VRV系统在高速公路沿线某房建设施应用研究

发布时间：2018-07-07 19:21

本文选题：IPLV + 能效仿真　；参考：《西安建筑科技大学》2017年硕士论文

【摘要】：近年来,我国高速公路发展迅猛,高速公路沿线房建设施为高速公路的正常运行提供一系列功能,其空调系统是否合理、可靠直接影响着高速公路沿线房建设施功能的发挥。VRV系统因具有使用范围宽广、设计使用灵活、能效比较高等优点,但能否在高速公路沿线合理应用值得研究。一直以来,热泵机组的能效比备受关注,在VRV被广泛应用的今天,如何正确评价其运行能效显得十分重要。我国采用IPLV评价VRV的能效水平,应该在35℃、31.5℃、28℃、24.5℃的室外温度下,通过控制室内机的开机率使机组分别达到100%、(75±10)%、(50±10)%、(25±10)%的负荷率,用得到的EER计算IPLV(C)。本文利用Energy Plus软件中的VRV模型对IPLV进行模拟研究,将变室外温度下的得到结果与整个供冷季节能机组EER平均值对比,结果相差10.6%。与定室外温度下得到的结果相比,变室外温度条件下得到结果更接近真实值。另外,模拟结果显示整个供热季节机组平均COP为3.41,分析其原因为室外换热器结霜影响了机组的制热性能。虽然VRV系统优点突出,但其在冬季制热运行时存在着结霜的技术障碍。本文对应用于宝汉高速南郑收费站办公楼的一套VRV系统进行现场测试,分析了机组结霜、除霜过程中各参数的变化规律,以室外换热器蒸发温度为依据,将结霜周期进行细化,指出各参数在各细化时期内的变化规律。有关除霜起始点的设定,提出设定最小结霜时间,并基于实验数据提出以制热量为控制目标,当大气干球温度与室外换热器底部盘管表面温度满足T_e=KT_a-α,机组开始除霜。
[Abstract]:In recent years, the expressway in China has developed rapidly. The construction of the buildings along the highway provides a series of functions for the normal operation of the expressway. Whether the air-conditioning system is reasonable and reliable, it directly affects the function of the construction of the buildings along the highway. The.VRV system has the advantages of wide use, flexible design and higher energy efficiency. The energy efficiency ratio of the heat pump unit has been paid much attention. Today, how to evaluate the energy efficiency of the VRV is very important. In our country, the IPLV evaluation of the energy efficiency of VRV should be under the control room at 35, 31.5, 28, 24.5. The opening rate of the inner machine makes the unit reach 100%, (75 + 10)%, (50 + 10)%, (25 + 10)% and IPLV (C) calculated with the obtained EER. In this paper, the VRV model in Energy Plus software is used to simulate IPLV, and the results are compared with the EER average of the whole cooling season, and the result is a difference of 10.6%. and room setting. Compared with the external temperature, the results obtained under the variable outdoor temperature are closer to the real value. In addition, the simulation results show that the average COP of the unit in the whole heating season is 3.41. The reason is that the frost formation of the outdoor heat exchanger affects the thermal performance of the unit. Although the advantages of the VRV system are outgoing, it has frosting in the winter heating operation. In this paper, a set of VRV system used in the office building of the Nanzheng toll station in Bao Han expressway is tested in this paper. The changes of the parameters in defrosting and defrosting are analyzed. The frost cycle is refined on the basis of the evaporation temperature of the outdoor heat exchanger, and the change rules of each parameter in each period are pointed out. The setting of the starting point of frost is set up, and the minimum frosting time is set up. Based on the experimental data, it is proposed to control the heat as the control target. When the air dry ball temperature and the surface temperature of the bottom coil surface of the outdoor heat exchanger meet T_e=KT_a- a, the unit starts defrosting.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU83

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