Featured Stories

Editor's Note

Summer Changes

A new look, plus news worth looking up. Oh, and a lung in a box.
Does this layout make our butt look fat? Notice a little something different about us last month? We had too many items on the plate to mention it at the time, but June marked the debut of our new redesign.
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Online Exclusive

Using Control Charts To Monitor Room Temperature

In this tale of setpoint sleuthing, the team at Slippery Rock University digs hard into the data to discover why and where the old BAS strategy was going wrong. See what the measurements and math turned up for various spaces in terms of culprits and recommendations.
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Staying Dry & Comfortable With Liquid Desiccants

Let a scientist with experience both at the National Renewable Energy Laboratory and on the manufacturer side discuss the possibilities of a newer dehumidification technology within the framework of the same old moisture challenges.
In the summer, conventional air-conditioning systems in buildings are challenged to meet peak humidity loads. Over time, buildings have reduced their heat (sensible) load, but have done less to reduce their moisture (latent) load. As a result, this moisture load can become too large for conventional air-conditioning systems to handle.
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Cover Story

Building On A Swedish Tradition

The American Swedish Institute looked homeward to plan for its future, using geothermal technology to achieve high-performance energy solutions in an urban setting.
Reflecting a long-established Swedish commitment to environmental stewardship, the Nelson Cultural Center addition at the American Swedish Institute (ASI) in Minneapolis integrates several technically advanced sustainable features, including a high-efficiency geothermal heating and cooling system that reduces energy consumption by nearly 30 percent (based on an ASHRAE 90.1 baseline) while supporting the Institute’s diverse community programming.
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Chillers Past, Present and Future

A couple of industry pros weigh in on how past ‘best practices’ sometimes get in the way of current potential, and on where technology might point.
We had an idea to try something different this month — invite chiller manufacturers to give us their insights on one of two topics. We invited them to either talk about common errors in project design/installation/O&M, with an eye toward helping readers get the intended performance out of their equipment. Or, they could write about what they see happening in this sector in the future. In a stroke of good luck, we had one response to each question. – Ed.)
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Calculated Conditioning: The IAQ Of UFAD

UFAD and displacement ventilation systems require accurate estimates to meet relative humidity requirements and ensure efficient operations. Take a look at a few design options, and contemplate the reader challenge at the end.
Since their introduction in Europe in the 1950s, and their domestic rise in specification during the 1990s, UFAD and displacement ventilation systems promise significant energy savings as a direct result of a higher supply air temperature that yields an increase in the use of economizer or free cooling hours.
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The Heat Is On But The CRACs Are Off... Now What?

With Hurricane Sandy fresh in our minds, let’s examine the anatomy of a recent outage’s immediate HVAC consequences as a guide toward protecting equipment in the future.
October 29 was a Monday. It was also the day that Hurricane Sandy made landfall in New York City. Around 7 p.m., Con Edison shut power off in Lower Manhattan, and it would be sometime Saturday before lights would begin to flicker back on.
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Bridging Schools And Eras with HVAC

With literal and figurative tight spaces handled, now new boilers, hydronics, pumping systems, and DDC all work together to impress and serve.
In today’s world, so-called “high-performance, sustainable” facilities are a dime a dozen. But many of these buildings rely on overly complex mechanical systems to carry out their mission.
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Sustainable Schools: Teaching By Example

See how Charlotte-Mecklenburg Schools weathered an economic downturn through efficiency, managing to use less energy while adding facilities.
Providing high-quality education for our nation’s children in grades K-12 has never been more important than it is today. The world is changing fast, and we need to provide an educational system that prepares them for this fast paced world in which we live.
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Ventilation To Improve IAQ In Schools

The author heads to the blackboard to break down fundamental outside air and sensor strategies (and how they can work together).
Providing high-quality education for our nation’s children in grades K-12 has never been more important than it is today. The world is changing quickly, and we need to provide an educational system that prepares them for this fast paced world in which we live.
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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
11/20/14 2:00 pm CDT

Key Issues in Selecting Emergency Back-up Generators

Join us for this webinar on key issues for selecting back-up generators, as well as the related critical components in the power chain of emergency power systems.

Engineered Systems Magazine

ES October 2014 cover

2014 October

Check out the October 2014 issue of Engineered Systems, with features on economizers, pump operations, and much more!

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