Listen to Gry Johanne Åmodt present Statkraft’s low emission scenario, explaining how renewables can cut most of global greenhouse gas emissions in the coming years. Gry Johanne Åmodt is heading the Global Drivers unit in Statkraft, Europe’s largest renewable energy producer. Her job is to analyze and monitor the forces driving the renewable energy markets. Gry has been working at Statkraft since 2004 and has a Master’s degree in Industrial Economics from Norwegian University of Science and Technology (NTNU). This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
Environmental conservation and the transition to eco-friendly products have been touted as the main solution to the looming global warming crisis. CNBC Africa’s Loise Wachira caught up with energy experts who attended a recent UN convention in Nairobi.
SOLAR ENERGY – 5 REASONS why it won’t solve Global Warming [2019]
Why we NEED to rethink SOLAR ENERGY – About two years ago Elon Musk made a claimed that the number of solar panels that we would need was a blue square on a map.
There was no further information as to the area that he was referring to, so in this video I will show and how that is not possible by extrapolating things a little bit.
Slowly we are realizing that Solar can only contribute to a small part of what we need to achieve in the near future.
Here is the what we have to consider, and it will always be a problem. Solar panels are dependent on weather. Depending on where you are located on earth, the amount of sunlight available will differ, but what most people don’t know is that the solar energy available is actually less than sunlight hours.
This means that even though at the equator you would have about 16 hours of sunlight at the best time of the year, the actual hours that can be used with the Solar Panels is a bit less, or about 12 hours. (Need to verify this)
And the further away from the equator line you go in terms of latitude, the less Sun energy you will have available.
So, what does this translates to?
The best solar panels you can buy today has an optimal sunlight conversion in between 20% to 30% at best. To make calculations easier, we will use the 250 watts output.
The power per area unit of the sun is about 1kW/m2, but that varies through the year.
We can draw the solar panel efficiency throughout the day like this.
• Chart with solar panel efficiency throughout the day Rotating earth
• Next slide, solar panel angle
Next, what we have to consider is that for the panel to drawn the most energy possible, or to be the most efficient, the panel has to always be perpendicular to the sun however, in normal households, by putting panels on the roof tops, that is not viable, so in most houses the panels will never be flat facing the sun at all times.
Since most houses do not possess flat rooftops, you know what that means. The efficient drops throughout the day, which is ranges in between 5% and 15%.
As you can see, the solar panel will not be converting 250 watts all the time and at winter times, it drops significantly.
And all of this is to provide energy for you, only during the day if you don’t have any batteries to store the energy. Even if you buy a tesla power wall, the maximum number of hours that you will have available is about maybe 8 hours at best with one of them.
Yes, this is good for anyone going off-grid, but as you will see next, houses are only a tiny part of the problem.
NOTE: The animations in my videos take a substantial amount of time to make, so please be patient. I am trying to get a video per week, but some times it takes longer.
This talk was given at a local TEDx event, produced independently of the TED Conferences. The talk is about the leadership change that is required to maximize the potential for energy efficiency within in our society.
Stijn Santen holds an MSc in chemistry and chemical engineering at the University of Amsterdam and has worked for 18 years in Shell lately as global business manager CO2 before starting his company CO2-Net B.V. in 2005. He is the architect of the first commercially successful CO2 pipeline projects; Shell-Omya (1998) and Shell-OCAP (2005), where the latter is one the largest energy efficiency projects implemented in the Netherlands. He acted as visiting professor at the Oil & Gas University of General Electric in Firenze, Italy in 2005 and 2006 teaching energy markets, energy policies and climate change and published his vision on innovation in “Managing technology and innovation” by Routledge Publishers. From 2006 till 2009 he developed and implemented the 50 % CO2 reduction strategy for Rotterdam leading to the development of the Rotterdam Climate Initiative. From 2009 till 2011 he was partner in the European program CO2Europipe on CO2 transport networks. In 2012 he led the EU CO2 transport working group in the European Zero Emission Platform ZEP together with National Grid.
Currently, he is leading a project on dialogue and decision making in the Dutch energy transition with stakeholders in energy companies, governments and research institutes for the Netherlands in the EU project R&Dialogue.
About TEDx, x = independently organized event In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations) Video Rating: / 5
![SOLAR ENERGY - 5 REASONS why it won’t solve Global Warming [2019]](https://i.ytimg.com/vi/ATFardT71Rs/default.jpg)
