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Home » Topics » Engineered Systems NEWS » HVAC Engineering Technology

HVAC Engineering Technology
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The Butterfly Effect: Common Steam System Mistakes

The Butterfly Effect: Common Steam Boiler System Mistakes

From a missing pipe hanger three floors down to steam traps past their prime, these boiler replacement tales show that real system problems can originate inside the boiler room or far beyond it.
Ray Wohlfarth
Ray Wohlfarth
February 10, 2017

Famous mathematician Edward Lorenz coined the phrase “The Butterfly Effect,” which is the belief that some small occurrence could create devastating results in another location far away.


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Where To Place Air-Cooled Chillers

Where To Place Air-Cooled Chillers

Warm discharge plumes sweeping back into air-cooled condensers is nobody’s idea of an ideal performance environment. This CFD study shows how wind speed, wind direction, spacing between chillers, and separation from adjacent buildings all factor into the conversation about the best defense against unwanted hot air.
Kishor Khankari, Ph.D.
February 8, 2017

Ambient air is the primary heat rejection medium for the condenser coils of air-cooled chillers and dry coolers.


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A New Spin On VRF & Ventilation

A New Spin On VRF & Ventilation

A Tennessee district faced an old school HVAC challenge: aging ventilators and space constraints. So this team tried a new-school variation on common VRF retrofits to deliver improved efficiency and critical IAQ: they decentralized the outdoor air, combining enthalpy wheel and VRF components within a single classroom enclosure.
John Parris Frantz
February 8, 2017

Engineers retrofitting non-air conditioned schools to variable refrigerant flow (VRF) the last few years have relied on centralized packaged DOAS to comply with ASHRAE 62.1 outdoor air standards.


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Commissioning

Commissioning Mini-Split Systems

Rebecca T. Ellis, P.E.
February 3, 2017

In many buildings, there are isolated spaces with a continuous cooling load even when the buildings are unoccupied.


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Editors Note

Boiler Efficiency: Caught In The Crossfire

A revised standard tries to sneak in under the gun but gets told to freeze instead.
Robert Beverly
February 1, 2017

At the very, very end of 2016, the Department of Energy issued “final rules” for a few types of equipment/appliances.


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Case In Point
Case in point

Country club guest house receives energy upgrade with new boilers

January 14, 2017

Providing guests with an enjoyable and comfortable stay is of utmost importance to staff at the Saucon Valley Country Club in Bethlehem, PA. Using Weil-McLain® boilers to upgrade the heating system at the club’s Weyhill Guest House helped ensure that guests experienced a “home away from home.”


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Case In Point
Case in point

Zoning system helps Florida tourism company explore diverse cooling loads

January 13, 2017

Wild Florida Airboat Tours is a family-owned company that provides airboat tours through Lake Cypress, located in the Kissimmee River Basin.


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Case In Point
Case in point

Naval Postgraduate School creates microgrid with ice bank storage

January 12, 2017

As the nation’s largest consumer of energy, the Department of Defense (DoD) has created a goal to explore different ways of optimizing renewable energy resources based on end-use application.


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Fluid Cooling In Data Centers — If Now Now, When?

Fluid Cooling In Data Centers — If Not Now, When?

Trends don’t always follow the expected path (or timeline), but the basics remain the basics and increased cabinet density remains inevitable. Let’s revisit the progress of liquid in data center strategy and the tenets of a future-proof(ish) hybrid design for today.
Kevin Dickens, P.E.
January 10, 2017

Ten years ago in this very publication, I did something I never do. I went out on a limb and made a prediction.


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Case In Point
Case in Point

Benchmarking, resequenced chiller controls serve up success for Atlanta data center

January 10, 2017

As one of the largest commercial real estate firms in the southeastern United States, Childress Klein oversees and services nearly 40 million sq ft of office, industrial, retail and residential properties.


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