低温热源驱动的小型太阳能溴化锂空调设计
发布时间：2018-11-19 13:44
【摘要】：随着人们对建筑热环境的要求越来越高，建筑耗能与环境污染所带来的问题引起了人们的广泛关注。太阳能吸收式空调利用太阳光辐射能量驱动制冷，使用时无污染、能耗低，且具有良好的季节匹配性，，是一种发展前景广阔的制冷方式。本文在实验室前期对强化换热结构以及超声强化传质的研究基础上，提出了一种低温热源驱动的小型太阳能吸收式制冷空调。本文重点研究了利用超声强化传质和强化换热结构的，小型化溴化锂机组内部传热结构设计，包括机组热平衡计算、传热面积、传热系数和结构尺寸的计算；利用TRNSYS太阳能瞬态模拟软件建立了机组仿真模型，分析了各主要部件对机组性能的影响；开发了机组控制系统的硬件部分，并对机组控制系统进行了初步的优化设计。具体的研究内容和结论如下： （1）以华南理工大学19号楼配楼101房间为负载研究对象，利用课题组开发的太阳能溴化锂吸收式制冷机组设计计算软件，确定了机组的各状态参数，并对机组进行了热平衡验算；根据机组各状态点参数，对机组各传热设备负荷进行了计算，根据计算结果设计了机组内部各传热设备的结构；针对机组内部各传热设备不同的工作环境和特点，为不同的传热管设计了不同的强化传热/传质表面结构；最后设计了机组的冷却塔和太阳能集热、蓄热系统。 （2）利用太阳能瞬态模拟软件TRNSYS对太阳能空调系统进行了分析。研究了太阳能集热器，蓄热水箱，吸收式制冷机组等主要部件对系统太阳能分数，供热系统的平均效率以及整个太阳能空调性能的影响。根据广州地区典型气象年资料，分析了夏季7月份太阳能空调系统的性能表现。 （3）根据机组运行时负荷以及制冷机的工作参数不断变化的特点，设计了机组的自动控制系统。根据机组控制系统的需求设计了控制器，包含模拟量采集、数据输入/输出、串口通讯，数码管显示等各个硬件模块；根据太阳能吸收式制冷机组的特点，初步设计和优化了机组自动控制系统程序。
[Abstract]:With the increasing demands on the thermal environment of buildings, the problems caused by building energy consumption and environmental pollution have aroused widespread concern. Solar absorption air conditioning uses solar radiation energy to drive refrigeration. It has no pollution, low energy consumption and good seasonal matching. It is a promising refrigeration method. Based on the study of enhanced heat transfer structure and ultrasonic enhanced mass transfer in early laboratory, a small solar absorption refrigeration system driven by low temperature heat source is proposed in this paper. This paper focuses on the internal heat transfer structure design of miniaturized lithium bromide units using ultrasonic enhanced mass transfer and enhanced heat transfer structure, including the calculation of heat balance, heat transfer area, heat transfer coefficient and structure size of the unit. The simulation model of the unit is established by using the TRNSYS solar energy transient simulation software, the influence of main components on the unit performance is analyzed, the hardware part of the unit control system is developed, and the preliminary optimization design of the unit control system is carried out. The specific research contents and conclusions are as follows: (1) taking Room 101 of Building No. 19 of South China University of Technology as the load research object, the design and calculation software of lithium bromide absorption refrigeration unit based on solar energy developed by the research group is used. The state parameters of the unit are determined, and the heat balance of the unit is checked. According to the parameters of each state point of the unit, the load of each heat transfer equipment of the unit is calculated, and the structure of the heat transfer equipment inside the unit is designed according to the calculation results. According to the different working environment and characteristics of each heat transfer equipment in the unit, different surface structures of enhanced heat and mass transfer are designed for different heat transfer tubes. Finally, the cooling tower and solar energy collection and heat storage system of the unit are designed. (2) the solar air conditioning system is analyzed by the solar transient simulation software TRNSYS. The effects of main components such as solar collector, storage tank and absorption refrigeration unit on the solar energy fraction, the average efficiency of the heating system and the performance of the whole solar air conditioning system are studied. Based on the data of typical meteorological year in Guangzhou, the performance of solar air conditioning system in July in summer is analyzed. (3) the automatic control system of the unit is designed according to the characteristics of the load when the unit is running and the working parameters of the refrigerator constantly changing. According to the demand of the unit control system, the controller is designed, including analog data acquisition, data input / output, serial communication, digital tube display and other hardware modules. According to the characteristics of solar absorption refrigeration unit, the program of automatic control system is designed and optimized.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831.4
