Bulk storage tank monitoring including evaporative loss assessment

摘要

A method of storage tank monitoring including calculating liquid inventory within the storage tank. Real-time parameters associated with evaporative loss of a liquid stored within the storage tank are determined to produce input data. The real-time parameters include at least one condition within the storage tank and at least one environmental condition. Evaporative loss is automatically calculated with an inventory calculation algorithm using the input data and at least one known physical property of the liquid in the storage tank.

主权项

1. A system for monitoring a hydrocarbon liquid mixture stored within a storage tank, comprising:
a plurality of sensors installed on said storage tank including a product level sensor, liquid temperature sensor, vapor temperature sensor, and vapor pressure sensor proximate to said storage tank for determining real-time parameters associated with evaporative loss of said hydrocarbon liquid mixture, and wherein said storage tank is available for transferring said hydrocarbon liquid mixture into or out of said storage tank; and a computing device communicably connected to receive data from said plurality of sensors implementing an inventory calculation algorithm stored in an associated non-transitory memory that uses said real-time parameters and at least one known physical property of said hydrocarbon liquid mixture as input parameters, wherein said inventory calculation algorithm automatically calculates in real-time at least one of a calculated measure of static evaporative mass loss and a calculated measure of dynamic evaporative mass loss from said input parameters occurring when said storage tank is breathing through a breather vent and said hydrocarbon liquid mixture is being transferred into and out of said storage tank.