Heat Transfer · Fins and transient conduction
Superheated steam at 250 °C with h_i = 200 W/m²·K flows inside a carbon-steel pipe (k =…
Problem
Superheated steam at 250 °C with h_i = 200 W/m²·K flows inside a carbon-steel pipe (k = 45 W/m·K, ID = 80 mm, OD = 90 mm). The pipe is insulated first with 15 mm of perlite (k = 0.060 W/m·K) and then with 25 mm of fiberglass (k = 0.036 W/m·K). Outdoor air is 10 °C with h_o = 18 W/m²·K. For a 12 m run, construct the full cylindrical thermal network, evaluate every resistance, and find the steam-to-air heat-loss rate and the steel–perlite interface temperature.
Hint
Full network: inner convection, steel wall, perlite, fiberglass, outer convection.
Check your work
Work the problem yourself first. Then open it in Training to check your answer and read the full worked solution.
The answer check and full solution for this problem come with ProofAnvil Practice membership ($19 USD monthly). See membership. Or start with the free Heat Transfer sample problem: Try the free sample problem.
More Heat Transfer practice problems
- A 12 mm thick copper plate (k = 401 W/m·K) has uniform face temperatures of 85 °C and…Steady conduction and thermal resistance
- A 1.00 m² contact joint between two metal blocks has a measured temperature drop of 8.5…Steady conduction and thermal resistance
- An annular aluminum fin of uniform thickness 1.5 mm, inner (base) radius 12 mm, and…Fins and transient conduction
- An orange, modeled as a sphere of diameter 80 mm, is taken from storage at 4 °C and…External and internal convection
- Atmospheric air at Ti = 20 °C enters an aligned tube bank with 8 rows of tubes in the…External and internal convection
- Turbulent water flow (Re_D = 4.6 × 10⁴, Pr = 5.4) enters a 20 mm i.dThermal radiation and enclosure exchange
- Refrigerant vapor is condensed on the outside of a 19 mm o.dThermal radiation and enclosure exchange
- A single horizontal condenser tube of outer diameter D = 25 mm and length L = 2.40 m…Heat exchangers and effectiveness methods
- A one-dimensional steady conduction problem is discretised on a uniform mesh with…Coupled modes and numerical heat transfer