Tác giả: Đào Thu Hằng

I'm from Hanoi, Viet Nam. I'm an author of Dot Chuoi Non (dotchuoinon.com/author/hangbelu/), a blog on Positive thinking, founded by Dr. Tran Dinh Hoanh, an attorney in Washington DC. I'm a co-founder of Conversations on Vietnam Development - cvdvn.net, a virtual think tank. I am a co-founder of two companies in Viet Nam working on children education services. I advise companies on STEAM education, English language education for children and students in Vietnam. I'm studying the Buddha's teaching and the teaching of Jesus. I practice mindful living including meditation. I hold a PhD on Sustainable Energy Systems from University of Lisbon and Aalto University. I graduated from Hanoi University of Technology on Environmental Engineering. I obtained a Master degree of the same major from Stanford University and Nanyang Technological University. My English-language blog at: hangbelu.wordpress/. I play table tennis as a hobby.

Bringing electricity to all corners of Southeast Asia

~ Đào Thu Hằng ~ Bình luận về bài viết này

IEA

By Ali Al-Saffar
IEA Energy Analyst
19 December 2017

Grid extensions have formed the bulk 

This commentary draws from the Southeast Asia Energy Outlook 2017, a WEO Special Report, published in October.

Providing electricity access for all remains a critical topic in many parts of the developing world. The challenge is especially acute in Southeast Asia, one of the most dynamic regions of the global energy system, but whose rich and varied environment defies one-size-fits-all energy solutions.

Thanks to growing economies and burgeoning and urbanising middle classes, energy demand in Southeast Asia grows at one of the fastest rates in the world. Still, around 65 million people across the ten Association of Southeast Asian Nations (ASEAN) countries are without access to electricity. In a recent special report on the region, we looked in detail at how to close this gap.
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China plans super-grid for clean power in Asia

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Financial times

As hydropower hits problems, China plans renewable energy for region

The Belt and Road Initiative (BRI), China’s ambitious outbound investment strategy which links at least 65 countries along terrestrial and maritime trade corridors, will open massive new opportunities for trade and investment in frontier markets. Energy infrastructure investments are a backbone of BRI, so aligning these investments with sustainable development goals is necessary for China to navigate regional patchworks of social, environmental and economic priorities. Tiếp tục đọc “China plans super-grid for clean power in Asia” →

The History of Electrification

~ Đào Thu Hằng ~ 1 bình luận

Edison Tech Center

The power grid started with long distance transmission and soon led to interconnected systems, these are some of the landmark early power generation sites.
Background
List of important early power sites
Sites by geography (interactive maps)

The power grid as we know it began with isolated power generation systems across the world starting in the 1870s. The growth and unification of the systems into an interconnected AC power ‘grid’ helped raise the quality of life of people from all classes.

Direct Current Beginnings:

DC power systems dominated in the 1870’s and 1880s. “Small” systems were sold to factories around the world, both in urban areas, and remote undeveloped areas for industrial/mining use. Thomas Edison, Charles Brush, and Werner von Siemenslead the industry in DC systems. DC systems powered factories and small downtown areas but did not reach 95% of residents. Electric lighting was a luxury found only in hotels and other businesses as well as in the mansions of people like George Westinghouse and J.P. Morgan. Tiếp tục đọc “The History of Electrification” →

Milestones in the development the power system in Vietnam

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EVN

  • Construction of the first 35 kV power line in the North

In January 1958, the first 35 kV power line (Hanoi – Pho Noi) was built and in the third quarter of the same year was inaugurated and successfully energized. This was a remarkable milestone in the development of the Vietnam power network.

  • Construction of the first large scale thermal power plant in the North

  Tiếp tục đọc “Milestones in the development the power system in Vietnam” →

Tuần lễ Năng lượng tái tạo Việt Nam 2018 – Vietnam Renewable Energy Week

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VSEA.info

No automatic alt text available.

