Report No. 041620-02
- Benefits
- Direct Drive PMSM Motor
- Lowest Weight
- Active Power Factor Corrected
- Industry
- Industrial
- Location
- India
- Product
- Epoch 20-ft 5-Blades 81 RPM HVLS Fan with Epoch 2.0 Motor and Controller - 90Nm / 0.8kW / 1.1hp
Problem
- CST, Mumbai is one of the busiest railway platforms in India. Large numbers of people travel through CST Mumbai every day.
- In such a crowded place, physical comfort is a crucial factor. The temperature in Mumbai is also very high during summer.
- To make visitors comfortable, strong air movement is required to create physical comfort.
- However installing HVAC systems in such a large railway station is not affordable and the energy consumption of HVAC systems is extremely high.
- To get better results while using less energy, CSMT officials proposed installing HVLS fans in the railway station.
Solution
- Epoch 2.0, 20-ft (3-Blade) fan was installed with the following specifications:
-
- Motor : Epoch 2.0
- Coverage Area : 15,400 Sq. Ft. (1,430 Sq. m)
- Speed : 81 RPM
- Peak Power : 1.1 kW / 1.5 hp
- Epoch 2.0 20-ft diameter fans are widely used because of their excellent airflow and energy efficiency.
A site survey is mandatory before recommending any HVLS fan installation. The survey revealed the following dimensions:
- Total Area : 705 ft × 250 ft = 176,250 Sq. ft
- Floor to Ceiling Distance : 22 ft – 26 ft
- Fan Diameter Rule : Distance / 1.5 gives approximate fan diameter
- Recommended Fan : 20-ft HVLS Fan
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 equipped with active power factor correction and unity power factor.
Therefore the Watts (real power) and VARs (apparent power) are almost the same.
The power was captured at speeds of 40, 50, 60, 70 and 80 RPM.
Power drawn at these speeds was 142 W, 225 W, 330 W, 515 W and 714 W respectively.
The chart also shows trend lines generated using Excel to account for measurement errors because fan power consumption can be modeled by well known equations.
Input Current Report
Input current was measured at speeds of 40, 50, 60, 70 and 80 RPM.
Input current values recorded were 0.61 A, 0.945 A, 1.375 A, 2.13 A and 2.96 A respectively.
The input voltage varied from 230 V to 240 V during the measurement.
Air Flow Report
Airflow was measured from the center of the fan and recorded at every 3-ft distance.
Measurements were taken up to 30-ft from the center of the fan.
Air velocity values recorded were 334, 452, 433, 511, 492, 450, 450, 393, 393 and 334 ft/min at distances of 3, 6, 9, 12, 15, 18, 21, 24, 27 and 30 ft respectively.
This is the photo of the finished installation.
