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地热采暖系统的技术经济评价方法 总被引:2,自引:0,他引:2
地热采暖工程的技术经济参数变化范围大,必须进行可行性研究和技术经济评价,评价方法应当合理、可信。本文提出用“单位供暖费用”做标准,以它最低为目标并以技术方案可行进行采暖方案的优选。 相似文献
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何乃军 《电网与水力发电进展》1997,(3)
水库移民安置规划是一项特殊形式的区域社会经济活动的布局,既关系到水利水电工程运用效益的充分发挥,更直接影响移民安置区域的经济发展和社会稳定。本文结合昌马水库移民安置规划,按照世行非自愿移民安置行动指南条款要求,对昌马水库移民安置综合经济评价做初步探讨。1工程概况甘肃省河西走廊疏勒河流域农业灌概暨移民安置开发项目,位于河西走廊酒泉地区玉门、安西两市县。项目总投资25.30亿元,其中:利用世行贷款1.50亿美元,其余为国内配套建设投资。工程实施后,可新增灌概面积5.46万ha,安置甘肃中,南部贫困地区自愿移民20… 相似文献
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为改善海上风电传统经济评价方法的局限性,根据气象条件等因素对海上风电运维的影响,分析计及气象可达性的海上风电运维流程,提出涵盖停机时间、损失电量、风电场可利用率和运维成本等经济评价指标计算方法,建立基于Anylogic平台的海上风电运维效益仿真模型,模拟风电机组、船舶、人员实时状态,统计各项经济评价指标,评估海上风电场运维经济效益。案例结果表明:所建立的效益仿真模型可模拟风电场的运维流程,并较为准确地推算出停机时间、损失电量、风电场可利用率及运维成本等关键指标,反映海上气象条件对风电场经济效应的影响,可为海上风电场的运行维护提供技术参考。 相似文献
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将层次分析法与模糊优选理论相结合,针对建筑设计方案特点,建立了分别以效益、费用为目标的AHP模型和相应的方案模糊优选模型。分别用AHP法得到的效益和费用两个指标体系的综合权重向量对相应的模糊优选模型加权,计算得到效益型方案相对大值隶属度向量和费用型方案相对大值隶属度向量,进而得到效益-费用比率向量,并依赖该比率向量中元素的大小对方案进行优劣选择。 相似文献
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指出了对新能源系统的评价要立足于其对全社会能源、环境、费用和效益的影响;讨论了新能源系统的社会能源评价、环境评价、经济评价的模型和方法。 相似文献
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防洪减灾中的多目标风险决策优化模型 总被引:7,自引:3,他引:4
讨论洪水预报、警报系统与防洪工程措施结合时,不同洪水预见期、预报精度、人们对警报的反应等情况下洪泛区内的洪灾损失计算。建立了防洪减灾中的多目标风险决策优化模型,该模型的目标函数选用投资费用最小化,防洪经济效益最大化及风险最小,其目的是充分利用水库防洪库容及其所有的防洪工程和非工程措施,尽可能地减轻洪泛区的洪灾损失。 相似文献
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经济评价中的敏感性分析 总被引:1,自引:0,他引:1
对一个工程进行经济评价,需要计算内部收益率IRR、净现值NPV、效益费用比BCR和静态投资回收年限Ts等指标.过去计算中,如操作不小心极易出错.为了解决这个问题,我们试用VB语言编制了一个界面清楚,操作简便的简易程序,解决了这个问题. 相似文献
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阐述了工艺方案技术经济评价的内涵,剖析了企业中开展工艺方案技术评价现状的原因,提出了有效开展评价的建议及优化的评价方法。运用优化的评价方法,拟定了BOSCH公司高压共轨系统(CRS)法兰配套项目工艺方案的技术经济评价的指标体系、构建层次分析结构模型,将工艺成本分析、经济生产批量计算结果等作为模型输入,通过矩阵运算和综合评价,实现了工艺方案择优。 相似文献
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彭穗萍 《电网与水力发电进展》2001,17(1):56-58
主要论述在确定下坂地水利枢纽工程建设规模中,如何充分发挥、利用已建水利水电工程的作用,通过流域内的径流水文补偿,跨流域的电力补偿及充分利用下游平原水库的反调节作用。为分析论证多年调节水库的建设规模与地区经济发展提供有益的思考方法。 相似文献
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Conventional benefit–cost analysis incorporates the normally reasonable assumption that the policy or project under examination is marginal. Among the assumptions this entails is that the policy or project is small, so the underlying growth rate of the economy does not change. However, this assumption may be inappropriate in some important circumstances, including in climate-change and energy policy. One example is global targets for carbon emissions, while another is a large renewable energy project in a small economy, such as a hydropower dam. This paper develops some theory on the evaluation of non-marginal projects, with empirical applications to climate change and energy. We examine the conditions under which evaluation of a non-marginal project using marginal methods may be wrong, and in our empirical examples we show that both qualitative and large quantitative errors are plausible. 相似文献
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《Energy Policy》2013
