Category Archive for: «Energy Efficency»

How To Reduce Transformer Losses At Design Stage

Design changes to reduce transformer losses Design changes to reduce transformer losses, just as in a motor, always involve trade offs. For example, consider varying the cross-sectional area of the transformer core. An increase tends to lower no-load loss while raising the winding loss. An increase in volts per turn reduces winding loss while increasing […]

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Here is why you MUST use variable speed drives in pumping applications

Variable speed drives in pumping applications Pumping applications represent a significant opportunity for applying variable speed drives (VSDs) in new, as well as retrofit installations. The majority of pumping applications need to be controlled. It is unlikely that a pump will run continuously at a maximum speed. Variable speed drives are crucial when limiting the life […]

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3 Reasons For Increased Efficiency Loss In Rewound Motors

The loss in efficiency of rewound motors Approximately 300,000 motors are rewound in the UK every year, with an average rating of about 12 kW, so the efficiency of rewound motors is extremely important. The loss in efficiency on rewinding depends on the techniques, processes and skill used to perform the rewind, and is usually […]

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Why modern buildings MUST have energy metering and monitoring system

Greater energy metering and efficiency The first step to greater efficiency through energy metering and monitoring is to set objectives for the future system. Ideally, users of the system are involved in this process, and are given an opportunity to provide input on the main features to be included in the system. This step is […]

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8 Actions to Improve Energy Efficiency In Heating Systems

Energy efficiency of heating systems In many buildings, HVAC is the first or second item in terms of energy costs. This technical article deals with optimisation tips and energy efficiency savings in heating systems of a building. Heating systems in building Heating systems have always been used when the outside temperature drops below a certain […]

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Wiring practices to provide future load growth in buildings

Electrical wiring practices in buildings Electrical wiring is often installed without consideration for how the use of the space may change over time, particularly in residential building. This article recommends wiring practices that meet the NEC and provide for future flexibility and load growth in residential and nonresidential buildings. Let’s talk about wiring practices regarding the […]

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Identify these 4 things and lower facility’s electricity bill

Electricity bill and energy losses // The world is more energy conscious these days. But unlike you, most of the world doesn’t pay electricity bill that rivals the cost of a four bedroom home. You understand the need to know where energy is being expended in your facility and how you can make it more […]

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5 Factors That Mess Up Motor Efficiency and How To Improve It

Motor efficiency vs Energy losses It must be emphasised that the standard electric motor is already a very efficient device with efficiencies above 80% over most of the working range, rising to over 90% at full load. However, because of the high energy consumption, and the very large number of installed units, even a small increase […]

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7 Key Steps In Lighting Design Process

Structured Design Process // To achieve the best overall outcome in a lighting installation, it is important to avoid the tendency of rushing straight into luminaire selection before determining more broadly what is required from the system. The use of a structured design process helps to avoid this. The key steps in the design process […]

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7 Energy-Efficiency Improvement Opportunities In Lighting System

Lighting in industrial facilities There are a lot of opportunities to optimise lighting system in (almost) any industrial facility. Seven practical energy-efficiency opportunities to reduce energy use cost-effectively are given below: Lighting controls Replace T-12 tubes by T-8 tubes Replace mercury lights with metal halide or high pressure sodium lights Replace metal halide (HID) with high-intensity fluorescent […]

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