Utility consumption list
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In the various consumption material tables for utility systems, what do the terms coincidence factor coefficient and coincidence flow rate mean?
For various consumable materials such as utilities (water, electricity, gas, air, nitrogen, …), there is a maximum usage level during the operation of each unit. However, if the maximum usage levels are taken into account in the design, the utility system will become extremely complex. The coincidence factor coefficient is a suitable value determined based on the operating characteristics of the equipment, to account for the consumption of various utility materials (for example, 80% of the maximum nitrogen usage is adopted for nitrogen); thus, 0.8 is the coincidence factor coefficient for nitrogen. The design amount calculated using this coefficient is the coincidence flow rate. Different devices consume materials for different utility services (water, electricity, gas, air, nitrogen, ...), and have different coincidence factor coefficients.