Energy flexibility can address the challenges of large scale integration of renewable energy resources and thereby increasing imbalance in the power system. Flexible power system can provide reliable supply, low elect...Energy flexibility can address the challenges of large scale integration of renewable energy resources and thereby increasing imbalance in the power system. Flexible power system can provide reliable supply, low electricity cost and sustainability. Various situations and factors influence the adoption of the flexibility solutions, such as flexible electricity generation, demand-response, and electricity storage. This paper tries to analyze the current energy flexibility solutions and the factors that can influence the energy flexibility adoption. This paper takes Philippines as case study to provide an overview of the current condition of the Philippines＇ power system and discuss the energy flexibility in the Philippines＇ power system. A further discussion and recommendation is conducted in the end of the paper.展开更多
Botswana currently depends on electricity generated from coal-based power plant or electricity supplied from the border in South Africa. The country has good reserves of coal and the solar radiation is sufficiently hi...Botswana currently depends on electricity generated from coal-based power plant or electricity supplied from the border in South Africa. The country has good reserves of coal and the solar radiation is sufficiently high to make solar thermal attractive for generating electricity. The paper presents two conceptual coal-fired power station designs in which a solar sub-system augments heat to the feed heaters or to the boiler. The thermal and economic analyses showed enhanced system performance which indicates that solar power could be embedded into existing fossil fuel plants or new power stations. Integrating solar energy with existing or new fossil fuel based power plants could reduce the cost of stand-alone solar thermal power stations, reduce CO2 emissions and produce experience necessary to operate a full scale solar thermal electricity generation facility.展开更多
This study examines the state of liveability in emerging urban centers of Ago-lwoye and Ijebu-Igbo in Ogun State. The study used primary and secondary data. Both descriptive and inferential statistical techniques were...This study examines the state of liveability in emerging urban centers of Ago-lwoye and Ijebu-Igbo in Ogun State. The study used primary and secondary data. Both descriptive and inferential statistical techniques were used to analyze research questions that bother on urban liveability. Results of the analyses show that in the two urban centres the following are not in very good condition： neighborhood road quality, garbage collection, state of cleanliness, street light, state of security, pollution, water supply, drainage system, and power supply. Most of the residents are not satisfied with the state of liveability in Ago-Iwoye and Ijebu-Igbo towns. Statistical test result shows among others that there is no significant variation in the level of urban dwellers＇ satisfaction with their neighbourhood condition. In order to improve urban liveability in the two urban centres, government should provide all necessary infrastructural facilities and services. While roads are to be improved and maintained, electricity and water supply should be provided. Community associations should also be encouraged. They should be more involved in activities that will improve liveability in the urban centre. They should constitute themselves as pressure groups, working on the government to improve the liveability of the urban centre.展开更多
The demand for energy, water and food will continuously increase, as the prediction states that 2.5 billion people will be added to the world population by 2050, representing not only an increase in the consumption bu...The demand for energy, water and food will continuously increase, as the prediction states that 2.5 billion people will be added to the world population by 2050, representing not only an increase in the consumption but also more waste production, greenhouse gas （GHG） emissions and depletion of natural resources. Taking into account that renewable sources of energy can help to overcome these challenges and diversify the energy matrix in the countries, this paper aims at analyzing the biogas potential in Brazil and the United States, especially in the livestock sector, and its benefits in the environmental, social and economic aspects. Both countries are among the top five countries globally in terms of water availability, energy consumption and food production. Until 2050, the world consumption of meat will have a significant increase： 206% of poultry meat, 56% of pork meat and 47% of beef meat, augmenting the need for sustainable management of waste and manure. This scenario can become a sustainable opportunity for biogas implementation, which provides multiple economic, environmental and social benefits for farmers, businesses and communities, including production of electrical, thermal and vehicular energy, production of high-quality biofertilizer, reduction of ground and surface water pollution and reduction of GHG emissions, and foments new income for the farmers, among others. A new concept is presented in this article to make biogas systems feasible, i.e., biogas condominiums, as small and medium-scale farms by themselves usually would not be able to afford the investments. This arrangement can bring benefits for the whole biogas supply chain that includes farmers, agroindustry, providers and local community.展开更多
文摘Energy flexibility can address the challenges of large scale integration of renewable energy resources and thereby increasing imbalance in the power system. Flexible power system can provide reliable supply, low electricity cost and sustainability. Various situations and factors influence the adoption of the flexibility solutions, such as flexible electricity generation, demand-response, and electricity storage. This paper tries to analyze the current energy flexibility solutions and the factors that can influence the energy flexibility adoption. This paper takes Philippines as case study to provide an overview of the current condition of the Philippines＇ power system and discuss the energy flexibility in the Philippines＇ power system. A further discussion and recommendation is conducted in the end of the paper.
文摘Botswana currently depends on electricity generated from coal-based power plant or electricity supplied from the border in South Africa. The country has good reserves of coal and the solar radiation is sufficiently high to make solar thermal attractive for generating electricity. The paper presents two conceptual coal-fired power station designs in which a solar sub-system augments heat to the feed heaters or to the boiler. The thermal and economic analyses showed enhanced system performance which indicates that solar power could be embedded into existing fossil fuel plants or new power stations. Integrating solar energy with existing or new fossil fuel based power plants could reduce the cost of stand-alone solar thermal power stations, reduce CO2 emissions and produce experience necessary to operate a full scale solar thermal electricity generation facility.
文摘This study examines the state of liveability in emerging urban centers of Ago-lwoye and Ijebu-Igbo in Ogun State. The study used primary and secondary data. Both descriptive and inferential statistical techniques were used to analyze research questions that bother on urban liveability. Results of the analyses show that in the two urban centres the following are not in very good condition： neighborhood road quality, garbage collection, state of cleanliness, street light, state of security, pollution, water supply, drainage system, and power supply. Most of the residents are not satisfied with the state of liveability in Ago-Iwoye and Ijebu-Igbo towns. Statistical test result shows among others that there is no significant variation in the level of urban dwellers＇ satisfaction with their neighbourhood condition. In order to improve urban liveability in the two urban centres, government should provide all necessary infrastructural facilities and services. While roads are to be improved and maintained, electricity and water supply should be provided. Community associations should also be encouraged. They should be more involved in activities that will improve liveability in the urban centre. They should constitute themselves as pressure groups, working on the government to improve the liveability of the urban centre.
文摘The demand for energy, water and food will continuously increase, as the prediction states that 2.5 billion people will be added to the world population by 2050, representing not only an increase in the consumption but also more waste production, greenhouse gas （GHG） emissions and depletion of natural resources. Taking into account that renewable sources of energy can help to overcome these challenges and diversify the energy matrix in the countries, this paper aims at analyzing the biogas potential in Brazil and the United States, especially in the livestock sector, and its benefits in the environmental, social and economic aspects. Both countries are among the top five countries globally in terms of water availability, energy consumption and food production. Until 2050, the world consumption of meat will have a significant increase： 206% of poultry meat, 56% of pork meat and 47% of beef meat, augmenting the need for sustainable management of waste and manure. This scenario can become a sustainable opportunity for biogas implementation, which provides multiple economic, environmental and social benefits for farmers, businesses and communities, including production of electrical, thermal and vehicular energy, production of high-quality biofertilizer, reduction of ground and surface water pollution and reduction of GHG emissions, and foments new income for the farmers, among others. A new concept is presented in this article to make biogas systems feasible, i.e., biogas condominiums, as small and medium-scale farms by themselves usually would not be able to afford the investments. This arrangement can bring benefits for the whole biogas supply chain that includes farmers, agroindustry, providers and local community.
