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Sustainable energy development implies an effective use of economic, human, technological, renewable and non-renewable natural resources. The gradual process of natural environment degradation and the inevitable exhaustion of natural fossil fuel deposits force the search for alternatives. A comparison of alternative opportunities to generate energy allows to identify their advantages and drawbacks. The article attempts a systematic review of factors ‘in favour of’ and ‘against’ the use of renewable energy sources (RES) in accordance with the principle of sustainable development. The study applies descriptive methods, including comparisons. CSO and ERO were the sources of data for 1988- 2018. According to sustainable development principles, investments in RE need to be widely promoted and supported by the state, especially in rural areas. The attempt to systematise factors contributing to the use of renewable energy resulted in the identification of: the importance of economic circumstances and the traditional approach to the energy sector; the need to protect the natural environment by the reduction of pollution and mitigation of the greenhouse effect; the need for continuing the education of society on the implementation and fast development of technology and the desire to enhance self-reliance and independence in energy supply with a special consideration of rural areas.
Bio-economy requires the participation that engages societies, including the local communities. In this context, the aim of the study is to recognize the opinion of the local community regarding the legitimacy of the use of existing local renewable energy potential, which will take the appropriate actions in the field of RES for the full implementation of the bio-economy program. The study assumed that a considerable degree of acceptance of renewable energy sources can be a powerful argument in order to confirm the thesis that as a result of income growth and consumer demand the multiplier effect of the use of RES will appear, contributing to local development. The tests were performed using factual methods. Secondary research, indirect (desk research), carried out in the process of exploring the problem. Field research, direct primary research, enabled the acquisition of primary data to enable the implementation of the targets. In examining the opinions of the populations of krośnieńsko-przemyski area sought to determine the relationship between the local community to the possibility of the use of renewable energy sources at the local level. Recognized opinions allowed to determine whether there is approval, disapproval, or no opinion on the use of renewable energy sources. Substantial increase in the share of RES technologies in the surveyed communes of Przemysl and Krosno sub-regions should be based on agricultural biomass, forest biomass, wind energy, geothermal energy, and solar energy. Tested communities have different often divergent opinions as to the validity of the use of RES on the local level, nevertheless a large interest in modern technologies and renewable sources of their funding is observed. The local community in the majority wants to pursue undertakings in the field of renewable energy, mainly based on solar and wind energy. There is a need to further identify and develop local potentials, including the use of social energy from renewable sources.
The aim of the study was to specify and analyse the actions taken by the German Government in order to enhance the environment protection by reducing the amount of greenhouse gases. The study used secondary data, which included research conducted by the German government facilities concerning the public perception of economic policy in the field of climate protection and the attitude of the society to environmental safety. According to analysis, the German public perceives the safe future for their children (75%) in efforts to protect the climate. The efficiency of the economic activities is also affected by the initiatives instigated by the Government in selected countries.
Willow biomass can be collected in the form of entire or chipped shoots. The method depends on the harvest cycle of the plants, availability of necessary machines and the expected use of harvested raw material. Methods of harvesting influence on biomass quality during its acquisition and further in the storage period. Therefore, the aim of the research was to characterize the harvest of willow plantation with the use of a biobaler WB 55 and to assess the quality of the obtained biomass during the 9-month period of its storage. Willow was harvested with biobaler WB 55 in January 2010 on a commercial plantation. The 3.5 ha plantation was situated in the north-east of Poland, in the village of Dorotowo (53°42′9.88″ N 20°25′11.02″ E). An analysis of the biomass quality in terms of its thermophysical and chemical properties was carried out at the laboratory of the Department of Plant Breeding and Seed Production of the UWM in Olsztyn. Willow harvesting with a unit consisting of a 129 kW tractor and biobaler WB 55 was conducted efficiently. The average harvesting efficiency was about 18 bales per hour of the unit operation (8.75 Mg h-1 FM). The fresh matter density in the bales averaged 358.10 kg m-3 FM, whereas in dry matter it was 166.16 kg m-3 DM. With extended duration of storage, the quality of willow biomass as an energy raw material improved. The biomass in the bales steadily lost its moisture, from 53.06% in January to 17.48% in September. On the other hand, the lower heating value increased during that same period from 7.75 MJ kg-1 to 15.65 MJ kg-1. It has been found based on the observations made during the study period that the advantages of a biobaler WB 55 are the easy and efficient harvesting of plants on a plantation and bales can be used for energy production as needed.
