Showing posts with label Air Pollution. Show all posts
Showing posts with label Air Pollution. Show all posts

Thursday, June 12, 2014

Chinese renewables sector

Greetings from the Australian National University in Canberra, where Professor Loren Brandt from University of Toronto is speaking on The Chinese renewables sectors: A case of wilting greens?". He pointed out that manufacturing makes up 85 to 90% of Chinese exports.As ell as economists, he argues that engineers are needed in the analysis of China's industry. An overriding issue for the Chinese government is to maintain economic growth. This is an issue, I suggest the current Australian government sees as an overriding issue, placing climate change as a lower order issue. Professor Brandt showed a photo of Beijing smog as an example of the environmental problems. The issue for the Chinese government is to address serious environmental problems without harming economic development. This I suggest becomes a priority for the government when the environmental problem become so severe it causes dissent by the citizens.

Professor Brandt pointed out that Chinese policy promoted solar and wind power and this has been well received by commentators. As well as providing power, China has established significant international renewable energy industries. China provides about two thirds of the world's photovoltaic panels.

However, Professor Bandt cautioned that the rapid growth of the renewable sector caused inefficiencies, with a lack of coordination within the power system and levels of government. Also the incentives for firms cause distortion. Similar problems occur throughout the Chinese economy.

Professor Bandt expressed concern that half of GDP goes to investment. Half of the investment goes to high return investment and half to very low return investments

While renewables have been expanding rapidly in China, but they are still a small proportion of generating capacity. Professor Bandt showed a graph showing that thermal energy (mostly coal) dominates Chinese energy use.This is of relevance to Australia, which no only can continue to sell coal to China, but also technology for increasing the efficiency of coal use, such as CSIRO's Direct Injection Carbon Engine (DICE) and Direct Carbon Fuel Cell (DCFC).

 Professor Band pointed out that within six years China was able to go from foreign firms in China to Chinese firms supplying their own market. This did not seem surprising to me as the Chinese government has policies requiring foreign firms to partner with local firms to encourage technology transfer. A similar transfer has taken place with high speed railway and automotive industries. Other countries, such as Korea, take a similar approach. In some areas foreign firms have been reluctant to supply advanced products for fear of being copied by Chinese firms (particularly in the defence and aerospace industry with Russian military aircraft).

Professor Bandt  pointed out that the wind turbines are installed in the sparsely populated remote north west and north of China, whereas the demand is in the coastal south east. The result is that perhaps 15% of the potential wind generating capacity is not being used. The generated power can't be transmitted to where it is required. This is where, as Professor Bandt pointed out, some engineering knowledge is needed. Apart from increased grid capacity and installing capacity nearer the users, it may be possible to utilize storage to better use renewable capacity. If wind power can be stored it can then be provided when needed

Professor Bandt argued that China's industry success has been based on incremental improvements on existing western technology. I am not sure that such an analysis make much sense. In particular, major improvements can be made with a product with what appear to be small improvements, by improving the manufacturing process. The end product may not look much different, but it will be much cheaper and more reliable. Cost and reliability are very important in the energy industry and in others (such as transport).

Professor Bandt argued  that the Chinese government policy is distorting company's R&D policy by setting priorities which may not match the customer's requirements. He gave the example of incentives for Chinese wind turbine developers to make larger units. However, there are economies of scale with wind turbines, so it makes sense to aim for size. Professor Bandt argued that China's wind turbine companies were not competitive outside China.

In contrast with wind turbines Professor Bandt argued that the photovoltaic panel industry had been successful with exports, perhaps due to less government policy. I suspect this partly because economies of scale and incremental production processes have favoured solar cells.

One aspect which Professor Bandt did not mention was the need for highly trained and experienced staff to design and build products. Also it would be interesting to consider how much of this analysis would apply to the service sector. As an example, how efficient is China's university sector and can it compete with western universities.

Thursday, February 06, 2014

Solar Coal to Reduce Air Pollution in China

Greetings from the Australian National University in Canberra,where Professor David Y.H. Pui, from the University of Minnesota, in speaking on "PM2.5 in China: Sources, Effects, Mitigation, and Its Impact on Energy Industry". Professor . Pui related how the US Embassy in Beijing published air pollution readings, including 2.5 μm particles, much to the annoyance of the Chinese government. But readings for this are now published for major Chinese cities. A previous standard was PM10, that is 10 μm particles, based on what would be small enough to enter the lung. Much smaller particles, including engineered nano-particles, can enter all the way to the Alveoli. Also particles around 2.5 μm from combustion can remain suspended in the air for weeks.Particle density can be measured in real time by applying an electrical charge, or more simply by using a filter and air pump.The major sources of emissions in China are coal combustion and vehicle engines. As well as primary particles from combustion, there are particles created by the reaction of gas exposed to sunlight (photochemical smog).

Professor Pui pointed out that since the introduction of standards in the USA, air pollution and also death rates have dropped. Northern Chinese cites have pollution levels ten to hone hundred times the US standard.

Filters can be used to remove particles from coal combustion at power stations and vehicle engines. Baghouse filters can be sued in power plants to collect dust. Modern filters have a PTFE membrane on a fabric (like Gortext jacket). Diesel vehicle engines can use a ceramic filter which is cleaned by high temperatures periodically.

Professor Pui pointed out that the cabin air filter in a modern can can remove most of the air particles within three minutes, with air recirculating.

