scholarly journals Experimental comparison between R134a/R744 and R438A/R744 (drop‐in) cascade refrigeration systems based on energy consumption and greenhouse gases emissions

2021 ◽  
Author(s):  
Marcus Vinícius Almeida Queiroz ◽  
Frank William Adolfo Blanco Ojeda ◽  
Muhammad Amjad ◽  
Fahid Riaz ◽  
Chaudhary Awais Salman ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Greenhouse Gases ◽  
Experimental Comparison ◽  
Greenhouse Gases Emissions ◽  
Cascade Refrigeration

scholarly journals Energy consumption and greenhouse gases emissions on relation Brno - Jihlava

2018 ◽  
Vol 235 ◽  
pp. 00011 ◽  
Author(s):  
Vladimír Ľupták ◽  
Martina Hlatká ◽  
Rudolf Kampf
Keyword(s):  
Global Warming ◽  
Energy Consumption ◽  
Greenhouse Gases ◽  
Emission Intensity ◽  
Energy Intensity ◽  
Rail Transport ◽  
Passenger Rail ◽  
Greenhouse Gases Emissions

Currently, the influence of transport on the environment represents a serious problem, especially in terms of energy consumption and generation of gases causing global warming. The contribution on the topic of comparing energy consumption and greenhouse gases emissions on relation Brno – Jihlava thus aims to describe generation of emissions in the current types of transport and their calculation according to EN 16258:2012. The results of the calculations will be expressed in emission intensity units to the number of passengers transported. The EN 16258:2012 calculations will be applied to passenger rail transport. In particular, energy intensity and generation of greenhouse gases will be monitored in relation to travelling the distance between Brno and Jihlava.

Evaluation the effect of the ambient temperature on the liquid petroleum gas transportation pipeline

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ammar Ali Abd ◽  
Samah Zaki Naji ◽  
Ching Thian Tye ◽  
Mohd Roslee Othman
Keyword(s):  
Energy Consumption ◽  
Greenhouse Gases ◽  
Ambient Temperature ◽  
Phase Change ◽  
Liquid State ◽  
Pump Energy ◽  
Compressible Liquid ◽  
Liquefied Petroleum Gas ◽  
Efficient Design ◽  
The Impact

Abstract Liquefied petroleum gas (LPG) plays a major role in worldwide energy consumption as a clean source of energy with low greenhouse gases emission. LPG transportation is exhibited through networks of pipelines, maritime, and tracks. LPG transmission using pipeline is environmentally friendly owing to the low greenhouse gases emission and low energy requirements. This work is a comprehensive evaluation of transportation petroleum gas in liquid state and compressible liquid state concerning LPG density, temperature and pressure, flow velocity, and pump energy consumption under the impact of different ambient temperatures. Inevitably, the pipeline surface exchanges heat between LPG and surrounding soil owing to the temperature difference and change in elevation. To prevent phase change, it is important to pay attention for several parameters such as ambient temperature, thermal conductivity of pipeline materials, soil type, and change in elevation for safe, reliable, and economic transportation. Transporting LPG at high pressure requests smaller pipeline size and consumes less energy for pumps due to its higher density. Also, LPG transportation under moderate or low pressure is more likely exposed to phase change, thus more thermal insulation and pressure boosting stations required to maintain the phase envelope. The models developed in this work aim to advance the existing knowledge and serve as a guide for efficient design by underling the importance of the mentioned parameters.

scholarly journals Greenhouse gases emissions in rivers of the Tibetan Plateau

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Bin Qu ◽  
Kelly Sue Aho ◽  
Chaoliu Li ◽  
Shichang Kang ◽  
Mika Sillanpää ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Greenhouse Gases ◽  
The Tibetan Plateau ◽  
Greenhouse Gases Emissions

Greenhouse gases emissions in liquified natural gas as a marine fuel: Life cycle analysis and reduction potential

2021 ◽  
Author(s):  
Ahmad Al‐Douri ◽  
Abdulrahman S. Alsuhaibani ◽  
Margaux Moore ◽  
Rasmus Bach Nielsen ◽  
Amro A. El‐Baz ◽  
...  
Keyword(s):  
Life Cycle ◽  
Natural Gas ◽  
Greenhouse Gases ◽  
Life Cycle Analysis ◽  
Reduction Potential ◽  
Marine Fuel ◽  
Greenhouse Gases Emissions

scholarly journals An overview of greenhouse gases emissions in Hungary

2021 ◽  
pp. 127865
Author(s):  
Safwan Mohammed ◽  
Abid Rashid Gill ◽  
Karam Alsafadi ◽  
Omar Hijazi ◽  
Krishna Kumar Yadav ◽  
...  
Keyword(s):  
Greenhouse Gases ◽  
Greenhouse Gases Emissions

Future changes in Beijing haze events under different shared socioeconomic pathways

2021 ◽  
Author(s):  
Liang Guo ◽  
Laura Wilcox ◽  
Massimo Bollasina ◽  
Steven Turnock ◽  
Marianne Lund ◽  
...  
Keyword(s):  
Air Pollution ◽  
Global Warming ◽  
Greenhouse Gases ◽  
Weather Patterns ◽  
Greenhouse Gases Emissions ◽  
Wide Range ◽  
The Future ◽  
Aerosol Emissions

<p>The occurrence of severe haze events remains a serious problem in Beijing. Previous studies suggested that the frequency of weather patterns conducive to haze may increase with global warming. The new Shared Socioeconomic Pathways (SSPs) cover a wide range of uncertainties in aerosol and greenhouse gases emissions. Global and Chinese aerosol emissions are projected to decrease in most SSPs, while increases in greenhouse gases and global warming will continue for the rest of the century. The future, therefore, remains unclear.</p><p>We quantified the air pollution over Beijing and associated weather patterns using multiple indices calculated from the SSPs</p><p>We show that the occurrence of weather patterns conducive to the formation of haze significantly increases by the end of the century due to increases in greenhouse gases. Aerosol reductions also cause an increase in their occurrence, but reduce the severity of haze, and overall reducing aerosol emissions will be beneficial.</p>

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