In today’s program, we’ll learn about wave power and how it could be the future source of clean energy for our planet. Wave power, also known as marine or ocean energy, captures the energy of tides, currents, and wind waves from the world's oceans, to generate renewable power. Unlike wind and solar conditions, the status of waves or swells can be easily forecast for periods of 48 to 72 hours in advance, making the availability of wave energy easy to predict.
Various methods for harnessing ocean energy currently exist. We’ll next cover some of the most common approaches. “Let’s start with the tides. It is estimated that together, tidal currents and tidal turbines can produce as much as 0.9 terawatts, which would be quite a significant fraction of the global energy production. The other methods that we can use to generate electricity from the ocean come from a different system. And here we are harnessing the waves. So, the ocean has a lot of surface waves that go up and down. And what we can devise is different systems that take advantage of being thrown up and down with the ocean currents and release that kinetic energy and turn it into electricity. The third way you can induce energy from the ocean is you can harness the power of the great ocean currents.”
Many scientists and energy companies are working on and testing devices to harness wave energy from the oceans. Let’s look at some of the advances that have taken place in this field. Together with his team at the University’s Theoretical and Applied Fluid Dynamics Laboratory, Dr. Alam has developed a “wave carpet” that extracts energy from ocean waves and transforms it into electricity that can be used in households and cities, and can boost local supplies of freshwater. One of the most promising technologies to emerge recently for harnessing wave energy comes from “down under,” from the Australian Wave Swell Company. Another company planning to follow their lead is CorPower, a Swedish wave-energy developer founded in 2009. CorPower Ocean is bringing a new class of high-efficiency wave energy converter to market, enabling robust, cost-effective harvesting of electricity from ocean waves. The company hopes to have wave-energy technology up and running by 2024.
今天的節目,我們將了解波浪發電與它如何能成為地球未來潔淨能源的來源。波浪發電,也稱為海洋能源,是取得世界海洋的潮汐、洋流與風浪的能量,產生可再生電力。不像風能與太陽能的情況,波浪或漲潮的狀態在四十八小時至七十二小時之間可以先輕易地預測,讓波浪能源的獲得容易預期。
目前已有不同的方式可利用海洋能量。我們將介紹一些最常用的方式。「讓我們從潮汐開始。根��
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https://www.youtube.com/watch?v=LMJj3vBASXI
On today’s program, we’ll explore zero-carbon hydrogen energy, how it works, and the technologies used to produce it. So, what exactly is hydrogen energy? Hydrogen energy is the process of using hydrogen, a clean fuel, to generate electrical power. It’s called a clean fuel because if the energy used to produce that hydrogen is from renewable sources, such as wind or solar power, then using that hydrogen doesn’t directly contribute to climate change or increase our carbon footprint.
Hydrogen is also derived from a process called electrolysis, that splits water into hydrogen and oxygen using an electrical current. Electrolysis technology has been adopted by many companies around the world. In addition, seven of the world’s green hydrogen leaders, ACWA Power, CWP Renewables, Envision, Iberdrola, Orsted, Snam, and Yara announced a global coalition that will accelerate the scale and production of green hydrogen 50-fold in the next six years, helping to transform the world’s most carbon-intensive industries, including power generation, chemical manufacturing, steel making and shipping.
Hydrogen can be produced from the Sun’s energy. There are currently two methods used for this. In the first, solar energy is converted into electricity using a photovoltaic cell and then hydrogen is generated through the electrolysis of water, as explained already. A team from Australian National University (ANU) has successfully developed a way to split water to create energy using this technology. In an alternative method, photo-electrochemical cells are used to directly produce hydrogen. Besides all these methods, hydrogen can also be produced by biological water splitting and by burning sustainably produced fuels, including alcohol from fermenting food or food wastes, and biomass, such as wood chips. It can also be produced using wind energy.
Thank you, researchers, scientists and engineers, for working diligently to develop green hydrogen energy technology. Our Beloved Supreme Master Ching Hai recommends people to go vegan first so that we have enough time to develop green hydrogen and other sustainable forms of energy that can replace fossil fuels.
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https://www.youtube.com/watch?v=H5OKX1dcXDc
In today’s news
今天新聞提要:
World Bank supports green pandemic recovery in Brazil
世界銀行協助巴西綠色疫情復甦;
Researchers show sea ice loss a climate tipping point
研究者顯示海冰消失已達氣候變遷轉捩點;
Scientists discover only certain plants make vital energy contributions to food web
科學家發現只有某些植物可提供食物網重要能量;
Nearly 20% of ocean floor now mapped in scientific endeavor
目前海底已有二十%經科學測量繪製地圖;
Former child landfill scavenger now assists impoverished in Nairobi, Kenya
之前在掩埋場撿拾的孩童現助肯亞奈洛比的窮人;
Vegan seven-time Formula One champion Sir Lewis Hamilton honored by BBC
純素主義者一級方程式七冠王路易斯漢米爾頓爵士獲BBC殊榮;
Injured bald eagle rescued by two children and firefighters in United States
兩孩童和消防員出手營救美國的受傷白頭鷹。
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https://www.youtube.com/watch?v=KTGiQUsNymk