商场中央空调系统能耗模拟与优化控制研究

发布时间：2018-05-03 11:47

本文选题：建筑能耗 + 组件模型　；参考：《华中科技大学》2015年硕士论文

【摘要】：能源消耗、节能环保问题一直都是当今社会关注的焦点,许多城市都出现能源使用紧张的问题。中央空调作为能耗大户,其能耗分析和节能控制的研究具有重大意义。空调系统的能耗与控制系统、建筑类型、围护结构、气候特点、人员流量及设备散热等内外扰因素紧密相关,这就要求其节能控制方案的研究必须以整个建筑为依托提出,而当下控制方面的研究大多脱离实际建筑和整体空调系统,局限于某些单一环节。本文首先介绍中央空调系统的组成和制冷基本原理,研究制冷机组台数、系统效率COP、部分负荷性能系数IPLV、制冷机组运行台数匹配方案、供回水温差、流体流量大小等因素对空调性能和能耗的影响。分析各环节对大型商场建筑的能耗影响大小,提出随着负荷量大小变化的节能控制方案。然后,综合传热学、热力学、流体力学等知识在Trnsys软件中重新搭建精确的中央空调系统数学模型,包括水泵、风机、风/水管路、阀门组件,以弥补Trnsys软件只考虑管网热力特性而忽视水力特性的不足。接着,在Trnsys软件中搭建本项目商场建筑和中央空调系统模型,模拟商场空调房间温度、冷热负荷量。提出全空气空调系统的联合控制方案,包括送风、回风及新风变流量优化控制、冷冻水二次泵变流量优化控制、制冷机组配置方案和机组台数优化启停控制。通过与原基准空调系统对比,全面分析控制效果,仿真计算各优化控制环节和整体系统能耗,各环节节能比例分别为26.76%、61.94%、22.95%、20.68%、35.75%和26.95%,整体空调系统节能26.95%,表明优化控制系统从单个控制环节到整体系统节能效果都良好。
[Abstract]:Energy consumption, energy conservation and environmental protection have always been the focus of attention. Central air conditioning as a large energy consumption, its energy-consumption analysis and energy-saving control research has great significance. The energy consumption of air conditioning system is closely related to the internal and external disturbance factors such as control system, building type, enclosure structure, climate characteristics, flow rate of personnel and heat dissipation of equipment, which requires the research of energy saving control scheme to be based on the whole building. However, most of the current researches on control are separated from the actual buildings and the whole air-conditioning system, and are limited to some single links. This paper first introduces the composition and refrigeration principle of central air conditioning system, studies the number of refrigeration units, system efficiency, partial load performance coefficient IPLVand the matching scheme of the number of refrigerating units running, the difference of return water temperature is studied. The effect of fluid flow on air conditioning performance and energy consumption. This paper analyzes the influence of each link on the energy consumption of large market buildings, and puts forward the energy saving control scheme which changes with the load. Then, integrating knowledge of heat transfer, thermodynamics, fluid mechanics, and so on, the precise mathematical model of central air conditioning system is rebuilt in Trnsys software, including water pump, fan, wind / plumbing, valve assembly, etc. In order to make up for the shortage of Trnsys software only considering the thermodynamic characteristics of the pipe network and ignoring the hydraulic characteristics. Then, the model of market building and central air conditioning system is built in Trnsys software to simulate the air conditioning room temperature and heat and cold load. The joint control scheme of the whole air conditioning system is put forward, including air supply, return air and fresh air variable flow optimization control, refrigerated water secondary pump variable flow optimization control, refrigeration unit configuration scheme and unit number optimal start and stop control. By comparing with the original reference air conditioning system, the control effect is comprehensively analyzed, and the optimal control links and the overall system energy consumption are simulated and calculated. The proportion of energy saving in each link is 26.7661.94 and 22.955.75% and 26.95%, respectively. The whole air conditioning system is energy saving 26.95%, which indicates that the optimization control system has good energy saving effect from single control link to whole system.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83;TU111.195

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