共查询到18条相似文献,搜索用时 203 毫秒
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与常规能源发电相比,目前光伏发电电价还不具备竞争优势,制定一个合理的上网电价是推动我国光伏产业健康发展的关键。上网电价取决于光伏电站的建设和运营成本,而影响光伏电站投资成本的因素很多,如太阳能辐射量、器件和设备价格、电站规模、项目融资方式、贷款利率、政府补贴额定等,很难制定出统一的上网电价。本文从具体实例出发,在云南某地拟建一个10MW的单晶硅并网光伏电站,将辐射量、设备价格、电站规模及财务参数等因素都具体化,从电站的建设到运行,考虑所有影响投资成本的因素来计算建设成本。然后利用财务分析中的净现值法、内涵报酬率法、项目回收期法三种方法分析计算相应的较为合理的光伏发电上网电价,比较三种方法得到的结果,讨论不同因素对电价的影响效果。 相似文献
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以30MW机组配置的棉秸秆直燃发电项目为例进行经济分析。结合当前我国关于生物质发电的政策,分析和讨论了上网电价和秸秆燃料成本2个因素对投资回收期(PBP)、净现值(NPv)和内部收益率(IRR)的影响,对秸秆发电项目的发展提出了相关建议。 相似文献
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光伏发电成本的数学模型分析 总被引:1,自引:0,他引:1
光伏发电从2005年进入产业化以来,成本不断降低.目前,我国发改委制定了1元/kWh的光伏发电上网标杆电价.但许多投资者对于光伏发电的成本却感到难以分析,不敢贸然投资.本文给出了光伏发电成本的数学分析模型,讨论了影响光伏成本电价的因素,如装机成本、日照时间、贷款状况、预期的投资回收期以及运营费用等.并根据该模型对现阶段光伏发电的投资效益进行了投资分析.计算结果表明,在我国西北地区,按照1元/kWh的上网电价,目前投资光伏电站的投资回收期为10年. 相似文献
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秸秆直接燃烧供热发电项目上网电价初步测算 总被引:12,自引:1,他引:12
研究确定生物质能源供热发电上网电价,对于促进中国秸秆直接燃烧供热发电产业的发展,具有重要作用。为了探索中国秸杆直燃供热发电上网电价及其变化规律,在秸秆资源可供应性调查基础上,报告测箅了当前中国秸秆直燃供热发电的上网电价,分析研究了电价构成、影响因素及其变化趋势,预测2005~2020年中国秸秆资源可供应量、供热发电规模、上网电量,并提出与中国秸秆直燃供热发电上网电价有关的结论。这些对十关心中国生物质能源发展的各级政府和国际组织、企业、机构及专家学者有很好的各考价值。 相似文献
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利用净现值法对荒漠生物质气化发电进行了经济评价,通过评价可以得出以下结论:生物质气化发电的规模对固定成本和运营成本有重要的影响,装机容量为3000kW的电厂的单位固定成本比200kW的电厂固定成本下降26.67%,运营成本下降52.93%;销售电价是影响财务内部收益率最敏感的因素之一,如提高上网电价可更有效增加项目的经济效益;生物质的收购价格对净现值的影响非常显著,净现值与生物质价格成反比关系;当生物质价格高于200元/t,内部收益率为7%时,净现值小于零,生物质发电将失去其竞争力。在甘肃地区上网电价为0.33元的前提下,建设1000kW以上的生物质气化发电电厂,无需政府补贴,仍具有可行性。 相似文献
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生物质气化发电项目经济性分析 总被引:6,自引:0,他引:6
对2MW和6MW生物质气化发电站项目的经济性进行了分析和比较.在目前的经济环境下,生物质气化发电的设备成本为5000~6500$/kW,上网电价在0.60~0.65$/kWh的条件下,项目投资回收期在6~8a之间.6MW规模电站的投资成本虽然比2MW的高,但采用了更先进的技术,系统效率提高、技术经济性较优.生物质单价和税率是影响生物质气化发电经济性的两个重要因素,发电成本、投资回收期和内部收益率等对这些因素非常敏感.生物质单价或税率提高,都会导致项目经济性降低,表现为发电成本增加、投资回收期增长和内部收益率下降. 相似文献
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在分析煤质变化对火电厂运营成本影响的基础上,提出了综合评价发电企业的复合燃煤使用成本计算模型.基于数值型模糊关联规则数据挖掘方法,确定了煤质特性与发电企业的燃煤装卸倒运成本、污染物排放成本、原煤采购成本、脱硫系统运行成本、辅机耗电成本及设备维护成本的关联关系,提出了一种基于数据挖掘技术的最经济煤种决策方法.以某电厂3年历史运行数据为基础,对4种预采购煤种的复合燃煤使用成本进行了比较分析,在高价优质煤与低价劣质煤之间确定了最经济煤种.结果表明:燃煤采购决策既需要考虑发电企业生产过程的多个环节,也需要考虑燃煤价格因素及燃煤的煤质因素.燃用便宜的劣质煤不一定比燃用价格较高的优质煤更合算,一味追求高品质的高价煤或低价格的劣质煤都是不可取的,煤种2为该厂的最经济煤种. 相似文献
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火力发电厂是一个复杂的热力系统,其运行经济性不仅取决于主机效率,同时还与热力系统中辅机的配置,运行方式和效率相关.除氧器是汽轮机发电机组回热系统中的一种重要的辅助设备,如何提高除氧器的经济性是一个综合性的问题,它体现在除氧器的设计、安装、运行、监督和保养等方面.文中主要介绍提高除氧器效率的相关途径,对除氧器最优经济运行具有一定的指导意义. 相似文献
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Zhen Wu Jing Yao Pengfei Zhu Fusheng Yang Xiangyu Meng Sandra Kurko Zaoxiao Zhang 《International Journal of Hydrogen Energy》2021,46(19):11183-11198
Advanced biogas power generation technology has been attracting attentions, which contributes to the waste disposal and the mitigation of greenhouse gas emissions. This work proposes and models a novel biogas-fed hybrid power generation system consisting of solid oxide fuel cell, water gas shift reaction, thermal swing adsorption and proton exchange membrane fuel cell (SOFC-WGS-TSA-PEMFC). The thermodynamic, exergetic, and thermo-economic analyses of this hybrid system for power generation were conducted to comprehensively evaluate its performance. It was found that the novel biogas-fed hybrid system has a gross energy conversion efficiency of 68.63% and exergy efficiency of 65.36%, indicating high efficiency for this kind of hybrid power technology. The market sensitivity analysis showed that the hybrid system also has a low sensitivity to market price fluctuation. Under the current subsidy level for the distributed biogas power plant, the levelized cost of energy can be lowered to 0.02942 $/kWh for a 1 MW scale system. Accordingly, the payback period and annual return on investment can reach 1.4 year and about 20%, respectively. These results reveal that the proposed hybrid system is promising and economically feasible as a distributed power plant, especially for the small power scale (no more than 2 MW). 相似文献
