某中央空调系统节能改造研究

发布时间：2018-04-11 17:32

本文选题：能效指标值 + 冷冻水变流量　；参考：《哈尔滨工业大学》2013年硕士论文

【摘要】：现阶段，随着我国大型公共建筑的建筑面积的逐年增长，建筑高能耗问题越来越受到重视，同时由于中央空调系统能耗在建筑能耗中占有很大的比重，使得中央空调系统的节能成为建筑节能的关键所在。本文通过对某医院的实际的中央空调系统的运行工况的检测，结合文中所介绍的空调系统的能效指标值的计算，指出了空调系统运行过程中存在的不合理现象。并针对具体问题提出了相应的改进措施，分别提出了对冷冻水系统进行变流量和变水温的改进运行方式。针对不同的运行方式给出了空调运行时系统能耗的计算方法，通过确定冷冻水泵在部分负荷率下的实际运行工况点给出了冷冻水泵能耗的计算方法，结合冷水机组在变流量下的性能参数来确定变流量冷冻水系统的运行能耗；通过利用Visual Basic语言对表冷器的实际处理性能进行编程计算，分析了改变冷冻水供水温度对室内温湿度所造成的影响，并给出了不同负荷率下的冷冻水的供水温度的设定值。为了能够准确的分析本文中提出的改进措施的节能效果，文中利用Trnsys能耗模拟软件对原有的空调系统及改进的空调系统进行了空调运行季的运行能耗的模拟计算。通过模拟计算，，得出采用变流量的冷冻水系统相对定流量系统能够实现空调系统运行季节能7.4%，同时采用变水温运行的系统能够实现的节能潜力为3.9%。
[Abstract]:At present, with the increasing of the building area of large public buildings in our country, more and more attention has been paid to the problem of high building energy consumption. Meanwhile, the energy consumption of central air conditioning system occupies a large proportion in building energy consumption.Make the central air-conditioning system energy-saving become the key to building energy-saving.This paper points out the unreasonable phenomenon existing in the operation process of the air conditioning system by checking the operating conditions of the actual central air conditioning system in a certain hospital and combining with the calculation of the energy efficiency index value of the air conditioning system introduced in this paper.According to the specific problems, the corresponding improvement measures are put forward, and the improved operation mode of the chilled water system with variable flow rate and variable water temperature is put forward respectively.According to different operation modes, the calculation method of energy consumption of air conditioning system is given, and the calculation method of energy consumption of refrigeration pump is given by determining the actual operating conditions of the refrigerating pump under partial load rate.Combined with the performance parameters of chillers under variable flow rate, the energy consumption of chilled water system with variable flow rate is determined, and the actual processing performance of surface cooler is calculated by using Visual Basic language.The effect of changing the water temperature on the indoor temperature and humidity is analyzed, and the set values of the water supply temperature under different loading rates are given.In order to accurately analyze the energy saving effect of the improved measures proposed in this paper, the energy consumption of the original air conditioning system and the improved air conditioning system is simulated and calculated by using the Trnsys energy consumption simulation software.Through simulation and calculation, it is concluded that the refrigerated water system with variable flow rate can realize the energy saving potential of the air conditioning system in the season of 7.4 and the energy saving potential of the system using the variable water temperature operation system is 3.9.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831.3

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