本文關(guān)鍵詞： 地埋管直供 輻射供冷 置換通風(fēng) 控制策略 能耗預(yù)測(cè)　出處：《山東建筑大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：地板輻射供冷耦合置換通風(fēng)系統(tǒng)的空調(diào)技術(shù)比較成熟,但是在國(guó)內(nèi)非常成功的應(yīng)用實(shí)例并不常見(jiàn)。該系統(tǒng)最大的優(yōu)點(diǎn)是能夠?qū)崿F(xiàn)冬夏共用同一套末端裝置,節(jié)省投資費(fèi)用。其次,系統(tǒng)的舒適性也較好,冬季能夠?qū)崿F(xiàn)“頭冷腳暖”的空調(diào)環(huán)境,夏季通過(guò)置換通風(fēng)將室內(nèi)的空氣均勻混合,減小垂直方向上的溫度分層,維持室內(nèi)空氣品質(zhì)良好。但是這種復(fù)合空調(diào)系統(tǒng)需要精確的控制系統(tǒng),實(shí)時(shí)監(jiān)測(cè)并調(diào)控室內(nèi)溫濕度,避免地板表面結(jié)露,還要考慮樓板的熱惰性及溫度延遲現(xiàn)象。在盡量減少能耗的基礎(chǔ)上達(dá)到更佳的空調(diào)效果是本文研究的目的。本文以地埋管直供條件下的地板輻射供冷空調(diào)系統(tǒng)為研究對(duì)象,以濟(jì)南安泰智能工程有限公司辦公樓的空調(diào)系統(tǒng)為模型,以TRNSYS能耗仿真模擬軟件為工具,通過(guò)實(shí)驗(yàn)和模擬相結(jié)合的手段,對(duì)該空調(diào)系統(tǒng)的控制運(yùn)行策略和室內(nèi)環(huán)境狀況進(jìn)行了分析研究。在輻射供冷與置換通風(fēng)聯(lián)合的條件下,通過(guò)對(duì)該辦公建筑中五樓室內(nèi)溫度的實(shí)時(shí)監(jiān)測(cè),以及對(duì)實(shí)驗(yàn)數(shù)據(jù)的大量分析,總結(jié)出室內(nèi)溫度分布規(guī)律為垂直方向上明顯的溫度分層。這對(duì)進(jìn)一步分析房間溫度在空間垂直方向上變化趨勢(shì)有較大的幫助。對(duì)于地板輻射,當(dāng)供水流量為工程經(jīng)驗(yàn)值20000kg/h,分水器將總的供水量平均分配到每一層時(shí),各樓層溫度存在明顯差異,并不是所有房間的溫度都能達(dá)到空調(diào)設(shè)計(jì)要求,常有高于27℃的情況。對(duì)此,提出供水流量根據(jù)室溫反饋進(jìn)行按比例調(diào)節(jié)的方案,并且通過(guò)模擬發(fā)現(xiàn)該方案能夠有效緩解各樓層溫度不均的現(xiàn)象。對(duì)于地板輻射供冷系統(tǒng)中常常會(huì)出現(xiàn)的地板結(jié)露現(xiàn)象,針對(duì)常用避免結(jié)露的兩種方法(保持相對(duì)濕度不變的情況下,降低環(huán)境空氣溫度使其露點(diǎn)溫度小于地板表面溫度;在相同送風(fēng)溫度的條件下,降低送風(fēng)濕度)通過(guò)模擬實(shí)驗(yàn)發(fā)現(xiàn)在地板輻射與置換通風(fēng)相結(jié)合的空調(diào)系統(tǒng)中降低置換通風(fēng)的相對(duì)濕度是避免地板結(jié)露最有效的方法。通過(guò)分析夏季室內(nèi)溫度的變化情況,針對(duì)異常高溫天氣提出了一種新的控制策略,并對(duì)此展開(kāi)了模擬研究:通過(guò)預(yù)測(cè)室外溫度,提前對(duì)地源井供水總流量進(jìn)行控制。該方案雖然可以起到緩沖室內(nèi)溫度大幅度升降的作用,但是由于輻射地板的熱惰性使得供冷量與供水流量變化并不成正比,而且這樣還會(huì)造成機(jī)組與泵的能耗增加。預(yù)判方案的提出雖然沒(méi)有解決異常天氣對(duì)室溫的影響,卻也證實(shí)了蓄熱地板良好的穩(wěn)定性。從本實(shí)驗(yàn)方案的提出至驗(yàn)證其不足的過(guò)程中,證實(shí)了地埋管直供復(fù)合空調(diào)系統(tǒng)中改變供水流量對(duì)室內(nèi)溫度環(huán)境狀況影響較小,對(duì)下一步的控制策略優(yōu)化會(huì)有很大的指導(dǎo)意義。
[Abstract]:The air conditioning technology of floor radiation cooling coupled displacement ventilation system is quite mature, but it is not very common in China for very successful applications. The biggest advantage of this system is that it can share the same terminal device in winter and summer. Second, the comfort of the system is better. In winter, the air conditioning environment of "head cold foot is warm" can be realized. In summer, the indoor air is mixed evenly by displacement ventilation, and the vertical temperature stratification is reduced. Maintain good indoor air quality. But this composite air conditioning system requires accurate control system, real-time monitoring and control of indoor temperature and humidity, to avoid floor surface dew, The purpose of this paper is to achieve better air conditioning effect on the basis of reducing energy consumption as far as possible. In this paper, the floor radiant cooling air conditioning system under the condition of direct supply of underground pipes is taken as the research object. Taking the air conditioning system of the office building of Jinan Antai Intelligent Engineering Co., Ltd as the model, and using the TRNSYS energy consumption simulation software as the tool, the method of combining experiment and simulation is adopted. The control operation strategy and indoor environment condition of the air conditioning system are analyzed and studied. Under the condition of radiation cooling and displacement ventilation, the indoor temperature of the fifth floor of the office building is monitored in real time. By analyzing a large number of experimental data, it is concluded that the indoor temperature distribution is obviously stratified in the vertical direction, which is helpful for further analysis of the change trend of room temperature in the space vertical direction, and for floor radiation, When the water supply flow is an engineering experience value of 200kg / h and the water separator distributes the total water supply equally to each floor, there is a significant difference in the temperature of each floor, and not all rooms can meet the requirements of air conditioning design, and often the temperature is higher than 27 鈩，

本文編號(hào)：1497608