不同控制策略下变风量空调系统夏季运行工况  

Analysis of cooling system in summer for VAV air conditioning system under different control strategies

作　　者：丁帅[1,2] 孟庆龙 常赛南[1] 

机构地区：[1]长安大学环境科学与工程学院,西安710061 [2]日照市东港区钢铁配套产业园服务中心,山东日照276800 [3]长安大学建筑工程学院,西安710061

出　　处：《土木建筑与环境工程》2018年第2期124-131,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(51208059);陕西省自然科学基础研究计划(2016JM5076)~~

摘　　要：针对变风量空调实际运行中出现的冷热不均问题,通过运行两种变静压、一种定静压控制策略下的变风量系统,对比分析室温、风量、风机频率、最大阀位、设定静压值与风机能耗的关系。结果表明:变风量箱在设计控制阀门的算法中除设定温度之外还需要考虑IAQ、相对湿度等因素;使用变风量空调之前应将室温降至设定温度后再打开自动控制系统,避免受到算法的延迟影响;定静压输送单位冷负荷需要消耗的电量,比测点靠近风机的变静压控制策略多7.8%,且降温效果较差;外界环境几乎相同的情况下,变静压策略中,静压基础点远离风机的控制策略较靠近风机的控制策略降温效果好,速度至少快14%,消耗电量几乎相同。For solving the uneven cooling problem of VAV(variable air volume)air conditioning operation,two kinds of variable static pressure and one kind of constant pressure control strategies of VAV system were operated.The relationship of room temperature,air volume,fan frequency,maximum value position,and setting pressure valve with fan power consumption respectively were analyzed and compared.Experimental results show that in addition to the set temperature,the Indoor Aai Quality(IAQ)、relative humidity and other factors should be considered in the design of valve control algorithm for variable air volume box;When using the variable air volume air conditioning system,the room temperature should bereduced to the set temperature,then the automatic control system is opened to avoid being affected by the delay of the algorithm.As to transporting unit cooling load,the electrical consumption under constant static strategy is more 7.8%than it under variable pressure strategy which static pressure measuring point is nearing the fan.And the cooling effect of constant static strategy is poor.Under the same outside conditions,compared to variable pressure strategy with static pressure measuring point nearing the fan,the cooling effect under the variable pressure strategy with static pressure measurement point far away from the fan is better.The cooling rate is at least 14%faster.And the consumption of electricity is almost the same.

关 键 词：变风量系统 变静压 定静压 能耗 温度 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]