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What is Tunnel
Ventilation?
Tunnel ventilation for dairy
barns is a technique proven to overcome the summer time ventilation challenges
that exist in many tie stall and freestall barns. With a tunnel system, fresh
air is drawn into a barn through an open endwall by a slight negative pressure
that is created by operating exhaust fans (called tunnel fans) mounted at the
opposite endwall. The floor plan of a basic tunnel ventilation system is shown
below.
This program will allow you to:
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Design a tunnel ventilation
system for a freestall or tie stall facility based on a large selection of fan
choices (Fan performance data shown is based on unbiased test results for
selected fans at the University of Illinois at Urbana Champain Bess Lab). You
can also input your own fan data as desired for use in system design.
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Determine the annual cost for
owning, operating, and maintaining the designed system.
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Predict the amount of daily milk
production required per cow in order to achieve a break-even return on
investment by running a simple cash flow analysis.
Steps you'll take through the
program:
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Step 1:
Choose barn type.
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Step 2: Enter
barn and farm data.
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Step 3: Choose
fan models.
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Design Summary:
This is an intermediate report giving tunnel ventilation design information
based on your input for Steps 1-3.
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Step 4:
Enter economic information.
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Final Report:
This report will give an economic report and will also contain the information
included in the Design Summary.
Computer Tips:
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This program is best viewed
using Internet Explorer.
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The program will guide you from
one page to the next. We suggest you follow the process through to the "Final
Report" page.
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If you need to change a value on
a previous page, use your brower's "back" button. Once you make the change, be
sure to hit "submit" at the bottom of the page. Otherwise, the program
will not use the updated value in its calculations.
For more information.
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Visit the
PRO-DAIRY PROGRAM website for
reference information on tunnel ventilation. Related papers include: |
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Tunnel Ventilation for Freestall
Barns
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Natural or Tunnel Ventilation of
Freestall Structures: What is Right for Your Dairy Facility?
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Economics of Tunnel Ventilation
for Freestall Barns
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Time Integrated Value
Environmental Control Technology: Step Up to the Times
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