© American Standard Inc. 1996 Fan Pressure Optimization The Trane Company.

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Presentation transcript:

© American Standard Inc Fan Pressure Optimization The Trane Company

© American Standard Inc Fan Pressure Control Methods s Fan outlet static pressure s Supply duct static pressure s Fan pressure optimization

© American Standard Inc Fan Pressure Control Static Pressure (in. wg) rpm A System Resistance At Design Conditions 24 Airflow (1000 cfm)

© American Standard Inc Fan Pressure Control Methods Fan Outlet Static Pressure Pressure Control Loop

© American Standard Inc Fan Pressure Control Methods Fan Outlet Static Pressure Static Pressure (in. wg) SPC= rpm, IGV 100% Open System Resistance At Design Airflow (1000 cfm) System Resistance At Part Load 1000 rpm, IGV Partially Open Fan Modulation Curve bhp C A

© American Standard Inc Fan Pressure Control Methods Supply Duct Static Pressure Pressure Control Loop Approximately 2/3 Down Duct

© American Standard Inc Fan Pressure Control Methods Supply Duct Static Pressure © American Standard Inc System Resistance At Part Load A System Resistance At Design Airflow (1000 cfm) 2418 Static Pressure (in. wg) SPC=0.80 Fan Modulation Curve 1000 rpm, IGV Partially Open 1000 rpm, IGV 100% Open D 12 bhp

© American Standard Inc Fan Pressure Control Methods Fan Pressure Optimization Communicating BAS Fan Speed Or Inlet Vane Position Duct Pressure Sensor Damper Positions

© American Standard Inc Fan Pressure Control Methods Fan Pressure Optimization A System Resistance Curve Airflow (1000 cfm) 2418 Static Pressure (in. wg) 1000 rpm, IGV Partially Open 1000 rpm, IGV 100% Open E 9.5 bhp

© American Standard Inc Fan Pressure Control Methods Fan Optimization Control Logic

© American Standard Inc Total Building HVAC Energy Fan Control Method Comparison MiamiMpls.SeattleToronto MiamiMpls.SeattleToronto Fan Outlet Control Duct Static Pressure Fan Pressure Optimization % HVAC Energy Consumption Analysis performed with TRACE® 600 building energy and economic analysis software.

© American Standard Inc Ventilation Reset And Fan Pressure Optimization Flow Control At ASHRAE OA Ventilation Reset With Pressure Optimization MiamiMpls.SeattleToronto Flow Control With Pressure Optimization % HVAC Energy Consumption Analysis performed with TRACE® 600 building energy and economic analysis software.

© American Standard Inc Ventilation Reset With Pressure Optimization System Requirements s VAV terminals with DDC controls s Air handler with controls s Ability of measure and modulate OA s Method of supply fan control s Building Automation System capable of solving ASHRAE Equation 6.1

© American Standard Inc s All zones properly ventilated at all loads s No zones are starved for air s Substantially reduced “system” operating costs s Nonproprietary system components s Faster system start-up and installation due to factory-installed and commissioned controls Ventilation Reset With Pressure Optimization Yields …

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