ESI In The News

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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Using Fluid Piping Software to Design Energy Efficient Pumping Stations

The need for water and wastewater capacity is continually growing on a global scale, and with rising energy costs and a greater emphasis on being green, the users and designers of pumping systems in this industry are realizing the need for more efficient designs and practices. It is estimated that water/wastewater facilities account for 35 percent of typical municipal energy budgets 1. With pumping systems responsible for much of this power consumption, design optimization can result in significant energy savings.
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Engineered Software, Inc. Announces New Website Launch

January 15, 2018 - Lacey, Wash., - Engineered Software, Inc. has recently launched its new website; the first in 3 years. The newly-branded site aims to introduce and educate customers in piping and pumping technology innovation. PIPE-FLO® Professional and PUMP-FLO® are world-leading tools that capture new opportunities for profitable growth in multiple disciplines and industries.
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HVAC System Control: Addressing Thermal Load in Variable Volume Systems

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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Controlling A Piping System

This is a continuation of a series of articles on understanding the operation of fluid piping systems. We previously discussed how a piping system consists of three elements working together to achieve the system’s objectives. The pump element adds energy to the fluid to overcome the static and dynamic head of the process elements in the system. These process elements, such as tanks, heat exchangers, strainers, pipelines, valves and fittings, require a certain amount of energy to deliver the fluid to make the products or provide the services at the desired production rate.
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System Approach & Modeling Lead to a Reduced Impeller Diameter

In industries where pumps are widely used, significant savings may be achieved with a better understanding of how the system can be optimized. In my discussions with personnel at process plants, an individual or small group is usually responsible for reducing energy consumption for the plant. This process may result is some savings in electrical power consumption, but additional improvements are overlooked because the focus is not on the total picture.
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