[English Below]

Chuyển dịch sang phát triển năng lượng tái tạo đang trở thành xu thế tất yếu toàn cầu để ứng phó biến đổi khí hậu và phát triển Xanh. Chương trình “Tuần lễ Năng lượng tái tạo Việt Nam 2018” sẽ được tổ chức bởi Liên minh năng lượng bền vững Việt Nam (VSEA) và Nhóm Công tác về Biến đổi khí hậu (CCWG) trong thời gian từ ngày 21 – 26/8/2018 tại Hà Nội và một số tỉnh thành trong cả nước với một chuỗi sự kiện bao gồm hội thảo, tọa đàm, thăm quan thực địa, triển lãm và các sự kiện song song bên lề liên tiếp diễn ra trong vòng một tuần. Chương trình được đồng hỗ trợ tài chính bởi Liên minh Châu Âu, Đại sứ quán Đan Mạch và Tổ chức Bánh mì cho thế giới. Mục tiêu chính của chương trình năm nay hướng tới:

Tạo diễn đàn cho các bên liên quan đối thoại tìm ra các giải pháp nhằm tháo gỡ những khó khăn và thúc đẩy phát triển năng lượng tái tạo

Tăng cường nhận thức của công chúng về tính khả thi và các lợi ích của Năng lượng tái tạo và kêu gọi hành động

Khởi động và huy động sự quan tâm của các bên liên quan vào thực hiện chương trình Triệu ngôi nhà Xanh vì Việt Nam thịnh vượng.

Ban tổ chức kính mời Anh/Chị tới tham dự hội thảo được tổ chức tại Hà Nội với thông tin cụ thể như sau: Tiếp tục đọc “Tuần lễ Năng lượng tái tạo Việt Nam 2018 – Vietnam Renewable Energy Week” →

World Lightning Map: Lightning is not uniformly distributed across the Earth.

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geology.com

Article by: , Ph.D., RPG

world lightning map

lightning flash scale

World Lightning Map: The map above shows the average yearly counts of lightning flashes per square kilometer based on data collected by NASA’s Lightning Imaging Sensor on the Tropical Rainfall Measuring Mission satellite between 1995 and 2002. Places where less than one flash occurred (on average) each year are gray or light purple. The places with the largest number of lightning strikes are deep red, grading to black. Enlarge.

What is Lightning?

Lightning is a sudden high-voltage discharge of electricity that occurs within a cloud, between clouds, or between a cloud and the ground. Globally, there are about 40 to 50 flashes of lightning every second, or nearly 1.4 billion flashes per year. These electrical discharges are powerful and deadly.
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Thunderstorm activity and research on lightning position in Vietnam

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Vietnam is situated in the centre of the Asian thunderstorm region – one of three thunderstorm centres in the world. This article gives an overview of thunderstorm activity in Vietnam and results from the research on lightning position over the past year in Institute of Geophysics under the Vietnam Academy of Science and Technology.

Research on thunderstorms aims to observe and study thunderstorm activity over space and time, as well as exploring how and why lightning formulates. Research on lightning position aims to define the density of lightning (number of lightning flash/km2 /year), and also measure other lightning parameters such as the intensity and the slope of the lightning bolt. Lightning density is an important specific quantity for thunderstorm activity in each region. It requires complicated steps to determine a lightning bolts density. This value is different according to region, depending on characteristics in climate terrain and other weather conditions.

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Monsanto ordered to pay $289 million in world’s first Roundup cancer trial – Vụ kiện đầu tiên trên thế giới về thuốc diệt cỏ Round-up gây ung thư, Monsanto buộc phải bồi thường 289 triệu Đô

~ Đào Thu Hằng ~ 1 bình luận

(Reuters) – A California jury on Friday found Monsanto liable in a lawsuit filed by a man who alleged the company’s glyphosate-based weed-killers, including Roundup, caused his cancer and ordered the company to pay $289 million in damages.

