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Circuits

Pumping and Flow Controls in Geothermal Heat Pump Systems

May 02, 2012
Stephen Hamstra P.E., ASHRAE HBDP LEED AP,
0 Comments
What are the key technical challenges and design options for optimizing a geothermal heat pump design? Review the pros and cons involved with centralized or distributed pumping, with hybrid or decoupled systems, and with the controls that can guide them.
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Switch

Chiller Startup & Shutdown: Worth Doing Right

May 02, 2012
Rick Nadeau, P.E.
0 Comments
Commissioning, tracking performance data, and paying attention to detail during startup and shutdown can raise performance while lowering expenses.
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graphic

Thoughtful Simplification In The Data Center

March 23, 2012
Kevin Dickens, P.E.
0 Comments
New ideas, regulations, and equipment are making some designs outdated faster than ever. How to take in an ever-evolving landscape, take a deep breath, and provide a data center design to stay proud of? Learn about an integrated VAV approach, the only control point that really matters, and more.
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Cleanroom

Cleanroom Variable Airflow Design

March 23, 2012
Vincent A. Sakraida, P.E.
0 Comments
Appropriately enough, a good variable airflow design accommodates and refines a number of design variables. Particle monitoring strategies, minimum supply air calculation, HVAC sequencing, and space pressurization are just a few stops on the way to spotless performance.
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fans

Centrifugal Fans Installation Guide

March 23, 2012
Khalil Kairouz and Dale Price
0 Comments
Here’s a good reference for facilities, TAB pros, or even commissioning agents on what should be found on site (and how to achieve it in the first place). For install through setup, properly managing connections, bearings, controllers, and vibration risks will create an air of success.
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Graph

Take Control Of Your System With Differential Pressure Control

March 02, 2012
Bjarne Andreasen
0 Comments
Effective hydronics, like many things in life, is about maintaining balance. Learn more about achieving the three key conditions necessary for giving your modern controller a fighting chance to do its job.
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EE Global feature

Energy Efficiency Leaders Convening for EE Global in Orlando March 27 – 29

March 02, 2012
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The event will be co-hosted by the Alliance to Save Energy and its affiliated Southeast Energy Efficiency Alliance.


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gold chest

Innovation in Renovation: A Hunt for Gold

February 28, 2012
Zuhair Hasan P.E., LEED
2 Comments
What does a full-scale modernization on a 90-yr-old federal building and courthouse look like when it aims for federal energy goals and LEED status? Chiller plant and hot water/boiler overhauls are just the start. Aggressive lighting and water treatment/conservation strategies also contribute to the GSA’s effort to throw the book at this Alabama retrofit.
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blueprints

Doing Your Homework To Avert A Catastrophe

February 28, 2012
Robert Long
0 Comments
A learning environment adds extra meaning to the risks of “run to fail” mode, which can have the same effect on the budget as it does on the equipment. Covering everything from specification to installation and operation, schools need a permanent plan on hand for the moment when temporary HVAC becomes necessary.
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deionized water

Modular Mechanical Seals Protect HVAC Piping & Duct Systems

February 01, 2012
James E. Delahoyde
0 Comments
How can you really, really seal any gap between your pipe and the rest of the wall that just had a hole put in it to accommodate the pipe’s path? That’s a question we haven’t asked in these pages before. Learn about the available technology, bolt/nut combinations, and more to maintain a safe long-term relationship between these elements of your building systems and your building.
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Engineered SystemsON-DEMAND: We will be discussing a new, innovative system, which is more reliable and efficient than current AHU systems. Heating, cooling and heat recovery are integrated into a common circuit. The result is a shorter and more compact ventilation unit, with less pressure loss.

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