Energy, Sustainability and Society最新文献

Background

The transition towards a sustainable energy system is reshaping the demand for final energy, driven by the diffusion of new end-use technologies. This shift not only impacts consumers’ energy expenses, but also holds implications for the public budget. Building on data from a German energy transition scenario, we analyse the direct impact of energy costs on industries, low-income households, and changes in government revenues from the taxes and levies on final energy carriers. Our analysis considers the impact of current policies and explores a scenario introducing additional excise tax rates to offset potential revenue losses.

Results

We found that substantial carbon price increases could generate revenues that offset the losses from excise taxes on fossil fuels while enabling the financing of renewable support from the public budget by the end of this decade. Nevertheless, a decline in government revenues from taxes and levies is anticipated after 2030 until the middle of the century due to the declining use of fossil fuels. Maintaining current excise tax revenues during the transition could be achieved by introducing additional excise taxes on fossil fuels and electricity. Lastly, our analysis indicated a continuous decline in household energy expenditures until 2050, whereas energy-intensive industries face adverse impacts due to decarbonisation.

Conclusions

This research provides valuable insights into the fiscal implications of the energy transition, shedding light on different industrial sectors and households while considering the evolving impact on the public budget. Policymakers may need to consider systemic reforms or alternative financing mechanisms outside the energy system to balance the books.

Background

In the Himalayan region, fuelwood serves as a critical energy source for rural communities. Being vital for meeting energy needs, fuelwood combustion is a source of carbon dioxide (CO₂) emission and, consequently, global warming, as well as deforestation and public health damage. Therefore, quantifying fuelwood consumption patterns and its associated CO₂ emissions is essential to understand the environmental impact and promote sustainable resource management.

Methods

This research conducts an evaluation of fuelwood burning patterns and the associated CO₂ emissions in Azad Jammu and Kashmir (AJK), situated within the western Himalayan region. The study entails an extensive survey of 24 villages representing 240 households, equally distributed between the subtropical and temperate regions, each comprising 120 households. Data collection was executed through a combination of direct queries and the weight survey method, following standard protocols.

Results

In the study area, the mean annual fuelwood comsumption per household amounts to 24.28 ± 3.1 Mg (or 3.195 ± 1 Mg capita⁻¹). A variance was observed between subtropical and temperate zones, with the latter exhibiting higher consumption rates. The consequential CO₂ emissions were assessed as 41.88 ± 4.5 Mg per household (5.51 ± 0.6 Mg capita⁻¹). On a daily basis, households consumed an average of 66.52 ± 6.4 kg of fuelwood (8.75 ± 1.5 kg capita⁻¹), resulting in a daily CO₂ release rate of 114.745 ± 8.6 kg (15.095 ± 2 kg capita⁻¹). The findings unveiled seasonal variations, indicating increased fuelwood consumption and emissions during the winter season. Statistical analysis shed light on the significance of altitude and family size in shaping the patterns of fuelwood use.

Conclusions

The results revealed the importance of prioritizing forest conservation and strategically implementing sustainable practices, including reforestation, afforestation, responsible harvesting, and actively promoting sustainable fuel sources. This research highlights the vital role of well-designed policies focused on preserving ecosystems and improving energy management. Policy intervention can ensure the sustainable stewardship of local and regional forest resources.

Background

The Association of Southeast Asian Nations (ASEAN) relies mainly on fossil fuels in their energy supply, leading to higher CO₂ emissions, pollution, and further environmental degradation. This paper uses the panel vector autoregressive and the Granger non-causality test in the heterogeneous panels, together with long-run estimation techniques, to examine the dynamic link among energy consumption, economic growth, and carbon emissions with the focus on renewable energy for the ASEAN countries in the past three decades.

Results

The findings from this paper indicate that carbon emissions are associated with energy consumption. In contrast, renewable energy usage reduces CO₂ emissions, improving environmental quality. Economic growth is associated with increased energy consumption and carbon emissions in the ASEAN countries. The findings also indicate that the effects of energy consumption on economic growth are more significant than those of renewable energy in ASEAN. When considered together, these findings form a vicious circle regarding the energy–growth–emission nexus for the ASEAN economies. In addition, a bidirectional Granger causality among energy consumption, economic growth, CO₂ emissions and renewable energy usage is confirmed.

Conclusions

Renewable energy has emerged as an important viable option for the ASEAN nations to achieve their dual objectives of enhanced economic growth, reduced CO₂ emission, leading to improved environmental quality.

Background

Energy poverty, which is the deprivation of a series of energy services that satisfy human needs, affects over 2 billion individuals who rely on the combustion of biomass and other solid fuels to fulfill their energy needs. While certain communities address their energy shortfall by harnessing local natural resources, these alternatives fail to provide access to more advantageous and sustainable conditions, thus leading to what are commonly referred to as socioecological traps.

