Monthly Archives: June 2017

High-rise fire in London: needless catastrophe

Around 1 am local time Wednesday morning, June 14, a kitchen fire began in a London high-rise public housing building. It was reported promptly to 999, London emergency services. The Grenfell Tower structure in west London–built mainly with precast concrete, steel and glass–should easily have resisted a kitchen fire long enough for the London Fire Brigade to arrive and extinguish it, but instead the fire spread.

Fire escaped through a window on a lower floor of the building, ignited newly installed, flammable materials on the exterior and quickly spread upwards. By the time the London Fire Brigade arrived, only a few minutes after the emergency call, the fire had already climbed well up the building of 24 floors, and it was also spreading sideways.

London high-rise fire, June 14, 2017, about 2 am

GrenfellTowerFireLondon20170614
Source: London emergency services

Desperate efforts: The London Fire Brigade was able to extinguish the kitchen fire, but its efforts against the massive fire on the outside of the high-rise building proved futile. By the time water flowed from aerial pumpers, the fire had spread onto two or more sides of Grenfell Tower and had reached the upper floors. As shown in photos, water streams rose only about halfway up one side of the building and a third of the way up a second. Apparently the London Fire Brigade could not access other sides when it mattered most.

The intense fire warped or melted new, thin aluminum window frames, and window panes fell out, allowing the fire inside. The building never had sprinklers. Contents of nearly all dwellings above the eighth floor and some below eventually ignited, further spreading fire from window to window. Interior fires became mostly air-limited and very smoky. Photos show interior fires burning at least 12 hours, until there were no more dwelling contents left to burn.

Inside Grenfell Tower, survivors say chaos reigned. In some areas, fire alarms did not sound or could not be heard. Emergency lighting was dim. Residents had been warned to stay inside dwellings in case of fire, but many ran through smoky corridors and down the single, narrow stairway, colliding with firefighters rushing upward. Most Grenfell Tower residents survived, but many who followed instructions became trapped.

While the lowest floors of Grenfell Tower suffered water damage, photos show at least three-quarters of the building incinerated. Five days after the fire began, London police stated that at least 79 people had perished. News reports speculated that final numbers could be much higher. Parts of the structure had been found unstable, so that dogs had been sent in to search for remains.

Causes of the catastrophe: The Grenfell Tower fire of 2017 did not compare to property damage from the Great London Fire of 1666, but the death toll may have been higher. The British prime minister has ordered a public inquiry directed by a judge. While that is likely to take at least months, contributing factors are already known.

It was clear from the outset that materials installed in a recent renovation of Grenfell Tower spread fire outside the building. High-rise structures were traditionally built with fireproof materials: typically concrete, steel, brick and glass. The renovation clad the building in a thick layer of insulation and a thin layer of rainshield. Both the added layers contained flammable materials, and both apparently burned.

Early news reports mentioned several different materials used in renovating Grenfell Tower, including highly flammable polystyrene and polyurethane. Discovery of specifications narrowed the list to Celotex RS5000 insulation, 6 inches thick, and Reynobond PE rainshield, 1/8 inch thick–both manufactured in Europe. The Celotex product is rigid polyisocyanurate foam, fire resistant but not fireproof. The Reynobond PE product has a solid polyethylene core, easily melted and readily flammable.

For a short time, Philip Hammond, the famously arrogant Chancellor of the Exchequer since July, 2016, muddied waters with a claim that Grenfell Tower renovation materials were banned under British building codes. If so, that might shift liability away from the UK government and toward renovation contractors. Writing in the New York Times, reporter David D. Kirkpatrick soon showed Hammond misinformed or lying.

In recent years, flammable materials have been allowed on the exteriors of high-rise buildings in several places, including France, Britain, Dubai, Singapore, South Korea and Victoria, Australia. That has resulted in a series of so-called “cladding fires” on the outsides of high-rise buildings. Until the Grenfell Tower catastrophe, the most widely publicized of those fires occurred in Dubai.

The worst of at least five recent high-rise cladding fires in Dubai heavily damaged the Address hotel on New Year’s Eve, 2015, the Sulafa tower on July 20, 2016, and the ironically named Torch Tower on April 2, 2017. The disasters resulted in several injuries but no deaths. In response, Dubai reportedly tightened building requirements, with some previously installed building materials needing to be replaced.

Avoiding another catastrophe: A cladding fire in Melbourne, Australia on November 25, 2014, showed how multiple fire-safety measures can avoid catastrophes. Lacrosse Docklands is a 23-story apartment building similar to Grenfell Tower. The exterior had been clad with similar flammable materials. A cigarette left in a plastic dish on a balcony ignited the dish and the wood table under it, starting a fire.

The burning wood table ignited an adjacent area of rainshield material, starting the cladding fire. The rainshield on this building was known by the trade name Alucobest. Like the Reynobond PE product, the standard Alucobest product has a readily flammable solid polyethylene core. As with the Grenfell Tower fire, the Lacrosse Docklands fire warped and melted aluminum window frames, and window panes fell out, allowing the fire to enter dwellings.

