GES Automatic Sash Closer Presentation

Automatic Sash Closer for Chemical Fume Hoods : 

Automatic Sash Closer for Chemical Fume Hoods

Why use an Automatic Sash Closer?: 

Safety: When operators are not present any materials left in the fume hood will be enclosed Energy efficiency: Chemical fume hoods use roughly the same amount of energy as a small home. Leaving a sash open when not in use is similar to leaving windows open in a home. By closing the sash door while not in use, energy consumption will decrease by up to 65%. Cost Savings- Our systems are cost effective and offer a typical payback period of 12 to 18 Months. Why use Green Exhaust Systems: We offer preferred pricing on the very best equipment, customized instillation and service, and second to none follow up. Why use an Automatic Sash Closer?

The Components: 

Motor Clutch Assembly: When the operator stands in front of the fume hood the personnel detector will recognize their presence and reset the controls so that the drive is disconnected via the clutch mechanism. The operator can then operate the sash manually in the normal manner. When the operator leaves the fume hood the personnel detector recognizes this and will initiate a pre-set rundown time (adjustable on site). When this time delay is satisfied the sash will drive to the closed position only if the sensors detect that there is no objects present. If any objects are present or enter the safety light curtain field then the drive will disconnect and the sash will stop. It will also stop if it detects that the operator has returned. As an additional safety feature the controls know the time in which it takes for the sash to drive to the closed position. If for any reason the sash does not closed within this time period the drive mechanism will disengage and activate the alarm. The unit will remain disengaged until the problem has been resolved and the pushbutton has been pressed to reset the system. During this time the sash can be operated manually. The Components

Motor Clutch Assembly : 

Motor Clutch Assembly

The Components: 

Alarm Panel: Red LED/Pushbutton- Will give a visual indication of an obstruction/fault and is also used to reset the system once the fault has been cleared. There are two fault conditions : Sash Closing Time - The control system monitors the time the sash takes to close, if not closed within the preset time the fault indicator will illuminate and the sash drive will be disabled. Once the fault has been checked and cleared by pressing the reset pushbutton and the system returns to normal operation. Sash Obstruction - The control system has a safety light curtain sensor that can detect if the sash opening is clear of any obstructions before the drive operates. If an obstruction is detected the fault light will illuminate and the drive will be disabled. Once the obstruction has been cleared the operator simply presses the reset pushbutton and the system returns to normal operation . Light Curtain Transmitter and Receiver: The sash control system utilizes a safety light curtain comprised of an Infra Red transmitter and receiver on opposite sides of the inner fume hood chamber. They sit approx. 28” high and can detect very small objects including glass. The Components

Alarm Panel : 

Alarm Panel

Personnel Detector : 

Personnel Detector

Light Curtain Sensors: 

Light Curtain Sensors

PowerPoint Presentation: 

The System in Action Click on the Picture to play

Clutch Drive System: 

Click to Play Clutch Drive System

Glass Obstruction : 

Glass Obstruction Click to Play

Drive System: 

Drive System Click to Play

Sudden Obstruction : 

Sudden Obstruction Click to Play

Automatic Sash Closer Savings: 

Payback: 12-18 Months Typical cost savings of: $6 / CFM / Year* average reduction of 750 Typical Cost savings: $4,500 (750 cfm x $6/ cfm *) Installed Unit Cost: $5,100 * Results dependent on energy costs and environmental variables. We will calculate the actual results for each unit individually. Automatic Sash Closer Savings

Case Study: Midwest University: 

Case Study: Midwest University Scenario: Major University in the Upper Midwest Test unit Installed Install time: 4 Hours

Case Study:: 

Case Study: Investment/ROI Installed cost: $5,074 Pre Installation CFM: 1075 Post Installation CFM: 372 Average CFM Reduction 703 Total Savings: $4,488/ yr Payback Period: 1.2 years

What Next? : 

Site Visit Look at current equipment and ascertain usage Proposal Run ROI calculations and installation cost Installation Phased installation and other options Follow up Confirm ROI has been reached and actual energy savings is realized. What Next?

Questions?: 

Questions?

Contact Info: 

Contact Info Zach Harris O: 402.350.7009 C: 402.350.9100 E: zharris@greenexhaustsystems.com