FILE PHOTO: Monsanto Co's Roundup shown for sale in California

FILE PHOTO: Monsanto Co’s Roundup is shown for sale in Encinitas, California, U.S., June 26, 2017. REUTERS/Mike Blake/File Photo

The case of school groundskeeper Dewayne Johnson was the first lawsuit to go to trial alleging glyphosate causes cancer. Monsanto, a unit of Bayer AG following a $62.5 billion acquisition by the German conglomerate, faces more than 5,000 similar lawsuits across the United States.

The jury at San Francisco’s Superior Court of California deliberated for three days before finding that Monsanto had failed to warn Johnson and other consumers of the cancer risks posed by its weed killers.

SPONSORED

It awarded $39 million in compensatory and $250 million in punitive damages.

Monsanto in a statement said it would appeal the verdict. “Today’s decision does not change the fact that more than 800 scientific studies and reviews…support the fact that glyphosate does not cause cancer, and did not cause Mr. Johnson’s cancer,” the company said.

Monsanto denies that glyphosate, the world’s most widely used herbicide, causes cancer and says decades of scientific studies have shown the chemical to be safe for human use.
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Satellite Images Can Harm the Poorest Citizens

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theatlantic

In Ho Chi Minh City, computer analysis of orbital images overlooks some urban communities. To represent them, cities will have to put boots on the ground.

ANNETTE M. KIM 

An aerial view of the outskirts of Ho Chi Minh CityAn aerial view of the outskirts of Ho Chi Minh CityRAKSYBH / SHUTTERSTOCK

Mapping a city’s buildings might seem like a simple task, one that could be easily automated by training a computer to read satellite photos. Because buildings are physically obvious facts out in the open that do not move around, they can be recorded by the satellites circling our planet. Computers can then “read” these satellite photographs, which are pixelated images like everyday photographs except that they carry more information about the light waves being reflected from various surfaces. That information can help determine the kind of building material and even plant species that appears in an image. Other patterns match up with predictable objects, like the straight lines of roads or the bends of rivers.

It turns out to be more complicated than that. When three different research groups (including my own at the University of Southern California) processed almost the same images of Ho Chi Minh City’s rapid urbanization during the 2000s, we produced different results. All three groups agreed on the location of the city center, but mine mapped the city’s periphery differently. That’s the place where most megacities in the global South exhibit their most dramatic physical growth. In particular, we identified more of the informal, self-built housing in the swampier southern area of the city.
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Vietnam increasingly reliant on imported energy

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Vietnamnet.vn

Due to limited domestic supply, Vietnam has become increasingly dependent on energy imports, putting national energy security at risk, Nguyen Van Thanh, deputy head of the Electricity and Renewable Energy Department under the Ministry of Industry and Trade, told the Vietnam Technology and Energy Forum 2018 on July 31.

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An active hydropower dam 

According to a report by the Electricity and Renewable Energy Department, after executing the national energy development strategy by 2020 with a vision to 2050 for 10 years, the local energy sector has achieved positive results. However, some targets have yet to be fulfilled.

Dung Quat and Nghi Son oil refineries are likely to reach a combined processing capacity of 16.5 million tons of crude oil by 2020, well below the estimate of 25-30 million tons. Tiếp tục đọc “Vietnam increasingly reliant on imported energy” →

Vietnam is reducing carbon emissions by transforming pig waste into energy

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Qz.com

Echo Huang July 28, 2018

Hanoi, Vietnam

Le Thi Vinh used to put up with a smoky kitchen, filled with soot particles formed in her muddy stove. That changed in late 2016, when she stopped using firewood but turned to biogas, generated from the waste of the 46 pigs she raises. The biogas generated is enough to support a family of four for three meals a day. But it’s not cheap—the biodigesters needed to make the gas cost about $600 to build, five times Le’s monthly income of VND 3 million ($130).

Le, a 53-year-old farmer, is among the 7 million living in Hanoi, Vietnam’s capital and its second most populous city. The city is filled with diesel-powered motorcycles, some 5 million, choking the air and causing traffic jams.