There are continuous debates around the question of whether CDM really contributes to sustainable development (SD) in host countries. Employment impact is an essential indicator of SD. Based on an input-out approach this research builds a quantitative assessment model to evaluate the employment impacts of CDM. Both direct and indirect jobs creation and job losses of CDM projects in the power sector registered by the end of 2011 are calculated by project types and power grids where the project is located. Results of this study show that, although the above mentioned CDM projects causes about 99,000 net direct job losses, they also create about 3.08 million indirect jobs, resulting in the gross employment of CDM to be about 2.98 million. Thereof, hydro projects induce both direct and indirect job losses, which comes to approximately 0.89 million. Solar projects have the most potential since they own the highest indirect jobs created by one GWh generation, about 104 jobs/GWh. 相似文献
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为了解决在华东地区某500 kV变电站主变改造工程中,因原变电站电气主接线中、低压侧特殊的接线方式引起的主变保护选型问题,对500 kV、750 kV、1000 kV三种不同电压等级的主变保护装置进行了详细的对比分析。在技术层面上,从电气主接线形式匹配、保护装置模拟量接口数量、保护功能配置等方面深入探讨方案的可行性,并结合工程造价、供货周期等方面综合考虑其合理性,最终得出了最适合本工程实际情况的解决方案,以期为其他类似改造工程提供一定的参考。 相似文献
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Atif Zafar Lei Li Asif Mehmood Han Wang Jingang Fu 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2021,43(1):1-16
ABSTRACT Steam injection and thermal recovery of oil from the reservoir are increasing day by day. However, the recovery of the heat remained stored in the steam-flooded oil reservoir is nor in practice neither researched previously. A novel concept of steam injection and energy recovery from a light oil reservoir is presented in this paper. Reservoir numerical model of an actual oil field was generated and simulated with steam injection. Different parameters of thermal properties of geologic formations were discussed and adopted as per actual geology of the study area for more realistic simulation of heat storage, dissipation, and losses. After the optimum oil recovery, water was circulated through the same injection well into the reservoir to extract the energy in the form of heat, stored during the steam injection phase. The effects of different completion schemes of injection well were also simulated, discussed and pointed out for optimum oil recovery. Oil recovery factor is the most important parameter from both research and field development point of views. The comparative analysis was also carried out with the oil production without steam injection and found that steam flooding increased oil recovery factor up to more than 15% by decreasing the production time period up to 40% as compared to without steam injection oil production. The transmission of heat through conduction and convection mechanisms in the porous media, and through advective, dispersive and diffusive processes in the fluid was modeled. To fully investigate the feasibility of the concept presented in this paper, the production wellbore modeling was also carried out and temperature profile of recovered heat energy at the wellhead was obtained by acknowledging the thermal losses and found to be very useful for any direct and indirect utilization of heat throughout the energy recovery period of the reservoir. 相似文献
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