【作者】 陈强；

【导师】 姜小敏； 高慧峰；

【作者基本信息】 上海工程技术大学 ， 机械制造及其自动化， 2016， 硕士

【摘要】 随着我国对天然气开发利用速度的加大,能源消费结构将发生较大改变,天然气在能源消费中所占的比例会逐渐增大,以天然气为燃料的热电联产系统以其安全性和环保性在实际中应用会越来越多。本文以提高一次能源利用率为原则,将Capstone C30微型燃气轮机发电机组和换热设备集成在一起,设计了一款热电一体机装置,并对热电一体机中的C30微燃机发电机组机箱内的速度场和温度场进行了数值模拟和分析。本文主要研究工作如下:(1)Capstone C30微型燃气轮机发电机组特性分析对微型燃气轮机发电机组主要部件的工作原理和特性进行分析,根据特性方程计算出C30微型燃气轮机发电机组的发电量、发电效率等性能参数,最后将这些参数与设计值进行对比分析。(2)热电一体机的设计对Capstone C30微型燃气轮机发电机组性能进行分析,根据微燃机排烟特性和机箱出口处冷却空气特性,分别选择合适的换热器,以提高一次能源利用率为原则,兼顾一体机内部温度和空间分布的合理性,将C30微燃机发电机组与换热器集成,设计了一款热电一体机装置。(3)热电一体机中C30微燃机发电机组内部的热流分析C30微燃机发电机组运行中对发电机和燃料系统阀门表面最高温度有限定要求,超过了该限定温度后会对C30微燃机发电机组发电量和发电效率产生不利影响,为研究热电一体机中C30微燃机发电机组能否满足该要求,对热电一体机中发电机组机箱内部进行了热流分析。在热流分析中,建立了CFD数值模拟模型,应用Fluent软件数值模拟了一体机在不同环境温度下热电一体机在额定工况下运行时发电机组机箱内部的速度场和温度场,分析发电机和燃料系统阀门表面温度是否满足限定温度要求。最后,测试了C30机组在实际运行状态下出口截面处冷却空气的温度,将测试数据与模拟值进行对比分析,验证数值模拟结果的合理性。(4)热电一体机的性能评价以上海市为例,对本文所设计的热电一体机装置与常规供能系统进行对比,对两类系统一次能源利用率和污染物排放对环境的影响进行了分析评价。更多还原

【Abstract】 With the increase of natural gas exploitation in China, energy consumption structure will be greatly changed, the natural gas proportion in the energy consumption will increase gradually. With the anvantages of safe and environment-friendly, the Combined of Heat and Power system(CHP) with natural gas as fuel was increasing applied in practice. In order to improve the Primary Energy Rate(PRE), the Capstone C30 micro turbine generator unit and heat exchange equipments were integrated and integrative heat and power machine was designed, its velocity and temperature field in the C30 micro turbine generator unit case were analyzed. The main research contents of this paper are as follows:(1) Characteristics analysis of Capstone C30 micro turbine generator unitFirstly, the working principle and characteristic of the micro gas turbine generator unit components were analyzed. Secondly, the generation power and generation efficiency were calculated according to the characteristics equtions. Finally, these parameters were compared and analyzed with the design values.(2) The design of integrative heat and power machineThe characteristics of C30 micro turbine generator unit was analyzed, according to the parameter of the exhaust and the hot air at the outlet, appropriate heat exchangers were selected, with higher Primary Energy Rate(PRE) as principle, and taking into account the internal heat and space allocation of the system, C30 micro turbine generator unit and heat exchangers were integrated, integrative heat and power machine was designed.(3)Thermal analysis in C30 micro turbine generator unit case of integrative heat and power machineThe maximum surface temperature of the generator and fuel system have limited for the C30 micro turbine generator unit. The power generation efficiency will reduce when the limited temperature surpassed. In order to study whether the C30 micro turbine generator unit of integrative heat and power machine meet the requirement, the thermal field in C30 micro turbine generator unit case was analyzed. Computational Fluid Dynamic(CFD) modle was established, The temperature and velocity field in C30 micro turbine generator unit case were simulated by using Fluent microsoft, the surface temperature of the generator and fuel system were analyzed. The temperature of the hot air at the outlet of C30 micro turbine generator unit case was measured under the actual operating conditions, it was compared with the simulation result, the rationality of the numerical simulation process was verified.(4) Evaluation the performance of integrative heat and power machineTaking Shanghai as an example, integrative heat and power machine was compared with the conventional energy system, energy efficiency and environmental protection performance were analyzed.更多还原