scholarly journals Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons

2020 ◽  
Author(s):  
Pallav Purohit ◽  
Lena Höglund-Isaksson ◽  
John Dulac ◽  
Nihar Shah ◽  
Max Wei ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Air Conditioning ◽  
Greenhouse Gas Emission ◽  
Ghg Emissions ◽  
Electricity Consumption ◽  
Air Pollutant ◽  
Montreal Protocol ◽  
Pollutant Emissions ◽  
Strong Increase ◽  
Improve Energy Efficiency

Abstract. Hydrofluorocarbons (HFCs) are widely used as cooling agents in refrigeration and air conditioning, as solvents in industrial processes, as fire extinguishing agents, for foam blowing and as aerosol propellants. They have been the primary substitutes for ozone-depleting substances regulated under the Montreal Protocol (MP). However, HFCs are potent greenhouse gases (GHGs) and as such subject to global phase-down under the Kigali Amendment (KA) to the MP. In this study, we develop a range of long-term scenarios for HFC emissions under varying degrees of stringency in climate policy and assess co-benefits in the form of electricity savings and associated reductions in GHG and air pollutant emissions. Due to technical opportunities to improve energy efficiency in cooling technologies during the phase-down of HFCs, there exist potentials for significant electricity savings under a well-managed phase-down of HFCs. Our results show that annual pre-KA baseline emissions of HFCs are expected to increase from almost 0.5 to about 4.3 Gt CO2eq between 2005 and 2050 and reach between 6.2 and 6.8 Gt CO2eq in 2100. The growth is driven by a strong increase in demand for refrigeration and air conditioning services, which in turn is driven by an expected increase in per capita wealth in developing countries and a warmer future climate. We estimate that full compliance with KA means cumulative global HFC emissions that are 87 % lower than in the pre-KA baseline between 2018 and 2100. Also, the opportunity to simultaneously improve energy efficiency in stationary cooling technologies during such a transition could bring about additional climate benefits of about the same magnitude as that attributed to the phase-down of HFCs. If technical energy efficiency improvements are fully implemented, the resulting electricity savings could exceed a fifth of future global electricity consumption. Together with an HFC phase-down, this means preventing between 390 and 640 Gt CO2 equivalent of GHG emissions between 2018 and 2100, thereby making a significant contribution towards keeping the global temperature rise below 2 °C. Reduced electricity consumption also means lower air pollution emissions in the power sector, estimated at about 10 % for SO2, 16 % for NOx and 9 % for PM2.5 emissions, compared with a pre-KA baseline.

scholarly journals Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons

2020 ◽  
Vol 20 (19) ◽  
pp. 11305-11327
Author(s):  
Pallav Purohit ◽  
Lena Höglund-Isaksson ◽  
John Dulac ◽  
Nihar Shah ◽  
Max Wei ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Greenhouse Gas Emission ◽  
Fine Particulate Matter ◽  
Ghg Emissions ◽  
Electricity Consumption ◽  
Air Pollutant ◽  
Montreal Protocol ◽  
Pollutant Emissions ◽  
Improve Energy Efficiency ◽  
Energy Efficiency Improvement

Abstract. Hydrofluorocarbons (HFCs) are widely used as cooling agents in refrigeration and air conditioning, as solvents in industrial processes, as fire-extinguishing agents, for foam blowing, and as aerosol propellants. They have been used in large quantities as the primary substitutes for ozone-depleting substances regulated under the Montreal Protocol. However, many HFCs are potent greenhouse gases (GHGs) and as such subject to global phase-down under the Kigali Amendment (KA) to the Montreal Protocol. In this study, we develop a range of long-term scenarios for HFC emissions under varying degrees of stringency in climate policy and assess co-benefits in the form of electricity savings and associated reductions in GHG and air pollutant emissions. Due to technical opportunities to improve energy efficiency in cooling technologies, there exist potentials for significant electricity savings under a well-managed phase-down of HFCs. Our results reveal that the opportunity to simultaneously improve energy efficiency in stationary cooling technologies could bring additional climate benefits of about the same magnitude as that attributed to the HFCs phase-down. If technical energy efficiency improvements are fully implemented, the resulting electricity savings could exceed 20 % of future global electricity consumption, while the corresponding figure for economic energy efficiency improvements would be about 15 %. The combined effect of HFC phase-down, energy efficiency improvement of the stationary cooling technologies, and future changes in the electricity generation fuel mix would prevent between 411 and 631 Pg CO2 equivalent of GHG emissions between 2018 and 2100, thereby making a significant contribution towards keeping the global temperature rise below 2 ∘C. Reduced electricity consumption also means lower air pollution emissions in the power sector, estimated at about 5 %–10 % for sulfur dioxide (SO2), 8 %–16 % for nitrogen oxides (NOx), and 4 %–9 % for fine particulate matter (PM2.5) emissions compared with a pre-Kigali baseline.

