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Energy Newsbriefs Blog

This current awareness service is prepared by the WSU Energy Program Library with funding from the U.S. Department of Energy State Energy Program. This information is provided for energy professionals and interested members of the public to highlight recent energy-related news, articles, and reports that discuss energy efficiency, energy conservation, and renewable sources of energy in engineering and policy circles.

 

Category: Ventilation

Ventilation


Venting Vapor

Building Science Corporation, July 15, 2015, by Joe Lstiburek.
http://buildingscience.com/documents/insights/bsi-088-venting-vapor

"Sometimes the obvious is not so obvious. And sometimes the not so obvious becomes obvious. For example installing leaky ductwork in a vented attic is a pretty dumb idea. It leads to negative pressures and high air change that depending on the time of year and climate zone results in part load humidity problems, ice damming, excessive energy use, loss of comfort, whatever. If radon were valuable we would mine it this way. Where there is an attached garage we call it the Kevorkian option. Everyone pretty much gets it."

Natural Ventilation: Bringing Fresh Air Into Commercial Buildings

The Construction Specifier, June 2015, by Michael P. Toohey.
http://www.constructionspecifier.com/natural-ventilation-bringing-fresh-air-into-commercial-buildings/

"This article discusses the history of ventilation, describes its principles, and compares it with mechanical ventilation. The issues examined consider when specifying a separate window and actuator compared to an integrated natural ventilation system; it also addresses the options available for natural ventilation."

DOAS Gaining Traction in US [Dedicated Outdoor Air Systems]

Air conditioning, Heating & Refrigeration News, June 15, 2015, by Jen Anesi.
http://www.achrnews.com/articles/129852-doas-gaining-traction-in-us

"Commercial building codes are mandating higher volumes of fresh-air intake than ever before. To help meet these ventilation requirements, more and more HVAC contractors and building owners are turning to dedicated outdoor air systems (DOAS). These systems most often run in parallel with other systems to deliver 100 percent outdoor air and handle latent loads. The units improve occupant health and comfort, and they are quickly gaining popularity in the U.S."

Fan-Efficiency Metrics

HPAC Engineering, May 2015, by Dustin Meredith and Jeanne Harshaw.
http://hpac.com/iaq-ventilation/fan-efficiency-metrics

"Air Movement and Control Association (AMCA) International estimates fans account for 30 to 40 percent of commercial-building HVAC energy consumption. Improving fan efficiency, therefore, is an important step toward reducing global, overall energy use."

New Poultry Barn Ventilation System

Manure Manager, Jan./Feb. 2015, by Lilian Schaer
http://www.mydigitalpublication.com/publication/index.php?i=&m=1559&l=1&p=22&pre=&ver=swf

"An innovative minimum ventilation system for poultry barns is improving bird health and reducing energy costs for farmers in the process."

Energy Impacts of Laboratory Ventilation Methods

Heating/Piping/Air Conditioning Engineering, Feb. 2015, by Victoria Herman and others.
http://hpac.com/iaq-ventilation/energy-impacts-laboratory-ventilation-methods?page=1

"Laboratory ventilation method—fixed percentage offset or fixed flow per door—has little effect on overall energy consumption compared with other design variables."

Demand-Controlled Ventilation

Engineered Systems, Jan. 2015, by Paul Ehrlich.
http://www.esmagazine.com/articles/96931-demand-controlled-ventilation

"The right design strategy can lead to safe, more efficient environments."

[ASHRAE] 90.1 and Designing High Performance Commercial Kitchen Ventilation Systems

ASHRAE Journal, Nov. 2014, by Don Fisher.
http://bookstore.ashrae.biz/journal/download.php?file=2014Nov_012-025_Fisher.pdf

"...regardless of the limits to energy efficiency, ASHRAE through its technical committees and industry support has moved the North American CKV design world from the dark ages to the front-of-the-pack. Furthermore, the inclusion of commercial kitchen ventilation within Standard 90.1 has caught the attention of the HVAC design community. We believe that the CKV system design has taken a positive step forward as a result of the Standard 90.1 initiative. Provided the designer understands the implications, limits and subtleties of the best practice options, one can cost-effectively increase the energy efficiency of CKV systems in concert with improving thermal comfort in the kitchen."

Choosing a Whole-House Ventilation Strategy (Pt. 2)

Journal of Light Construction, Oct. 2014, by Allison Bailes.
http://www.jlconline.com/ventilation/choosing-a-whole-house-ventilation-strategy_o.aspx

"An update on current standards and how to meet them."

Variable Volume DOAS Fan-Powered Terminal Unit

ASHRAE Journal, Aug. 2014, by Dan Int-Hout. [Choose Download or Save.]
http://bookstore.ashrae.biz/journal/download.php?file=2014Aug_070-073_HVACapps_Int-Hout.pdf

"Today’s design engineers face a series of complex decisions in an effort to reduce energy consumption and maintain comfort, all while meeting a variety of codes and standards. One option that seems to satisfy all these requirements is a DOAS [dedicated outdoor air system] fan-powered terminal unit. Its combination of a variable speed ECM fan, large sensible cooling coil, and small DOAS primary air valve allows for the widest possible range of operational strategies that both minimize energy and maximize ventilation control."

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