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 Honeywell - KVAR Test #1: Executive Summary
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The KVAR Power Optimization Capacitors were installed on the chiller and chilled water pump at Apollo Elementary School in Titusville, Florida. A data logger was used for brief periods prior and after the installation, in order to measure the effects of the installation on the electrical power system. This report is to document the results of this test.
Conclusion - Actual savings for the retrofit were calculated as follows:
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ENERGY SAVINGS * |
COST SAVINGS * |
SIMPLE PAYBACK |
| Pump |
17,600 kWh |
$1,185 |
0.5 years |
| Chiller |
20,800 kWh |
$1,684 |
1.8 years |
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| * Yearly |
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Independent Electricity System Operator (IESO) - Efficient electricity usage a contributing factor to success.
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Molesworth Farm Supply Limited is a livestock feed manufacturing facility, located in the heart of dairy and hog country at the border of Perth and Huron Counties in southwestern Ontario. As Molesworth grew, management knew that the company was not using electricity as effectively as it could. The 20 motors used to grind, mix and transfer equipment for feed had a sub-standard power factor of 74 per cent to 77 per cent, whereas 90 per cent is considered the acceptable industry target.
Conclusion - Molesworth was able to recover the costs of the capacitors within 15 months – less than half the amount of time projected by the audit. “By taking control of our power factor, we have been able to pass on savings to farmers and put more money back into our company. Since 2002, Molesworth’s volume has doubled and more efficient electricity usage has been a contributing factor to our success,” said Coghlin.
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Georgian College - KVAR Test
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Recently two of our fifth semester students enrolled in the Electrical Engineering Technology Automated Systems program here at Georgian College in Barrie, Ontario requested a KVAR single-phase (Residential) and a three-phase (Industrial / Commercial) unit for testing. The request was made after I (Professor - Jackson S. Playne) viewed a demonstration of the KVAR single phase unit in operation at an Ontario Electrical League monthly meeting held in Elmvale, Ontario to a group of 30 personnel employed in the electrical industry.
Conclusion - In short, with what we have found, the PU-1200 when implemented properly can offer convenient household efficiency. It is a great way to decrease load demands from the supplier by the end-user, as bulk power correction has been used in the past to support this.
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WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY - VOLUME 32 AUGUST 2008
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| Improvement of Power Factor for Industrial Plant with Automatic Capacitor Bank |
This paper is intended to uplift the technological standard of industrial plants. The overall power factor of modern industries is very poor because of inductive loads absorbing reactive power. Especially, industrial plant with variable load conditions has large inductive loads and its power factor is very poor. These industries benefit most from automatic capacitor banks. This bank provides improved power factor, increased voltage level on the load and reduced electric utility bills.
Conclusion - If the power factor of the plant is low, it uses more power than it needs to do the work. Poor power factor should be
corrected as it substantially increases costs. Capacitors generally are the most economical means to improve power factors.
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| Typical Low Power Factor Industries |
| INDUSTRY |
UNCORRECTED POWER FACTOR |
| Saw Mill |
45% - 60% |
| Plastic |
55% - 70% |
| Machine Tools, Stamping |
60% - 70% |
| Planting, Textile, Chemicals |
65% - 75% |
| Hospitals, Foundries |
70% - 80% |
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U.S. Department of Energy Sept. 1980 - Section 2. - Comprehensive Picture of Losses
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| Classification and Evaluation of Electric Motors and Pumps |
There are two types of losses that are associated with electric motor design and operation - intrinsic losses and extrinsic (system) losses. Intrinsic losses occur internally to the motor and determine the efficiency with which motors transform electrical energy into mechanical energy; these losses can be affected only by motor design changes. Extrinsic losses occur externally to the motor, but are caused by factors inherent to motor design and operation which determine efficiency and power factor.
Conclusion - From this equation and the foregoing discussion, it is apparent that, as the efficiency and power factor are improved, motor line current will decrease, as will the motor's contribution to extrinsic losses.
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