What To Know About Wire-to-Water Efficiency

This figure summarizes inefficient pumping causes and symptoms and potential EEMs. For the full article, visit the Pumps & Systems website.

(DENVER, CO – December 5, 2018) – Hazen’s Eric Dole recently had an article titled “What To Know About Wire-to-Water Efficiency” published in Pumps & Systems magazine.

The term wire-to-water efficiency has been used in the pumping industry for years, but what does it really mean? Simply put, it is a way to determine how efficiently an electromechanical system uses electricity to perform work, such as pumping. In hydraulic terms, it is the ratio of water horsepower (hp) output to true horsepower, or kilowatt, input to the motor.

Wire-to-water efficiency considers the efficiency of the pump, motor and variable frequency drive (VFD), if applicable, at a series of operating points that simulate historical conditions, so a baseline efficiency, or energy intensity in kilowatt-hour per million gallons (kWh/mg), can be established. The kWh/mg can then be compared to the other pumps in the system to determine which have the highest potential for energy savings and optimization.

Not only do users want feedback about inefficient pumps, they also want to know what may be causing the inefficiency, even if it is a high-level overview of items that should be addressed. These suggestions are called energy efficiency measures.

The full article can be found on the Pumps & Systems website.

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