The production of renewable energy from biomass, including seeds and their products (oil), is of high importance. The basis of that production may be the cultivation of plants “typical” for a certain region. Lower importance is put on marginal plants, such as willow, topinambur etc. These plants cannot rival plants like rapeseed, potato, corn, cereal, in spite of the fact that they produce a lot of green mass. In many countries of the EU, including Poland, the highest importance is put on the production of biodiesel used as biofuel in self-ignition combustion engines. The availability of locally produced biofuels would cause greater independence from external factors.
In Poland the market in wood biomass for energy purposes is characterised by large cognitive gap concerning wood biomass supply, despite the growing importance of this subsection of the wood and energy markets. The article presents the results of research on the supply of wood biomass for energy purposes in Poland in 2010 and forecasted supply by 2015. The research process utilised model approach, relating to supply of wood biomass by the main sources of its production.
Due to their quantitative and qualitative potential, rural areas participate to a significant degree in the achievement of the indicative targets resulting from the climatic package. Thanks to the production of biomass and, increasingly often, energy itself during the 2005–2014 period, the share of RES (renewable energy sources) in the production of primary energy grew twofold from 5.8% to 12.1%. Biomass was the main source, but since 2010 the use of wind and sun in the production of energy has been growing rapidly. Given that the costs of alternative sources for energy production (mainly electricity) are considerably higher than in case of using raw fuels, the development of this market depends on the amount of subsidies. The system applied in Poland is widely criticized because it favours large hydroelectric power plants and co-combustion, which arouses considerable environmental, technical, market and strategic controversies. Maintaining the current support system could therefore have significant implications for the structure of the market, because it is not conducive to the development of energy, based on the initiative of citizens and their communities. It remains untapped economic potential also in industrial policy and services and, in particular, in case of RES small- and micro-installations.
There are various biomass energy technologies with imbalanced application status spread all over Sub-Sahara Africa. Currently, some biomass technologies have been developed maturely in the market such as biogas, that can be economically competitive, commercially developed, and applied in large scale, while other technologies are in the early stage of commercial applications, that need subsidies and other financial incentives to encourage them in the market. These include biomass power, biomass pallet fuel, biofuels from non-grain feedstock, etc. There are also many emerging biomass technologies which are at R&D and demonstration stage and are expected to develop into industrial and commercial applications, such as biological ethanol fuel from cellulose and biodiesel from oil plants. Due to the differences in terms of technology maturity, development stage, market competitiveness, and future perspectives of the various biomass technologies, the obstacles can be different, the needed incentives also vary. It is an important task for Sub-Sahara African Countries to study and design a biomass energy development program to ensure implementation of the region’s biomass energy development objectives. The biomass energy development program in Sub-Sahara Africa should include assessment of various biomass technology status and objectives, development of approaches in biomass technology research and development, pilot projects, demonstration, and application promotions, and identify supporting incentives in techniques and regulations.
The use and development of renewable energy sources is one of the basic issues in the Poland’s Energy Policy until 2030. It is planned that the renewable energy technologies should constitute 25.4% of the overall power capacity in 2020. Solid biomass dominates in the structure of the production of renewable energy, whereas biofuels and solar energy constitute a fraction of one percent. The analysis of the dynamics of changes in the consumption of energy indicates the constant use of electricity, and a decreasing energy intensities GDP. The production of electricity based on renewable energy is increasing dynamically (indicated by the exponential form of the trend line) and the short-term forecast has a small error of predication – below 15%.
This paper analyzes energy sources climate northeastern Montenegro, in the example municipalities Berane, Andrijevica and Plav in a geographical context its exploitation and use. Analyzed GeoScape from the standpoint of utilization of wind energy lose their its attractiveness due to high altitude mountain ranges that dominate in given area, it is the windy areas, often the located on slopes of the mountains, and most of them did not connected to the existing road network and infrastructure. The use of solar thermal energy is possible only with the help of passive solar architecture and active solar architecture (solar collectors for water heating and space heating in homes and tourist facilities). Program development and use of renewable energy in Montenegro, given the Energy Law of 2010 in which Montenegro has implemented parts of EU directive 2009/28/EC on the promotion of energy from renewable sources.
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