Facts about renewable energy

At present, renewable energy plays an important role in meeting people’s increasing demand for energy. Renewable energy resources are abundant and available in the nature and exist in many forms.

Of which, solar power, which is nearly inexhaustible and is being exploited in many parts worldwide, has emerged as an ideal option to replace traditional energy resources.

Facts about renewable energy
A solar farm in the southwestern border area.

In the middle of November, the 38th ASEAN Ministers on Energy Meeting, agreed to increase the proportion of renewable energy to 23% in the energy resource structure and reduce the energy intensity - used to measure the energy inefficiency in the economy - to 32% by 2025. In addition, 10 ASEAN member countries, including Vietnam, will continue building a roadmap on renewable energy development through programs and plans to reach targets.

A representative of the European Union (EU) said the EU had also issued preferential policies on the energy development and improved the prospects for the ASEAN-EU cooperation in the sustainable energy transition in ASEAN. 

Solar power-an indispensable option

Obviously, in the new era, renewable energy has demonstrated its superiority in contributing to the sustainable socioeconomic development. The world is facing multiple problems, including environmental pollution, global warming, extreme climate change and dreadful natural disasters. Does the development still make sense when people have to pay dearly for the overexploitation of fossil energy resources to serve thermal power projects, destruction of natural forests and change of the flow of rivers and lakes to build hydropower plants, breaking down the natural ecosystem and causing great impacts on the living environment of the current and future generations.

According to the Institute of Energy under the Ministry of Industry and Trade, Vietnam has potential to produce some 1,700 gigawatts of solar power. In the high economic growth scenario, Vietnam will need 385.8 gigawatts of solar power by 2030 to serve the economic development.

Negative information and opinions can impede the development of solar power in Vietnam. It was said that out-of-date solar panels will become hazardous waste for the environment and need treating. This is a subjective and biased judgment.

Is it a mistake to say out-of-date solar panels are hazardous waste?

According to Dao Minh Hien, MS, director of the Research and Development Center at Power Engineering Consulting Joint Stock Company 2, solar panels includes many solar cells, which are semiconductors converting the energy of light directly into electricity by the photovoltaic effect.

The main material to produce photoelectric cells is single-crystal or poly-crystal silicon or thin-film silicon, which is the main component of solar panels. 

Main parts of solar panels:

Facts about renewable energy
Photoelectric cells

Frame is made of aluminum.

Glass is safe tempered glass, which is made of glass with the main ingredient being silicon dioxide, a common material to produce glass containers and bottles.

Encapsulant is a thin polymer layer which combines ethylene and acetate and is produced through polymerization under high pressure. Encapsulant will help connect photovoltaic cells and tempered glass to prevent being broken and lengthen the lifespan of photovoltaic cells.

Backsheet is made of polyvinyl fluoride, a polymer material mainly used in aircraft interior equipment and raincoats. As for some better solar panels, their backsheets are made from tempered double glass, which can protect the underside of photoelectric cells from abrasion.

Junction box: the box is a type of polymer that is resistant to heat, fire, weather and ultraviolet rays. Connectors in the box are made of brass and coated with silver or tin.

Facts about renewable energy
The structure of a solar panel.
 

Wires are made of copper or silver to connect photoelectric cells with the junction box.

It is obvious that the main components of solar panels do not contain hazardous substances. So why were out-of-date solar panels said to become hazardous waste and need treating?

Such an inaccurate judgment comes from the name of solar panels in Vietnamese - “PIN MAT TROI” and their component - “CELL”

“PIN” in Vietnamese is “PILE” in French and “BATTERY” in English, which is also called “ACCU” in French and “AC QUY” in Vietnamese.

During the French colonial period, flashlights and radios using batteries were popular among rich noblemen and landlords in Vietnam. In the 20th century, batteries branded “Con O” (Eagle) or “Con Tho” (Rabbit) were popular.

Therefore, when “PIN” is mentioned, many people may think of hazardous substances, such as acid and lead; and solar panels face the same fate.

Facts about renewable energy
A flashlight and two Con O (Eagle) batteries.

