12 February 2018, Climate News Network, Hydrogen could see off fossil fuels. Hydrogen is the least talked-about renewable energy but has the greatest potential to replace fossil fuels, both to heat homes and to provide fuel for road transport. The possibility of using hydrogen has been known about for generations, but only in the last two years has it become both practical and financially viable to see it as a large-scale competitor to both gas and oil. Networks of hydrogen filling stations are now being opened in Europe and parts of the US. Batteries for road transport have attracted most of the recent publicity around renewables and have become the focus of many governments with targets for switching away from petrol and diesel, particularly in cities with air pollution problems. But hydrogen has even greater potential because its only emissions are pure water and warm air. Storage potential What has made hydrogen so attractive is that it can use surplus renewable electricity from wind and solar farms by using electrolysers to produce hydrogen. This is a process of passing an electric current through water and converting it into oxygen and hydrogen. The hydrogen can then be stored. Read More here
Category Archives: New Energy Sources
15 January 2018, Climate News Network, District heating warms cities without fossil fuels. Heating homes and offices without adding to the dangers of climate change is a major challenge for many cities, but re-imagined district heating is now offering an answer. A district heating scheme is a network of insulated pipes used to deliver heat, in the form of hot water or steam, from where it is generated to wherever it is to be used. As a way of providing warmth for thousands of homes, typically in multi-storey apartment buildings, district heating has a long history in eastern Europe and Russia. But the hot water it distributes typically comes from power stations burning coal or gas, which means more greenhouse gas emissions. Tapping into other forms of producing hot water, from renewable energy, bio-gas or capturing waste heat from industrial production, supermarkets or IT systems, provides alternative sources of large scale heating without adding to the carbon dioxide in the atmosphere. Sweden has pioneered the switch from fossil fuels to other ways of heating water. The Swedish Environmental Protection Agency says the country has gone from almost exclusively relying on fossil fuels to being 90% powered by renewable and recycled heat in 2017. Read More here
19 December 2017, CSIRO-ECOS, Refining the accounts on canola emissions savings. BIOFUELS are about to work even harder to prove their renewable worth, under new European Union rules. From 2018 the European Commission’s Renewable Energy Directive mandates that biofuels must demonstrate a 50 per cent emissions saving compared to their fossil fuel companions (or a 60 per cent saving when produced in refineries constructed after October 2015), compared to a flat 35 per cent saving now. CSIRO was commissioned by the Australian Oilseed Federation and the Australian Export Grains Innovation Centre to assess the greenhouse gas emissions of growing canola in Australia, in order to continue exports to the European Union for use as a feedstock for biodiesel under the new rules. In 2016/17, more than 3.1 million tonnes of Australian canola was exported to the EU, worth around $1.8 billion. EU buyers can pay a $20-40 per tonne premium for non-genetically modified canola (which Australia primarily produces), making the EU export market one with a cool $100 million premium riding on it. The vast majority of this canola (91 per cent in 2015-16) is used to make biodiesel. To secure this important export market the Australian industry needed to demonstrate that canola can be grown at a low enough carbon footprint so that once all the other processes of shipping and refining are added, the final product can be deliver to the customer at the fuel bowser within the target saving of 50-60 per cent. We are happy to say it did. Read More here
6 September 2017, IOL Motoring The hydrogen vs battery car debate is far from over. London – With hybrid and full electric cars now becoming mainstream, it may seem as though the early debate between hydrogen and battery power is over. But batteries have considerable drawbacks. They’re heavy, they’re expensive, they require the extensive use of rare earth metals, and the production of lithium-ion batteries is itself an energy-intensive process that creates considerable emissions. Despite the progress made in EV technology, most car companies are predicting it will be a long time before batteries become dramatically cheaper or lighter than they are today. Speaking to investors last year, Stefan Juraschek, vice president of electric-powertrain development at BMW, said the car maker needed to “walk through the valley of tears” of funding highly costly research and development in order to make significant progress on battery power. Electric cars require energy straight out of the mains, which could come from power plants that are not using renewable technology. In Tesla’s home state of California, 60% of electricity was provided by coal and gas power stations in 2015, while only 14% came from wind and solar. China is investing more in renewables than any other nation yet derived roughly 72% of its electricity from coal power in 2014. In a hydrogen fuel cell car (FCEV), electric motors power the wheels but the energy is supplied through a chemical reaction between hydrogen and oxygen in the fuel cell. Unlike the rare and heavy components needed to build a battery, hydrogen is the most abundant and lightest element in the known universe although it is worth noting that hydrogen drivetrains also require rare materials. Read More here