本文编号：2342476
[Abstract]:With the increasing demands on the thermal environment of buildings, the problems caused by building energy consumption and environmental pollution have aroused widespread concern. Solar absorption air conditioning uses solar radiation energy to drive refrigeration. It has no pollution, low energy consumption and good seasonal matching. It is a promising refrigeration method. Based on the study of enhanced heat transfer structure and ultrasonic enhanced mass transfer in early laboratory, a small solar absorption refrigeration system driven by low temperature heat source is proposed in this paper. This paper focuses on the internal heat transfer structure design of miniaturized lithium bromide units using ultrasonic enhanced mass transfer and enhanced heat transfer structure, including the calculation of heat balance, heat transfer area, heat transfer coefficient and structure size of the unit. The simulation model of the unit is established by using the TRNSYS solar energy transient simulation software, the influence of main components on the unit performance is analyzed, the hardware part of the unit control system is developed, and the preliminary optimization design of the unit control system is carried out. The specific research contents and conclusions are as follows: (1) taking Room 101 of Building No. 19 of South China University of Technology as the load research object, the design and calculation software of lithium bromide absorption refrigeration unit based on solar energy developed by the research group is used. The state parameters of the unit are determined, and the heat balance of the unit is checked. According to the parameters of each state point of the unit, the load of each heat transfer equipment of the unit is calculated, and the structure of the heat transfer equipment inside the unit is designed according to the calculation results. According to the different working environment and characteristics of each heat transfer equipment in the unit, different surface structures of enhanced heat and mass transfer are designed for different heat transfer tubes. Finally, the cooling tower and solar energy collection and heat storage system of the unit are designed. (2) the solar air conditioning system is analyzed by the solar transient simulation software TRNSYS. The effects of main components such as solar collector, storage tank and absorption refrigeration unit on the solar energy fraction, the average efficiency of the heating system and the performance of the whole solar air conditioning system are studied. Based on the data of typical meteorological year in Guangzhou, the performance of solar air conditioning system in July in summer is analyzed. (3) the automatic control system of the unit is designed according to the characteristics of the load when the unit is running and the working parameters of the refrigerator constantly changing. According to the demand of the unit control system, the controller is designed, including analog data acquisition, data input / output, serial communication, digital tube display and other hardware modules. According to the characteristics of solar absorption refrigeration unit, the program of automatic control system is designed and optimized.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831.4
【参考文献】
相关期刊论文 前10条
1 胡豫杰;任绳风;常茹;;吸收式太阳能制冷空调经济性的研究[J];建筑节能;2007年08期
2 梁世强;赵杰;王立;淮秀兰;;离子液体型新工质对吸收式制冷循环[J];工程热物理学报;2010年10期
3 姜周曙,王如竹,卢允庄,邵渊;吸附-吸收复叠式三效制冷循环[J];化工学报;2002年06期
4 万忠民,舒水明,郭义明;一种新的太阳能吸收式制冷系统中的蓄能技术[J];华中科技大学学报(自然科学版);2002年07期
5 万忠民,舒水明;一种高效太阳能混合吸收式制冷循环系统[J];华中科技大学学报(自然科学版);2003年01期
6 王智超;杨英霞;袁涛;李剑东;刘峗;于震;;广州市公共建筑空调冷源状况及能耗调查分析[J];建筑热能通风空调;2011年01期
7 白剑;田琦;汝伶俊;;太阳能强制循环直接热水系统的Trnsys模拟及分析[J];建筑热能通风空调;2012年03期
8 程文龙;赵锐;;添加剂对氨水鼓泡吸收强化效果的实验研究[J];流体机械;2008年09期
9 徐士鸣;吸收式制冷循环及制冷工质研究进展(Ⅱ)——新型吸收式制冷工质系[J];流体机械;1999年03期
10 马文生;郝斌;;光伏建筑一体化相关问题的探讨[J];可再生能源;2011年01期
相关博士学位论文 前1条
1 汪磊磊;高效溴化锂吸收式制冷循环及吸收器热质传递研究[D];天津大学;2010年
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