V - vav 中文

vav n.希伯來字母表的第六個字母。

After more than 40 years “ development , variable air volume systems have been widely used in many places besides north america , japan and singapore because of their excellences and have become the most popular and energy - conserving air conditioning systems in commercial buildings Vav系統由于具有諸多優點，經過40多年的發展，在北美、日本、新加坡等地都得到了廣泛的應用，它已經成為目前商業建筑中最流行和最節能的空調系統。
vavasor
In this article , simulations of air distribution in the vav air - conditioned office are carried out in the cases of different air - supplying diffusers including slot diffuser , sqaure grille , bar grille and square diffuser to supply air , the standard three - dimensional k - ? two - equation turbulence model with correctional item of buoyancy effect and simple algorithm are adopted , and wall function method is used to handle boundary conditions 本文采用經過浮升力項修正的-兩方程模型和simple算法，應用壁面函數法處理邊界條件，對利用包括條縫風口、方型百葉風口、長條型百葉風口和方型散流器不同型式送風口送風的變風量空調房間內的氣流組織進行了模擬。
The loops influence as well as interfere each other . the coupling may directly affect the property and the stability of vav system . this thesis focuses on reducing and eliminating the coupling among the control loops by means of setting up the mathematical model of vav system and designing the decoupling control system 這種耦合作用直接影響到變風量空調系統的控制品質和穩定性，本文通過建立被控對象的數學模型和設計解耦控制系統的方法以減小多個控制回路之間的耦合，提高變風量空調系統的控制性能和穩定性。
Here the theoretical model of vav system is set up for the first time . besides , the transfer function matrix of the 5 inputs and the 5 outputs is established by combining the theoretical analysis with the data analysis of experiment . then the non - linear mathematical model of the five loops is delt with in two method : in the first method , taylor progression is applied near the working point of the system in order to make the volume of change between the output and the input become similar to a linear relationship . in the second mothed , the non - linear mathematical model realize linear by means of being devided into sections . the study shows that both the motheds are effective in dealing with the non - linear issue in vav system 本文首次建立了變風量空調系統的機理模型，并通過采用機理分析和實驗數據分析相結合的方法，建立了所研究的五輸入、五輸出的變風量空調系統的傳遞函數矩陣，并對這五個控制回路的被控對象的非線性數學模型，采用兩種方法加以處理：第一種方法是在系統的工作點附近進行泰勒級數展開，使輸出的變化量與輸入的變化量之間呈現近似的線性關系；第二種方法是將非線性的數學模型進行分段線性化，即用分段線性化來逼近非線性化的模型。
In this thesis , the vav decoupling control experiment system based on lonworks technology is set up by means of combination of lon works technology of networks control technology and vav technology . so far , there is no such report in domestic reference . so the experiment system can be regarded as advanced 西安建筑科技大學博士學位論文一本文在變風量空調系統解耦控制的研究過程中，將網絡控制技術中的lonworks技術與變風量空調技術有機地結合起來，建立了基于lonworks技術的變風量空調解耦控制實驗系統，目前國內尚未見到有關這方面的報道，該實驗系統在國內具有先進水平。
At present , variable air volume ( vav ) air - conditioning system is the main steam of the whole air conditioning system in china and abroad because of its large energy conservatioa however , since vav system is multivariable , strongly coupled , nonlinear and time variant , its design , performance and management are more difficult than constant air volume ( cav ) system , and stable control of the entire vav system is focused in particular in china study on the stability , the key condition of the vav operation , the paper divide the vav system into ahu part and terminal part based on the coordination control strategy 目前，變風量( variableairvolume ， vav )空調系統以其巨大的節能潛力逐漸成為國內外空調系統的主流。但是，變風量( vav )空調系統具有多變量、強耦合、非線性、時變的特點，因此它的設計、運行和管理都比定風量( constantairvolume ， cav )系統難度大。這也是限制vav系統更廣泛應用的一個重要原因。
Genetic algorithm is used to optimize the parameters of pid controller that is used to control the plant lon ( local operating network ) is designed to control vav air - conditioning system . by this means the static pressure control and minimum total supply air volume control are experimented . the paper analyzes the coupling among loops , the whole system ' s stability and energy saving effect under the two control methods 針對目前變風量空調系統的模型都是用機理建模方法建立的情況，本論文用最小二乘法對機組部分進行系統辨識，建立了水閥?送風溫度、變頻風機?靜壓兩個回路的模型，經驗證比較接近實際系統；采用遺傳算法對pid控制器的參數進行尋優，尋優結果令人滿意；設計了變風量空調系統的lon控制網絡，以此為實現手段，進行了定靜壓控制和最小總送風量控制，并在兩種控制方式下，分析了各個回路的耦合情況、兩種控制方式的穩定性和節能效果。
