Press

Flow Rate & System Operations

Knowing the flow rate within a fluid piping system is one of the most useful measurements in understanding system operations. The equipment used to measure flow rates is typically maintained and calibrated by the plant instrumentation and control groups. Facility flow meters typically monitor custody transfer or are used as the primary elements of flow control circuit.
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Using Overtime In Ship Deballasting Operation

Ship ballasting and de-ballasting are critical to a ship’s stability, and a major part of ship and port operations. Here, we examine the current procedures and potential issues that can arise when a quick turnaround in port is required. Through time-based modeling of the ship’s systems, new methods were used to analyze the feasibility of each scenario as well as ensure the systems were operating optimally. After rigorous testing, a new approach was developed to decrease time in port, increase system reliability/safety, and improve overall efficiency.
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Proper Pump Selection: Avoid Oversizing Your Pumps

Proper pump selection is more important than ever, with drastic consequences on maintenance, reliability, and efficiency. The selection process remains difficult for average users, and even contracting the work out to a reputable engineering firm does not guarantee success. In this article, we will cover centrifugal pump design, common pitfalls in the selection process, and consequences of improper selection.
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5 Strategies for Handling Differing System Conditions

Last month, we discussed how a constant volume heating, ventilation and air conditioning (HVAC) system would continually pump the same flow rate of chilled water through the entire system regardless of the cooling load. This worked well when maximum cooling was needed on a hot day, but during times of low cooling load, much of the chilled water would go through the bypass. This method allowed the system to be controlled, but at a high cost. Also discussed was how centrifugal pumps connected to variable speed drives (VSD) could be used to reduce the pumping cost in a chilled water system by varying the flow rate through the system to match the system’s cooling loads.
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Meter and Orifice Sizing

PIPE-FLO® Professional version 16.1’s new orifice and meter sizing functionality allows users to quickly determine the appropriate device size needed based on desired requirements. Meter and orifice calculations are performed in PIPE-FLO® in accordance to the following standards: ASME MFC-3M-2004 Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi, as well as ASME MFC-14M-2003 Small Bore Precision Orifice Meters.
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