Hi E Community Blog Portal Expedia Initiative. : Hi Weeks Asked Bobble!

8 Mar 2014

Hi Weeks Asked Bobble!

Hi Weeks Asked Bobble!

Hi Before We Ask! Whats A Bobble? Lets Introduce What's Made Us Bobble In The Industry This Week!

Hi Topic: Test Block In AMCA Standard!

Hi Issue: AMCA specifies the term "Test block" as a design point of fan.

Hi Question: Please advise the meaning of this "Block".

Hi Meaning:

- "In addition to the fundamental volume specifications, combustion process fans, particularly larger fans, are often specified for two conditions . . . actual and test block.

The actual condition is the calculated volume (including excess air) and pressure requirements.

The test block condition is a theoretical duty that includes some safety factor beyond the actual volume and pressure requirements.

The fan selection for the application should be capable of meeting both conditions with good efficiency, economy, and stability.

Whenever possible, the actual condition should represent the most efficient point of operation for the fan selected for the application. "

Click link here or image above to visit AMCA Homepage.

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AMCA Green Tip #2

Green Tip #2 : Minimize System Effect in Air System; Conventional air-system design processes result in an ideal fan type, size, and speed for ideal conditions. But in the field, actual conditions are often less than ideal. Air Movement And Control Association International, INC.

Obstacles to duct runs lead to sharp turns or changes in elevation, and then another correction to resume the planned path. Or, there might not be enough room for the ideal length of inlet or outlet duct to establish fully developed airflow. The results of less-than-ideal fan conditions are summarily called system effect. Visit AMCA Website Click Here.

Hi Fans & Blowers Checklist

This section lists the most important energy efficiency options:

ƒ -Use smooth, well-rounded air inlet cones for fan air intake.

ƒ- Avoid poor flow distribution at the fan inlet.

ƒ- Minimize fan inlet and outlet obstructions.

ƒ- Clean screens, filters and fan blades regularly.

ƒ Minimize fan speed

ƒ -Use low slip or flat belts for power transmission.

ƒ -Check belt tension regularly.

ƒ -Eliminate variable pitch pulleys.

ƒ -Use variable speed drives for large variable fan loads.

ƒ -Use energy-efficient motors for continuous or near continuous operation.

ƒ -Eliminate leaks in duct works.

ƒ -Minimize bends in duct works.

ƒ -Turn fans and blowers off when not needed

ƒ -Reduce the fan speed by pulley diameter modifications in case of over sized motors.

ƒ -Adopt inlet guide vanes in place of discharge damper control.

ƒ- Change metallic / Glass reinforced plastic (GRP) impeller by more energy efficient.

-hollow FRP impeller with aerofoil design.

ƒ -Try to operate the fan near its best operating point (BEP).

ƒ -Reduce transmission losses by using energy efficient flat belts or cogged raw-edged V belts instead of conventional V-belt systems.

ƒ -Minimizing system resistance and pressure drops by improving the duct system.

ƒ -Ensure proper alignment between drive and driven system.

ƒ -Ensure proper power supply quality to the motor drive.

ƒ -Regularly check for vibration trend to predict any incipient failures like bearing damage, misalignment, unbalance, foundation looseness etc.

Hi Focus on ASHRAE Standards.

ASHRAE writes standards for the purpose of establishing consensus for: 1) methods of test and classification standards 2) design standards, 3) protocol standards; and 4) rating standards (in limited cases). Consensus standards are developed and published to define minimum values or acceptable performance whereas other documents, such as guidelines may be developed and published to encourage enhanced performance. ASHRAE does not write rating standards unless a suitable rating standard will not otherwise be available. To Visit The ASHRAE Web Site Here. Click this link which Contains the complete library of ASHRAE standards, guidelines, and user's manuals to View & Download .pdf file.

8 Mar 2014

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8 Mar 2014

Hi Weeks Asked Bobble!

No comments :

Post a Comment

Hi Twelve Great Articles and Resources for Legionella and Water Treatment.

Hi Translate Linguistic Hi Proverb Tool.

(Hi) - Visit The New Digital World.

Ambient Air Quality Monitoring / Continuous Emissions Monitoring / Process Control / Data Handling.

Hi Air Pollution Engineering!.

Hi Regulations, Pollution Engineering!.

Hi Wikipedia Search.

Hi Bloggers Contact Form.

Hi ' Graduate School at the Centre for Alternative Technology!.

Hi Water Technology

Hi Subscribe To Hi E Community Feeds

Demand for OPEC crude in 2014:

The Hi Digital Magazine!.

Hi Total Pageviews.

Events @ GulfOilandGas.

Hi Clean Energy.