共查询到17条相似文献,搜索用时 163 毫秒
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针对中小型燃煤热电厂存在的问题,提出将燃煤热电系统改造成燃气-蒸汽联合循环发电系统.探讨改造方案、设备配置原则、环境效益.结合算例,对燃气-蒸汽联合循环发电系统的热经济性进行了分析. 相似文献
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一般之汽电共生设备常因工厂用汽与用电之不易同步配合,以致相互受牵制,无法发挥最高之经济效益。程氏循环利用燃气轮之高温排气以废热锅炉产生蒸汽,当蒸汽用量低时,可将多余之蒸汽回注入燃气轮,提高燃气轮之输出,维持最大发电量,蒸汽需求量超过发电量时,则利用风道中之后燃烧器提高锅炉之蒸汽产生量。使汽电共生之效率可以提高至65%以上。 相似文献
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燃气-蒸汽联合循环发电项目在济钢成功运用 总被引:2,自引:0,他引:2
通过介绍燃气-蒸汽联合循环发电的原理,济钢实施燃气蒸汽联合循环的必然性,以及其实施的特点及效果,阐述了该项目在钢铁企业具有良好的推广性. 相似文献
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论燃气-蒸汽联合循环热、冷、电联供在我国的发展 总被引:1,自引:0,他引:1
总结数十年来我国热电联产建设的经验 ,结合多年从事燃气 蒸汽联合循环 (热 )电厂设计心得 ,在肯定我国热电联产成绩基础上 ,指出以往热电联产建设上的存在问题和改进意见 ,并积极建议发展我国燃气 蒸汽联合循环热、冷、电联供的思路。 相似文献
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结合工程实例,对间接连接、直接连接、混水连接供热系统,在分别以燃气轮机、燃气-蒸汽联合循环机组、燃煤汽轮机的热电联产系统作为热源,4种调节方式下,对热源供热量的调节过程及室内温度平均波动幅度的变化进行了研究。燃气轮机热电联产系统的供热量调节能力很强,常导致室内温度平均波动幅度过高。燃气-蒸汽联合循环机组热电联产系统的供热量调节能力相对较强,对于某些热惯性较强的热网,利用热网热惯性可将室内温度平均波动幅度控制在一定的范围内。燃煤汽轮机热电联产系统的供热量调节能力有限,可将室内温度平均波动幅度控制在1.5℃以下。 相似文献
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《国际自然能源杂志》2012,33(1):50-57
ABSTRACTCombined power plants are among the most attractive options to optimally utilise conventional fuel energy with respect to energy conversion and the environment. In the present study, a dual-pressure heat recovery steam generator (HRSG) used in a gas/steam combined cycle power plant is investigated. This paper presents exergy and economic analysis of a dual-pressure HRSG. The parameters used for the investigation of the exergo-economic study are pinch point, fuel price, cost of exergy losses, gas turbine inlet temperature and cycle pressure ratio. A parametric study shows that the considered parameters have a huge impact on the total annual cost per unit exergy of steam produced in the HRSG. It is seen that best exergo-economic conditions are obtained at the pinch point value of 10?K to get the total annual cost per unit exergy of steam produced to be the minimum. 相似文献
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C. O. C. Oko 《国际自然能源杂志》2020,41(3):334-347
ABSTRACTThis paper presents the thermo-economic analysis of a waste-to-energy integrated multi-generation power plant using the municipal solid waste generated in Onitsha, Nigeria at latitude 6°9′N and longitude 6°49′E. The chemical energy in the municipal solid waste was converted to that of a synthetic gas, and subsequently converted into electrical energy in an integrated multi-generation power plant composed of gas turbine, steam turbine, micro turbine and absorption refrigeration cycles. The analysis was implemented in the HYSYS, EES, MATLAB and Microsoft environments. Results showed that the municipal solid waste had a power plant capacity of 168?MW, exergetic efficiency of 51%, life cycle cost of $143 million, breakeven point of 9 years, and a unit cost of electricity of $0.01/kWh. Compared to the combined power plant of similar capacity, the life cycle cost savings and reduction in the flue gas exit stack temperature were $49.07 million and 73°C, respectively. 相似文献
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Chih Wu 《国际自然能源杂志》2013,34(2):77-82
The purpose of this paper is to define a finite-time closed Brayton cycle and apply it to an indirect gas-cooled nuclear reactor plant for its optimization. Practical engineering heat engine power optimization usually takes the form of determining minimum heat exchanger area per unit net power output or minimum cost per unit power output, rather than determining the maximum cycle efficiency. The objective function of the optimization described in this paper is specific power, power output per total heat exchanger surface area. The specific power output of a real indirect gas-cooled nuclear reactor plant coupled with its heat source and sink is analyzed. It is found that there is an upper bound on the specific power output of the nuclear power plant. This bound can guide the evaluation of existing real plants or influence design of future power plants. 相似文献
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在分析系统成本构成的基础上,运用热经济系数评价模型对系统的设备投资成本、运行成本和燃料成本进行了计算,分析了设备投资成本、燃料成本和运行时间对系统热经济系数的影响。结果显示,燃料成本和运行时间对系统的热经济系数影响较显著,降低燃料单价和增加系统每天运行时间会减小系统的热经济性系数。 相似文献
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某钢铁企业调整煤气结构,建立煤气自动监控系统,提高转炉煤气回收量;采用煤气干法除尘和电除尘技术,提高煤气净化质量;采用高炉炉顶煤气余压回收透平发电实现了煤气能量的有效转换;采用燃气-蒸汽联合循环发电减少了煤气放散,实现了企业用电的部分自给。 相似文献
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建立利用热网蓄热以促进风电消纳的热电联合优化运行模型,分析热源循环泵流量对热电联供系统运行经济性的影响。案例分析结果表明,循环泵日电费随相对流量减小而降低。相对流量87%~100%范围内,目标函数(热电机组的日运行费用、日市电费、日弃风罚款之和最小)不变。当相对流量降至86%后,目标函数不降反升,且增大幅度大于循环泵日电费降低幅度。受供水温度及供回水温差的限制,随着相对流量减小,日间热电机组制热功率受到限制。为了满足热电联合优化运行模型热平衡条件(总供热量等于总耗热量),夜间热电机组制热功率无法降低,热电机组发电功率居高不下,导致风电消纳受限,弃风电量增大。日弃风罚款随之增加,最终导致目标函数升高。相对流量为87%时,热电联供系统的日运行费用最低。 相似文献