Results

This research studies the relationships between the energy alternatives that two communities have developed, the bioenergy capability that would allow the system to access more desirable and sustainable states, and the costs and benefits that are perceived from this new use of their residues and resources. A quantitative methodology was employed by designing and applying a structured questionnaire applied to 207 households in two energy-poor communities in the municipality of Irapuato, Guanajuato, Mexico: San Agustín de los Tordos and El Comedero Grande. We have inferred that the alternatives generated by the communities function as socioecological traps. On the one hand, these options generate adverse effects on the health of people and the environment, while discouraging the construction of bioenergy capabilities; on the other hand, they allow them to cover some training costs, at least in the short term. These discoveries suggest that the system is currently in an advantageous phase of the cultivation of new capabilities.

Conclusions

The outcomes of this study contribute significantly to enhancing our comprehension of socioecological traps and capabilities within the realm of energy, thereby offering valuable insights for the effective management of successful bioenergy implementation initiatives. Moreover, these findings enable the development of frameworks for theoretical interpretation and methodological application within specific contexts, exemplified in our case by rural communities in Irapuato, Guanajuato Mexico. The holistic approach reveals that while individuals may have alternatives to fulfill their energy requirements, many of these alternatives can inadvertently become socioecological traps. For instance, the use of firewood as a short-term solution for household energy needs can generate adverse health and environmental consequences in the long run. In the light of these considerations, a study of their nature becomes imperative and relevant as it delves deeply into the intricate relationship between compensatory alternatives and capacities. Simultaneously, it scrutinizes the community’s perception of bioenergy in terms of costs and benefits, with the overarching goal of transitioning toward a sustainable energy system.

Background

There is a race to innovate, develop or create hydrogen production technologies to accelerate energy transition and create a hydrogen economy. Acceptance has been used in social science literature as a lens through which to anticipate possible challenges surrounding hydrogen technologies. However, very few studies problematize perceptions and focus on the production of hydrogen. Hence, this study aims to bridge these theoretical and empirical gaps using a mixed-method approach based on semi-structured interviews (n = 7) and a questionnaire survey (n = 73) to understand stakeholders’ perceptions of hydrogen production sources through a social construction of technology lens.

Results

The findings suggest a tendency to favor hydrogen produced from renewable sources and to reject hydrogen produced from non-renewable sources. All the examined groups conform to this pattern. Their perceptions are based on prior knowledge of hydrogen technologies, with participants seeking information from specialized sources or from activities promoted by their organizations. Participants anticipate that hydrogen will be generated primarily through renewable energy sources and utilized where direct electrification is unfeasible. In addition, they envisage that the hydrogen economy will enhance energy democracy through representative participation in decision-making. Nevertheless, it is acknowledged that the topic is limited to certain social groups and kept away from the public eye. Furthermore, unlike the benefits, the perception of risk appears to have no impact on perceptions’ construction. High confidence in science appears to minimize the recognition of potential risks and bolster the recognition of potential benefits. There is, however, a lot of uncertainty about the possible real impacts of the hydrogen economy.

Conclusions

There appears to be a collective perspective on hydrogen production sources, indicating the existence of social representations. Nevertheless, group attitudes and backing towards hydrogen vary. The participants identify hydrogen as a matter that remained unnoticed for over a decade, despite its prominent position in the policies and economic approaches of numerous countries. The topic has been relegated to third parties. This exclusion of civil society from decision-making may justify the NGO group's critical stance towards hydrogen. Moreover, it suggests that energy democracy, which is based on information dissemination and participation, is not being achieved.

Background

In Tanzania, firewood, charcoal, and agricultural waste play a crucial role in daily life as sources of cooking energy, especially in rural areas. Using these energy sources contributes to deforestation and the emission of harmful substances, leading to health problems. This study highlights the potential of faecal sludge briquettes as an innovative, environmentally friendly, and sustainable alternative to traditional energy sources to meet the increasing demand for cooking energy in Tanzania. The process involved sludge characterization, drying, sorting, carbonization, milling, briquette making, and characterization.

Results

A study was conducted to assess the presence of zinc (Zn), cadmium (Cd), and lead (Pb) in faecal sludge collected from households. The results indicates that the levels of these metals were all within the acceptable limits set by the Tanzanian Standards (TZS) for sludge disposal and use in the environment, which are 5.00 mg/L, 5.00 mg/L, and 30.00 mg/L, respectively. Septic tanks and pit latrines sludge had a concentration of 0.5 mg/L and 0.5 mg/L for Zn, 0.55 mg/L, and 0.6 mg/L for Cd, and 10.01 mg/L and 4.87 mg/L for Pb, respectively. Adding 75% charcoal dust improved the gross and net heating values from 10.47 and 10.16 to 19.29 and 18.86 MJ/kg, respectively. Similarly, adding 50% charcoal dust improved the gross and net heating values to 19.24 and 18.78 MJ/kg. The emission of particulate matter (micrograms/m³) was reduced from 30.4 and 35 to 10.3 and 11.8 for PM_2.5 and 7 and 8 for PM_10, while carbon monoxide emission decreased from 51.2 to 19.7 ppm.

Conclusion

The results strongly suggest that briquettes made of carbonized faecal sludge mixed with other biomass materials could offer an alternative to traditional solid fuels, with the added benefits of reducing greenhouse gas emissions, deforestation, and longer burning times.

