Thursday, June 04, 2020
Hawai'i Free Press

Current Articles | Archives

Saturday, February 29, 2020
Hawaii Wind and Solar -- Dirty Secret Boosts Warming
By Selected News Articles @ 3:39 AM :: 1357 Views :: Energy, Environment

Climate change: Electrical industry's 'dirty secret' boosts warming

by Matt McGrath, Environment Correspondent, BBC, September 13, 2019

 … It's the most powerful greenhouse gas known to humanity, and emissions have risen rapidly in recent years, the BBC has learned.

Sulphur hexafluoride, or SF6, is widely used in the electrical industry to prevent short circuits and accidents.

But leaks of the little-known gas in the UK and the rest of the EU in 2017 were the equivalent of putting an extra 1.3 million cars on the road.

Levels are rising as an unintended consequence of the green energy boom.

Cheap and non-flammable, SF6 is a colourless, odourless, synthetic gas. It makes a hugely effective insulating material for medium and high-voltage electrical installations.

It is widely used across the industry, from large power stations to wind turbines to electrical sub-stations in towns and cities. It prevents electrical accidents and fires.

However, the significant downside to using the gas is that it has the highest global warming potential of any known substance. It is 23,500 times more warming than carbon dioxide (CO2).

Just one kilogram of SF6 warms the Earth to the same extent as 24 people flying London to New York return.

It also persists in the atmosphere for a long time, warming the Earth for at least 1,000 years.

So why are we using more of this powerful warming gas?

The way we make electricity around the world is changing rapidly.

Where once large coal-fired power stations brought energy to millions, the drive to combat climate change means they are now being replaced by mixed sources of power including wind, solar and gas.

This has resulted in many more connections to the electricity grid, and a rise in the number of electrical switches and circuit breakers that are needed to prevent serious accidents.

Collectively, these safety devices are called switchgear. The vast majority use SF6 gas to quench arcs and stop short circuits.

"As renewable projects are getting bigger and bigger, we have had to use it within wind turbines specifically," said Costa Pirgousis, an engineer with Scottish Power Renewables on its new East Anglia wind farm, which doesn't use SF6 in turbines.

"As we are putting in more and more turbines, we need more and more switchgear and, as a result, more SF6 is being introduced into big turbines off shore.

"It's been proven for years and we know how it works, and as a result it is very reliable and very low maintenance for us offshore."

How do we know that SF6 is increasing?

Across the entire UK network of power lines and substations, there are around one million kilograms of SF6 installed.

A study from the University of Cardiff found that across all transmission and distribution networks, the amount used was increasing by 30-40 tonnes per year.

This rise was also reflected across Europe with total emissions from the 28 member states in 2017 equivalent to 6.73 million tonnes of CO2. That's the same as the emissions from 1.3 million extra cars on the road for a year.….

Electrical company Eaton, which manufactures switchgear without SF6, says its research indicates that for the full life-cycle of the product, leaks could be as high as 15% - much higher than many other estimates.

Louis Shaffer, electrical business manager at Eaton, said: "The newer gear has very low leak rates but the key question is do you have newer gear?

"We looked at all equipment and looked at the average of all those leak rates, and we didn't see people taking into account the filling of the gas. Plus, we looked at how you recycle it and return it and also included the catastrophic leaks."….

read … The BBC

  *   *   *   *   *

One example of how SF6 is being used in Hawaii to protect circuit breakers from the erratic electricity produced by wind and solar: 

“Maui Electric has already added dual differential protection to a majority of the 69kV lines and replaced a majority of the 69kV breakers with 3 cycle SF6 breakers in an effort to reduce fault clearing times. The final two 69kV transmission lines are due to have the protection upgraded in 2017 and the final 69kV circuit breakers will be replaced in 2018. Maui Electric also has plans for upgrades to all of the 23kV line protection, 69kV bus protection, and transformer protection over the next decade.” 

“In 2014, the average cost for breaker replacements was almost $135,000. [] The failure data assembled during the evaluation indicates that the SF6 breakers are failing in a manner and timeframe that is different than would be expected for oil breakers. This SF6 failure data was not available when the strategy was initially developed in 2014. The strategy scenario analysis was performed with consortium failure data which is based primarily on oil breakers. Since the failure data is different and because all the oil breakers are being replaced with SF6 breakers, the strategy should be revised based on the failure modes and failure probabilities for SF6 breakers as well as the oil breakers.” (pg 48-49)

UHERO: “The 2007 Intergovernmental Panel on Climate Change Assessment Report indicates that: the methane (CH4) Global Warming Potential (GWP) is 25, the nitrous oxide (N2O) GWP is 298, the HFC-23 (hydro-fluorocarbon) GWP is 14,800, the HFC-134a GWP is 1,430, and the sulfur hexafluoride (SF6) GWP is 22,800.”  (GWP of CO2 is ‘1’)

How much SF6 has been put in place by HECO to satisfy the needs of windfarms and solar in Hawaii?  Google: SF6 HECO Hawaii

Links

TEXT "follow HawaiiFreePress" to 40404

Register to Vote

2aHawaii

808 Silent Majority

808 State Update AM940

ABCDEFG Blog

ACA Signups Hawaii

ACCE

ALEC

Alliance Defending Freedom

Aloha Life Advocates

Aloha Pregnancy Care Center

American Council of Trustees and Alumni

American Mothers of Hawaii

AMVETS-Hawaii

AntiPlanner

Antonio Gramsci Reading List

A Place for Women in Waipio

Astronomy Hawaii

Audit The Rail

Ballotpedia Hawaii

Better Hawaii 

Blaisdell Memorial Project

Broken Trust 

Build More Hawaiian Homes Working Group

CAFR Hawaii

Castaway Conservative

Children's Alliance Hawaii

Children's Rights Institute

ChinaTownWatch.com

Christian Homeschoolers of Hawaii

Citizens for Recall

Cliff Slater's Second Opinion

Coffee Break

CSIS Pacific Forum

DAR Hawaii

DeedySupport.com

DVids Hawaii

E Hana Kakou Kelii Akina

E Māua Ola i Moku o Keawe

Farmers For Choice Hawaii

FIRE

Fix Oahu!

