Anyone responsible for selecting or operating industrial axial flow fans needs some basic knowledge of fan design and utilization in order to make optimum decisions. Moore has prepared a number of short technical articles, one printed page or less, covering these basic subjects. We hope you will find these "Tech NOTES" helpful. For more in-depth information, select see “Engineering Papers” section below.
TECH NOTES:
- HOW TO RECOGNIZE A HIGH-EFFICIENCY FAN Describes the complex blade shape necessary to provide uniform flow, the most important requirement of a fan wheel.
- WHY MOORE FANS HAVE TWO HUBS Explains the considerable difference between the aerodynamic and structural requirements of a fan hub.
- METHODS FOR MODULATING AIRFLOW Compares the three common methods for reducing airflow as conditions permit, to reduce power use and lower noise level.
- HOW TO SELECT A LOW-NOISE FAN Noise level calculation formulae indicate performance considerations for reducing noise and other means of lowering noise are discussed.
- THE ADVANTAGES OF RESILIENT "HELICOPTER" BLADES Discussion of the reduction of stress and the avoidance of critical speeds using variable-speed motors.
- COOLER UPGRADING: A TIMELY TOPIC
ENGINEERING PAPERS:
- THEORY OF RATING The basic definitions and formulas used in fan selection.
- FAN DESIGN Considerations in the design of axial flow fans for high energy and efficiency.
- RESONANCE OF PIVOTED BLADES Calculation of resonant frequencies for Moore fans with pivoted fan blades.
- NOISE LEVEL PREDICTION Gives formulas used by Moore to predict noise levels at user-defined locations and for multiple aerial cooler fans.
- MODULATING AIR FLOW Gives formulas that can be used to estimate horsepower, PWL and SPL resulting from modulating air flow.