That is where similarities end and differences begin. Unlike Grenfell Tower, the insulation behind the rainshield at Lacrosse Docklands in Melbourne was non-combustible, not merely fire resistant: glass wool instead of polyisocyanurate foam. That probably slowed the speed of fire spreading, and it fed less fuel to the fire. The design of Lacrosse Docklands features bays of dwellings separated by protruding fins. The fire in Melbourne rose rapidly up one bay but did not jump to adjacent bays.

Unlike Grenfell Tower in London, Lacrosse Docklands in Melbourne had sprinklers–likely the most important difference. They worked as intended and kept fire from spreading inside dwellings, even though fire had been able to enter through damaged and open windows. The intensity of the fire did not increase through igniting dwelling contents, and fire did not spread inside the Melbourne building.

Unlike the London Fire Brigade performance, water flows from aerial pumpers in Melbourne reached to the top of the Lacrosse Docklands building and extinguished the cladding fire. There was substantial property damage in Melbourne, but there were no deaths or major injuries. Multiple safety measures combined to prevent a disaster from becoming a catastrophe.

– Craig Bolon, Brookline, MA, June 21, 2017


A visual guide to what happened at Grenfell Tower, BBC News, June 20, 2017

Danica Kirka and Frank Griffiths, Associated Press, 79 now believed to have died in London high-rise fire, ABC News, June 19, 2017

David D. Kirkpatrick, UK officials said cladding on tower burned in London was banned, but it wasn’t, New York Times, June 19, 2017

Justin Pritchrd, Associated Press, Insulating skin on high-rises has fueled fires before London, ABC News, June 18, 2017

Tom Peck, Grenfell Tower cladding is banned in UK, Philip Hammond says, London Independent, June 17, 2017

Danica Kirka, Associated Press, Anger erupts over possible flaws at burned London tower, WTOP (Washington, DC), June 16, 2017

Aaron Morby, Twenty London high-rises with Grenfell cladding system, Construction Enquirer (UK), June 16, 2017

Tom Bergin, Maker of panels at London tower cautioned on high-rise fire risk, Reuters (UK), June 16, 2017

Hayley Dixon, Sarah Knapton, Steven Swinford, Leon Watson and Danny Boyle, Grief gives way to anger as Grenfell Tower residents demand answers over string of failures, London Telegraph, June 15, 2017

Dan Bilefsky, London fire death toll rises to 17, New York Times, June 15, 2017

Hannah Lucinda Smith, The Grenfell Tower blaze was a disaster waiting to happen, The Spectator (UK), June 15, 2017

Benedict Brook and Rose Brennan, Melbourne skyscraper fire, caused by cladding, may have been a warning for London, News Corp Australia, June 15, 2017

Calla Wahlquist, Cladding in London high-rise fire also blamed for 2014 Melbourne blaze, Manchester Guardian (UK), June 15, 2017

Henry Bodkin, Fire safety expert had warned government advisors ‘entirely avoidable’ deaths would occur at structures like Grenfell Tower, London Telegraph, June 14, 2017

Jon Gambrell, Fire hits Dubai high-rise complex near world’s tallest tower, Associated Press, April 2, 2017

Unattributed, AFP, Dubai toughens fire rules after tower blazes, Business Times, January 22, 2017

Unattributed, Dubai fire: blaze engulfs more than 30 floors of Sulafa Tower, BBC News, July 20, 2016

Lacrosse Docklands fire: post-incident analysis report, Metropolitan Fire and Emergency Services Board, Victoria, Australia, April 27, 2015 (5 MB)

Andrew Moseman, Huge fire engulfs Dubai skyscraper full of apartments, Popular Mechanics, February 20, 2015

Renewables: inherit the wind

Some are furious at the cockroach President for blowing off the Paris climate treaty, but many expected that, since it had been one of the few stable goals of his lurching campaign. There is little the cockroach can actually do. Under the treaty’s terms, it remains in effect until at least the fall of 2020, and thus it is sure to become a strong factor in the next campaign. If the cockroach tries to run again, he looks likely to lose.

Some political corruption from pandering by the cockroach President will be thwarted by economics. In many places, coal power is no longer cost-competitive, and in some places wind power does not need new subsidies to thrive. The five leading wind-power states–Iowa, South Dakota, Kansas, Oklahoma and North Dakota–all voted for the cockroach, but they are not aligned with his hostile views on renewable energy. Many people in those states now earn their livings from it, while few there are sustained by the coal-power industry.

Growth of renewables: The growth of renewables in the U.S. energy supply is a trend decades long. It began with hydroelectric power heavily funded by the federal government during the 1930s. The next surge was wood-fired power from the late 1970s through the early 1980s. Despite later being labeled “carbon neutral,” that has fallen out of favor. Toxic emissions are difficult and costly to control. Outputs have been gradually dropping over the past 30 years.

