發(fā)布時(shí)間：2018-05-11 20:22

  本文選題：變風(fēng)量空調(diào)系統(tǒng) + 新風(fēng)量控制��； 參考：《大連理工大學(xué)》2013年碩士論文

【摘要】：在變風(fēng)量空調(diào)系統(tǒng)中,送風(fēng)量隨著負(fù)荷的變化而變化,送風(fēng)量的變化會(huì)引起新風(fēng)量偏離設(shè)定值；新風(fēng)量不足將導(dǎo)致室內(nèi)空氣品質(zhì)變差,反之,新風(fēng)量過量則引起處理新風(fēng)的能耗增加；因此,如何控制新風(fēng)量對(duì)保證室內(nèi)空氣品質(zhì)和降低新風(fēng)能耗十分重要。 為了得到有效的新風(fēng)量控制方法,本文首先搭建了一個(gè)小型的變風(fēng)量空調(diào)系統(tǒng)的試驗(yàn)臺(tái),包括硬件系統(tǒng)和自動(dòng)控制系統(tǒng)；通過控制軟件建立了變風(fēng)量空調(diào)系統(tǒng)圖形化控制界面,編寫了各個(gè)控制回路的控制程序并下載到控制器,從而實(shí)現(xiàn)整個(gè)系統(tǒng)的自動(dòng)控制；對(duì)試驗(yàn)臺(tái)進(jìn)行運(yùn)行調(diào)試,以便確定控制回路的最優(yōu)控制參數(shù),最終使系統(tǒng)穩(wěn)定的運(yùn)行。 其次,本文對(duì)新風(fēng)量壓差控制方法的原理以及實(shí)現(xiàn)方法進(jìn)行了詳細(xì)的論述,并在分析了該方法不足的基礎(chǔ)上,提出兩種改進(jìn)的控制方法：改進(jìn)方法一是對(duì)壓差取點(diǎn)位置進(jìn)行了優(yōu)化,以新風(fēng)段靜壓代替新風(fēng)閥壓差來控制新風(fēng)量,即新風(fēng)段靜壓控制方法；改進(jìn)方法二是對(duì)風(fēng)閥的控制策略進(jìn)行優(yōu)化,使得新風(fēng)段和回風(fēng)段阻力最小,即基于新風(fēng)閥和回風(fēng)閥分時(shí)段調(diào)節(jié)的控制方法。 最后,為了檢驗(yàn)壓差控制法以及改進(jìn)方法是否滿足控制要求,本文根據(jù)試驗(yàn)臺(tái)的具體情況設(shè)計(jì)了對(duì)比試驗(yàn)工況,通過試驗(yàn)得到上述控制方法對(duì)新風(fēng)量的實(shí)際控制效果。試驗(yàn)結(jié)果表明,改進(jìn)方法一比壓差控制法的新風(fēng)量控制效果略好,同時(shí)新風(fēng)段靜壓差值比新風(fēng)閥壓差值更大便于測(cè)量；改進(jìn)方法二比壓差控制法的新風(fēng)量控制效果較好,同時(shí)送風(fēng)機(jī)的瞬時(shí)功率得到降低,即具有較好的節(jié)能性。
[Abstract]:In variable air volume air conditioning system, the volume of air supply varies with the change of the load. The change of air supply will cause the deviation of the new wind quantity from the set value. The shortage of fresh air will result in the deterioration of indoor air quality. On the contrary, the excess air volume increases the energy consumption of the new wind. Therefore, how to control the new air quantity to ensure the indoor air quality and reduce the new air quality is new. Wind energy consumption is very important.
In order to get an effective new wind control method, this paper first set up a small air conditioning system test bed, including hardware and automatic control system. Through the control software, the graphical control interface of VAV air conditioning system is set up, and the control program of each control circuit is written and downloaded to the controller. Now the whole system is controlled automatically, and the test bench is run and debugged so as to determine the optimal control parameters of the control loop, and ultimately make the system run stably.
Secondly, the principle and the realization method of the new air pressure difference control method are discussed in detail. On the basis of the analysis of the shortage of the method, two improved control methods are put forward: one is to optimize the position of the pressure difference, and take the new wind section static pressure instead of the pressure difference of the new wind valve to control the new wind, that is, the new wind section. The static pressure control method; the improvement method two is to optimize the control strategy of the wind valve, which makes the resistance of the new wind section and the return air section minimum, that is, the control method based on the time interval adjustment of the new wind valve and the return valve.
Finally, in order to test the pressure difference control method and whether the improved method meets the control requirements, this paper designs the comparison test conditions according to the specific conditions of the test rig, and obtains the actual control effect of the above control method on the new air volume by the test. The experimental results show that the improved method is slightly better than the new wind control method of the method of pressure difference control. The static pressure difference of the new wind section is more convenient than the pressure difference of the new wind valve. The improved method two is better than the pressure difference control method, and the instantaneous power of the fan is reduced, that is, it has better energy saving.

【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU831.3

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本文編號(hào)：1875441