太阳能与天然气互补的冷热电联供系统研究

发布时间：2018-06-07 03:32

本文选题：太阳能 + 天然气　；参考：《华北电力大学》2017年硕士论文

【摘要】：能源发展“十二五”、“十三五”规划以来,随着能源结构调整需求的日益明显,减少化石能源利用、大力推广清洁能源已成为当前能源发展改革的重点。在清洁能源连续性、可靠性尚不足以满足能源需求的现状下,化石能源与清洁能源的互补利用逐渐成为当前学者研究的重点。本学位论文依托国家自然科学基金等科研项目,在能源互补的大背景下提出太阳能与天然气互补的冷热电联供系统,为化石能源与清洁能源的互补研究领域提供一些参考。首先,本文基于“温度对口、能量梯级利用”的原则提出了太阳能与天然气互补的冷热电联供系统,在灵活利用余热的原则下对系统夏季白天、夜晚,冬季白天、夜晚工况进行流程设计,并对设计工况进行模拟。其次,根据热力学第一定律和热力学第二定律对系统设计工况进行分析,然后在变太阳能辐照强度、变电负荷率的情况下研究系统变外界工况下的热力性能变化,在变太阳能份额,变天然气份额输入时研究系统变份额输入时太阳能与天然气的热力互补性能。最后,提出优先满足生活热水负荷的混合跟随运行策略思路,对系统可能出现的负荷-系统热电匹配情景进行分析,研究了变负荷热电比下系统一次能源消耗(PEC)、二氧化碳排放(CDE)、运行费用(OC)、(?)效率(EE)、剩余产品及舒适度可靠率各方面的运行性能变化,同时以某酒店建筑为例,将混合跟随策略与电跟随、热跟随策略进行了对比。
[Abstract]:Since the 12th Five-Year Plan and 13th Five-Year Plan of Energy Development, with the increasing demand for energy structure adjustment, reducing fossil energy utilization and vigorously promoting clean energy has become the focus of current energy development reform. Under the condition that clean energy continuity and reliability are not enough to meet the energy demand, the complementary utilization of fossil energy and clean energy has gradually become the focus of current scholars. Based on the national natural science foundation and other scientific research projects, this dissertation puts forward a solar and natural gas complementary cooling and heat supply system under the background of energy complementarity, which provides some references for the complementary research field of fossil energy and clean energy. First of all, based on the principle of "temperature matching, energy cascade utilization", this paper presents a combined cooling and heat supply system with complementary solar energy and natural gas. Under the principle of flexible utilization of residual heat, the system will be used in summer, night and winter days. At night, the flow design is carried out, and the design condition is simulated. Secondly, according to the first law of thermodynamics and the second law of thermodynamics, the design conditions of the system are analyzed. The thermal complementary performance of solar energy and natural gas is studied when the input is variable solar energy and natural gas. Finally, the paper puts forward the idea of mixed follow operation strategy which gives priority to satisfying the domestic hot water load, and analyzes the load-system thermoelectric matching scenario that may appear in the system. The primary energy consumption (PECs), carbon dioxide (CO2) emission and operating cost of the system under variable load ratio are studied. The performance changes of efficiency, surplus products and comfort reliability are also discussed. A hotel building is taken as an example to compare the hybrid following strategy with the electric and heat following strategies.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU83;TM61

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