分布式能源系统的能效计算及优化分析

发布时间：2018-10-18 10:43

【摘要】：随着能源工业的快速发展，分布式能源技术由于其能效高、节能、经济、安全可靠等优点而受到人们的重视。根据分布式能源系统的特点，对“以电定热（冷）”和“以热（冷）定电”两种运行方式的系统进行了能效计算和优化分析。分析了以内燃机和燃气轮机为核心的分布式能源系统的应用特点和工作原理。建立了分布式能源系统和传统能源系统的一次能源利用率、相对节能率和效率的计算模型，讨论了冷（热）电比对分布式能源系统一次能源利用率的影响。以燃气轮机+吸收式溴化锂机组的分布式能源系统为例，从供需平衡的角度，建立了“以电定热（冷）”和“以热（冷）定电”两种不同的运行方式下分布式能源系统的能效计算模型，分析在不同冷（热）电比的情况下，分布式能源系统的能效变化情况，得出在冷（热）电比小于最佳冷电比时，应采用“以热（冷）定电”的运行方式；而在冷电比大于最佳冷电比时，应采用“以电定热（冷）”运行方式。以武汉市某产业园区为例，分析不同发电效率下分布式能源系统的供能能力和能效，，并配置了四种分布式能源系统方案和三种传统能源系统，进行了各方案能效和初投资的分析比较，比较不同方案的分布式能源系统的优劣，给出推荐方案。
[Abstract]:With the rapid development of energy industry, distributed energy technology has attracted much attention because of its advantages of high energy efficiency, energy saving, economy, safety and reliability. According to the characteristics of the distributed energy system, the energy efficiency calculation and optimization analysis of the two operation modes of "electric heating (cooling)" and "heating (cooling) fixing power" are carried out. The application characteristics and working principle of distributed energy system based on internal combustion engine and gas turbine are analyzed. A calculation model of primary energy efficiency, relative energy saving rate and efficiency of distributed energy system and traditional energy system is established, and the influence of the ratio of cold (thermal) to electricity on primary energy efficiency of distributed energy system is discussed. Taking the distributed energy system of absorption lithium bromide unit of gas turbine as an example, from the point of view of balance of supply and demand, The energy efficiency calculation model of distributed energy system under two different operation modes of "electric heating (cooling)" and "heating (cooling)" is established, and the energy efficiency calculation model of distributed energy system under different cold (thermal) power ratios is analyzed. The change of energy efficiency of distributed energy system shows that when the ratio of cold (heat) to electricity is less than the optimal ratio of cold to electricity, the operation mode of "determining power by heat" should be adopted, while when the ratio of cold to electricity is greater than the optimum ratio of cold to electricity, The "electric heating (cooling)" operation mode should be adopted. Taking an industrial park in Wuhan as an example, the energy supply capacity and energy efficiency of distributed energy system under different generation efficiency are analyzed, and four distributed energy system schemes and three traditional energy systems are configured. The energy efficiency and initial investment of different schemes are analyzed and compared, and the advantages and disadvantages of distributed energy systems with different schemes are compared, and the recommended schemes are given.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM61

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