Intelligent Pressure Scanners Enhance Chillers

To help build more efficient centrifugal compressors for its chillers, McQuay International recently researched the thermodynamic state of HFC-134a refrigerant throughout the compression process at its plant in Staunton, Va. The company discovered that conventional equipment was expensive and difficult to use, but eventually found and incorporated System 9000 in...

03/01/1998


To help build more efficient centrifugal compressors for its chillers, McQuay International recently researched the thermodynamic state of HFC-134a refrigerant throughout the compression process at its plant in Staunton, Va. The company discovered that conventional equipment was expensive and difficult to use, but eventually found and incorporated System 9000 intelligent pressure scanners from Pressure Systems Inc. (PSI, Hampton, Va.).

PSI's microprocessor-based, multichannel devices take multiple pressure measurements in conjunction with a direct PC interface. They can also be daisy-chained and networked to form a low-cost distributed data acquisition system.

However, because these scanners had never been used in an application where they were directly exposed to a refrigerant, the two companies agreed to test PSI's Model 9010 for its ability to meet McQuay's needs. Despite the new medium, the scanners delivered accurate pressure measurements throughout the trial. This gave McQuay a new alternative to mechanical pressure scanners or discrete transducer equipment.

For more information, visit www.controleng.com/info .





No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Combined heat and power; Assessing replacement of electrical systems; Energy codes and lighting; Salary Survey; Fan efficiency
Commissioning lighting control systems; 2016 Commissioning Giants; Design high-efficiency hot water systems for hospitals; Evaluating condensation and condensate
Solving HVAC challenges; Thermal comfort criteria; Liquid-immersion cooling; Specifying VRF systems; 2016 Product of the Year winners
Driving motor efficiency; Preventing Arc Flash in mission critical facilities; Integrating alternative power and existing electrical systems
Putting COPS into context; Designing medium-voltage electrical systems; Planning and designing resilient, efficient data centers; The nine steps of designing generator fuel systems
Designing generator systems; Using online commissioning tools; Selective coordination best practices
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
click me