also explain the characteristics of each regime.
A heated 35 cm by 35 cm square plate serves as the bottom for a pan of water at 1 atm pressure. The temperature of the plate is maintained at 119 °C. Estimate the heat transfer rate by the plate Cf = 0.013. Vapor-liquid surface tension for water = 58.8 mN/m.