scholarly journals Study and Development of a Complete System for Recovery, Recycle, and Disposal of Refrigerant Gas from Existent Plants

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Corrado Genta ◽  
Carmine Marotta ◽  
Fortunato Migliardini
Keyword(s):  
Global Warming ◽  
Ozone Depletion ◽  
Emission Reduction ◽  
Complete System ◽  
International Community ◽  
Industrial Plants ◽  
Gas Recovery ◽  
Complete Plant ◽  
Concentration Levels

The increasing attention of international community towards ozone depletion control and global warming issues has encouraged the development of strategies for emission reduction of fluoridate refrigerant gases. In this context innovative industrial plants able to recover, recycle, and dispose the refrigerant gases need to be developed. In this paper the different phases of design, realization, and characterization of a complete plant for used refrigerant gas recovery are described. The analysis of the pollutants present in the refrigerant stream has supported the design and realization of equipment able to control these emissions and to restore the concentration levels compatible with AHRI standards.

scholarly journals Subcritical and Supercritical Operation of Innovative Thermal Mechanical Refrigeration System

2020 ◽  
Author(s):  
Ahmad Sleiti ◽  
Wahib Al-Ammari ◽  
Mohammed Al-Khawaja ◽  
Maxim Glushenkov ◽  
Alexander Kronberg
Keyword(s):  
Global Warming ◽  
Ozone Depletion ◽  
Fossil Fuels ◽  
Waste Heat ◽  
Low Frequency ◽  
Low Grade ◽  
Refrigeration System ◽  
Heat System ◽  
Global Warming Potentials ◽  
Carbon Dioxide Co2

Around 17% of the globally generated energy is consumed for residential, commercial, and transportation refrigeration. The current cooling technologies utilize refrigerants with high Ozone Depletion and Global Warming Potentials. Furthermore, the current technologies are expensive alongside with toxicity and flammability hazards. On the other side, energy produced by combustion of fossil fuels results in substantial amounts of waste heat. Therefore, it is necessary to develop new refrigeration technologies that utilize waste heat as a source of energy with ecofriendly refrigerants with zero ozone depletion potential and zero global warming potential. In addition, this thermal mechanical refrigeration (TMR) technology improves the energy efficiency of the source of waste heat system and minimizes the emissions of the carbon dioxide (CO2). In this study, a novel thermo-mechanical refrigeration system is proposed. It operates with low-grade energy sources (such as waste heat) at temperature range of 60 oC to 100 oC. Furthermore, it has the advantage of working with low-frequency driver-compressor unit, which eliminates noise and increases its lifetime. Moreover, the TMR system is adaptable to commercial, transportation, and residential refrigeration applications.

scholarly journals A Moving 3D Laser Scanner for Automated Underbridge Inspection

2017 ◽  
Author(s):  
Marco Tarabini ◽  
Hermes Giberti ◽  
Silvio Giancola ◽  
Matteo Sgrenzaroli ◽  
Remo Sala ◽  
...  
Keyword(s):  
Measurement Uncertainty ◽  
Numerical Simulations ◽  
Relative Motion ◽  
Reference System ◽  
Complete System ◽  
Laser Scanner ◽  
Bridge Model ◽  
Fixed Reference ◽  
Scanning Head

Recent researches proved that the underbridge geometry can be reconstructed by mounting a 3D laser scanner on a motorized cart travelling on a walkway located under the bridge. The walkway is moved by a truck and the accuracy of the bridge model depends on the accuracy of the trajectory of the scanning head with respect to a fixed reference system. In this paper, we describe the metrological characterization of a method that uses non-contact systems to identify the relative motion of the cart with respect to the walkway; the orientation of the walkway with respect to the bridge is determined using inclinometers and optical rails, while the position of the truck with respect to the bridge is measured using a conventional odometer.  The measurement uncertainty of the proposed system was initially evaluated by numerical simulations and successively verified by experiments in laboratory conditions. The complete system has then been tested in operative conditions; the validity of the proposed approach has been demonstrated by comparing the geometry of buildings reconstructed with the proposed system with the geometry obtained with a static scan. Results evidenced that the errors are approximately 6 mm.

Landscape Biodiversity Characterization in Ecoregion 29 Using MODIS

2013 ◽  
pp. 815-831
Author(s):  
Nitin Kumar Tripathi ◽  
Aung Phey Khant
Keyword(s):  
Climate Change ◽  
Remote Sensing ◽  
Global Warming ◽  
Forest Type ◽  
Regional Scale ◽  
Remote Sensing Data ◽  
Modis Data ◽  
Moderate Resolution ◽  
Landscape Biodiversity

Biodiversity conservation is a challenging task due to ever growing impact of global warming and climate change. The chapter discusses various aspects of biodiversity parameters that can be estimated using remote sensing data. Moderate resolution satellite (MODIS) data was used to demonstrate the biodiversity characterization of Ecoregion 29. Forest type map linked to density of the study area was also developed by MODIS data. The outcome states that remote sensing and geographic information systems can be used in combination to derive various parameters related to biodiversity surveillance at a regional scale.

