Corrections

>> Power ‚ energy. Inadvertently, the units of energy and power (rate of using energy) were confused in the third- and second-to-last paragraphs of "Sugar mill is 'sweet' application for medium-voltage drive," Application Update, Control Engineering, Jan. '04, p. 9. Conclusions and payback figures remain unchanged.

02/01/2004


>> Powerenergy. Inadvertently, the units of energy and power (rate of using energy) were confused in the third- and second-to-last paragraphs of "Sugar mill is 'sweet' application for medium-voltage drive," Application Update, Control Engineering , Jan. '04, p. 9. Conclusions and payback figures remain unchanged. The correct text follows:

"The previous turbine used 48 pounds of steam per hour for every kW of power, while the new, efficient electrical motor and drive system uses only 16.2 pounds of steam per kWh to provide 1,420 kW of electrical power.

Power consumption of the electrically driven mill is approximately 550 kW, leaving roughly 870 kW for sale to the utility. At US$0.055/kWh, this meant additional revenue of $158,480 in six months of harvest time..."

In other words, steam usage should have units of lb/kWh, not lb/kW; power generated/used should be kW, instead of kW/hr; and electrical cost should be $/kWh, not $/kW.

>>QSI Corp.'s Qterm-G70 graphics terminal with power over Ethernet technology was misspelled in the "Product & Software" section on page 49 and on the cover of Control Engineering , Dec. '03.

>>A headline about Magnetrol International's Eclipse Model 707 two-wire, loop-powered radar level meter was misspelled in Control Engineering 's Editors' Choice Awards supplement, Jan.'04, p.S12. The headline should have read "Loop-powered radar measures interface, level."





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Motor specification guidelines; Understanding multivariable control; Improving a safety instrumented system; 2017 Engineers' Choice Award Winners
Selecting the best controller from several viewpoints; System integrator advice for the IIoT; TSN and real-time Ethernet; Questions to ask when selecting a VFD; Action items for an aging PLC/DCS
Robot advances in connectivity, collaboration, and programming; Advanced process control; Industrial wireless developments; Multiplatform system integration
Motion control advances and solutions can help with machine control, automated control on assembly lines, integration of robotics and automation, and machine safety.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
click me