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This paper describes an analytical method for estimation of the economical feasibility of a project for wind energy utilization in Jordan. The method is applied to a windfarm and is based on the wind speed distribution at the site considered and on the financial parameters for the complete plant and its running costs. For this method, equations were derived to calculate the cost of a kWh generated by wind turbines with different characteristics as a function of the capital investment per kW installed capacity. The method was applied to the sites at which Royal Scientific Society performs wind speed measurements, and the results indicate that some of these sites are well suited for cost efficient generation of electricity by wind energy. The results also show that a wind tribine which is designed to have a relatively low rated speed has a wider range of economical operation than a wind turbine with a higher rated speed for the sites investigated assuming that the maximum rated power for all for the wind turbines is held constant. 相似文献
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高效低污染燃烧及气化技术的最新研究进展 总被引:4,自引:0,他引:4
根据参加2003日本神户国际动力工程会议的情况,着重评述了化石燃料低NOX燃烧、固体废弃物焚烧、煤及固体废弃物气化等技术领域的最新研究进展。目前烟气脱硝成为中国电厂技术革新的热点问题,炉内高效低NOX燃烧是一种适于我国国情的高效廉价的技术路线。热解和焚烧相结合的固体废弃物利用技术在日本已得到较为广泛的应用,但是它利用蒸汽轮机发电对于未来小型发电系统而言效率较低,而热解和气化相结合的固体废弃物利用技术是利用内燃机或燃气轮机发电,对于日处理废弃物量小于200t d的发电系统其效率较高,因此成为下一代分布式能源利用系统的良好选择。图7参1 相似文献
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新能源风、光发电工程中配置一定容量的储能系统,可以显著提高新能源发电的消纳水平。储能系统的容量/功率的优化配置可最大程度提高储能系统利用效率和经济性,同时将新能源风电、光伏的弃电率降低到设定的目标值。提出以全生命周期内储能系统净现值最大为目标,综合考虑储能系统全生命周期内投资、运维成本、购电成本、售电收入、充放电效率、荷电状态、储能电池寿命、弃电率等多种因素的储能系统容量/功率优化配置方法,并以青海某工程1 030 MW光伏阵列和250 MW风电场的运行数据为例,计算得到该新能源风电、光伏发电工程中净现值最大的储能系统容量/功率配置,使整个储能系统获得最优的经济性。 相似文献
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《International Journal of Hydrogen Energy》2023,48(36):13343-13361
This paper performs a thermo-economic assessment of a multi-generation system based on solar and wind renewable energy sources. This system works to generate power, freshwater, and hydrogen, which consists of the following parts: the solar collectors, Steam Rankine subsystem, Organic Rankine subsystem, desalination part, and hydrogen production and compression unit. Initially, the effects of variables including reference temperature, solar radiation intensity, wind speed, and solar cycle mass flow rate, which depend on weather conditions and affect the performance of the integrated system, were investigated. The thermodynamic analysis results showed that the overall study's exergy efficiency, the rate of hydrogen and freshwater production, and total cost rate are 33.3%, 7.92 kg/h, 1.6398 kg/s, and 61.28 $/h, respectively. Also, the net power generation rate in the Steam and Organic Rankine subsystems and wind turbines are 315 kW, 326.52 kW, and 226 kW, respectively. The main goal of this study is to minimize the total cost rate of the system and maximize the exergy efficiency and hydrogen and freshwater production rate of the total system. The results of optimization showed that the exergy efficiency value improved by 20.7%, the hydrogen production rate increased by 1%, and the total cost rate value declined by 2%. Moreover, the optimum point is similar to a region in Hormozgan province, Iran. So, this region is proposed for building the power plant. 相似文献