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Drawing from examples in Germany, California, and Australia, we show that large scale integration of renewable energy in existing electricity grids does not necessarily lead to cheaper electricity, the strengthening of energy secu...
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Drawing from examples in Germany, California, and Australia, we show that large scale integration of renewable energy in existing electricity grids does not necessarily lead to cheaper electricity, the strengthening of energy security, or the enhancement of economic equity. Indeed, efforts to integrate renewable energy into the grid can thwart efforts to reduce chronic poverty. Planners around the world need to be cautious, pragmatic and realistic when attempting to similarly decarbonize their energy systems.
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Significantly reducing building sector greenhouse gas emissions is necessary to meet state and local climate stabilization goals. Initiatives to decarbonize home and building energy use are enabled by a new generation of advanced ...
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Significantly reducing building sector greenhouse gas emissions is necessary to meet state and local climate stabilization goals. Initiatives to decarbonize home and building energy use are enabled by a new generation of advanced air source heat pumps (ASHPs) that provide efficient, comfortable heat even at low outdoor temperatures as well as highly efficient air conditioning in the summer. Coupled with thermal improvements to building envelopes and smart controls responsive to grid reliability needs, ASHPs are displacing the use of fossil fuels for comfort heating while providing a range of economic benefits. Investments to decarbonize buildings are most economical in natural market cycles of building construction, renovation and equipment replacement, and as part of community development initiatives to improve and preserve affordable housing. A growing number of state and local policies and programs are accelerating the rate of efficient electrification of home and building heating to replace fossil fuel heat with increasingly carbon-free renewable electricity.
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Europe anchored aspiring targets in achieving climate neutrality and this motivates the research communities to analyze, investigate and frame strategies to achieve the goals in the stipulated timeframe. This study reviews the eff...
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Europe anchored aspiring targets in achieving climate neutrality and this motivates the research communities to analyze, investigate and frame strategies to achieve the goals in the stipulated timeframe. This study reviews the effective decarbonization strategies in the context of Europe's climate neutral vision. Initially, the study analyzes the reasons for ever-increasing emissions and investigates the perception of decarbonization in line with various influencing factors such as population size, economic growth, energy intensity, emission intensity, innovation, affordability and time. Subsequently, an in-depth qualitative analysis is performed to force out the challenges that Europe faces in decarbonizing the heating sector from the aspects, such as using clean energy resources, effective heat energy conversion and management approaches. Sustainable approaches and practices are proposed to mitigate carbonization and to promote carbon sink in line with the major problems associated with various sectors such as building, energy, industry and transportation sector. Furthermore, the roles of digitalization in decarbonization are explored and the inherent challenges are also discussed. This study also reviews various decarbonization policies that can direct the governments' action to effectively make a transition towards a climate-neutral society. The key findings highlight that solar energy utilization in small-scale is relatively not preferable for heat energy conversion in Europe due to climatic conditions, while district heating network with bio-and geothermal energy resource highly favors clean heat transformation scenario. In addition, 3D printing has a prodigious role to reduce building lifecycle emissions and hybrid policies as well as reward-based policies yields better outcomes. Promoting hydrogen utilization and carbon capture storage and utilization technologies can pivot climate neutrality in the sectors that are difficult to decarbonize. On the other hand, it can be observed that more focus is provided to reduce emissions and significantly less attention is focused on carbon sink.
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The emission targets agreed in Paris require a radical reduction of material extraction, use and disposal. The core claim of this article is that a radical dematerialization can only be part and parcel of degrowth. Given that capi...
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The emission targets agreed in Paris require a radical reduction of material extraction, use and disposal. The core claim of this article is that a radical dematerialization can only be part and parcel of degrowth. Given that capitalist economies are designed to grow, this raises the question of whether, and under what circumstances, the inevitable 'degrowth' can become socially sustainable. Three economic policies are discussed in this direction: work-sharing, green taxes and public money.
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Over the past 70 years dozens of works that deal with the relationship between the properties of limestone, burning modes and properties of lime were created. The expected properties of lime should be proportionate to the nature a...
