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The following topics are dealt with: Power system monitoring and optimization; power system management and power transmission; power generation and power system planning; power generation-thermal power, wind power and solar power; environment protection; power transmission and electromagnetic analysis; power system security and monitoring; energy efficiency and environment-friendly technologies.
Though the combination energy-saving measure for mechanical oil production well plays a very important role in improving the whole economic efficiency of the oil field, it does not reach to the optimal saving status. Except for the increasing inputs of saving measure, optimizing of the combination of kinds of saving equipment and technology is needed for enhancing the economic efficiency of the combination...
From the angle of the traditional energy assessment, the fuzzy probability theory is applied to appraise the green energy. Firstly, the influential factors of the green energy assessment for energy project are analyzed according to China's national conditions. The factors of energy project are divided into four parts, such as absolute cost, ecological harmony, energy security and sustainability. The...
Eupatorium adenophorum Spreng can potentially be utilized in several bioenergy pathways. When pretreated with microbial inoculum, it can be used as biogas fermentation material, which could increase the biogas production velocity. Eupatorium adenophorum Spreng is a promising potential biogas feedstock, whose rate of gas generation is 180 (m3-t_1TS) and fuel conversion efficiency is 12.37% at 30°C...
According to the basic law of energy conservation and conversion, the energy consumption evaluation indexes of two basic research objects in oil-gas gathering and transferring system, i.e. stations and pipelines, are established. On the basis of that, the energy consumption evaluation indexes for the whole system are obtained through mean weighted method. Then heat loss rate and pressure loss rate...
Energy conservation has been taken as basic state policy in China for more than twenty years and China achieves great success of annual energy saving. In 2006 China Central Government firstly set up a binding target of reducing GDP energy intensity in its 11th Five-Year-Plan. With two decades of continuous efforts, for the recent 6 years from 2004, China has created an administrative oriented policy...
Monitoring the loss of distribution transformer is very significant for the energy conservation and economic operation of transformer. Off-line approach is the main way used in loss detection in China. In this paper, an on-line detecting method for transformer loss is proposed. The equivalent circuit of transformer is created. Based on the structure and working principle of transformer, the formulas...
This paper presents a new scheme, which applies wind energy and hydropower to buildings to construct a kind of new low-carbon and energy-saving toilets. Natural wind can be utilized to emit the exhaust in toilets of buildings, while sewage can be used to generate electricity for sound-control lights in corridors. In this way, electric energy can be saved effectively and a new low-carbon, energy-saving...
According to the basic formula of central heating system, the running adjustment formular is derived concerning it. On the basis of the formula, the running adjustment curve is obtained by using origin when adopting the different ways of regulation on both sides of heat exchanger. Finally with the outdoor temperature, it is concluded that the adjusting method of the variable flow and temperature of...
There are some basic issues and preconditions easy to be neglected which will affect the establishment of energy stratagem when analyzing the energy situation. The first is overrating the potentials of energy saving and energy consumption reducing. The second is the limited recognitions of the environment carrying capacity. The third is ignoring the huge demand for the fossil energy in the countryside...
Developing Countries, (DCs), generally suffer from, sometimes extreme shortage and unavailability of both commercial fuel and non commercial fuel for their energy need. Those off-grid residential houses and community clinics are primarily affected. The main reason can be linked to the ever increasing price of commercial fuel. Since majority of the people living in far distant locations to the electric...
In order to give some suggestions for energy conservation rebuilding, comparison analysis was carried out on the coal-fired industry boiler and steam kettle system. Three schemes of steam water reclaim from the steam kettle to the coal fired industrial boiler were put forward. The first scheme adopted a heat exchanger to reclaim the heat released from the condensate water and hot up the feed water...
The space moisture load is mainly from human, open wide water, and plants in office buildings. Based on the pollutants general ventilation equation and energy conservation, considers indoor temperature and humidity ratio dynamic formula in fresh air start-up stage. According to the weather parameter of Jinan, calculated fresh air pre-dehumidification time, considers when fresh air is 1.3 times of...
AC gliding arc reactor producing syngas (H2+CO) for partial oxidation of methane in an atmospheric gliding arc discharge has been designed and constructed. In this case, no catalysts are used to assist reforming; the plasmas play a role as catalyst and provide the energy for such reactions. The oxygen in the air is used for the partial oxidation of methane. The methane conversion and the energy efficiency...
For energy-saving or water-saving consideration, performance optimization of air-cooled condenser is important. The optimization calculation results for the cool-end of a 600MW SC air cooling unit show that cool-end optimization has economic benefits for SC and USC air cooling units. Based on the same idea, the idea of cool-end optimization method of USC air cooling units with 1000MW is suggested...
This paper introduced a newly developed coal flotation collector EDO and its flotation characteristics for five different coals. EDO is an emulsion composed of 27% diesel oil, 70% water and 3% surfactants. The surfactant PGS is synthesized with oil which is environmental favorable and reproducible. Compared flotation experiments show that, at the same dosage, EDO give 2-7% recovery promotion than...
Based on the background of the low-carbon economy, the environmental index is brought into the evaluation system of Balance Score Card, and each index is decided to be important or less important through the AHP method.The fuzzy assessment method is used to form the evaluation model for enterprise performance, which is tested and studied. The improvement of this method not only meets the demands of...
This paper empirically analyzes the effect of import trade spillover on the industrial energy consumption intensity, based on a panel of 32 industrial sectors for 1998-2007.The results show that research and development spillovers embodied in imports have indeed contributed to a decrease of industrial energy intensity both in high and low energy consumption intensity group in China. This paper will...
A transient flow model for heated oil transportation pipeline is built with application of continuity, momentum and energy conservation equations of pipe flow. The transient friction term of the model incorporates both of the steady and unsteady friction and the Brunone-Vitkovsky model is selected to compute unsteady flow friction in pipeline. The method of characteristic, finite-difference scheme...
Based on the principles of mass, energy conservation and state equation for ideal gas, operation performance of two-stage thermal energy storage system of the first 1MW solar tower power plant in China was calculated and analyzed using numerical simulation method. The results indicated that the pressure of nitrogen in oil tanks slightly changes as a function of temperature and volume variation, thus...
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