Background

Energy cooperatives in Europe have become more prominent due to the growing interest in and development of renewable energy sources. Cooperatives are often seen as an instrument in the transition to a low-carbon future. The cooperative prosumer is gaining importance, taking on the role of both consumer and producer by setting up and joining electricity cooperatives as investors, shareholders and clients. As is the case with other cooperatives and social enterprises, there are tensions and trade-offs to be made between social, ecological and financial goals. To navigate these tensions and to work towards becoming a resilient institution, it is important that cooperatives preserve their support base made up of their members, who are both clients and shareholders. This study investigates the preference heterogeneity and motivations of members of a large energy cooperative in Belgium, by using stated-choice data from a Discrete Choice Experiment in combination with self-reported membership motives.

Results

Despite the significant presence of member preferences for participation and democratic voting rights, the financial and above all the ecological motives seem to be most important for being a member of the energy cooperative. Based on the stated-choice data, we classify three member types: the financial, the ecological and the social–societal member type. We find a small discrepancy in motives between members who joined early and members who joined later. Where early members care most about ecological aspects, members who joined later have more societal and financial considerations. In terms of effect size and willingness to pay per kilowatt hour, ecological motives prove to be by far the most important factor for cooperative energy prosumers in our sample. In addition, the latent-class analysis shows that over half of the member sample belongs to the ecological motives class.

Conclusions

Preference heterogeneity is present to an extent, but there is an overarching preference for sustainability. Though, cooperatives should be aware that their legal form may not be the only factor that drives membership. Rather, keeping high levels of renewable energy, competitive pricing and being an interesting investment opportunity may be key to cooperatives’ resilience and further development on the energy market.

Background

Injera is food consumed daily by Ethiopians like bread and rice in other parts of the world. Biomass stoves are used to bake Injera in most rural households. The unsustainable use of fuelwood causes deforestation. Improved cook stoves such as Mirt (name in local language) were introduced to replace traditional stoves and save fuel wood. This study presents a performance comparison of three newly developed prototype biomass stoves with traditional and Mirt stoves. The prototype stoves were made with a clay pan (designated MUC: Mekelle University prototype with clay pan), with a glass pan (MUG) and with an aluminum pan (MUA). Controlled cooking tests were conducted for each type of stove to determine the thermal efficiency and specific fuel consumption.

Results

The thermal efficiencies of the traditional, Mirt, MUC, MUA and MUG stoves were found to be 14%, 17%, 21%, 29% and 32%, respectively. Similarly, the percentage fuel wood savings by Mirt, MUC, MUA and MUG compared to the traditional stove were 32%, 48%, 64% and 67%, respectively. The results indicate that the prototype stoves had significantly better performance compared to the traditional and Mirt stoves.

Conclusion

The prototype stoves have the potential to reduce fuel wood consumption by more than half of that currently consumed employing traditional stoves. In addition to the economic benefit of saving fuel wood, the improved stoves will have significant environmental implication. Based on the fuel saving figures, it is estimated that 0.4, 0.5 and 0.52 tons/year of fuel wood may be saved per household adopting MUC, MUA and MUG stoves, respectively.

Background

The choice of energy sources is essential for sustainable development to combat different environmental issues caused by the consumption of fossil fuels. Though diesel engines are considered more efficient and reliable than other internal combustion engines, they emit different harmful pollutants which are detrimental to human health and the environment. Researchers are trying to find suitable alternative fuels for diesel engines with lower pollutant emissions and without much compromise in the efficiency of the engine. In this regard, water-emulsified diesel (WED) may be considered to be one of the most suitable alternative fuels. It is expected that the entire world will use electric vehicles in the long term. However, the complete replacement of IC engines in the near future is not feasible. In fact, different European countries have targeted to ban the use of diesel engine cars before the middle of the twenty-first century. Prior to that date, hybrid vehicles will be more popular and diesel engines will continue to play an important role. Hence, research involving improvements in diesel-operated IC engines is still relevant.

Methods

An experimental investigation was carried out using WED containing 10% water by volume as a fuel in a diesel engine at four different fuel injection pressures. The WED was prepared using an ultrasonicator.

Results

With the increase of injection pressure, peak net heat release rate and in-cylinder pressure are found to have increased. Brake thermal efficiency is also found to have improved at higher injection pressure. The maximum efficiency was recorded when a WED at 210 bar of injection pressure is used, and it is about 3.3% higher than the maximum efficiency achieved when using normal diesel at the same pressure of fuel injection. At a higher load, neat brake-specific fuel consumption is found to be less compared to neat diesel, when only the amount of diesel contained in the emulsion as a fuel is considered. Maximum reduction in both NO_x and smoke emission by using WED is recorded at 210 bar, and the average reductions are determined to be 32.6% and 51.9%, respectively.

Conclusions

WED can be used as an alternative fuel for existing diesel engines without any retrofitting and with significant reduction in the emissions of pollutants compared to normal diesel fuel. It can also be concluded that at higher injection pressure, the combustion, performance and emission characteristics of compression ignition engines are improved when using emulsified diesel.