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Over the past 70 years dozens of works that deal with the relationship between the properties of limestone, burning modes and properties of lime were created. The expected properties of lime should be proportionate to the nature and burning technology of limestone. But very often the reality is different. General relationships and dependencies have not been found yet. The aim of this work was to determine the relationship among the properties of limestone, lime, hydrated lime. The second aim has been to describe influence of the burning process on the properties of the material mentioned above. For this purpose it was necessary to get a enough wide set of data by performing a comprehensive analysis of various types of limestone. Partial dependencies have been already found on the initial results. An example might be dependence of the samples porosity to decarbonation rate or to its geological age. Due to the realization of this stage of research a coherent set of data was created. This dataset will be used for further research in this area.
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An analysis of electricity systems in Germany, California and Wisconsin finds that balanced portfolios made up of zero- and low-carbon baseload resources, as well as wind and solar, are the most costeffective means of producing el...
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An analysis of electricity systems in Germany, California and Wisconsin finds that balanced portfolios made up of zero- and low-carbon baseload resources, as well as wind and solar, are the most costeffective means of producing electricity and reducing carbon.
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Solid sorbents can be used to capture CO_2 from pre-combustion sources at various temperatures. MgO and CaO are typical medium- and high-temperature CO_2 sorbents. However, pure MgO is not active toward CO_2. The addition of Na_2C...
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Solid sorbents can be used to capture CO_2 from pre-combustion sources at various temperatures. MgO and CaO are typical medium- and high-temperature CO_2 sorbents. However, pure MgO is not active toward CO_2. The addition of Na_2CO_3 increases the operating temperature and significantly increases the reactivity of sorbents to capture CO_2. Na_2CO_3-promoted MgO is a promising medium-temperature CO_2 sorbent. In this study, the thermodynamic performance of integrated gasification combined cycle (IGCC) systems with Na_2CO_3-MgO-based warm gas decarbonation (WGDC) and CaO-based hot gas decarbonation (HGDC) is evaluated and compared with that of an IGCC system with methyldiethanolamine (MDEA)-based cold gas decarbonation (CGDC). Assuming that the average CO_2 capture capacities of solid sorbents are one-third of their theoretical maxima, we reveal that the IGCC system undergoes approximately 2.8% and 3.6% improvement on net efficiency when switching from CGDC to WGDC and to HGDC, respectively. The net efficiency of the system is increased by improving the CO_2 capture capacity of the sorbent. The IGCC with Na_2CO_3 -MgO experiences more significant increase in efficiency than that with CaO along with the improvement of sorbent average CO_2 capture capacity. The efficiency of the IGCC systems reaches the same value when the average CO_2 capture capacities of both sorbents are 53% of their theoretical levels. The effects of gas turbine combustor fuel gas inlet temperature on IGCC system performance are analyzed. Results show that the efficiency of the IGCC systems with HGDC and WGDC increases by 0.74% and 0.53% respectively as the fuel gas inlet temperature increases from 250 ℃ to 650 ℃.
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As the push for decarbonization continues to gain momentum, it is essential that facility managers take a closer look at the role HVAC systems play in emissions and energy consumption. By leveraging new technologies, they can impr...
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As the push for decarbonization continues to gain momentum, it is essential that facility managers take a closer look at the role HVAC systems play in emissions and energy consumption. By leveraging new technologies, they can improve the efficiency and sustainability of their buildings while also saving money in the process.
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Heatwaves in Spain. Searing temperatures in Pakistan. Not forgetting the recent sweltering high of 36.7 °C in Singapore. We know that climate change is not slowing down anytime soon. This has led to a pressing need to limit warmi...
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Heatwaves in Spain. Searing temperatures in Pakistan. Not forgetting the recent sweltering high of 36.7 °C in Singapore. We know that climate change is not slowing down anytime soon. This has led to a pressing need to limit warming to 1.5 °C above pre-industrial levels. To achieve this, it is imperative to halve carbon emissions by 2030 and hit net-zero by 2050.
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The world is embarking on a monumental energy transition with the aim of decarbonizing the global energy infrastructure. While essential, we must not underestimate the scale and difficulty of this transition. Currently 85% of glob...
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The world is embarking on a monumental energy transition with the aim of decarbonizing the global energy infrastructure. While essential, we must not underestimate the scale and difficulty of this transition. Currently 85% of global energy supply comes from fossil fuels. In addition to replacing this existing energy supply with greener, cleaner options, we will simultaneously need to increase the absolute amount of energy available to society due to an expanding global population that is becoming more urbanised and aspires to greater affluence.
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