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関連する概念動画

Production Efficiency01:01

Production Efficiency

17.0K
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
17.0K
Energy Losses in Transformers01:21

Energy Losses in Transformers

937
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the...
937
P-N junction01:11

P-N junction

620
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
620
Quantifying Work02:30

Quantifying Work

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As a system undergoes a change, its internal energy can change, and energy can be transferred from the system to the surroundings, or from the surroundings to the system. 
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Energy Budgets00:51

Energy Budgets

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Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
9.6K
Calculation of Electric Flux01:25

Calculation of Electric Flux

1.9K
Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
1.9K

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関連する実験動画

Updated: Aug 24, 2025

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

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世界的な太陽光発電のサプライチェーンのコスト削減の量化

John Paul Helveston1, Gang He2, Michael R Davidson3,4

  • 1Department of Engineering Management and Systems Engineering, George Washington University, Washington DC, USA.

Nature
|October 26, 2022
PubMed
まとめ

グローバル化された太陽光発電 (PV) サプライチェーンにより,世界中の太陽光発電のインストーラがコストを大幅に削減しました. このグローバリゼーションを維持することは 将来のソーラーモジュール価格と カーボンニュートラリティの目標の達成に不可欠です

さらに関連する動画

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells
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In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

Published on: October 3, 2018

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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

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関連する実験動画

Last Updated: Aug 24, 2025

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
07:08

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

Published on: June 12, 2019

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In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells
09:19

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

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科学分野:

  • 再生可能エネルギー経済
  • サプライチェーン管理
  • 気候政策

背景:

  • カーボンニュートラリティを達成するには 急速な再生可能エネルギーの導入が必要です
  • 国家の政策は 時には世界的な資本,人材,イノベーションの流れを阻害し,コストを増加させます
  • 地元的な利益が グローバルな経済効率よりも優先されます

研究 の 目的:

  • グローバル化された太陽光発電 (PV) モジュールサプライチェーンのコスト削減を評価する.
  • 米国,ドイツ,中国の経済利益を定量化するために.
  • 異なるサプライチェーンのシナリオの下での太陽光モジュール価格への将来の影響を予測する.

主な方法:

  • 2つの要素による学習モデルの開発
  • 太陽光発電の容量,部品価格,材料コストに関する過去のデータの活用
  • 米国,ドイツ,中国 (2008-2020年) の配備データ分析

主要な成果:

  • グローバル化されたPVモジュール市場は,米国のインストーラに240億ドル,ドイツのインストーラに70億ドル,中国のインストーラに360億ドル (2008-2020年) を節約しました.
  • 国内を中心としたシナリオと比較して,グローバリゼーションは実質的なコスト削減をもたらしました.
  • グローバル化されたサプライチェーンは2030年までにモジュールの価格を 20~25%下げると見込まれています

結論:

  • グローバル化された太陽光発電の価値連鎖は 重要な経済的利益をもたらし 国際的な気候政策を支援しています
  • 再生可能エネルギーのグローバル化を推進する政策は 費用対効果の高い炭素中立性にとって不可欠です
  • 福祉の分配と技術的排斥効果に対処するために 補完的な政策が必要です