Renewables in the U.S. energy supply

UsRenewableEnergy
Source: U.S. Energy Information Administration

There are now four major U.S. renewable energy sources: hydro, biofuel, wood and wind–in declining current amounts. As of 2016, each one contributed about 2.0 to 2.5 quadrillion Btu per year. Sources still gaining are biofuel–taking off around 2002–and wind–climbing around 2007. Led by ethanol, biofuel is mostly used for transportation. The other renewable sources are mostly or entirely used to generate electricity.

Two other substantial renewable sources are solar power and waste burning, both around 0.5 quadrillion Btu per year. Solar began to climb around 2013 and is still in early stages of growth. Waste burning has seen little growth since the 1980s. It spreads toxic pollutants–worse than wood. Renewable sources now provide over a tenth of U.S. total energy use: for 2016 about 10.2 out of 97.4 quadrillion Btu.

Although prevailing customs do not count nuclear power among the renewables, it emits hardly any greenhouse gases. For 2016, the U.S. reported 8.4 quadrillion Btu. It is in decline, with older plants closing and new plants rarely opening. When combined with renewable sources, the United States is now getting about 19 percent of total energy consumption from sources that emit little or no greenhouse gases.

Sustainable progress: The dominant influences on renewable energy are now state regulations and local initiatives, not federal programs. They will provide sustainable progress despite the cockroach President, although federal programs could improve outcomes. The most important among the state regulations are renewable energy portfolios for electricity, now enforced in 29 states and the District of Columbia.

Renewable energy portfolios by states

RenewablePortfolioStates
Source: U.S. Energy Information Administration

Laggard states are in the Deep South and the Mountain West, plus the coal-mining states Kentucky and West Virginia. Standards vary widely. Those in Hawaii and Connecticut are among the most demanding, requiring 30 and 27 percent renewable energy in 2020. Stronger states limit qualifying sources to new wind, solar and geothermal plants. Other states accept hydropower, nuclear power and waste burning. Pennsylvania accepts burning so-called “waste coal.” Ohio accepts burning so-called “clean coal.”

Governors of several states recently announced they had formed a new organization called U.S. Climate Alliance, intended to promote and organize renewable energy standards. The Regional Greenhouse Gas Initiative–organized in 2003 by New England states, New York, New Jersey and Delaware, and more recently joined by Maryland and Virginia–has provided a durable model for effective state coordination.

Worldwide energy use trends

WorldEnergySources
Source: U.S. Energy Information Administration

Despite struggles, the United States continues to maintain a strong record in energy sourcing. As compared with 19 percent of U.S. total energy from sources that emit little or no greenhouse gases, for 1990 through 2012–the latest comprehensive data–worldwide performance remained stuck at 15 to 16 percent. Progress with renewables has been swamped by growth in coal burning by countries of southeast Asia, led by China.

– Craig Bolon, Brookline, MA, June 3, 2017


Matt Viser, Kerry says Trump’s decision was ‘a day of craven ignorance’, Boston Globe, June 2, 2017

Jeremy Bloom, Trump will pull U.S. out of Paris Agreement–in 4 years, Clean Technica (Honolulu, HI), June 2, 2017

David Abel, Massachusetts joins other states to fulfill U.S. pledges on carbon, Boston Globe, June 2, 2017

John Flesher, Associated Press, States and cities pledge action on climate without Trump, WTOP (Washington, DC), June 1, 2017

Valerie Volcovici and Jeff Mason, Trump says U.S. to withdraw from Paris climate accord, Reuters (UK), June 1, 2017

Associated Press (Berlin), As Europe talks tough on climate, data show emissions rose, WTOP (Washington, DC), June 1, 2017

Emma Gilchrist, Trump won’t stop the renewable energy revolution, Clean Technica (Honolulu, HI), March 31, 2017

Monthly Energy Review, U.S. Energy Information Administration, May, 2017 (20 MB)

State renewable portfolio standards and goals, National Conference of State Legislatures, 2017

Program Design, Regional Greenhouse Gas Initiative, 2017

David Abel, Suit faults Massachusetts record in cutting emissions, Boston Globe, January 3, 2016

International energy outlook, U.S. Energy Information Administration, 2016

Renewable portfolio standards, U.S. National Renewable Energy Laboratory, 2015

Matthew L. Wald, Power plants try burning wood with coal to cut carbon emissions, November 3, 2013

Craig Bolon, Surfing a vortex: energy and climate, Brookline Beacon, February 12, 2017

Craig Bolon, Third-generation nuclear power: uncertain progress, Brookline Beacon, September 6, 2016

Craig Bolon, New gas pipelines spurned: no subsidies from electricity rates, Brookline Beacon, August 17, 2016

Craig Bolon, Greenhouse gases: passing the buck, Brookline Beacon, January 11, 2016

Craig Bolon, Losing steam: U.S. nuclear power-plants, Brookline Beacon, September 19, 2015

Craig Bolon, Renewable energy: New England experience, Brookline Beacon, August 15, 2015

Craig Bolon, U.S. energy for 2014: a year of gradual progress, Brookline Beacon, March 10, 2015

Craig Bolon, New England energy: wobbly progress, Brookline Beacon, January 12, 2015

Craig Bolon, Some “green energy” reminds us of leprechauns, Brookline Beacon, April 8, 2014