本文選題：聚光光伏 + 液浸冷卻　； 參考：《天津大學》2014年博士論文

【摘要】：聚光光伏（CPV）發(fā)電技術(shù)能夠有效的提高光伏系統(tǒng)發(fā)電效率，降低光伏系統(tǒng)發(fā)電成本，近年來越來越受到人們的重視。但是，如何有效地實現(xiàn)聚光太陽電池的冷卻是聚光光伏發(fā)電系統(tǒng)設(shè)計中的一個難點。針對傳統(tǒng)聚光光伏冷卻方式的不足，提出把直接接觸式液浸冷卻技術(shù)用于聚光光伏系統(tǒng)，并以線性聚光光伏為應用實例，建立了線性液浸聚光光伏冷卻系統(tǒng)，從如下方面對其性能進行了實驗研究和模擬分析。 1、研究了二甲基硅油液膜厚度對太陽電池電性能的影響。結(jié)果表明：與無液浸液體時電池電性能相比，一定厚度的薄液膜液浸能夠提高聚光硅電池和聚光三結(jié)砷化鎵電池的電性能；但電池正面有液浸液體存在時，電性能隨液膜厚度的增加而下降，因此較薄的電池正面的液膜厚度有利于電池電性能的提高。 2、設(shè)計了線性條形平面鏡聚光系統(tǒng)，通過幾何關(guān)系推導得出：聚光器相鄰鏡片互不遮擋時的最小安裝間距隨鏡片位置角和陽光入射角的增大而增大，當陽光入射角和接收器安裝角度均為45°時，最小安裝間距為鏡片寬度的1.414倍；通過實驗測量得出由24片鏡片組成的聚光器原型的聚光比為12.90X。 3、設(shè)計了矩形窄縫流道接收器，對其性能實驗研究表明：聚光比為9.61X、太陽直射輻照度（DNI）920W/m2、硅油進口15℃條件下，當接收器電池段雷諾準數(shù)Re范圍在1671~8359時，組件平均溫度31~20℃，對流傳熱系數(shù)280~1000W/(m2K)；經(jīng)270天二甲基硅油長期液浸后聚光硅電池電性能沒有發(fā)生衰減。 4、建立了矩形窄縫流道接收器的數(shù)值模型，，模擬分析表明：電池組件最優(yōu)安裝位置為流道高度方向上的中間位置，接收器進、出口段長度對電池溫度影響不大，流道高度越小越有利于獲得好的傳熱性能，但流動阻力也越大，流道的優(yōu)化高度為10mm；通過擬合分析得到了接收器對流傳熱系數(shù)和摩擦系數(shù)關(guān)聯(lián)式。 5、設(shè)計了用于液浸液體冷卻的二甲基硅油-甲醇物系液液直接接觸相變換熱實驗，實驗結(jié)果表明：升液管軸向溫度隨高度增加呈先降低然后趨于穩(wěn)定的趨勢，升液管體積傳熱系數(shù)能夠達到22~34kW/(m3K)，平均氣含率能夠達到0.05~0.5，此氣含率范圍內(nèi)，以甲醇蒸氣氣提為推動力的條件下，在具有優(yōu)化結(jié)構(gòu)的矩形窄縫液浸接收器中能夠?qū)崿F(xiàn)硅油在接收器電池段Re范圍在1500~7500。
[Abstract]:In recent years, more and more attention has been paid to the technology of concentrated photovoltaic (CPV) generation, which can effectively improve the efficiency of photovoltaic system and reduce the cost of photovoltaic system.However, how to effectively realize the cooling of concentrated solar cells is a difficult point in the design of concentrated photovoltaic power generation system.Aiming at the shortage of traditional condensing photovoltaic cooling method, the direct contact liquid immersion cooling technology is put forward for the concentrated photovoltaic system. Taking linear concentrated photovoltaic as an application example, a linear liquid-immersed photovoltaic cooling system is established.Experimental research and simulation analysis of its performance are carried out in the following aspects.1. The effect of the thickness of dimethyl silicon oil film on the electrical properties of solar cells was studied.The results show that compared with the battery without liquid immersion, a certain thickness of thin liquid film liquid immersion can improve the electrical performance of the condensed silicon battery and the condensed trijunction GaAs battery, but when the liquid immersion liquid exists on the front of the battery,The electric performance of the battery decreases with the increase of the film thickness, so the thin film thickness on the front of the battery is beneficial to the improvement of the electric performance of the battery.2. The linear strip plane mirror condensing system is designed. Through the derivation of geometric relation, it is concluded that the minimum installation distance increases with the increase of lens position angle and sunlight incidence angle when the adjacent lenses of the concentrator are not occluded.When the incidence angle and the installation angle of the receiver are both 45 擄, the minimum mounting distance is 1.414 times of the width of the lens, and the ratio of the condenser made up of 24 lenses is 12.90X.3. The rectangular narrow slit channel receiver is designed. The experimental results show that the average temperature of the receiver is 3120 鈩

本文編號：1753255