2018 Tunnel House Heat Gain Analysis Spreadsheet (v1.2)

2018 Tunnel House Heat Gain Analysis Spreadsheet (v1.2)

  • Input (english units with metric equivalents displayed):

    • house dimensions
    • ceiling type (open/dropped)
    • side wall type (curtain/solid)
    • wall and ceiling R-values
    • bird size, number, and heat production
    • lighting system details
    • maximum expected outside temperature
    • maximum desired inside temperature (typically 85 F)
  • Outputs (english and metric units):

    • Total heat gain through each building surface as well as the birds. - graphic.
    • Breakdown in percentages of various heat sources in the house - pie chart
    • Minimum tunnel fan capacity required to maintain 5 F differential betwen the pads and the fans
    • Approximate number of tunnel fans required
    • Average air velocity obtained with minimum recommended tunnel fan capacity.
    • Evaporative cooling pad area
    • Number of side wall inlets
    • You can change the minimum required tunnel fan capacity and the spreadsheet will calculate the pad to fan temperautre difference.
  • It is important to note that t he spreadsheet determines the minimum amount of tunnel fan capacity required to maintain at most a 5 F temperautre difference between the inlet and fan ends of the house.   Additional fan capacity is often required to increase the velocity to produce sufficient bird cooling.