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Feature Articles
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 | Motors & Pumps: Airing the Options
For engineers designing pressurized air or vacuum systems, it’s important to understand that no single air-pressure or vacuum technology is optimal for all applications, as illustrated by the comparisons shown in Fig. 1 and Fig. 2. To help narrow down the choices, engineers can peruse charts for flow, pressure, and vacuum that are widely available from pump manufacturers. Before starting the process, however, it is helpful to be acquainted with the chief characteristics of the most common pump technologies used by equipment designers.
by David C. Droege
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 | Heating Elements: Conductive Clarity (July 2008)
Glass is a challenging material for designers to work with, but for applications with see-through requirements, glass is typically the material of choice. The challenge of designing with glass can become more pronounced in situations where the glass must be electrically heated – resistive heating elements must be applied to, or within, the glass without significantly interfering with its transparency. Fortunately, a number of suppliers offer solutions for such cases.
by Larry Adams
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 | Controls & Displays: Responsive Refrigeration (July 2008)
With
global energy prices soaring to record high levels and no end in sight,
appliance manufacturers struggle to find innovative and effective ways
to improve energy efficiency. Among the most energy-consuming and
expensive of all appliances are compressor-based heating and cooling
systems. These include living space heating, cooling and comfort
control equipment, as well as refrigerators and freezers that are
present in millions of households and businesses throughout the world.
And that is why any efficiency improvements to compressor-based
equipment can have a significant impact on both the end-users and
society as a whole.
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