Based on the description of styles and characteristics of fume hoods in modern laboratories , this paper analyzes the control strategies in fume hoods and ventilation systems and discusses the control and application of vav as well as its advantages on safety , energy conservation and comfort 摘要在闡述實驗室排風柜的類型及其特點的基礎上，分析了排風柜和通風系統的控制思路，著重討論了vav系統的控制、應用，及其安全性、節能性、舒適性方面的優勢。
Acturelly , there are two systems in the experiment unit of the vav decoupling control system . they are lonworks system and metasys system . as the communication protocols follow their respective standard , the data exchanging between the two systems becomes difficult 在本文所研究的變風量空調解耦控制系統的實驗裝置中，存在著lonworks和metasys兩套系統，而這兩套系統的通信協議遵守不同的標準，使得這兩套系統之間的數據交換出現困難。
After more than 40 years “ development , variable air volume systems have been widely used in many places besides north america , japan and singapore because of their excellences and have become the most popular and energy - conserving air conditioning systems in commercial buildings Vav系統由于具有諸多優點，經過40多年的發展，在北美、日本、新加坡等地都得到了廣泛的應用，它已經成為目前商業建筑中最流行和最節能的空調系統。
Abstract : this paper probes vav air conditioning system control on the basis of design and tryout , and suggests that air volume and air supply cndition should be controlled together in order to keep indoor temperature and humidity together and save energy 文摘:結合工程設計及調試經驗，對變風量空調系統的控制進行了研究，為同時保持室內空氣的溫度、相對濕度和節約能源，提出了將變風量與定送風狀態同時控制的觀點和措施
Using the post processing tools of this cfd software , this article analyses the temperature and velocity field in the vav air - conditioned office and finally evaluates the indoor air distribution , adopting air diffusion performance index ( adpi ) 利用cfd軟件的后處理工具對不同送風方式以及不同工況下的變風量空調室內的溫度場和速度場進行了分析，最后采用空氣分布特性指標對空調室內的氣流組織進行了綜合評價。
In this paper , a variable blast air conditioning system based on vpvt control method is discussed . it is two stages master - slave bus control system . the variable static pressure smart coordinated control algorithm is realized by the master 本文研究了一種基于vpvt控制的變風量空調系統，這是一種二級主從式總線控制系統，主機實現了變靜壓智能協調控制， n臺從機分別對vav實現變風量的溫度間歇式pid批量控制。
The model of the operation efficiency of the uav is established , including the method of hierachical analysis and fuzzy system theory in the synthetic computation of efficiency indexes , realizes the quantitative evaluation of the vav ' s operation efficiency 建立了無人偵察機作戰效能評估模型，從而實現了無人偵察機作戰效能的定量評估，其中效能指標綜合計算中融合了層次分析法和模糊系統理論。
The variable - frequency of the fan control is realized by using the method of total volume air control of vav systems , at the same time , fuzzy - control is applied in terminate controller to make the system get a certain energy consumption 通過引入變風量空調系統總風量控制方法的設計思路對風機進行變頻控制，同時對末端控制器采用模糊控制技術，使得整個空調系統達到一定的節能目的。
Vav system has the feature of multi - variable , intense conpling and nonlinear . when the several control loops in the control system are working together . there is intense coupling among them 變風量空調系統具有多變量、彼此耦合強烈、非線性等特點，其自動控制系統的多個控制回路同時工作時，各個控制回路之間具有強烈的耦合作用，相互影響，相互干擾。
This article takes the air distribution in a vav air conditioned office as the research object and with the application of professional cfd software carries out simulations of indoor air distribution in this office 本文以一辦公用變風量空調室內的氣流組織作為研究對象，利用專業cfd軟件對室內氣流組織進行了數值模擬的研究。
Presents the main components of the vav terminal units of single duct , series fan powered and parallel fan powered , and also their application to the inner and peripheral zone of air conditioning systems 摘要介紹了單風道變風量末端、風機串聯型末端以及風機并聯型末端的主要設備構成及其在空調系統內外區的應用。
A simulation program has been used for predicting the annual fan energy use of variable air volume ( vav ) systems that use variable speed fans and constant duct static pressure control 摘要由于變風量系統( vav )風機能耗可隨負荷的變化而變化，其節能效果明顯，因此近幾年來變風量空調系統在香港得到了廣泛的應用。

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vav

vav n.希伯來字母表的第六個字母。

vavasor