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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: Geothermal

Geothermal


Heat from Beneath the Ground – Working to Advance Deep Direct-Use Geothermal

U.S. Dept. of Energy, EERE, Nov. 15, 2016, by Timothy Patrick Reinhardt.
http://energy.gov/eere/articles/heat-beneath-ground-working-advance-deep-direct-use-geothermal

"Beneath our feet lies a source of geothermal heat that can be tapped to provide heating and cooling to both residential and commercial buildings, manufacturing processes, greenhouses and aquaculture ponds. Deep direct-use (DDU) systems are an emerging technology area in the geothermal sector that draw on lower temperature geothermal resources. Deeper than geothermal heat pumps and other conventional direct-use systems, DDU is deployable at a similar temperature range—between 100°F and 300°F—but at a much larger scale. DDU maximizes system efficiencies and return on investment."

New Report: Geothermal Power Market Showing Strong Growth

International District Energy Association, Oct. 14, 2016.
http://www.districtenergy.org/blog/2016/10/14/new-report-geothermal-power-market-showing-strong-growth/

"A new report by the US Geothermal Energy Association (GEA) projects sustained strong growth for geothermal power through 2016. The “2016 Annual U.S. & Global Geothermal Power Production Report” forecasts that projects now under development when completed would increase capacity outside the U.S. by 25%."

Lunching and Learning: Food for Thought on a Geothermal-Heat-Pump-System Design

Heating, Piping, Air Conditioning, Jun 2016, by Jeffrey Newcomb.
http://hpac.com/heating/lunching-and-learning-food-thought-geothermal-heat-pump-system-design

"In the article, Fred, a mechanical engineer, explains his unusual design for a campus chilled-water system to William, a civil engineer. William asks questions and makes observations, system diagrams scribbled on napkins are exchanged, and Fred is left with a new way of thinking about his design. Sound familiar?"

New Plant Design Options Expand Geothermal Power Operations

Power Magazine, Apr. 2016, by Allie Nelson.
http://www.powermag.com/new-plant-design-options-expand-geothermal-power-operations/

"Geothermal energy may not be a large contributor to the U.S. power mix—it provided less than 0.5% of total U.S. generation in 2015—but it is a reliable and dispatchable renewable energy source that plays well with others. And while the concept is old, new technology is making it easier for grid operators to utilize this important resource."

Organic Rankine Cycle Systems - The Latest Innovative Approach to Geothermal Energy

North American Clean Energy, Sep./Oct. 2015, by Anthony Hinde.
http://www.nacleanenergy.com/articles/21321/organic-rankine-cycle-systems-the-latest-innovative-approach-to-geothermal-energy

"With the worldwide hunt for new sources of green energy, it becomes practical to create electrical energy from geothermal sources at much lower temperatures than previously envisaged. Today, Independent power producers (IPP’s) in the USA, Turkey, Latin America, and Southeast Asia are developing thousands of MW from resources at maximum 200°C (392°F) bottom hole temperature. The main technology used for the exploitation of these lower temperature geothermal sources is the Organic Rankine Cycle (ORC), a binary cycle with organic fluid. The ORC system has proven to be the best power generating solution when the enthalpy level of the heat source is low."

Pond Loop for Ice Refrigeration

ASHRAE Journal, Sep 2015, by Jason Larosh.
http://bookstore.ashrae.biz/journal/download.php?file=2015Sept_082-089_TechAward_LaRosh.pdf

2015 ASHRAE Technology Award Case Studies:
"The pond loop geothermal refrigeration system at the Janesville Ice Arena uses an adjacent pond as thermal storage to pull heat from and reject heat to the ice sheet refrigeration system. Other improvements to the arena include a new ice sheet and hot water heating system."

3 Options for HVAC Energy Savings

Building Operating Management, June 2015, by James Piper.
http://www.facilitiesnet.com/hvac/article/3-Options-for-Energy-Savings-in-HVAC-Systems-Facilities-Management-HVAC-Feature--15949

"Even with today’s falling energy prices, facility managers are looking for ways to reduce the energy use of HVAC systems. New technologies and improvements in existing technologies are giving facility managers options. While advances can be seen in practically all HVAC systems, some of the most significant advances are coming in three particular areas: variable refrigerant flow systems, rooftop units, and geothermal systems."

USGS: Happy Earth Day 2015

U.S. Geological Survey Science Features, Apr. 20, 2015, by Jessica Robertson and others.
http://www.usgs.gov/blogs/features/usgs_top_story/happy-earth-day-2015/

"The USGS is joining people across the world to celebrate Earth Day on April 22, 2015. To help build environmental awareness, the USGS has outlined some of the critical issues facing our planet as well as science projects underway to address these challenges. Starting with science provides a valuable foundation for managers, policymakers, and other decision makers to make the most informed decisions to protect our changing world."

Mining for Lithium in Geothermal Brine: Promising but Pricey

Power Magazine, Mar. 2015, by Gail Reitenbach.
http://www.powermag.com/mining-for-lithium-in-geothermal-brine-promising-but-pricey/?printmode=1

"Brine, the waste stream of the geothermal power production cycle, is usually considered a nuisance. High in corrosive minerals, even when reinjected, it’s challenging to manage. So when Simbol Inc. showed it had a way to turn this waste stream into a revenue stream by mining it for high-value minerals like lithium, a lot of people got excited. However, just as this article was going to press, a lot of people got laid off."

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