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Ammonia-Based Evaporator in a Cold Storage Warehouse

The owners of a large cold storage warehouse alleged that the ammonia-based evaporators in the ceiling-mounted chiller units were not performing up to the manufacturer's original specifications. The equipment manufacturer's insurance company retained APTECH to evaluate the performance of this equipment. APTECH prepared a test plan, and then installed thermal measurement instrumentation on one of the ceiling-mounted evaporators. All of our test activities, which took place in a -10°F environment, were closely monitored by consultants hired by the plant. The test data indicated that there were inadequacies in the plant's overall system design and operating procedures, rather than problems with the chiller's evaporator.

Satish Almaula		Plant failure and root cause analysis; process and design engineering analysis; process technology development and testing; plant engineering, operations, maintenance and safety management; plant and process control system management.

Kimble Clark, Ph.D.		Failure analysis, heat transfer & thermodynamics, process plant equipment failures & explosions, fuel science, combustion, industrial fires and explosions.

Richard Schreiber, P.E.		Machinery and mechanical device failure analysis, mechanical testing, combustion and heat transfer, industrial fires and explosions, gas appliances.

Eric Sullivan, P.E.		Metallurgy, welding, failure analysis, fire and explosion investigations, equipment, piping.

Philip Lindsay, P.E.		Corrosion failure analysis, metallurgy, piping systems, corrosion mitigation, materials selection.