This technical paper considers the vessels used today in the sea and marine industries to provide somewhere to stay for people in semi-permanent accommodation at sea： the floating hotels. These structures have mainly...This technical paper considers the vessels used today in the sea and marine industries to provide somewhere to stay for people in semi-permanent accommodation at sea： the floating hotels. These structures have mainly been developed to hold the activities of the offshore oil and gas industry, although in coastal areas they are widely used for several purposes, mainly as commercial hotels, but with a quite different philosophy of use. The purpose of this paper is to show how the term flotel is used to denominate very different craft that, while serving the same purpose, have a totally different configuration according to the place where they are located： in protected waters in coastal areas, in benign and shallow waters of the open ocean or in the harsh environments of deep waters, etc..展开更多
This article deals with the energy efficiency of textile weaving machines. A method based on exergy balances has been developed at the Institute for Textile Technology RWTH Aachen University （ITA）, Aachen, Germany i...This article deals with the energy efficiency of textile weaving machines. A method based on exergy balances has been developed at the Institute for Textile Technology RWTH Aachen University （ITA）, Aachen, Germany in order to improve energy efficiency textile machines. The relay nozzles of the air-jet weaving technology need up to 80% of the energy of the weaving machine. At ITA, a new nozzle concept was developed. The developed geometry is a so called High-Volume-Low-Pressure nozzle （HVLP nozzle）, based on convergent nozzle aerodynamic theory. With this concept, energy savings up to 30% are possible.展开更多
Not only being abundant in resources, natural gas also helps power grids consume wind energy, solar energy and etc. The promotion of natu ral gas is an essential zoay to facilitate the development of nezo energy and c...Not only being abundant in resources, natural gas also helps power grids consume wind energy, solar energy and etc. The promotion of natu ral gas is an essential zoay to facilitate the development of nezo energy and complete the transition to an energy system where the renewable energy is dominant. The operation of energy Internet with a concept of equal, open, cooperative and sharing, and the optimization of a combined energy of gas, electricity, heating and cooling, could significantly improve the energy efficiency. Meanwhile, the development of energy lnternet technology will subvert the existing division of energy industry, and generate new commercial formats with features of highly openness. It will also subvert some existing market rules, change the governance methods, generate renovations in organizations, business models and government management methods, thus requires further revolution in energy industry. In order to promote the rapid and healthy development of ＂lnternet plus＂ natural gas industry, a series of policies and precautions are needed to be inhvduced and improved.展开更多
The velocity of an over-burst coal seam based on laboratory test results. This seam is about 1/3 compared to a normal coal can be considered as a basis to confirm the area of coal and gas burst by seismic exploration ...The velocity of an over-burst coal seam based on laboratory test results. This seam is about 1/3 compared to a normal coal can be considered as a basis to confirm the area of coal and gas burst by seismic exploration technique. Similarly, the simulation result of the theoretical seismic model shows that there is obvious distinction between over-burst coal and normal coal based on the coal reflection＇s travel-time, energy and frequency. The results from the actual seismic data acquired in the coal and gas over-burst cases is consistent with that of the laboratory and seismic modeling; that is, in the coal and gas burst region, seismic reflection travel time is delayed, seismic amplitude is weakened and seismic frequency is reduced. Therefore, it can be concluded that seismic exploration tech- nique is promising for use in distinguishing coal and gas over-burst regions based on the variation of seismic reflection travel time, amplitude and frequency.展开更多
This paper describes an efficient and appropriate use of biomass in Latvian conditions as well as analyzing the current situation, leading to recommendations for rational use of biomass and the full implementation of ...This paper describes an efficient and appropriate use of biomass in Latvian conditions as well as analyzing the current situation, leading to recommendations for rational use of biomass and the full implementation of the Latvian energy sector. In recent year＇s, Latvian energy sector development analysis shows, that there is a positive tendency--an increase of local and renewable energy share of energy balance. The paper will be identified for future development opporttmities, and will undertake an analysis of renewable energy consumption forecasting in accordance with the renewable energy potential assessment, taking into account the effective use of innovative technologies and ecological aspects of the energy sector. Increasing use of biomass for district heating （and cogeneration）, also increase the efficient use ofbiomass in cost efficiency and reducing of GHG emissions. Efficient use of biomass analyzed in the paper, taking into account technical, legislative, institutional/organizational, economic, information and financial aspects. Promoting of the efficient use of biomass will increase national energy independence.展开更多
文摘This technical paper considers the vessels used today in the sea and marine industries to provide somewhere to stay for people in semi-permanent accommodation at sea： the floating hotels. These structures have mainly been developed to hold the activities of the offshore oil and gas industry, although in coastal areas they are widely used for several purposes, mainly as commercial hotels, but with a quite different philosophy of use. The purpose of this paper is to show how the term flotel is used to denominate very different craft that, while serving the same purpose, have a totally different configuration according to the place where they are located： in protected waters in coastal areas, in benign and shallow waters of the open ocean or in the harsh environments of deep waters, etc..
