29/08/2017

Musta hiili & Climate and Clean Air Coalition

Nyt presidentitkin alkaneet puhumaan mustasta hiilesta (black garbon). Hiili onkin mustaa (sic). Näyttää siltä, että tavanomaiset ilmaukset kuten noki (soot) eivät kelpaa. Musta hiili ei ollut mukana Kioton sopimuksessa, mutta se nousi viisi vuotta sitten isompaan keskusteluun seuraavasti:

Pollutants that are short-lived in the atmosphere such as methane, black carbon and hydrofluorocarbons (HFCs) together account for approximately one-third of current global warming, have significant impacts on public health, the environment, and world food productivity. Secretary of State Hillary RODHAM CLINTON 16 Feb 2012 announced the Climate and Clean Air Coalition (CCAC) to reduce short-lived climate pollutants, a new global initiative to seize the opportunity of realizing concrete benefits on climate, health, food and energy resulting from reducing short-lived climate pollutants. The coalition will focus efforts on reducing black carbon (soot), hydrofluorocarbons (HFCs), and methane. The founding coalition partners are Bangladesh, Canada, Ghana, Mexico, Sweden, and the United States, together with the UN Environment Programme (UNEP).
Tästä kirjoitin 01 Jul 2012 Clintonin USAn suurlähetystössä pitämän esitelmän jälkeen.
Koalitioon on sittemmin liittynyt yli 30 valtiota Suomi mukaan lukien. CCACn pääkonttori sijaitsee Pariisissa.

Note: In addition to carbon dioxide (Global Warming Potential - GWP = 1), the other five greenhouse gases, methane (IPCC AR4 2007: GWP = 25 over 100 years), nitrous oxides (298), hydrofluorocarbons (14,800), perfluorocarbons (1,430) and sulphur hexa-fluoride (22,800) may be converted to the equivalent CO2.

28/08/2017

139 maassa 100% uusiutuvaa 2050 mennessä?

By the year 2050, a total of 139 countries could get their energy only from renewable sources such as water, wind and sun.
Researchers at the Stanford University say this would reduce energy consumption, since renewables are more efficient than fossil fuels, but also help create 24 million jobs, and reduce air pollution deaths by up to seven million per year.

Researchers from the university also assert that the conversion to all green energy will spare more than $20 trillion in health and climate costs every year.  [emp]

24/08/2017

100% uusiutuvaa - irti sähköverkosta

Ameren Corporation and S&C Electric Company announced that they had successfully conducted a 24-hour islanding test at the recently deployed Ameren microgrid in Champaign, Illinois. The test focused specifically on the 50-kW microgrid at the site, which powers an Ameren research facility. The complete microgrid includes 225 kW of renewable generation (PV solar and wind) and 250 kW / 500 kWh of battery energy storage.
The test began at 8 a.m. on Aug. 3, 2017, with the battery’s state of charge at 97 percent capacity. Once the battery was depleted to 90 percent capacity, solar and wind generation kicked in, simultaneously carrying the load and charging the battery. This pattern continued throughout the day, never letting the battery fall lower than 88 percent capacity. The microgrid functioned without any human interaction, automatically coordinating resources and ensuring power never faltered, according to the company.

“We have one of the few microgrids in the world that operates at utility-scale voltages and can seamlessly transition from grid-connected to islanded mode.”  [rew]

05/08/2017

Köpenhamina hiilineutraaliksi

How does a major European capital wean itself from fossil fuels and reinvent itself as a sustainable city? Having already cut its CO2 emissions by 38% since 2005, Copenhagen is in the process of finding out.
The 2025 Climate Plan focuses on energy efficiency, renewable energy production, green mobility, and exemplary use of energy by city government. Setting carbon-reduction goals for each area, the plan then shows, area by area and project by project, how the activities will reduce CO2[rew]
Hyvä kirjoitus Köpenhaminan toimenpideohjelmasta löytyy tästä.