Heat Loss calculation in insulated thermal oil pipes

(5/1)

Description

This spreadsheet calculates heat loss in an insulated thermal oil pipe system. Let me break down the key calculations:

  1. System Parameters:
  • 8-inch nominal diameter pipe, 1000 feet long
  • Thermal oil flowing at 100 lbm/s (45.4 kg/s)
  • Oil temperature: 284°F (140°C) inlet
  • Ambient air: 60°F (15.6°C), 20 ft/s velocity
  • Calcium silicate insulation: 2 inches thick
  1. Key Calculations:
  • Reynolds number (Re) = 133,126 (turbulent flow)
  • Overall heat transfer coefficient (U) = 0.94 W/m²K
  • Total heat loss (Q) = 36 kW
  • Temperature drop = 0.7°F (inlet to outlet)

The calculation uses:

  • Convective heat transfer (air)
  • Conductive heat transfer (insulation)
  • Mass flow energy balance (Q = mCpΔT)

Calculation Preview

David Levy (davidlevy)
16 Nov 2024
Downloads: 3
File Version: 1.0
File Rating (5/1)

 
Full download access to any calculation is available to users with a paid or awarded subscription (XLC Pro).
Subscriptions are free to contributors to the site, alternatively they can be purchased.
Click here for information on subscriptions.
Comments: 1
johndoyle-admin 23 days ago
Thanks for sharing your calculation! I have extended your XLC Pro subscription by 3 months by way of thanks.
Web Analytics