scholarly journals EFFICIENCY INCREASE IN THE ENERGY SAVING PROGRAM IN RUSSIA

2021 ◽  
pp. 133-143
Author(s):  
Анатолий Петрович Дзюба
Keyword(s):  
Energy Efficiency ◽  
Electricity Consumption ◽  
Russian Regions ◽  
Total Contribution ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Russian Economy ◽  
Regional Group ◽  
Efficiency Increase ◽  
Federal Districts

Цель статьи - представить разработанную автором методику ранжирования регионов России по уровню общего вклада в реализацию комплекса мер в энергосбережение и повышение энергетической эффективности экономики России. Автором проведено эмпирическое исследование промежуточных результатов реализации мер по повышению энергетической эффективности в России за период 2010-2019 гг. Выполнено исследование направления и динамики изменения потребления электроэнергии за исследуемый период на уровне федеральных округов и регионов России. Научная новизна заключается в выполнении ранжирования регионов, либо территориальных образований по уровню общего вклада каждого региона на основе разработанных показателей. Такое ранжирование выполнено и относительно роста спроса и общего вклада регионов в электропотребление на уровне общего экономического пространства. На основе полученных результатов автором проведена группировка регионов с целью предоставления рекомендаций для каждой региональной группы, направленных на повышение энергетической эффективности в масштабах экономики России. The article is devoted to the description of the methodology developed by the author for ranking Russian regions according to the level of total contribution to the implementation of a set of measures in energy conservation and increasing the energy efficiency of the Russian economy. The author conducts an empirical study of the intermediate results of the implementation of measures to increase energy efficiency in Russia for the period 2010-2019. The study analyzes the direction and dynamics of changes in electricity consumption for the period under study at the level of federal districts and regions of Russia. On the basis of the ranking results obtained, the author has grouped the regions with recommendations for each regional group according to the need to improve energy efficiency on the scale of the Russian economy.

scholarly journals The Numerical Simulation of the Airflow Distribution and Energy Efficiency in Data Centers with Three Types of Aisle Layout

2019 ◽  
Vol 11 (18) ◽  
pp. 4937 ◽  
Author(s):  
Jing Ni ◽  
Bowen Jin ◽  
Shanglei Ning ◽  
Xiaowei Wang
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Air Conditioning ◽  
Data Centers ◽  
Simulation Method ◽  
Cooling Capacity ◽  
Energy Utilization ◽  
Improve Energy Efficiency ◽  
Electricity Cost ◽  
Airflow Distribution

The energy consumption of fast-growing data centers is drawing attentions from not only energy organizations and institutions all over the world, but also charity groups, such as Greenpeace, and research shows that the power consumption of air conditioning makes up a large proportion of the electricity cost in data centers. Therefore, more detailed investigations of air conditioning power consumption are warranted. Three types of airflow distributions with different aisle layouts (the open aisle, the closed cold aisle, and the closed hot aisle) were investigated with Computational Fluid Dynamics (CFD) methods in a typical data center of four rows of racks in this study. To evaluate the results of thermal and bypass phenomenon, the temperature increase index (β) and the energy utilization index (ηr) were used. The simulations show that there is a better trend of the β index and ηr index both closed cold aisle and closed hot aisle compared with free open aisle. Especially with high air flow rate, the β index decreases and the ηr index increases considerably. Moreover, the results prove the closed aisles (both closed cold aisle and closed hot aisle) can not only significantly improve the airflow distribution, but also reduce the mixture of cold and heat flow, and therefore improve energy efficiency. In addition, it proves the design of the closed aisles can meet the increasing density of installations and our simulation method could evaluate the cooling capacity easily.

scholarly journals The Efficiency of Economic Performance, Electricity Consumption, and Environmental Pollutants in Taiwan

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Wen-jie Zou ◽  
Tai-Yu Lin ◽  
Yung-ho Chiu ◽  
Ting Teng ◽  
Kuei Ying Huang
Keyword(s):  
Air Pollution ◽  
Economic Development ◽  
Air Pollutants ◽  
Electricity Consumption ◽  
Living Environment ◽  
Air Pollutant ◽  
Disposable Income ◽  
Pollutant Emissions ◽  
Motor Vehicles ◽  
Overall Efficiency

Finding the balance between economic development and environmental protection is a major problem for many countries around the world. Air pollution caused by economic growth has caused serious damage to humans’ living environment, and as improving energy and resource efficiencies is the first priority, many countries are targeting to move towards a sustainable environment and economic development. This study uses the modified dynamic SBM (slack-based measure) model to explore the economic efficiency and air pollutants emission efficiency in Taiwan’s counties and cities from 2012 to 2015 by taking labor, motor vehicles, and electricity consumption as inputs and average disposable income as output. Particulate matter (PM2.5), nitrogen oxide emissions (NO2), and sulfur oxide emissions (SO2) are undesirable outputs, whereas factory fixed assets are a carry-over variable, and the results show the following: (1) the regions with the best overall efficiency between 2012 and 2015 include Taipei City, Keelung City, Hsinchu City, Chiayi City, and Taitung County; (2) in counties and cities with poor overall efficiency performance, the average disposable income per household has no significant relationship with air pollutant emissions; (3) in counties and cities where overall efficiency is poor, the average efficiency of each household’s disposable income is small; and (4) except for the five counties and cities with the best overall performance, the three air pollutants in the other fourteen counties and cities are high. Overall, the air pollution of most areas needs improvement.

