Customer Posted October 30, 2018 Report Share Posted October 30, 2018 Hi, Our fans are built into bulkheads. Do I need to restrict the area of the tunnel? C. Link to comment Share on other sites More sharing options...
Florian Michelin Posted October 30, 2018 Report Share Posted October 30, 2018 Hi, Fans in an airway are always considered as being in a bulkhead. All the air will have to go through the fan. You do not need to add additional resistance. If you wish to use your as a jet fan, hanging from the ceiling, select your fan and tick the box right of the fan selection.If you wish to use your as a jet fan, hanging from the ceiling, select your fan and tick the box right of the fan selection. Link to comment Share on other sites More sharing options...
Craig Stewart Posted December 31, 2018 Report Share Posted December 31, 2018 By default Ventsim assumes the velocity pressure on the discharge side of the bulkheaded fan is recovered and contributes to the total pressure added to the model. In reality, some or all of the discharge velocity pressure may be lost due to turbulence and shock loss, particularly if the fans are installed without an efficient discharge cone or in a area where the discharge flow is disrupted (around a bend for example). Effectively this means only the Fan Static Pressure portion may be contributing to the mine pressure. If you wish to consider these losses, and you are using FAN TOTAL PRESSURE CURVES you can either add an installed fan resistance factor (available in the fan database settings) and apply an EXIT SHOCK LOSS factor of between 0 (no loss) and 1 (full loss of velocity pressure). Alternatively, to do this globally for all booster/bulkheaded fans, there is a setting in the SETTINGS > SIMULATION > AIRFLOW > FAN LOSS FACTOR where fans in the model are applied with a discharge velocity pressure loss factor (between 0 - 1) Link to comment Share on other sites More sharing options...
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