基于TYNSYS的太阳能再生溶液除湿空调系统仿真模拟与性能分析

摘要

传统的空调系统虽然可以满足室内的温湿度的控制要求，但是也有很多相应的问题，带来负面影响，例如除湿能耗高，污染环境，降低室内空气品质等，在资源紧张，环境保护要求越来越高的今天，研究和应用新型的节能环保型的空调系统就越发的重要了。特别是对于工业生产的建筑空调系统，不仅对温度精度要求高，对室内环境的湿度也有很高的要求。本文以一个工业厂房为例，基于TRNSYS模拟平台，对太阳能再生溶液除湿空调系统进行了系统的仿真模拟，论文的主要工作如下：

首先，分析了溶液除湿空调系统中的除湿器和再生器的原理，建立其两种设备传热传质过程的简化的物理模型，并结合能量守恒、质量守恒定律及传热传质方程建立了叉流除湿器和逆流再生器的数学模型。根据给出的数学模型编写了改传热传质的C语言程序，并在TRNSYS动态模拟软件平台上首次开发了除湿器和再生器的模块。利用文献中的实验数据对除湿器和再生器模块的准确性进行验证，模拟结果表明相对误差在15%以内，说明开发的模块具有较高的准确度，为太阳能再生的溶液除湿空调系统的模拟提供了较为准确的部件模型。

其次，以TRNSYS动态模拟软件为平台，搭建了太阳能再生溶液除湿空调系统，通过对单一变量进行改变，研究了入口空气的流速，入口溶液的流速，浓度和温度等变量对除湿器和再生器性能的影响。模拟发现，随着空气流量、溶液流量以及溶液浓度的增加以及溶液温度的降低，除湿量会增加。除湿效率则是随着溶液流量和溶液温度的增加，空气流量的减少而升高。而对于系统中的再生器，空气流量、溶液流量和溶液温度的升高以及溶液浓度的降低会增加再生量，空气流量和溶液温度的下降，溶液流量的增加会提高再生效率。而溶液浓度的变化对除湿和再生效率的影响都比较小。

最后，以济南郊区某大理石厂为例，分析了太阳能再生溶液除湿系统在实际工程中的应用，通过TRNSYS对厂房的除湿系统的运行工况进行模拟，结果表明系统在七、八、九三个月的能耗总量为119444kWh，系统中太阳能保证率约为41.78%。通过对冷凝除湿系统和溶液除湿系统的初投资和运行能耗费用对比，发现溶液除湿系统约比冷凝除湿系统节能40%，在应用上更具优势，值得在有深度除湿要求的工业生产中进行推广。本文的研究可为太阳能再生溶液除湿空调系

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万方数据

统的工程应用提供技术指导及设计模拟工具。

关键词：溶液除湿，TRNSYS，太阳能再生，动态模拟，传热传质

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Simulation and performance analysis for aliquid desiccant air conditioning system using solar energy based on TRNSYS

Haipeng An (Architecture And Civil Engineering)Directed by Ping Cui

ABSTRACT

Although the traditional air conditioning system can meet the control requirements of the indoor air temperature and humidity,a series of problems (such as the high energy consumption of dehumidification,the pollution of the environment,the reduction of indoor air quality)appear,which have unavoidably resulted in negative influences Because of the shortage of resources and the increasing requirement of environmental protection,it is more and more important to investigate and employ the new energy-saving and environmental friendly air conditioning system.Especially for the air conditioning systems which are used for industrial processes,the demanding standards are set for not only the temperature precision but also the indoor humidity.This paper takes an industrial workshop as an example,and simulate the system of a liquid desiccant air conditioning system using solar energy based on the TRNSYS simulation platform.The main work can be summarized as follows:

Firstly,the principles of the dehumidifier and regenerator of a liquid desiccant air conditioning system have been analyzed.The physical models for the heat and mass transfer process of these two devices are established.The mathematical models of the cross-flow dehumidifier and the counter-current regenerator are built based on the principles of energy conservation,mass conservation law and heat and mass transfer process.,The C language program has been compiled according to the mathematical models,and then the modules of both the dehumidifier and the regenerator are firstly developed on the TRNSYS dynamic simulation platform.The accuracy of the dehumidifier and regenerator modules are verified by the experimental data in the literature.The results show that the relative error between the simulated and experimental data is within 15%,which illustrates that the developed models has a

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