Follow the Money Hawaii

Frank in Hawaii

Front Page Magazine

Frontline: The Fixers

Genetic Literacy Project

Get Off Your Butts!

God, Freedom, America

Grassroot Institute

Habele.org

Hawaii Aganst Assisted Suicide

Hawaii Aquarium Fish Report

Hawaii Aviation Preservation Society

Hawaii Catholic TV

Hawaii Christian Coalition

Hawaii Cigar Association

Hawaii Coalition Against Legalized Gambling

Hawaii ConCon Info

Hawaii Credit Union Watch

Hawaii Crime Victims' Rights

Hawaii Crop Improvement Association

Hawaii Debt Clock

Hawaii Defending Marriage

Hawaii Defense Foundation

Hawaii Families for Educational Choice

Hawaii Family Advocates

Hawaii Family Forum

Hawaii Farmers and Ranchers United

Hawaii Farmer's Daughter

Hawaii Federalist Society

Hawaii Federation of Republican Women

Hawaii Firearm Community

Hawaii Fishermen's Alliance

Hawaii Future Project

Hawaii Gathering of Eagles

Hawaii History Blog

Hawaii Homeschool Association

Hawaii Jihadi Trial

Hawaii March for Life

Hawaii Meth Project

Hawaii's Partnership for Appropriate & Compassionate Care

Hawaii Public Charter School Network

Hawaii Rifle Association

Hawaii Right to Life -- Big Island

Hawaii Right to Life -- Oahu

Hawaii Shield Law Coalition

Hawaii Shippers Council

Hawaii Smokers Alliance

Hawaii State Data Lab

Hawaii Together

Heritage Foundation

HI Coalition Against Legalized Gambling

HIEC.Coop 

HiFiCo

Hiram Fong Papers

Homeschool Legal Defense Hawaii

Honolulu Homeless Crisis

Honolulu Navy League

Honolulu Traffic

Horns of Jericho Blog

House Minority Blog

House Republican Caucus YouTube

HPACC

Hump Day Report

I Vote Hawaii

If Hawaii News

Imua TMT

Inouye-Kwock, NYT 1992

Inside the Nature Conservancy

Inverse Condemnation

Investigative Project on Terrorism

Iowa Meets Maui

Jackson v Abercrombie

Jihad Watch

July 4 in Hawaii

Kahle v New Hope

Kakaako Cares

Kau TEA Party

Kauai Co GOP

Keep Hawaii's Heroes

KeyWiki

Land and Power in Hawaii

Legislative Committee Analysis Tool

Lessons in Firearm Education

Lingle Years

Malulani Foundation

Managed Care Matters -- Hawaii

Malama Pregnancy Center of Maui

Mauna Kea Recreational Users Group

MentalIllnessPolicy.org

Middle East Forum--The Legal Project

Mililani Conservatives for Change

Military Home Educators' Network Oahu

Missile Defense Advocacy

MIS Veterans Hawaii

Muslim Brotherhood in America

NAMI Hawaii

NARTH

Natatorium.org

National Christian Foundation Hawaii

National Parents Org Hawaii

National Wind Watch

New Zeal

NFIB Hawaii News

No GMO Means No Aloha

Northwest Economic Policy Seminar

Not Dead Yet, Hawaii

Now What I Really Think

NRA-ILA Hawaii

Oahu Alternative Transport

ObamaCare Abortion Hawaii

Obookiah

OHA Lies

Opt Out Today

OurFutureHawaii.com

Pacific Aviation Museum

Patients Rights Council Hawaii

PEACE Hawaii

People vs Machine

Pritchett Cartoons 

Pro-GMO Hawaii

P.U.E.O.

RailRipoff.com

Rental by Owner Awareness Assn

Republican Party -- Hawaii State

Research Institute for Hawaii USA

Rick Hamada Show

RJ Rummel

Robotics Organizing Committee

Save Dillingham Airfield

School Choice in Hawaii

SenatorFong.com

SIFE Remington

SIFE W. Oahu 

Sink the Jones Act

Smart About Marijuana--Hawaii

St Marianne Cope

State Budget Solutions Hawaii

State Policy Network

Statehood for Guam

Tax Foundation of Hawaii

The Harriet Tubman Agenda

The Long War Journal

The Real Hanabusa

Time Out Honolulu

Trustee Akina KWO Columns

Truth About Trade & Technology - Hawaii

UCC Truths

Union Members Know Your Rights

US Tax Foundation Hawaii Info

Valor in the Pacific

VAREP Honolulu

Waagey.org

West Maui Taxpayers Association

What Natalie Thinks

Whole Life Hawaii

Yes2TMT