Steam hot service insluation thicknesses, Mechanical Engineering

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Q. Steam Hot Service Insluation Thicknesses?

Steam Hot Service Insluation Thicknesses are specified based on the following design criteria:

Average Annual Climatic Conditions: Fort McMurray, Alberta
Straight payout period: 5 years
Heat Loss Calculation Program: North Am. Ins. Manufacturers Ass. 3E Version 3.2
Hours of operation: 39420 (90% of number of hours in 5 years)
Bare surface emittance : 0.8 emittance Steel
Outside surface emittance: 0.1 Aluminum
Energy conversion efficiency: 80% for Steam Hot Service
Fuel type: Natural gas
Fuel heat content: 0.0382 GJ/m³
Fuel cost: $5/GJ
Pipe and Insulation dimensions per ASTM C 585
Yearly outdoor ave. amb. Temp.: 0.2°C (32.4 °F)
Yearly outdoor ave. wind vel.: 10 km/h
Indoor ave. Temp.: 15ºC
Indoor ave. wind vel.: 0 km/h

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