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Home » Topics » HVAC Engineering Technology » Cooling & Chillers

Cooling & Chillers
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Case In Point
Case in Point

Chemical company yields positive reaction with VRF retrofit

February 11, 2017

Cleveland-based Euclid Chemical has been supplying the construction industry with products to improve the strength, appearance, and usability of concrete since 1910.


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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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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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A Physical View IAQ

Biofilms In HVAC And Around Your Teeth

While some bacteria are beneficial, others are dangerous and can thrive in certain indoor environments.
Stephanie Taylor, M.D., M. Arch, CIC
December 7, 2016

As engineers work to reduce the risk of Legionella growth in buildings, what strategies can be borrowed from treating illnesses caused by biofilms?  


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Case In Point
Case In Point

Air curtains help restaurant bring the great outdoors inside

December 4, 2016

Thanks to a recent remodeling, patrons seated indoors experience the ambience of dining outdoors at O’Toole’s Irish American Grill & Bar. However, there are no mosquitoes, flies, or vehicle emission odors, and the temperature is always a comfortable 74°F.


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