Why are solar panels called “PIN MAT TROI” in Vietnam?

It comes from the word “CELL”.

In daily life, when buying batteries for their laptops or mobile phones, many people often ask “How many cells does this battery have? – “four or six?” This is a simple way to ask about the capacity of batteries.

Solar panels and batteries have the following similar characteristics:

Accumulators also have cells with a voltage of several volts. These cells create modules, which connect together to form racks and eventually a charged system.

Facts about renewable energy
The structure of a charged system.

Similarly, photoelectric cells in solar panels connect together to create modules or panels, which link together to become arrays or tables and eventually the solar power system.

Facts about renewable energy
The structure of a photovoltaic solar panel system.

Therefore, solar panels in Vietnamese are called “PIN MAT TROI” due to this similarity. However, solar panels are not hazardous waste.  SGT

Thanh Dung   

Waste solar panels can be recycled: scientists

Waste solar panels can be recycled: scientists

A researcher on renewable energy, Dr Vo Viet Cuong, from the Electrical and Electronic Engineering Faculty under the HCM City University of Technology and Education, has noted that there is no absolutely clean energy.

Time to think about recycling of end-of-life solar panels: experts

Time to think about recycling of end-of-life solar panels: experts

The growth of solar power generation in Vietnam has come alongside increasing concern over the disposal of end-of-life solar panels in the coming decades.

 
 

Other News

.
Vietnam’s tech shops stay up all night selling iPhone 13
Vietnam’s tech shops stay up all night selling iPhone 13
SCI-TECH & ENVIRONMENTicon  23/10/2021 

On October 22, sales of officially distributed iPhone 13 models began in Vietnam. Many shops opened overnight to serve customers.

Apple takes steps to reduce “hand-carried” iPhone market in Vietnam
Apple takes steps to reduce “hand-carried” iPhone market in Vietnam
SCI-TECH & ENVIRONMENTicon  22/10/2021 

The market for “hand-carried” iPhones in Vietnam has been shrinking in the past two years, especially after the launch of Apple-authorized stores.

Rice husks: From waste to new green energy
Rice husks: From waste to new green energy
SCI-TECH & ENVIRONMENTicon  22/10/2021 

Intensive efforts are underway with support from diverse stakeholders to promote the sustainable use of rice husks and other biomass resources for electricity and heat production throughout Vietnam.

Investigation launched to find killers of endangered langurs in Quang Ngai
Investigation launched to find killers of endangered langurs in Quang Ngai
SCI-TECH & ENVIRONMENTicon  22/10/2021 

Local ranger and police forces have been tracking illegal hunters who killed five grey-shanked douc langurs (pygathrix cinerea). 

Hanoi faces waste storage crisis
Hanoi faces waste storage crisis
SCI-TECH & ENVIRONMENTicon  22/10/2021 

Xuan Son Landfill in Hanoi's Son Tay Town stopped receiving waste from October 6 due to overloading. Local authorities have had to move all rubbish to the Nam Son Landfill in Soc Son District which is also reaching full capacity.

About 800 delegates to attend virtual Vietnam Security Summit 2021
About 800 delegates to attend virtual Vietnam Security Summit 2021
SCI-TECH & ENVIRONMENTicon  21/10/2021 

The Vietnam Security Summit 2021 will be held via videoconference on October 27-28, with the participation of about 800 delegates across various fields.

Ministry launches program to detect vulnerabilities of national digital transformation platforms
Ministry launches program to detect vulnerabilities of national digital transformation platforms
SCI-TECH & ENVIRONMENTicon  20/10/2021 

The Ministry of Information and Communications (MIC) has kicked of a program called “Bug Bounty” to find security holes in all national digital conversion platforms.

What is Vietnam’s role in the International Telecommunication Union?
What is Vietnam’s role in the International Telecommunication Union?
FEATUREicon  19/10/2021 

Secretary General of the International Telecommunication Union (ITU) Houlin Zhao praised the proposals and initiatives of Vietnam and hoped that it would share its experiences with other ITU member countries.