China will implement a standard for PM2.5 three time the US standard in 2016. It would take northern Chinese cities 20 years to meet the standards, without new measure, such as conversion of coal power stations to natural gas. But the higher cost of natural gas will limit this. Gasification of coal could be used as a lower cost alternative.  Concentrated solar power could be used for gasification of coal to produce synthetic gas could be a longer term solution.

I suggest it would be interesting to see if solar powered gasification of coal would be an option for Australia. This could provide a political solution for Australian governments which need to reduce carbon emissions,while not being seen to be cutting jobs in the coal mining industry. This could be particularly useful for Victoria, which has large reserves of low quality wet brown coal. This process could also be applied to garbage and biomass. See: "Biomass Gasification using Solar Thermal Energy" (Munzinger and Lovegrove, ANU, 2013).
ABSTRACT:
PM2.5 (Particulate Matter less than 2.5 μm) was established by the U.S. Environmental Protection Agency in 1997 as the standard method for sampling fine particles, because of concern over the health effects of fine particles in the ambient environment. The Particle Technology Laboratory (PTL) has developed many instruments and samplers to perform atmospheric measurements, which helped to establish the PM2.5 standard. The effects of PM2.5 pollutants on the atmospheric visibility and human health will be addressed. PM2.5 sources in China have been identified to come from pollutants from coal burning (approx. 40%) and from vehicle emissions (approx. 25%). The strategy for pollution control must be based on reducing the pollutants from these two primary sources. Filtration is one of the principal means to control PM2.5 pollutants. Baghouse filters are used to reduce emissions from coal-fired power plants and Diesel and Gasoline Particulate Filters (DPF and GPF) are used to reduce vehicle emissions. The PM2.5 impact, both short-term and long-term, to the energy industry will also be addressed. An integrative approach, from collaboration among academia, government, and industries, can effectively manage and mitigate the PM2.5 pollutants in China.
BIO:
David Y. H. Pui, a Distinguished McKnight University Professor, is the L.M. Fingerson/TSI Inc Chair in Mechanical Engineering and the Director of the Particle Technology Laboratory and of the Center for Filtration Research, University of Minnesota. He has a broad range of research experience in aerosol science and technology and has over 230 journal papers and 22 patents. He has developed/co-developed several widely used commercial aerosol instruments. Dr. Pui is a fellow of the American Society of Mechanical Engineers (ASME), and has received many awards, including the Max Planck Research Award (1993), the Humboldt Research Award for Senior U.S. Scientists (2000), the Fuchs Memorial Award (2010)--the highest disciplinary award conferred jointly by the American, German and Japanese Aerosol Associations, and the Einstein Professorship Award (2013) by the Chinese Academy of Sciences (CAS). He was a past President of the American Association for Aerosol Research (AAAR) and of the International Aerosol Research Assembly (IARA) consisting of 16 international aerosol associations.

Thursday, January 09, 2014

Air Pollution and the Energy Industry in China

Professor David Y.H. Pui, from the University of Minnesota, will speak on "China: Sources, Effects, Mitigation, and Its Impact on China: Sources, Effects, Mitigation, and Its Impact on Energy Industry", in the Ian Ross Seminar Room, Ian Ross Building, at the Australian National University in Canberra, 2pm, 6 February 2014.


ABSTRACT:
PM2.5 (Particulate Matter less than 2.5 Am) was established by the U.S. Environmental Protection Agency in 1997 as the standard method for sampling fine particles, because of concern over the health effects of fine particles in the ambient environment. The Particle Technology Laboratory (PTL) has developed many instruments and samplers to perform atmospheric measurements, which helped to establish the PM2.5 standard. The effects of PM2.5 pollutants on the atmospheric visibility and human health will be addressed. PM2.5 sources in China have been identified to come from pollutants from coal burning (approx. 40%) and from vehicle emissions (approx. 25%). The strategy for pollution control must be based on reducing the pollutants from these two primary sources. Filtration is one of the principal means to control PM2.5 pollutants. Baghouse filters are used to reduce emissions from coal-fired power plants and Diesel and Gasoline Particulate Filters (DPF and GPF) are used to reduce vehicle emissions. The PM2.5 impact, both short-term and long-term, to the energy industry will also be addressed. An integrative approach, from collaboration among academia, government, and industries, can effectively manage and mitigate the PM2.5 pollutants in China.
BIO:
David Y. H. Pui, a Distinguished McKnight University Professor, is the L.M. Fingerson/TSI Inc Chair in Mechanical Engineering and the Director of the Particle Technology Laboratory and of the Center for Filtration Research, University of Minnesota. He has a broad range of research experience in aerosol science and technology and has over 230 journal papers and 22 patents. He has developed/co-developed several widely used commercial aerosol instruments. Dr. Pui is a fellow of the American Society of Mechanical Engineers (ASME), and has received many awards, including the Max Planck Research Award (1993), the Humboldt Research Award for Senior U.S. Scientists (2000), the Fuchs Memorial Award (2010)--the highest disciplinary award conferred jointly by the American, German and Japanese Aerosol Associations, and the Einstein Professorship Award (2013) by the Chinese Academy of Sciences (CAS). He was a past President of the American Association for Aerosol Research (AAAR) and of the International Aerosol Research Assembly (IARA) consisting of 16 international aerosol associations.