Results 1 - 10 of 837
Results 1 - 10 of 837. Search took: 0.021 seconds
|Sort by: date | relevance|
[en] A brief overview is given of developments in the prices for natural gas and electricity. The increasing demand for energy in India and China effects the developments in the market for energy
[nl]Een kort overzicht wordt gegeven van de ontwikkelingen in de prijzen voor aardgas en elektriciteit. De grote vraag naar energie in China en India bepalen mede de ontwikkelingen in de markt voor energie
[en] No single resource can meet the world energy demand. What is under consideration is the possible contribution of geothermal energy in the future. According to World Energy Council (WEC) perspectives, by 2020 the new energy resources will contribute 170 to 365 MTOE, of which the share of hydropower will be very significant. This is a realistic view based on the actual state of the market. This paper reports on the competitive advantages and economics of geothermal energy development
[en] Conclusions: ♦ SMR CHP has significant role in heat demand provision considering low emissions scenarios; ♦ SMR only electricity are not built; ♦ Only SMR CHP are ‘interesting’ to PLEXOS model; ♦ Due to high variability of heat demand (season but also during week) SMR CHP has rather low heat CF; ♦ SMR CHPs are superior even to Biomas CHP plants in this model.
[en] The work here described is part of the PhD thesis that is being developed with the goal of studying the hygrothermal behavior and energy performance of several dwellings in the Dry-Mediterranean Climate. In this phase, after an annual campaign of in situ experimental tests, research now focuses on the assessment and quantification of the influence of local climate conditions and thermal values of rammed earth walls on energy demands of common traditional buildings in La Mancha. To achieve it, energy simulations have been performed on two buildings, with three goals. 1) Evaluation of construction systems which include walls with a high thermal inertia in comparison with contemporary systems. 2) Study the influence of theoretical values of walls and user activity taken from nominal data in the Catalogue of Building Components (CEC), that can be found in the Technical Building Code (CTE), and compare it with the use of actual in situ data and surveys; 3) Contrast between using standard and actual climate data recorded with a private weather station placed in the same location as the studied buildings. Research like , ,  also execute energy simulations of rammed earth buildings and components but in a different climate, while other papers like , , ,  also compare in situ values with nominal data but the main material of the studied buildings is not rammed In conclusion, results show that: 1) Energy demands of spaces where the theoretical transmittance value (or U-value) has been used are 52-55% higher in winter and 9-15% higher in summer than those where the in situ value has been used. 2) The use of theoretical information against the use of actual surveys about user activity can generate 12-26% difference in energy demands. 3) On the contrary, the use of available climate data measured at nearby locations would produce lower energy demands than using values recorded in the same location as the buildings, being up to 64% lower in winter months and up to 100% lower in summer months. Future research should be performed using combined heat and moisture models (HAMT in Energy Plus), as several studies have demonstrated that there is and important relation between thermal values and water content of the material [earth.
[en] The passive design represents a solution to the energy issue in dwellings. We should highlight the existence of several elements that take belong to the field of passive design. This work aims to study de relation between the implementation of a passive design plus an active- passive design (use of renewable energy) to apply on a dwelling and the resulting energy saving. The object of study is a 100 sq. meter dwelling placed in the top floor of a seven story building in Villaverde (Madrid). To begin Design Builder software  was used, that reaches just up to energy consumption issues. In order to know the contributions about energy saving, a comparative analysis between both (original and modified) Design Builder models. 3D models in Revit and SketchUp were done in order to make a preliminary analysis. Then a passive and an active- passive designs were chosen and keeping in mind the features of the base dwelling, using Design Builder software, for a first approach and analysis of the original model and the proposed one. At the calculation phase original model’s energy requirements were observed in order to be later compared to those of the modified model...
[en] It wasn't so long ago that the political events in the Persian Gulf threatened global energy supply and showed the vulnerability of global economies to the interruptions of foreign oil imports. Today, with increasing global environmental concerns associated with the use of fossil fuels, there is renewed interest in the nuclear energy option. The fast economic growth currently experienced in the Asia Pacific region is expected to drive electrical demands in an unprecedented pace. Current forecast of the world's total uncommitted electrical needs exceed 1,100 GWe over the next 10-15 years. In the US, the excess of electrical generating capacity which has existed for the past 15 years is coming to an end, and as we approach the 21st century, an estimated 200+ GWe of new generating capacity will be needed in the next 15 years. This paper describes GE's advanced boiling water reactor programs aimed at providing a new generation of nuclear energy plants to provide safe, clean, reliable, and economical electricity to the world's utilities as we enter the 21st century. (author)
[en] Portland cement was first produced in Indonesia by Semen Padang West Sumatra in 1913, followed by Semen Gresik East Java in 1957 and then Semen Tonasa South Sulawesi in 1968. These 3 cement plants commenced their production with wet process which consumed a large amount of fuel, as a part of this fuel is used for drying the moisture in the slurry feed. This paper reports on the fuels used n the cement industry (most notably coal), and improvements made within the industry to increase energy efficiency and environmental quality
[en] All energetic aspects collected within the main topic 'Energy and life' are gathered in 14 volumes. Environmental questions were devoted special attention because of public concern. The congress resolved to promote clean technologies and renewable energies with less environmental impact but without forgetting profitability. Experts in energetic topics attended the Congress
[en] This book is about following topics: access of primary sources, useful in a technological way, efficient use, environment, social incidence in Uruguay, Prospective studies by sectors,and Energetic matrix.