[Air Conditioning Energy Saving Office Note 12] Difference Between Rated Current and Rated Power Consumption
Organizing commonly used reference values for air conditioning energy-saving measurements in an easy-to-understand manner.
When evaluating the energy-saving performance of air conditioning units, the "rated values" published by manufacturers are an essential standard. However, rated values are merely guidelines under standard conditions and can vary significantly from actual operating conditions. This time, we will clarify the differences in the roles of "rated current value (A)" and "rated power consumption (kW)," which are frequently used in energy-saving measurements, and explain how to utilize them in the field. 1. Role of "rated current value (A)": Visualizing the load on the air conditioning unit The rated current value is an estimate of the current that flows when the air conditioning unit operates under standard conditions. Main use: It is used as a reference value to calculate the "operating load" on the equipment. How to use: By dividing the measured average current value by the rated current value, you can calculate the "current load ratio." Calculation formula: Current load ratio = (Measured average current value ÷ Rated current value) × 100 Note: In the case of inverter units, the current value fluctuates during actual operation, so comparing it with measured data is important.
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2. Role of "Rated Power Consumption (kW)": Understanding Costs Rated power consumption is an estimate of the power consumed when operated under standard conditions. Main Uses: It is used as a basis for estimating electricity costs and understanding power usage. How to Utilize: By dividing the cooling capacity by the power consumption, you can calculate the "COP (Coefficient of Performance)," which indicates the efficiency of the equipment. Formula: COP = Cooling Capacity ÷ Power Consumption
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The rated values are merely "reference values" from a design perspective, and the actual operating values fluctuate constantly due to outside temperature, room temperature, and daily operational conditions. To aim for energy conservation, it is essential to accurately estimate and compare the on-site load conditions and electricity usage using these reference values. We specialize in proposing optimal air conditioning operations based on on-site load diagnostics. If you have challenges such as "wanting to analyze the load of air conditioning units from actual measurement data" or "wanting to accurately understand unnecessary electricity costs," please feel free to contact us.
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AIP Corporation provides eco-friendly and comfortable solutions for social and living environments, focusing on air conditioning. 〇 Air Conditioning Business We handle the sales, installation, and maintenance of air conditioning equipment for new construction and renovation projects in stores, supermarkets, drugstores, hospitals, nursing facilities, hotels, buildings, factories, and residences, as well as for the replacement and upgrade of air conditioning units. 〇 Energy Conservation Business We propose plans to reduce energy costs for our customers' facilities through various methods such as equipment performance recovery devices, indoor control systems, and visualization, achieving reductions in running costs and CO2 emissions. 〇 Aqua Power Business We produce and sell a weakly acidic hypochlorous acid water solution called CELA. We offer suggestions on how to utilize CELA and provide support in terms of hygiene management. Additionally, we handle special purification materials and water purifiers.
