【摘要】：本文主要針對(duì)上海交通大學(xué)自動(dòng)化系動(dòng)態(tài)系統(tǒng)實(shí)驗(yàn)室籌建的ACB式HVAC實(shí)驗(yàn)系統(tǒng)進(jìn)行研究。 首先描述了ACB式空調(diào)實(shí)驗(yàn)系統(tǒng)的原理與結(jié)構(gòu),闡述了本文主要針對(duì)冷卻水循環(huán)進(jìn)行建模。 之后對(duì)ACB式HVAC系統(tǒng)進(jìn)行了建模。建模過程主要針對(duì)載冷劑循環(huán)進(jìn)行,分為對(duì)主動(dòng)式冷梁的建模以及對(duì)空氣處理機(jī)的建模。對(duì)于主動(dòng)式冷梁的建模,首先根據(jù)流體力學(xué)理論和紊動(dòng)射流理論,在分析了主動(dòng)式冷梁結(jié)構(gòu)的基礎(chǔ)上,推導(dǎo)出了單個(gè)噴嘴壓差與出風(fēng)量數(shù)學(xué)關(guān)系,根據(jù)誘導(dǎo)比公式得到壓差與卷吸量的數(shù)學(xué)模型。隨后得到了主動(dòng)式冷梁誘導(dǎo)過程數(shù)學(xué)模型,并且通過CFD仿真軟件Fluent的仿真數(shù)據(jù)對(duì)未知參數(shù)進(jìn)行了辨識(shí),然后在主動(dòng)式冷梁工作區(qū)間內(nèi)選取其他工作點(diǎn),對(duì)所得到的模型進(jìn)行了驗(yàn)證,之后結(jié)合主動(dòng)式冷梁中的盤管模型,得到了主動(dòng)式冷梁的模型。對(duì)于空氣處理機(jī)的模型,將其分為翅片式表冷器和風(fēng)機(jī)兩個(gè)模塊,分別對(duì)其建模。一方面,針對(duì)翅片式表冷器分析了其工作狀況,結(jié)合已有文獻(xiàn)推導(dǎo)出了表冷器的模型,并且對(duì)翅片效率和水側(cè)換熱系數(shù)提出了模型的改進(jìn),最后利用系統(tǒng)測得的數(shù)據(jù)對(duì)表冷器中未知參數(shù)進(jìn)行了估計(jì),并且在ACB式HVAC實(shí)驗(yàn)系統(tǒng)中驗(yàn)證了模型的有效性。另一方面,針對(duì)風(fēng)機(jī)利用ACB式HVAC實(shí)驗(yàn)系統(tǒng)中可以測量到的空氣流量數(shù)據(jù)與風(fēng)機(jī)頻率建立了回歸方程,得到了風(fēng)機(jī)頻率與空氣流量的關(guān)系,之后結(jié)合兩個(gè)模型得到了空氣處理機(jī)的模型。 最后對(duì)ACB實(shí)驗(yàn)系統(tǒng)進(jìn)行了監(jiān)控界面的搭建以及啟停邏輯的編寫,分別編寫了空氣處理機(jī)、制冷機(jī)以及循環(huán)水泵的啟停邏輯。
[Abstract]:This paper focuses on the ACB HVAC experimental system, which is designed by the dynamic Systems Laboratory of the Department of Automation of Shanghai Jiaotong University. Firstly, the principle and structure of ACB air conditioning experimental system are described, and the model of cooling water circulation is described in this paper. Then the ACB HVAC system is modeled. The modeling process is mainly aimed at refrigerant loading cycle, which includes the modeling of active cold beam and the modeling of air processor. For the modeling of active cold beam, firstly, according to the theory of fluid dynamics and turbulent jet, the mathematical relationship between the pressure difference of single nozzle and the air output is deduced on the basis of analyzing the structure of the active cold beam. According to the inductive ratio formula, the mathematical model of the pressure difference and the volume of entrainment is obtained. Then the mathematical model of active cold beam induction process is obtained, and the unknown parameters are identified by the simulation data of CFD simulation software Fluent, and then other working points are selected in the active cold beam working area. The model is verified, and then the model of active cold beam is obtained by combining the coil model of active cold beam. For the model of air processor, it is divided into two modules: wing panel air cooler and fan. On the one hand, based on the analysis of the working condition of the fin type surface cooler, the model of the surface cooler is deduced in combination with the existing literature, and an improvement on the fin efficiency and the heat transfer coefficient of the water side is put forward. Finally, the unknown parameters in the surface cooler are estimated by using the measured data of the system, and the validity of the model is verified in the ACB HVAC experimental system. On the other hand, the regression equation between fan frequency and air flow data which can be measured in ACB HVAC experimental system is established, and the relationship between fan frequency and air flow rate is obtained. Then the model of air processor is obtained by combining two models. Finally, the ACB experimental system is built up with the monitoring interface and the logic of starting and stopping, and the starting and stopping logic of the air processor, the refrigerator and the circulating water pump are compiled respectively.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB657.2

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