But Hanoi is changing. In addition to an ambitious plan to ban motorbikes by 2030, Hanoi is one of 63 provinces and cities in the country that is adopting biogas for cooking. Le used her own savings and borrowed money from relatives to build the biodigesters, which are part of a program funded by the Dutch government that uses Chinese technology. The goal of using biogas is to both breathe cleaner air and fight against climate change, one of the biggest challenges of the century.

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Animals and fungi enhance the performance of forests

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sciencedaily.com

Study based on ten years of research in subtropical forests

Date:August 1, 2018

Source:German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig

Summary:In addition to the diversity of tree species, the variety of animal and fungus species also has a decisive influence on the performance of forests. Forest performance comprises many facets besides timber production, such as carbon storage and climate regulation. The study is based on ten years of research in species-rich subtropical forests.

FULL STORY
Spiders and other animals are important for forest ecosystems.
Credit: Jula Zimmermann

A new study shows that, in addition to the diversity of tree species, the variety of animal and fungus species also has a decisive influence on the performance of forests. Forest performance comprises many facets besides timber production, such as carbon storage and climate regulation. The study is based on ten years of research in species-rich subtropical forests. A team of researchers led by the German Centre for Integrative Biodiversity Research (iDiv) and the Martin-Luther-University Halle-Wittenberg has published the results in the new issue of Nature Communications. They illustrate that biodiversity must be viewed as a whole in order to maintain the performance of forests.

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Công trình Hiệu quả Năng lượng – Góc nhìn toàn diện: Thiết kế – Xây dựng – Vận hành

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tapchikientruc.com.vn

Công trình cần được Thiết kế – Xây dựng – Vận hành như thế nào để đảm bảo tối ưu hóa tiện nghi cho người sử dụng trong khi vẫn hiệu quả về sử dụng tài nguyên (năng lượng, nước, vật liệu….) và giảm tác động đến môi trường? Điều này đòi hỏi sự tham gia của tất cả các bên ngay từ giai đoạn ban đầu trong quá trình hình thành đến khi kết thúc các dự án xây dựng.

Bộ Quy chuẩn Kỹ thuật Quốc gia về Công trình Hiệu quả năng lượng (QCVN 09:2017/BXD) do Bộ Xây dựng  ban hành năm 2018 là phiên bản cập nhật của QCVN 09:2013/BXD do thực trạng áp dụng những năm vừa qua còn ở mức rất thấp. Song song cập nhật, điều chỉnh trong hành lang pháp lý từ phía cơ quan nhà nước, mỗi dự án xây dựng cần có sự tham gia từ tất cả các bên tham gia (đơn vị đầu tư, nhà thầu, tư vấn, thi công xây dựng, vận hành….) ngay từ khâu hoạch địch mục tiêu bền vững cho đến khi thiết kế, vận hành và kết thúc vòng đời công trình để đạt được tiêu chí bền vững, hiệu quả năng lượng và tài nguyên. Tiếp tục đọc “Công trình Hiệu quả Năng lượng – Góc nhìn toàn diện: Thiết kế – Xây dựng – Vận hành” →

Brace yourself for more record heat

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DW

Current high temperatures in the northern hemisphere are set to continue. Climate change means we’re likely to experience very hot summers more often — even though we’re already struggling with health consequences now.

    
Bildergalerie : Sommer / Abkühlung (picture-alliance/dpa)

Europe is in the throes of a heat wave, and it’s not letting up — on the contrary. More hot air is coming over from Africa, and is even bringing desert dust with it.

Southwestern European countries are being hit especially hard. Authorities in Portugal issued a nationwide health warning, including for dust from the Sahara. Warnings were also issued for 40 of Spain’s 50 provinces. The southeastern Portuguese town of Beja is expected to see a peak of 47 degrees Celsius (117 degrees Fahrenheit) on Saturday.
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