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Don Bosco University, Guwahati, Assam, India

Don Bosco University, Guwahati, Assam, India.

A Case Study Epoch HVLS 20-ft Fan By Falco eMotors Inc.

Report No. 032720-01

203%
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.

Product

Problem

  1. The atrium in tapesia campus of Don Bosco University is located in the center of a building as a result the openings at lower levels are not available.

  2. The tapesia atrium design with natural ventilation but In summer The atrium fills with warm air from the adjoining storeys. this air is further warmed by direct solar heating in the atrium due to this condition occupants feel uncomfortable.

  3. In this space the air movement is actually driven by the re-circulation rather than the direct main flow from the wind.

Solution

  • Epoch 2.0, 20-ft 02 Fans was installed with the following specifications ;
    • Motor: Epoch 2.0;
    • Coverage Area: 18,000 Sq. Ft. (1,672 Sq. m);
    • Speed: 60 RPM;
    • Peak Power: 1.1 kW/1.5 hp;
  • Epoch 2.0, 20 ft Fan is one of our most popular fans 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: 130 Ft X 60 Ft = 7,800‬ Sq. Ft.
  • Floor to Ceiling Distance: 30 to 35 ft,
  • By a rule of thumb distance/1.5 gives us the approximate fan diameter.
  • In this case, we chose to go with a 20-ft fan.

Site Measurements

Fans and coverage area

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 20, 30, 40, 50, and 60 RPM. Power drawn at those speeds are 440, 560, 690, 877, and 970 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 20, 30, 40, 50, and 60 RPM. Input current is recorded as 1.9, 2.97, 3.24, 3.98, and 4.8 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 33-ft from the center of the fan. The values were respectively, 197, 207, 208, 234, 241, 234, 202, 180, 171, and 160 ft/min at distances of 3,6,9,12,15,18,21, 24, 27, 30, and 33-ft respectively.

Finished Installation

These are pictures of the finished installation.