Introduction

2021 ◽  
pp. 1-10
Author(s):  
Eelco J. Rohling
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Greenhouse Gases ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Emission Reduction ◽  
Climate Change Impacts ◽  
Paris Agreement ◽  
Gas Emissions ◽  
Is Implementation

This chapter outlines the challenge facing us. The Paris Agreement sets a target maximum of 2°C global warming and a preferred limit of 1.5°C. Yet, the subsequent combined national pledges for emission reduction suffice only for limiting warming to roughly 3°C. And because most nations are falling considerably short of meeting their pledges, even greater warming may become locked in. Something more drastic and wide-ranging is needed: a multi-pronged strategy. These different prongs to the climate-change solution are introduced in this chapter and explored one by one in the following chapters. First is rapid, massive reduction of greenhouse gas emissions. Second is implementation of ways to remove greenhouse gases from the atmosphere. Third may be increasing the reflectivity of Earth to incoming sunlight, to cool certain places down more rapidly. In addition, we need to protect ourselves from climate-change impacts that have already become inevitable.

On the Global Dimension of Environmental Challenges

1994 ◽  
Vol 13 (2) ◽  
pp. 173-181
Author(s):  
Paul Wapner
Keyword(s):  
Global Warming ◽  
Ozone Depletion ◽  
Biological Diversity ◽  
Global Dimension ◽  
Human Beings ◽  
Human Rights Abuses ◽  
Global Issues ◽  
Global Challenge ◽  
Bona Fide ◽  
Physical Consequences

While human beings have always been able to visualize and seemingly care about the entire globe, it is only recently that the world has come to know genuinely global problems. Global warming, ozone depletion, and threats to biological diversity represent the first, bona fide global challenges, because they threaten the fundamental organic infrastructure that supports life on earth. If they come to pass, they will have universal physical consequences, in contrast to the more circumscribed consequences of non-global issues. This understanding conflicts with much contemporary thinking, which tends to see all problems—from poverty and hunger to war and human rights abuses—as global in character and thus in need of globalist responses. Proper understanding of what constitutes a genuinely global challenge will work against this tendency, and thus encourage addressing problems at the most appropriate level of governance. This article tries to provide such an understanding. It delineates the global dimension of global warming, ozone depletion, and threats to biological diversity and—after differentiating local, regional, and global issues—argues against addressing all common, transboundary challenges at the global level.

scholarly journals SMEs’ External Technology R&D Cooperation Network Diversity and Their Greenhouse Gas Emission Reduction and Energy Saving: A Moderated Mediation Analysis

2018 ◽  
Vol 11 (1) ◽  
pp. 115 ◽  
Author(s):  
Yong Hau
Keyword(s):  
Global Warming ◽  
Energy Saving ◽  
Absorptive Capacity ◽  
Emission Reduction ◽  
Ghg Emission ◽  
Production Time ◽  
Network Diversity ◽  
Cooperation Network ◽  
Time Reduction ◽  
The Relationship

The purpose of this research is to empirically reveal the effect of external technology R&D cooperation network diversity (ETRDCND) on the greenhouse gas (GHG) emission reduction and energy saving of small and medium-sized enterprises (SMEs). Besides this, this study aims at analyzing the roles of production time reduction and absorptive capacity in the relationship between SMEs’ ETRDCND and their GHG emission reduction and energy saving. GHG emission and energy usage have been playing a crucial role in aggravating global warming. Global warming results in big problems such as worldwide unusual weather and health disorders. SMEs play a substantial role in the industrial growth of the global economy, which increases GHG emission and energy consumption. By performing the ordinary least squares regression with the data of 3300 South Korean SMEs, this research reveals four points. First, ETRDCND positively influences SMEs’ GHG emission reduction and energy saving. Second, production time reduction perfectly mediates the relationship between SMEs’ ETRDCND and their GHG emission reduction and energy saving. Third, the mediating role of production time reduction in this relationship is moderated by SMEs’ absorptive capacity. Fourth, ETRDCND significantly influences SMEs’ GHG emission reduction and their energy saving only if SMEs possess their own absorptive capacity.

scholarly journals Can ozone depletion and global warming interact to produce rapid climate change?

2000 ◽  
Vol 97 (4) ◽  
pp. 1412-1417 ◽  
Author(s):  
D. L. Hartmann ◽  
J. M. Wallace ◽  
V. Limpasuvan ◽  
D. W. J. Thompson ◽  
J. R. Holton
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Ozone Depletion ◽  
Rapid Climate Change
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