转轮除湿空调系统性能及其能耗分析研究

发布时间：2018-01-28 13:00

本文关键词： 转轮除湿空气源热泵废热回收能耗 (火用)效率　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着人们对于生活品质的追求,对能源的需求量也越来越大。为了减缓能源的消耗,提高室内空气品质,降低固体除湿转轮的再生能耗,本文提出了固体除湿转轮与空气源热泵结合的温湿度独立控制的空调系统。通过MATLAB编程求解除湿转轮的数学模型,得出了不同因素对转轮性能的影响,并通过实验对模拟结果进行了验证。根据除湿转轮的研究结果并结合前人对溶液除湿的研究,利用热泵机组作为冷热源,通过理论计算对比分析了冷凝除湿、转轮除湿与溶液除湿在室内只有湿负荷时的能耗与(火用)效率。针对除湿转轮能耗过高,提出了除湿转轮与空气源热泵结合的空调系统,利用热泵压缩机的高温排气与冷凝热再生除湿转轮以减小能耗,除湿转轮承担室内湿负荷,热泵机组制取高温冷水/低温热水通过辐射板向室内供冷/热。对除湿转轮与空气源热泵结合的空调系统的主要部件进行了设计计算,并在焓差实验室搭建了实验台进行实验研究。除湿转轮的研究结果表明:模拟结果与实验结果基本吻合,证明模拟程序正确可用;增大再生空气温度、降低再生空气含湿量、降低处理空气进口温度能使转轮除湿量增加,减小处理空气进口含湿量、减小再生风速与处理风速使转轮除湿量减小;不同的运行工况,对应有不同最优转速和最优再生面积与除湿面积比。对冷凝除湿、转轮除湿与溶液除湿的能耗计算表明,在设计工况下,冷凝除湿耗功最小、(火用)效率最高,而转轮除湿的耗功最大、(火用)效率最低;室内含湿量较小时,冷凝除湿性能明显降低。以镇江地区一套民居的负荷特点为研究对象,通过实际运行除湿转轮与空气源热泵结合的空调系统,得出在设计工况下系统制冷量能够达到14.76kW,除湿量8.1g/kg,能够满足室内热湿负荷的要求。夏季工况时,系统整体COP可达到4.1,比传统空调系统节能13.6%;冬季供热工况时系统COP为3.68,比传统空调系统节能20%。
[Abstract]:Along with the people for the pursuit of quality of life, the demand for energy is also growing. In order to reduce energy consumption, improve indoor air quality, reduce the energy consumption of solid desiccant regeneration, this paper puts forward the independent temperature and humidity air conditioning system with solid desiccant and air source heat pump control. The mathematical model of MATLAB programming solution dehumidification the runner, the influence of different factors on the performance of the runner and through the experiment, the simulation results were verified. According to the research results of desiccant wheel and the combination of liquid desiccant predecessors, using heat pump unit as the heat source, through theoretical calculation and comparative analysis of condensation dehumidification, dehumidification and solution dehumidification indoors only energy consumption wet load and efficiency (exergy). The desiccant air conditioning system of high energy consumption, put forward the combination of desiccant and air source heat pump, heat pump High temperature exhaust compressor and condenser heat regenerative desiccant dehumidifier to reduce energy consumption, undertake indoor wet load, high temperature / low temperature cold water heat pump hot water through the radiation plate to the indoor cooling / heating. The main component of air conditioning system of desiccant and air source heat pump was designed, and the enthalpy difference lab building the test stand. The research of desiccant wheel the results show that the simulation results agree well with the experimental data and simulation prove correct procedures available; increasing the regeneration air temperature, reduce the regeneration air moisture content, lower processing temperature of inlet air can make the dehumidification quantity increase, reduce the air humidity of inlet velocity, reduce regeneration the wind speed and processing of desiccant wheel is decreased; different operating conditions, corresponding to different optimal speed and the optimal regeneration area and area ratio of desiccant cooling dehumidification, turn Calculation shows that the energy consumption of liquid desiccant dehumidification and wheel, in design condition, the minimum power consumption (condensation dehumidification, exergy efficiency is the highest, and desiccant) of the consumption of the largest (exergy) efficiency is the lowest; indoor humidity is small, condensation dehumidification performance degradation. The load characteristics of Zhenjiang area of a residential study the object, combined with the actual operation of air conditioning system of desiccant wheel and the air source heat pump, the condition in the design of the refrigerating capacity of the system can reach 14.76kW, dehumidification capacity 8.1g/kg, can meet the requirements of heat and humidity load. In summer, the whole system can reach 4.1 COP, saving 13.6% than the traditional air conditioning system; winter heating operation system COP is 3.68, 20%. energy than the traditional air conditioning system

【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB657.2

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