Statistics on energy production are fairly reliable; accurate statistics on energy consumption by major industry categories are relatively difficult to obtain; data on energy consumption in the production of specific goods is even more unreliable. The environmental costs we pay for owning and using all products include such a portion of the energy hidden in the commodity.
The valuation of the implied energy of industrial manufactured goods is not only based on the fact that the steel used in large quantities in cars, the countless microchips in computers, but also the inevitable in order to derive the overall value. Simplification and assumptions. Which model of car? Which computer or phone? The challenge we face is to pick reasonable and representative values; the reward is to come up with a new perspective on the artificial world.
Let's focus on mobile devices and cars. Mobile devices are chosen because they are the main drivers of instant messaging and unlimited information; cars are chosen because people want to move as they wish in the real world.
Obviously, a 1.4-tonne car (such as the Honda Accord LX) has more energy than a 140-gram smartphone (such as Samsung Gallo). But the energy difference is far less than the difference of 10,000 times their weight.
In 2015, global mobile phone sales reached 1.9 billion units, notebook sales totaled approximately 60 million units, and tablet sales exceeded 230 million units. The total weight of these equipment is 550,000 tons. Let us make a cautious assumption that the average hidden power per mobile phone is 250 million joules, the hidden energy of each laptop is 4.5 billion joules, and the hidden energy of each tablet is 1 billion joules, then each year The production of these devices requires approximately 1 EJ (ie 1018 joules) of primary energy. The primary energy consumption required to produce each car is about 100 billion joules. In 2015, the global sales of 72 million cars will have an energy of about 7 yokes and a total weight of 100 million tons. So the weight of the new car is more than 180 times the weight of all portable electronic devices, but the energy required for manufacturing is only seven times that of the latter.
Perhaps unbelievable, we can make a more amazing comparison. The lifespan of portable electronic devices is not long—on average, only two years—so the implied energy used in these products produced annually is about 0.5 Ajoule. Since the car generally has a service life of at least 10 years, the implied energy used in cars produced every year in the world is about 0.7 Ajoule - only 40% more! This means that even if the rough total is the opposite of the wrong outcome (the car's implicit energy should be more, and the electronic equipment should be less), the global total of the implied energy will still be on the same order of magnitude. Up, and it is very likely that the difference is within two times.
Of course, the operating energy costs of the two are quite different. A compact American sedan consumes about 500 billion joules of gasoline during its 10-year service, five times the hidden energy cost. A smartphone consumes only 4 kWh of electricity during its two-year service period, less than 30 megajoules; if it comes from wind turbines or photovoltaic cells, it consumes only its hidden energy costs. %; if it is using less efficient coal-fired power generation, then this ratio will rise to 8%.
However, if a smartphone does not have a network, it becomes an insufficiency, and the cost of developing a network is very high and continues to rise. In 2013, the US data center consumed approximately 91 billion kWh of electricity (2.2% of total power generation) and plans to increase it to 3.5% by 2020. It is reported that in 2012, the energy demand of information and communication networks worldwide accounted for 5% of electricity output, and will be close to 10% by 2020. In general, those tiny smart phones have left a lot of energy on the energy budget – as well as the environment.
CIXI LANGUANG PHOTOELECTRIC TECHNOLOGY CO..LTD , https://www.cxblueray.com