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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: HVAC/R

HVAC/R


New-Old Refrigerant: Carbon Dioxide for Industrial Refrigeration

ASHRAE Journal, Aug. 2016, by Donald L. Fenton.
http://tinyurl.com/h4r23pt

"CO2 is one of the five natural refrigerants and over the past 20 years has gained popularity, particularly with low-temperature refrigeration for industrial systems."

Premium Power Drive Systems

Heating, Piping, Air Conditioning Engineering, Aug. 2016, by Rob Boteler.
http://hpac.com/motors-drives/premium-power-drive-systems

"Increasingly in industrial and commercial HVAC applications, electric motors are being combined with power converters to form premium power drive systems (PPDS). When used in variable-flow applications, PPDS can deliver savings unmatched by mechanical speed/flow-control systems."

Next Generation Standards: How the National Energy Efficiency Standards Program Can Continue to Drive Energy, Economic, and Environmental Benefits

ACEEE, Aug. 4, 2016, by Andrew deLaski, Joanna Mauer, et. al.
http://aceee.org/sites/default/files/publications/researchreports/a1604.pdf

"Appliance, equipment, and lighting standards have been among the most effective energy efficiency policies, delivering increased savings over multiple rounds of standards for many products. But how much more can be accomplished? What is the potential for additional savings from future standards, specifically for the presidential administration that begins in 2017? This report estimates the savings opportunities from updates to existing standards. We also offer five strategic recommendations for improving the national standards program and further increasing savings."

Integration: Electrical and HVAC Systems

Consulting-Specifying Engineer, July 2016, by Ryan E. Ishino and James A. Freeman.
http://www.csemag.com/single-article/integration-electrical-and-hvac-systems/b738225d21462b6a2e213785bd1ae460.html

"System integration of electrical and HVAC systems provides a smart building solution, where the systems are coordinated to allow opportunities to lower costs and achieve greater energy efficiencies."

Less Steam, Please: Thermal Power Reduction In Health Care

Engineered Systems, July 2016, by Carl C. Schultz.
http://www.esmagazine.com/articles/97816-less-steam-please-thermal-power-reduction-in-health-care

"It might seem like an odd objective, but the potential efficiency gains are real. And from heat recovery chillers to modified humidification targets so are the opportunities to replace steam production with hot water generation and to manage remaining steam needs more intelligently."

The Future of Air Conditioning for Buildings

U.S. Dept. of Energy, EERE, July 2016, by Navigant Consulting and Oak Ridge National Lab.
http://www.energy.gov/eere/buildings/downloads/future-air-conditioning-buildings-report

"This report characterizes the current landscape and trends in the global air conditioning (A/C) market, including discussion of both direct and indirect climate impacts, and potential global warming impacts from growing global A/C usage. The report also documents solutions that can help achieve international goals for energy efficiency and greenhouse gas (GHG) emissions reductions."

Reducing Energy Consumption with High-Temperature Heating and Ventilation

The Construction Specifier, May 2016, by Marc Braun.
http://www.constructionspecifier.com/reducing-energy-consumption-with-high-temperature-heating-and-ventilation/

"The Department of Energy published a study, “Field Demonstration of High-efficiency Gas Heaters,” where it discussed how high-temperature heating and ventilation (HTHV) direct gas-fired heaters dramatically reduce energy consumption when replacing unit heaters in warehouses and other high-bay buildings. These direct-fired technologies—often referred to as ‘make-up air heaters’—have been widely adopted as high-efficiency ventilation units. The surprising thing is specialized versions of these products can accomplish high-efficiency space-heating when ventilation is not required, such as during unoccupied times."

Pushing the Envelope: PNC Tower, World's Greenest High-Rise, Is A Study In Simplicity

Building Operating Management, Apr. 2016, by Ronald Kovach.
http://www.facilitiesnet.com/green/article/PNC-Tower-Worlds-Greenest-High-Rise-Is-A-Study-In-Simplicity--16527

"For all the complexity of its systems and building envelope, the structure that is being touted as the greenest high-rise in the world is also a study in simplicity. The Tower at PNC Plaza, which opened in October in Pittsburgh, is using that most primal of objects — the sun — to help create essential building systems, namely HVAC and lighting. And a gigantic solar-fired version of another fundamental — hot air rising up a chimney — is also a vital part of how the building works. At the same time, it is the sun that has created the structure’s biggest surprises."

Assessing the Radiant Roads to School Design

Engineered Systems, May 2016, by Chris Miller and Eddie Ortiz.
http://www.esmagazine.com/articles/97717-the-radiant-roads-to-school-design

"Leaning on experience and data from various K-12 cities and projects, the authors pursue some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll."

Replacing a Steam Boiler

Engineered Systems, Jun 2016, by Ray Wohlfarth.
http://www.esmagazine.com/articles/97773-replacing-a-steam-boiler

"When designing or replacing a low pressure steam boiler, throw out everything you know about hydronic boilers. A steam system is closer in operation to an air conditioning unit than it is to a hydronic boiler. If you design a steam system using hydronic design methods, it will not operate properly. A hydronic system uses sensible heat while a steam system uses both sensible and latent heat. Sensible heat can be measured with a thermometer while latent heat causes a change of state and cannot be measured accurately with a thermometer. The following are some of the steps I take when designing a replacement steam system."

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The Energy Newsbriefs Blog is a continuation of the weekly Energy Newsbriefs. Please bookmark this site and return frequently. Although we will not be accepting comments from within the Blog, we would be happy to hear from you by email at library@energy.wsu.edu