Tags: electric | jets | airplanes | carbon

Do We Need Electric Powered Jets?

Do We Need Electric Powered Jets?
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Wednesday, 04 December 2019 01:05 PM Current | Bio | Archive

First let’s stop this eliminate-carbon-use craze.

Carbon is an indestructible atom. It may be part of different molecules, such as CO2, but without it life would disappear on earth. There still are the same numbers of carbon atoms on earth as there were one million years ago. Co2 is an inert gas and not a poison, as the Obama administration told us. We exhale this gas with every breath we take after being combined in our bodies with oxygen (which we inhale) to heat our body and to produce our needed energy. This process is shared with most large animals. Trees and all green-leafed plants need carbon to grow. Without it they would die.

Carbon is the essential atom in the fuel we burn; may it be wood, coal, gas, or oil. About 80% of all our energy needs depend on it.

The latest, well meaning idea, is to use electricity to fly airplanes; not realizing that the overall energy requirement to do this is at least 23 % higher than when using liquid fuel. This is due in part to the extra weight of the batteries.

Let’s look at the energy requirements of an electric powered jet:

Efficiency of the electric power plants (42% efficient), batteries (65% efficient), and electric motors (95% efficient). Combined, we have 0.42% x 65% x 95% = 25.9 % net available for flight power. This compares with 40% flight power output of a fuel driven efficient jet engine. Here, we propose to expend almost 100%-25.9% of total available input energy on land in order to save 100%-40% in the air, meaning we waste 23% of available energy when flying electric jets, even ignoring the extra weight factor of the many required batteries. Such a deal would only make sense if power would come from atomic energy where no fuel is burned.

One might say, an electric powered jet expels no CO2 gases in the upper atmosphere. That is true, However doing so, we expel 23% more Co2 through the chimney of an electric power plant than we would have done with fuel powered jets.

We use the same illogic reasoning to replace fuel powered cars with electric cars, even though a typical electric car uses about 20% more available energy in order to drive one mile then is used by a fuel powered car.

Energy conversion to mechanical power is akin to commerce, where is cheaper to buy from the producer directly rather than through a middle man. Here the middle man is the battery.

Where is logic and common sense?

Saving overall energy consumption is a laudable goal and can be achieved by improving the efficiency of mechanical devices and by using a more restrained life style. However, no matter what we try, we still need carbon.

Dr. Baumann, a former Corporate Vice President and founder of his company, is a well known inventor, economist, and author having published books on scientific, economic, and historical subjects. He is a member of the American Research Society and an Inductee of the Hall of Fame of Automatic Control, besides also being an honorary member of a number of technical societies. For more of his reports, Go Here Now.

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HansBaumann
First let’s stop this eliminate-carbon-use craze.
electric, jets, airplanes, carbon
538
2019-05-04
Wednesday, 04 December 2019 01:05 PM
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