共查询到19条相似文献,搜索用时 62 毫秒
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在工业生产过程中因流化床锅炉自身具有高效、发电率强、燃料灵活性、低污染排放等优点,所以大部分工厂均采用循环流化床锅炉技术进行工艺生产加工.本文主要围绕着循环流化床锅炉技术的特点及存在的问题进行分析,并采取了一定的措施. 相似文献
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近年来循环流化床锅炉因其煤种适应范围广、经济、环保而得到快速的发展,但是循环流化床锅炉机组的厂用电率、供电煤耗等经济指标高于一般煤粉炉。本文主要分析了循环流化床锅炉通过改造设备、调整运行方法等手段来提高循环流化床锅炉机组的效率。 相似文献
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锅炉是国家重点耗能设备之一。文章分析了现阶段锅炉燃烧系统能耗大的主要原因.介绍了循环流化床在锅炉燃烧系统中如何实现节能降耗的原理。 相似文献
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叙述了循环流化床锅炉的优缺点,指出除尘器落下的飞灰是造成循环流化床锅炉降低热效率的主要原因.通过试验得出,降低飞灰可燃物含量和排烟热损失是实现循环流化床锅炉节能的途径. 相似文献
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We have been developing technologies for energy saving in the residential sector. Recently, we have been concentrating our resources specifically into the development of polymer electrolyte fuel cell (PEFC) cogeneration systems. The system has excellent energy saving characteristics. However, the total amount of energy saved depends on how the system is operated. The characteristics of residential energy consumption are more complicated than in industrial use and depend on individual living patterns. It is therefore not easy to develop a control method for a system that can be generally applied across a wide variety of residential use.In this paper, we propose a system configuration and operation planning method developed for a residential PEFC cogeneration system. Using an operation planning method we developed, we demonstrate that our system provides higher energy savings than the conventional method. The energy saving rates are 15.9% under a large heat demand, 18.4% under a relatively high electrical demand and low heat demand, 1.3% under relative low electrical and heat demands. 相似文献
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《Energy》2006,31(14):2699-2709
Cogeneration plants for simultaneous production of water and electricity are widely used in the Arabian Gulf region. They have proven to be more thermodynamically efficient and economically feasible than single purpose power generation and water production plants. Yet, there is no standard or universally applied methodology for determining unit cost of electric power generation and desalinated water production by dual purpose plants.A comprehensive literature survey to critically assess and evaluate different methods for cost application in power/water cogeneration plants is reported in this paper. Based on this analysis, an in-depth thermoeconomic study is carried out on a selected power/water cogeneration plant that employs a regenerative Rankine cycle. The system incorporates a boiler, back pressure turbine (supplying steam to two MSF distillers), a deaerator and two feed water heaters. The turbine generation is rated at 118 MW, while MSF distiller is rated at 7.7 MIGD at a top brine temperature of 105 °C. An appropriate costing procedure based on the available energy accounting method which divides benefits of the cogeneration configuration equitably between electricity generation and water production is used to determine the unit costs of electricity and water. Capital charges of common equipment such as the boiler, deaerator and feed water heaters as well as boiler fuel costs are distributed between power generated and desalinated water according to available energy consumption of the major subsystems. A detailed sensitivity analysis was performed to examine the impact of the variation of fuel cost, load and availability factors in addition to capital recovery factor on electricity and water production costs. 相似文献
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综合评价了国内5台典型的600 MW亚临界机组,并以其中一台机组为案例进行了节能分析。该机组通过对汽轮机的一系列节能治理,机组热耗率降低106 kJ?kWh-1,供电煤耗下降4.1 g?kWh-1;对锅炉鼓、引风机和脱硫系统相关辅机的改造共降低厂用电率0.26%,供电煤耗下降0.86 g?kWh-1。此外,分析认为消除汽机低压旁路阀泄漏及降低锅炉飞灰含碳量,供电煤耗还有降低1.3 g?kWh-1的潜力。 相似文献
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In the current study, a solar tower–based energy system integrated with a thermal energy storage option is offered to supply both the electricity and freshwater through distillation and reverse osmosis technologies. A high‐temperature thermal energy storage subsystem using molten salt is considered for the effective and efficient operation of the integrated system. The molten salt is heated up to 565°C through passing the solar tower. The thermal energy storage tanks are designed to store heat up to 12 hours. The temperature variations in the storage tanks are studied and compared accordingly for evaluation. The effect of operating temperatures on the freshwater production and overall system efficiency is determined. About 24.46 MW electricity is generated in the steam turbine under sunny conditions. Furthermore, the storage subsystem stores heat during sunny hours to utilize later in cloudy hours and night time. The produced power decreases to 20.17 MW in discharging hours due to temperature decrease in the tank. The electricity generated by the system is then used to produce freshwater through the reverse osmosis units and also to supply electricity for the residential use. A total flowrate of 240.02 kg/s freshwater is obtained by distillation and reverse osmosis subsystems. 相似文献
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Among the various aspects that have to be analysed in a cogeneration and combined cycle plant design, the exhaust gas stack design can represent a critical aspect, in particular when a by-pass stack, which allows the modulation of heat-to-power generation, is present, since it may influence the entire system working condition. To properly take into account the large number of the different requirements which enter in an exhaust gas system design, a multidisciplinary analysis involving numerical integrated approaches can be adopted in order to obtain an optimally designed stack system. In this paper, the design of the exhaust gas system in a cogeneration plant is analysed. The design is performed numerically through a three-dimensional integrated numerical code. Different design solutions are simulated and the results discussed in detail. 相似文献