World Energy 2030 projection: reminders for dreamers

[Remundo]

The World Energy Outlook 2016 ...

The energy transition in motion ... very slowly: annual emissions of CO2 still rising



details in Ad sycomoréenne of 21 / 11 / 2016

[moinsdewatt]

Air conditioning, an energy chasm for the whole planet?

GN, the 16 / 05 / 2018

ANTICIPATION. The International Energy Agency (IEA) is concerned about the explosion in air conditioning needs on a planetary scale. For lack of improvement in their energy performance, the world could face a "cold crack" in 2050 ...

The climate is heating up, the challenge of cooling buildings is therefore major ... and potentially the source of a vicious circle. Because the number of air conditioners in the world could go from 1,6 billion today, to 5,6 billion in 2050, 10 air conditioners sold per second for 30 years! Machines that will require resources to be produced and then consume electricity to operate. So much so that their needs will simply be the main driver of electricity demand over the next three decades, and to power them will require production capacity equivalent to that of the United States, the European Union and the United States. Japan united.

A trend that therefore appears difficult to sustain and in total contradiction with the imperatives of sobriety and reduction in consumption. To date, air conditioners and fans already installed in the world use 1 / 5th of the energy of buildings, or 10% of the world's electricity. And their generalization in emerging countries, located in the intertropical zone like India, should logically lead to the dramatic increase already mentioned. For now, only 8% of the 2,8 billion people living in the hottest areas of the globe have access to air conditioning, where this proportion is 90% in the United States or Japan. Widespread access to air conditioning "will have a significant impact on the overall energy demand of the countries concerned, putting pressure on electricity grids and increasing local and global [greenhouse gas] emissions," warns the International Energy Agency.

improve building insulation or equipment efficiency?


But how to avoid the predicted disaster and the absurd situation where it will be necessary to build additional power stations in order to supply cold units which will deteriorate the global carbon footprint? First of all by drastically improving the efficiency of air conditioning systems, estimates the IEA, which recalls that the models distributed in Europe or Japan are on average 25% more efficient than those sold in China and the United States. Fatih Birol, the executive director of the Agency, sums up: "Although they provide additional comfort and improve everyday life, it is essential that the energy performance of air conditioners becomes a priority. The standards required by the majority of these new groups are lower than they should be ". The adoption of more restrictive regulations could, according to IEA calculations, lead to halving the future electrical requirements of all systems. Hence the urgent idea of ​​imposing proactive policies to control the performance of machines placed on the market and to label the best solutions. The agency notes: "Improving the efficiency of cooling will bring multiple other benefits, such as making it more affordable, safer and more sustainable." The hoped-for savings on fuel consumption and operational costs could approach 2.500 billion euros!

In France, air conditioning is still confidential in housing, but the situation could change. Alain Maugard, President of Qualibat, explained at the end of 2017: "Today, air conditioning is everywhere: in transport, offices, cars, cinemas ... except in people's homes!". An absence that would therefore be less and less accepted by users, accustomed to a certain level of comfort. The answer - for now - lies in the increased insulation of buildings so that they retain maximum freshness inside. "In very hot periods, which are more and more frequent, it is very good to have thermal inertia in the building. But it is very good for a few days only. Because if the strong heat lasts for a week, inertia works in the opposite direction: the heat island sets in and this creates discomfort for the user, "he continued. Hence the idea of ​​coupling air conditioners to renewable energy sources, in particular solar photovoltaic. When the cooling needs would be the most intense, the electricity production would also be maximum. A common sense solution but which would be more relevant in the southern regions of France and overseas. The members of the Equilibre des energies (EdEn) association, for their part, advance the idea of ​​installing reversible heat pumps which, instead of capturing calories in the outside air to transport them inside as in winter, would do exactly the opposite by extracting these calories from the habitat and throwing them out. These are all avenues that manufacturers will need to quickly explore in order to offer lasting and sustainable solutions, compatible with the objectives of the Paris Climate Agreement.

https://www.batiactu.com/edito/climatis ... -52958.php

[Ahmed]

The agency notes: "Improving cooling efficiency will bring many other benefits, like making it more affordable, safer and more durable ".

It is me who underlines: beautiful rebound effect in perspective!

[moinsdewatt]

The agency notes: "Improving cooling efficiency will bring many other benefits, like making it more affordable, safer and more durable ".

It is me who underlines: beautiful rebound effect in perspective!

Alas, yes, I thought of the same thing while reading.

[Petrus]

Members of the association Equilibre des Energies (EdEn) advance, for their part, the idea of ​​installing reversible heat pumps that, instead of capturing calories in the outside air to route them inside as in winter, would do the exact opposite by extracting these calories from the habitat to reject them out. As many tracks as industrialists will quickly explore in order to propose sustainable and sustainable solutions, consistent with the objectives of the Paris Agreement on climate.

??
Great idea, it's just the principle of air conditioning, there are some who have never had to see the hot part of their air conditioning.

[Ahmed]

Where are these people coming from?
Really an idea worthy of shadocks: we pump in one direction, then in the other, without asking the question of leaks ...

[Remundo]

reversible air conditioning has been around for ages.

Few people know that a heat pump and a refrigerator are technically very close; just play on the hot spring and the cold source to have one or the other.

@+

[Ahmed]

reversible air conditioning has been around for ages.

that was the meaning of my question: "Where are these people coming from?? "

[Petrus]

After taking a look at their site, it is a lobby that defends the all-electric under the pretext of reducing CO2 emissions: https://www.equilibredesenergies.org/01 ... lacer-parc
My greenwashing-o-meter has gone into the red zone by visiting it.

[moinsdewatt]

When data storage will consume more energy than the world produces ...

MYRTILLE DELAMARCHE Factory New 29 / 06 / 2018

There is an urgent need to reduce the energy consumption of storing our data, alerted Eric Fullerton, professor at UC San Diego, and Reinhold Dauskardt, professor at Stanford, on June 29 in Nancy, at the close of World Materials. Forum. Five figures and two dates to remember about big data.

15 zettabits

This is the amount of data stored around the world in 2017. Hard to make this huge figure speak. It corresponds to 10E21 bits, or 480 terabits processed every second of the year. This big data, which has never been so well named, is recorded magnetically, mainly on hard disks.

90 billion kWh

This is the annual energy consumption of American data centers. This corresponds to 34 giant power plants (500 MW). Google has an energy intensity roughly equivalent to that of the city of San Francisco.

3%

This is the share of global electricity consumed by data centers in 2017. These terabyte 416 are 40% higher than the consumption of a country like the United Kingdom.

4

This overall consumption of data centers doubles on average every four years.

29 kg

This is the weight weighed by the first hard drive whose capacity exceeded one gigabit. It was 1981, and it was worth $ 100. Today, a gigabit of storage is worth around $ 000. "But progress is slowing down as technology confronts the limits of physics," warns Eric Fullerton.

2002

This is the year the world has become digital. More exactly, this is the year when digital data storage has exceeded, in proportion, analog storage.

2037

By this time, if nothing changes, computers will consume more electricity than the world will produce. The challenge for the next 20 years is to reduce this footprint, by designing objects that are certainly connected to the Internet, but not to the electricity network. The latter must be sober, autonomous and "use all conceivable energy sources: vibrations, heat, light, etc." concludes Reinhold Dauskardt.

https://www.usinenouvelle.com/article/w ... it.N714019