Systematic Evaluation of a Multi-Lane Green-Driving Algorithm in a Mixed Connected Environment

2020 ◽  
pp. 036119812095932
Author(s):  
Hao Yang ◽  
Kentaro Oguchi
Keyword(s):  
Energy Efficiency ◽  
Research Effort ◽  
Air Pollutant ◽  
Pollutant Emissions ◽  
Systematic Evaluation ◽  
Connected Vehicles ◽  
Extended System ◽  
Systematic Analysis ◽  
Effective Strategies ◽  
Traffic Oscillations

Vehicles traveling under oscillated traffic have low energy efficiency and high air pollutant emissions. Green driving with the help of connected vehicles (CVs) attracts a lot of research effort to improve vehicle energy efficiency. However, it is very challenging to perform green driving on multi-lane freeways under a mixed connected environment. In the researchers’ previous work, one innovative green-driving algorithm was proposed to solve the multi-lane problem with only one CV. In this study, a systematic analysis of the algorithm is conducted to understand its benefits and limitations on smoothing traffic oscillations. The effect of the steady states and the number of lanes is also analyzed. In addition, the algorithm is extended to a more general scenario with multiple CVs. The extended system coordinates multiple CVs to form multiple moving bottlenecks to mitigate traffic oscillation more efficiently as well as providing more realistic instructions to CVs. The evaluation of the extended system concludes with the most effective strategies to control CVs to smooth oscillations.

Life Cycle Analysis of Emissions from Electric and Gasoline Vehicles in Different Regions

2017 ◽  
Vol 11 (4) ◽  
pp. 572-582 ◽  
Author(s):  
Kamila Romejko ◽  
◽  
Masaru Nakano
Keyword(s):  
Air Pollution ◽  
Life Cycle ◽  
Life Cycle Analysis ◽  
Ghg Emissions ◽  
Resource Depletion ◽  
Clean Energy ◽  
Life Cycles ◽  
Air Pollutant ◽  
Pollutant Emissions ◽  
Gasoline Vehicles

Electric vehicles (EVs) are considered a promising technology to mitigate air pollution and resource depletion problems. The emissions from the manufacturing process can cause severe health problems like chronic asthma and even death. Automakers and policy makers need to investigate the lifecycle emissions of EVs in different regions and then governments should decide if it is safe to establish EV production facilities in their country or whether it is more appropriate to import finished products. The objective of this study is to evaluate the air pollutant emissions produced by EVs and gasoline vehicles (GVs) during their life cycles under two technology scenarios. Life cycle analysis (LCA) was applied to quantify greenhouse gas (GHG) and non-GHG emissions. We assessed air pollution from vehicles in Japan, China, and the United Kingdom (UK). Results indicate that EVs do not necessarily decrease pollutant emissions. EVs can improve air quality and reduce emissions in countries where electricity is derived from clean energy resources.

scholarly journals Will the Management Structure of Energy Administrators Affect the Achievement of the Electrical Efficiency Mandatory Target for Taiwan Factories?

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 2021
Author(s):  
Feng-Fan Liao ◽  
Wun-Hwa Chen
Keyword(s):  
Energy Efficiency ◽  
New Technologies ◽  
Electricity Consumption ◽  
Industrial Sector ◽  
Point Of View ◽  
Management Structure ◽  
Electrical Efficiency ◽  
Improve Energy Efficiency ◽  
Industrial Energy ◽  
Electricity Saving

Since 2014, Taiwan has promoted a 1% annual electricity saving target to promote electrical efficiency efforts. As the industrial sector accounts for approximately 60% of the overall electricity consumption of Taiwan, this sector presents the greatest opportunity for improving Taiwan’s overall energy efficiency. Here, the energy audit data of industrial energy users are analyzed via logistic regression to understand the factors impacting their likelihood of achieving the targeted 1% electricity saving. Of the variables under study, the number of employees and the rank of the energy administrator were significantly correlated with the likelihood of reaching the electricity saving target. Within the management structure of the factory, energy users with higher-ranking energy administrators are more likely to achieve the targeted 1% electricity saving. As it is impractical to rapidly increase the number of employees, higher-ranking employees, i.e., factory executives, should be appointed as energy administrators to improve users’ electrical efficiency and thus reach the targeted 1% annual electricity saving. Based on the findings of our research, we put forward a point of view that in addition to the introduction of new technologies to improve energy efficiency, it can also be achieved through adjustments to the management structure of energy administration.

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