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Building Automation

DDC Or Pneumatic?

Energy savings isn’t the only factor when considering a controls retrofit.
By Paul Ehrlich, P.E.
One Comment
Much of our work involves energy studies and retrofits to commercial buildings.
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Are There Hidden Problems In Your Hydronic Boiler Project?

Putting a new boiler in is a lot more complicated than just putting a new boiler in. You’re often taking ownership for any problem, real or potential, anywhere in the hydronics system.
By Ray Wohlfarth
No Comments
Designing a commercial boiler replacement where you were not the original designer or installer might have some hidden dangers that could haunt you for years.
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Tablet As Building Engineering Tool, Part 2: Designing

Reviewing documents, sizing equipment and systems, and sketching on the go: got an app for that? Also, we compare tablet vs. phone and the advantages or worries that come with taking your tablet into imperfect field conditions. How do you use yours?
By Jeffrey Seewald, P.E,
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After a brief hiatus, we are resuming exploration of the tablet as engineering tool. In the first article, we examined the energy study and how the tablet can facilitate tasks such as annotating existing documents, taking notes, and storing and accessing documents.
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Commissioning

Construction Phase HVAC Controls Coordination

Don’t be the team that finishes the building and then wonders why nobody brought the airflow measuring station.
By Rebecca Thatcher Ellis, P.E.
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HVAC systems continue to be the most challenging part of a new construction project to get right the first time, and the most challenging parts of the HVAC systems are their controls. I believe there are two root causes.
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Patient Rooms: CFD For Better IAQ

Can a location of air return affect the flow path of airborne pathogens in a patient room? Use simulations to manage the variables and improve the design in a space that is no room for error.
By Kishor Khankari, Ph.D.
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Air is the primary carrier of heat, moisture, contaminants, and airborne pathogens in patient rooms, isolation rooms, and operating rooms.
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Chiller Retrofit: The Attraction Of Magnetic Bearings

With multiple expansions and projects, a DC-area hospital also had to plan for cooling that could keep up with developing demands and spaces.
By Richard M. Heim, P.E., LEED AP and Paul J. Orzewicz, P.E.
One Comment

When the facilities management staff of Mount Vernon Hospital completed an assessment of its central chilled water plant, it became evident that while the original chillers had served the hospital well since its opening in 1975, they were ready for replacement.


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Building Automation

Building To Grid — AKA B2G

When it comes to the Smart Grid, are you prepared? Consider two design strategies to connect buildings to the available benefits.
By Paul Ehrlich, P.E.
No Comments
You’ve heard a lot of talk about the deployment of the Smart Grid. Most of the initial smart grid deployments are focused on the de-ployment of smart meters that enable utilities to gather usage information in near real time — or what they call Automated Meter Infrastructure (AMI).
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Calculated With Care: Ventilation in Health Care Systems

A Mississippi clinic needed above-average design on a budget. The equipment was nothing unusual. However, creativity and attention to detail uncovered opportunities to fine-tune the design and exceed ventilation benchmarks for less.
By Gary Hamilton P.E. and Ionel Petrus P.E.
2 Comments
Engineers’ daily challenges include calculations for outside air, supply air, and return or exhaust air flows — all while balancing mandated code requirements with owners’ expectations for performance, equipment first-cost, and future energy costs.
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The Tablet's Potential For Engineering Buildings

The first installment in this series introduces the collaborative tablet engineering experiment, and it establishes a roadmap for exploration of the tablet’s potential contribution to enhancing and streamlining our collective engineering endeavors.
By Jeffrey Seewald, P.E,
2 Comments
When I was a kid, programming on my Texas Instruments TI-16 and later on a Commodore 64, I was making simple games to play.
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Illuminating Info: UV-C For HVAC

Looking for lifecycle guidance or more extensive info for your stationary appli-cations? An industry IAQ veteran weighs in about the design, installation, commissioning, retrofit, and O&M of ultraviolet systems for commercial HVAC equipment.
By Forrest Fencl
No Comments
Feedback from potential users of UV in HVAC equipment suggests that many are confused about its use
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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
9/25/14 2:00 pm EDT

Test Anxiety? Learn How and When to Test Your Standby Generator

This webinar will discuss generator reliability, testing, and troubleshooting from a practical perspective and make recommendations for a comprehensive inspection and testing program.

Engineered Systems Magazine

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2014 September

Check out the September 2014 issue of Engineered Systems, with features on radiant panels, refrigerant flow systems, and much more!

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