文(wen)章來源：中國華能(neng)集團公司 發布時間：2016-06-12
近日，華能清(qing)潔能源(yuan)研(yan)究院在三亞進行了熔(rong)(rong)(rong)鹽(yan)(yan)(yan)儲(chu)熱(re)系統蒸汽(qi)發生測試，完成了包括熔(rong)(rong)(rong)鹽(yan)(yan)(yan)熔(rong)(rong)(rong)化、系統預熱(re)、熔(rong)(rong)(rong)鹽(yan)(yan)(yan)換熱(re)及(ji)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)吹掃等在內的(de)全流程測試，并進行了連續5天的(de)熔(rong)(rong)(rong)鹽(yan)(yan)(yan)與水的(de)換熱(re)測試。經測試，該系統可(ke)產出穩定參數的(de)蒸汽(qi)，達(da)到系統設計目標(biao)(biao)，標(biao)(biao)志著清(qing)能院熔(rong)(rong)(rong)鹽(yan)(yan)(yan)儲(chu)熱(re)技(ji)術達(da)到國內領先(xian)水平。
儲(chu)熱(re)系(xi)(xi)(xi)統是太(tai)陽能(neng)(neng)熱(re)發電(dian)電(dian)站的(de)(de)重要(yao)組(zu)成(cheng)部分，通過存(cun)儲(chu)高(gao)(gao)溫(wen)(wen)介質，在需要(yao)時(shi)通過換熱(re)器產生高(gao)(gao)溫(wen)(wen)高(gao)(gao)壓蒸(zheng)汽進入汽輪(lun)機(ji)發電(dian)，消除(chu)太(tai)陽能(neng)(neng)資源自身(shen)的(de)(de)不穩定(ding)性，實現對太(tai)陽能(neng)(neng)的(de)(de)可(ke)(ke)調度利(li)用(yong)(yong)。配置適合容量的(de)(de)儲(chu)熱(re)系(xi)(xi)(xi)統，可(ke)(ke)以提高(gao)(gao)機(ji)組(zu)的(de)(de)利(li)用(yong)(yong)小時(shi)數，進一步降(jiang)低太(tai)陽能(neng)(neng)熱(re)發電(dian)的(de)(de)度電(dian)成(cheng)本。儲(chu)熱(re)系(xi)(xi)(xi)統還可(ke)(ke)以用(yong)(yong)于風電(dian)清潔供(gong)暖，將(jiang)部分時(shi)間的(de)(de)棄(qi)電(dian)用(yong)(yong)于全天供(gong)熱(re)。
清能(neng)院三亞熔(rong)(rong)鹽(yan)(yan)(yan)(yan)儲(chu)熱(re)(re)(re)系統(tong)(tong)采用(yong)25噸三元硝(xiao)酸(suan)鹽(yan)(yan)(yan)(yan)作(zuo)為(wei)儲(chu)熱(re)(re)(re)介質，儲(chu)熱(re)(re)(re)容量達到1.5兆瓦時。系統(tong)(tong)包括高溫、低溫兩個熔(rong)(rong)鹽(yan)(yan)(yan)(yan)儲(chu)罐，以(yi)及(ji)(ji)由預熱(re)(re)(re)器(qi)、蒸發器(qi)及(ji)(ji)過(guo)熱(re)(re)(re)器(qi)組(zu)成的(de)(de)蒸汽發生系統(tong)(tong)。熔(rong)(rong)鹽(yan)(yan)(yan)(yan)介質凝(ning)固點高，對換熱(re)(re)(re)器(qi)及(ji)(ji)管(guan)道的(de)(de)設計、伴熱(re)(re)(re)保溫措(cuo)施的(de)(de)可靠(kao)性(xing)有很高的(de)(de)要求(qiu)。目前國內(nei)僅有一兩套兆瓦級熔(rong)(rong)鹽(yan)(yan)(yan)(yan)儲(chu)熱(re)(re)(re)裝(zhuang)置投入(ru)運行，該(gai)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)儲(chu)熱(re)(re)(re)系統(tong)(tong)直接用(yong)熔(rong)(rong)鹽(yan)(yan)(yan)(yan)與給水換熱(re)(re)(re)產(chan)生過(guo)熱(re)(re)(re)蒸汽，在國內(nei)處于領先水平。清能(neng)院將利用(yong)該(gai)儲(chu)熱(re)(re)(re)系統(tong)(tong)進(jin)行持續測試，驗證系統(tong)(tong)長期運行的(de)(de)可靠(kao)性(xing)，并基(ji)于該(gai)平臺(tai)開展熔(rong)(rong)鹽(yan)(yan)(yan)(yan)為(wei)介質的(de)(de)線性(xing)菲涅(nie)爾技術的(de)(de)研發。