Last Updated: April 16, 2010
Charge Management Tool
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For end-users that operate industrial refrigeration systems using anhydrous ammonia as the refrigerant, estimating and documenting the normal and maximum refrigerant inventory takes on heightened importance. The heightened importance is attributable to regulations that govern the use of toxic substances (including anhydrous ammonia) in industrial processes.
The two most significant regulations that arise in this case are OSHA’s Process Safety Management (PSM) standard and EPA’s Risk Management Program (RMP). In cases where the quantity of refrigerant exceeds a defined maximum limit, end-users are required to comply with the provisions of both the PSM and RMP standards. Even in cases where the total inventory of a system is less than the threshold quantity, inventory calculations are still useful for assessing process risks.
This tool can help estimate the amount of charge in your refrigeration system. It does so by calculating each individual piece of equipment, given input parameters. This equipment can be organized into areas, and reports can be compiled.
The formulas used for each calculation have been developed by IRC Associate Scientist Todd Jekel, based on rules of thumb commonly used in the industry. The interface was developed by Mark Geurts.
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