文摘This article deals with the energy efficiency of textile weaving machines. A method based on exergy balances has been developed at the Institute for Textile Technology RWTH Aachen University （ITA）, Aachen, Germany in order to improve energy efficiency textile machines. The relay nozzles of the air-jet weaving technology need up to 80% of the energy of the weaving machine. At ITA, a new nozzle concept was developed. The developed geometry is a so called High-Volume-Low-Pressure nozzle （HVLP nozzle）, based on convergent nozzle aerodynamic theory. With this concept, energy savings up to 30% are possible.
文摘Not only being abundant in resources, natural gas also helps power grids consume wind energy, solar energy and etc. The promotion of natu ral gas is an essential zoay to facilitate the development of nezo energy and complete the transition to an energy system where the renewable energy is dominant. The operation of energy Internet with a concept of equal, open, cooperative and sharing, and the optimization of a combined energy of gas, electricity, heating and cooling, could significantly improve the energy efficiency. Meanwhile, the development of energy lnternet technology will subvert the existing division of energy industry, and generate new commercial formats with features of highly openness. It will also subvert some existing market rules, change the governance methods, generate renovations in organizations, business models and government management methods, thus requires further revolution in energy industry. In order to promote the rapid and healthy development of ＂lnternet plus＂ natural gas industry, a series of policies and precautions are needed to be inhvduced and improved.
基金Supported by the Key Program of National Basic Research Program(973)of China(2006CB202208)the CBM Important Project of 2008ZX05040-003 in China
文摘The velocity of an over-burst coal seam based on laboratory test results. This seam is about 1/3 compared to a normal coal can be considered as a basis to confirm the area of coal and gas burst by seismic exploration technique. Similarly, the simulation result of the theoretical seismic model shows that there is obvious distinction between over-burst coal and normal coal based on the coal reflection＇s travel-time, energy and frequency. The results from the actual seismic data acquired in the coal and gas over-burst cases is consistent with that of the laboratory and seismic modeling; that is, in the coal and gas burst region, seismic reflection travel time is delayed, seismic amplitude is weakened and seismic frequency is reduced. Therefore, it can be concluded that seismic exploration tech- nique is promising for use in distinguishing coal and gas over-burst regions based on the variation of seismic reflection travel time, amplitude and frequency.
文摘This paper describes an efficient and appropriate use of biomass in Latvian conditions as well as analyzing the current situation, leading to recommendations for rational use of biomass and the full implementation of the Latvian energy sector. In recent year＇s, Latvian energy sector development analysis shows, that there is a positive tendency--an increase of local and renewable energy share of energy balance. The paper will be identified for future development opporttmities, and will undertake an analysis of renewable energy consumption forecasting in accordance with the renewable energy potential assessment, taking into account the effective use of innovative technologies and ecological aspects of the energy sector. Increasing use of biomass for district heating （and cogeneration）, also increase the efficient use ofbiomass in cost efficiency and reducing of GHG emissions. Efficient use of biomass analyzed in the paper, taking into account technical, legislative, institutional/organizational, economic, information and financial aspects. Promoting of the efficient use of biomass will increase national energy independence.
