Instructions

• Line 1. Enter the surface area of interest
• Line 2. Enter average operating (process) temperature for the period of operation
• Line 3. Enter average ambient temperature for the period of operation
• Line 4. Enter average wind speed for the period of operation (if unknown, use 1 mph for indoor, 8 mph for outdoor)
• Line 5. Select an insulation material. Note: Calculator does not screen for material temperature limitations - use caution.
• Line 6. Enter a cost multiplier to modify the default installed costs (e.g. enter 1.10 to increase costs 10%)
• Line 7. Enter the effective emittance of the exterior surface (see MIDG>Design Data>Table 1 for guidance)
• Line 8. Enter the expected life of the insulation system in years
• Line 9. Enter the number of hours per year of system operation (e.g. 8760 for full year operation)
• Line 10. Enter the conversion efficiency of the system in percentTypical conversion efficiencies for various systems are:
  

  Fossil fuel boilers (Non-condensing)	65 - 85%
  Fossil fuel boilers (Condensing)	80 - 95%
  Electric resistance boilers	92 - 96%
  Electrically operated chillers	300 - 700%
  Absorption chillers	60 - 100%

• Line 11. Select the fuel used
• Line 12. Enter cost of fuel if known or use default value

Assumptions

• One dimensional, steady state heat transfer
• Base structure is a vertical flat steel surface
• Thermal conductivity based on ASTM Specification Values
• Installed costs of insulation are from industry sources and represent single layer installations
• Installed costs include aluminum jacketing but do not include vapor retarders or vapor sealing
• Fuel content, emissions and typical fuel costs are from U.S. Energy Information Administration
• Emissions are in Metric Tonne per year (MT/yr)and are are assumed to be at the facility (except for electricity which are are at the power plant)

Note: NA means Not Available