St. Francis Inter College, UP, India
A Case Study : Epoch 2.0 HVLS 14-ft Fan By Falco eMotors Inc.
Report No. 031720-01
233%
Saving on Electricity
2 X
Get 2 x Airflow
<35 dBA
Lowest sound in the World
Key Facts
Benefits
- Direct Drive PMSM Motor;
- Lowest Weight;
- Active Power Factor Corrected;
Industry
- Industrial
Location
- India.
Problem
- Auditorium at St Francis Inter College hosts numerous events including annual day award functions & Inter School Competitions.
- Many students sit near each other. Such an arrangement generates heat. It is critical to continuously circulate air to dissipate the heat.
- Such an arrangement provides a substantial blockage for airflow. Therefore the students feel uncomfortable.
- In this auditorium, the volume of air to be circulated is very substantial.
- And at the same time, It is not easy to place air circulating outlets in the floor of such a seating area at appropriate locations.
- The end-user wanted to increase air circulation with low noise levels.
- Low noise levels are critical so as not to interfere with the hearing of persons seated in the auditorium.
Solution
- Epoch 2.0, 14-ft 01 Fans was installed with the following specifications ;
-
- Motor: Epoch 2.0;
- Coverage Area: 8,000 Sq. Ft. (743 Sq. m);
- Speed: 120 RPM;
- Peak Power: 1.1 kW/1.5 hp;
- Epoch 2.0, 14 ft fans are most popular with amazing airflow and airflow efficiency.
Site Survey
A site survey is mandatory before any HVLS fan recommendation. The survey revealed the following dimensions:
- Total Area: 53.7 Ft X 102 Ft = 5,477 Sq. Ft.
- Floor to Ceiling Distance: 20 to 24 ft,
- By a rule of thumb distance/1.5 gives us the approximate fan diameter.
- In this case, we chose to go with a 14-ft fan.
Site Measurements
Test Reports
Three test reports are collected for each fan installation as follows:
Power Consumption Report
Power consumption report captures the real as well as apparent power. Epoch HVLS fans are the only fans in the world to have active power factor correction and unity power factor. Therefore the Watts (Real Power) and VARs (the apparent power) are almost the same. The power has been captured at 80, 90, 100, 110, and 120 RPM. Power drawn at those speeds are 325, 418, 560, 805, and 945 W respectively. The chart above also shows trend lines generated using Excel for real and apparent power to take into account any measurement errors as fan power consumption can be modeled by well known equations.
Input Current Report
The input current is also measured at 80, 90, 100, 110, and 120 RPM. Input current is recorded as 1.15, 1.8, 2.2, 2.86, and 3.7 A respectively. The input voltage varied from 230 to 240V during the measurement.
Air Flow Report.
The airflow is measured from the center of the fan and is recorded at every 3-ft distance. Values were recorded upto 30-ft from the center of the fan. The values were respectively, 195, 215, 350, 668, 650, 595, 570, 490, 350, and 330 ft/min at distances of 3,6,9,12,15,18,21, 24, 27, and 30-ft respectively.
Finished Installation
This is the picture of the finished installation.