Science and technology ministry to study new SARS-CoV-2 testing methods
Science and technology ministry to study new SARS-CoV-2 testing methods
SCI-TECH & ENVIRONMENTicon  19/10/2021 

The Ministry of Science and Technology will research the production of COVID-19 vaccines, treatment drugs and new SARS-CoV-2 testing methods, said Minister of Science and Technology Huynh Thanh Dat.

Winners of Viet Solutions 2021 announced
Winners of Viet Solutions 2021 announced
SCI-TECH & ENVIRONMENTicon  19/10/2021 

Winners of Viet Solutions 2021, a contest seeking digital transformation solutions for Vietnam, were announced at a ceremony held by the Ministry of Information and Communications in Hanoi on October 18.

Five rare gray-shanked douc langurs shot dead in central Vietnam
Five rare gray-shanked douc langurs shot dead in central Vietnam
SCI-TECH & ENVIRONMENTicon  19/10/2021 

A group of hunters have been suspected of shooting dead five rare gray-shanked douc langurs in a forest in Quang Ngai province, central Vietnam, local authorities said on October 18.

Vietnam holds potential for robot, AI development: insiders
Vietnam holds potential for robot, AI development: insiders
SCI-TECH & ENVIRONMENTicon  17/10/2021 

Vietnam holds huge potential in the application and development of new technologies amid the wide utilisation of robot and artificial intelligence (AI) in daily life activities.

Vietnamese Innovation Network in Europe debuts
Vietnamese Innovation Network in Europe debuts
VIETNAM & WORLDicon  17/10/2021 

The Vietnamese Innovation Network in Europe (VINEU) was launched at a ceremony held at the Embassy of Vietnam in Germany and via videoconference on October 16.

ITU Ministerial Conference: Cost reduction is key for digital transformation
ITU Ministerial Conference: Cost reduction is key for digital transformation
SCI-TECH & ENVIRONMENTicon  16/10/2021 

Access to low-cost technology was the topic of a discussion session of the ITU Ministerial Roundtable that took place on October 12-14.

Which Vietnamese tech giants display at ITU Digital World?
Which Vietnamese tech giants display at ITU Digital World?
SCI-TECH & ENVIRONMENTicon  16/10/2021 

Vietnamese technology enterprises have showcased many Make-in-Vietnam solutions and products at the 2D and 3D online booths of the ITU Digital World 2021.

Where is Vietnam in the technology industry and global supply chain?
Where is Vietnam in the technology industry and global supply chain?
FEATUREicon  16/10/2021 

At the talks “Why Vietnam” held recently by the Ministry of Information and Communications, experts affirmed the significant role and position of Vietnam in the technology industry as well as global supply chains.

Together, ITU member countries can help to digitally connect everyone by 2030
Together, ITU member countries can help to digitally connect everyone by 2030
SCI-TECH & ENVIRONMENTicon  16/10/2021 

The ITU Digital World 2021 with the theme "Joining hands to build a digital world" organized online by Vietnam’s Ministry of Information and Communications and ITU has closed

Vietnamese scientist awarded silver medal of the National Academy of Sciences of Belarus
Vietnamese scientist awarded silver medal of the National Academy of Sciences of Belarus
VIETNAM & WORLDicon  15/10/2021 

The National Academy of Sciences of Belarus has presented Professor Chau Van Minh, President of Vietnam Academy of Science and Technology (VAST), its Silver Medal.

ITU Digital World: broadband infrastructure helps reduce unemployment
ITU Digital World: broadband infrastructure helps reduce unemployment
SCI-TECH & ENVIRONMENTicon  15/10/2021 

The topic "Strengthening infrastructure development: The government’s role in digital transformation" was discussed by ministers and experts at the ITU Ministerial Roundtable’s discussion.

Technological autonomy the basis for Vietnam’s success
Technological autonomy the basis for Vietnam’s success
SCI-TECH & ENVIRONMENTicon  15/10/2021 

Minister of Information and Communications Nguyen Manh Hung has met with Secretary General of the International Telecommunications Union (ITU) Houlin Zhao, who is attending the ITU Digital World 2021 hosted by Vietnam.

 
 
 
Leave your comment on an article

OR QUICK LOGIN