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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: Water Conservation

Water


Methods of Calculating Water Recovery From Air-Conditioning Cooling Coils, Part 2 of 2

HPAC Engineering, May 2015, by William G. Acker.
http://hpac.com/air-conditioning/methods-calculating-water-recovery-air-conditioning-cooling-coils-part-2-2

"Last month, in Part 1 of this article, we evaluated four equations used to determine the amount of water vapor removed from cooling coils in condensate-recovery applications. The accuracy of those equations varies, as some calculate only the removal of water vapor entering with the outside-air intake. This month, we will discuss more-accurate methods of calculating water-vapor removal and calculating the removal of all water-vapor loads by a cooling coil."

Methods of Calculating Water Recovery From Air-Conditioning Cooling Coils, Part 1 of 2

HPAC Engineering, Apr. 2015, by William G. Acker.
http://hpac.com/air-conditioning/methods-calculating-water-recovery-air-conditioning-cooling-coils-part-1-2

"In traditional building cooling, air passes through chilled cooling coils in air-handling units prior to entering a facility. As air passes over the coils, moisture in the air condenses into water on the coils. The water drips into a collection pan below and is sent to a sewer drain. Today, however, particularly in areas where water is scarce and rates are high, many building owners are collecting this water and using it to replenish cooling towers for irrigation and other uses."

Energy Trust [OR] Lends a Hand with Irrigation Efficiency

Capital Press, Feb. 9, 2015, by Lacey Jarrell.
http://www.capitalpress.com/SpecialSections/Water/20150209/energy-trust-lends-a-hand-with-irrigation-efficiency

"More consistent water application [using variable frequency drives] can mean greater water and power savings for large- or small-scale farmers."

Watts in a Drop of Water: Savings at the Water-Energy Nexus

ACEEE White Paper, Nov. 5, 2014, by Rachel Young. [Free registration required to view full-text.]
http://aceee.org/white-paper/watts-in-drop-water

"This paper shows a range of energy intensities for water and wastewater services and in residential hot and cold water. We draw from existing data to develop national estimates of energy savings associated with water savings, including energy used in water conveyance, water heating, and water and sewage treatment."

Improving Energy Efficiency in Hospitals and Health Care Facilities

Business Energy, Sept./Oct. 2014, by William Atkinson.
http://www.distributedenergy.com/DE/Articles/Improving_Energy_Efficiency_in_Hospitals_
and_Healt_27101.aspx


"Usually HVAC systems and lighting are the first places most people think to start when it comes to improving energy efficiency in hospitals and health care facilities. These are, indeed, critical elements of the journey; however, one might argue that the first place one should actually start is with the building envelope, because it’s where energy savings opportunities really begin and then carry through its affiliated processes."

Evaluating Air Compressor Cooling Systems

Compressed Air Best Practices, Aug. 2014, by Nitin G. Shanbhag.
http://www.airbestpractices.com/sustainability-projects/cooling-systems/evaluating-air-compressor-cooling-systems

"As the population continues to grow in the United States, industrial water use will need to continue to fall to help offset the increases in public-supply water use. Water-cooled compressed air systems provide an opportunity for sustainability managers to reduce associated cooling water consumption and costs. If switching to air-cooled air compressors is not possible, understanding the costs and the alternative types of liquid cooling systems is important."

Efficient Building Water Use

Consulting-Specifying Engineer, July 2014, by Willa Kuh and Fred Betz.
http://www.csemag.com/single-article/efficient-building-water-use/5c43e78511f4c18036dd0e018167ce82.html

"The escalating cost of providing potable water in the United States is creating new urgency for owners of commercial, industrial, and institutional buildings to respond with greater engineered water efficiency."

Banking Water for Power

Public Power, Jul/Aug 2014, by Alice Clamp.
http://www.publicpower.org/Media/magazine/ArticleDetail.cfm?ItemNumber=41566

"Public utilities often provide water service to their customers as well as electrical service. And many of them have noteworthy water conservation programs to manage cyclical variations in supply. Utilities are also banking and recycling water used in power plants to realize greater operational efficiencies."

Greening the Strip [Las Vegas]

EcoBuilding Pulse, Apr. 30, 2014, by Hallie Busti & Annie Milewski.
http://www.ecobuildingpulse.com/technology/vegas-properties-cash-in-on-sustainable-design_o.aspx

"The sea of resorts, shopping centers, and convention halls located just outside Las Vegas’ city limits may be notorious for its excess, but some of The Strip’s biggest developers are now looking for ways to reduce their environmental impact. The result is infusing a new kind of green—from LED lamps to geothermal heat pumps—into a region with limited natural resources."

Advanced Cooling and Water Treatment Technology Concepts for Power Plants

Power Magazine, Apr. 2014, by Sean Bushart and Jessica Shi.
http://www.powermag.com/advanced-cooling-and-water-treatment-technology-concepts-for-power-plants/

"Worldwide awareness of the need to minimize freshwater use for power generation—while minimizing energy penalties—is growing. The Electric Power Research Institute [EPRI] is involved in several programs that are developing innovative technologies."
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