【摘要】：隨著經(jīng)濟的快速發(fā)展和人們生活質量的提高,我國建筑能耗的數(shù)量逐年上升。建筑能耗中制冷和供暖約占建筑總能耗的15%。面對數(shù)量如此巨大的能耗,降低空調能耗是勢在必行的。太陽能在節(jié)約建筑能耗方面具有很大的潛力,利用太陽能可以滿足生活用水和室內供暖這類建筑能耗的需求。本課題利用太陽能,以分離式熱管為傳熱元件,微通道作為室內散熱器,提出一種微通道散熱器分離式熱管太陽能供熱系統(tǒng),對房間進行供暖,實現(xiàn)了建筑一體化。與傳統(tǒng)熱管相比,分離式熱管可以遠距離傳輸熱量,布置靈活,將微通道換熱器作為室內散熱裝置,可以獲得更高的效率和室內舒適性。該系統(tǒng)最大的特點是僅利用太陽能和熱管內工質的相變循環(huán),即可實現(xiàn)建筑采暖,可以大大減少冬季建筑采暖能耗。在搭建的分離式熱管太陽能室內供熱系統(tǒng)試驗臺上,針對南京地區(qū)冬季氣候特征,于2016年12月進行了實驗測試。針對以下主要內容進行研究:(1)室內散熱裝置不同時系統(tǒng)性能研究。連續(xù)四天測試不同太陽輻射強度下系統(tǒng)散熱量、室內溫度等參數(shù),與常規(guī)散熱器供熱系統(tǒng)進行性能對比。結果表明,微通道散熱器供熱系統(tǒng)的熱工性能均處在較好水平,室內溫度達到18℃以上,供熱時間5小時,是很好的輔助室內供熱裝置。(2)針對不同太陽輻射強度下對比系統(tǒng)熱工性能的影響進行分析研究。結果發(fā)現(xiàn):太陽輻射強度對系統(tǒng)散熱量、熱效率、集熱器進出口溫差影響較大,三者隨輻照強度增大而增大,但增加趨勢變緩;系統(tǒng)各參數(shù)變化趨勢相比于太陽輻射強度有滯后,滯后約30分鐘;在冬季天氣狀況良好的寒冷條件下,微通道散熱器供熱系統(tǒng)熱效率達42%以上。(3)針對不同風量下對微通道散熱器供熱系統(tǒng)熱工性能的影響進行了分析研究,結果發(fā)現(xiàn):風量對微通道散熱器供熱系統(tǒng)散熱量、系統(tǒng)熱效率、集熱器進出口溫差方面影響較大。三者隨風量的增大而增大,但由于換熱時間縮短,增大趨勢變緩。風量的改變對室內溫度影響較小,室內溫度在18℃以上,滯后室外溫度變化約1小時。風量較小時,散熱器表面溫度較高,但隨著風量增大,對表面溫度的影響變小。
[Abstract]:With the rapid development of economy and the improvement of people's quality of life, the quantity of building energy consumption in China is increasing year by year. In building energy consumption, refrigeration and heating account for about 15% of total building energy consumption. In the face of such a large number of energy consumption, it is imperative to reduce the energy consumption of air conditioning. Solar energy has great potential in saving building energy consumption. Solar energy can meet the needs of building energy consumption such as domestic water and indoor heating. Using solar energy as heat transfer element and microchannel as indoor radiator, this paper presents a separate heat pipe solar heating system for micro channel radiator, which can heat the room and realize the integration of architecture. Compared with the traditional heat pipe, the separated heat pipe can transfer heat over long distance, and the arrangement is flexible. Using the micro-channel heat exchanger as the indoor heat dissipation device, it can obtain higher efficiency and indoor comfort. The biggest characteristic of this system is that only using the phase change cycle of working fluid in solar energy and heat pipe can realize the building heating and can greatly reduce the energy consumption of building heating in winter. An experimental test was carried out in December 2016 on a separate heat pipe solar indoor heating system test rig for the winter climate in Nanjing area. The main contents are as follows: (1) the system performance of indoor heat dissipation device is studied at different time. The heat emission and indoor temperature of the system under different solar radiation intensities were measured for four consecutive days, and the performance of the system was compared with that of the conventional radiator heating system. The results show that the thermal performance of the micro-channel radiator heating system is at a good level, the indoor temperature is above 18 鈩，

本文編號：2318319