發(fā)布時間：2018-03-23 17:00

  本文選題：有機(jī)-無機(jī)相變材料　切入點：相變潛熱　出處：《包裝工程》2017年09期

【摘要】：目的獲得有效改善過冷,同時保持較高潛熱、性能穩(wěn)定的混合相變儲能材料。方法分別制備不同質(zhì)量比的硬脂酸/Mg(NO_3)_2·6H_2O、硬脂酸/Na_2HPO_4·12H_2O的混合材料,使用高低溫交變箱測試長期循環(huán)性能,用溫度記錄儀測其步冷曲線,得到相變溫度和過冷度,再使用參比溫度曲線法對相變材料循環(huán)前后的相變潛熱進(jìn)行測試比較。結(jié)果硬脂酸/Na_2HPO_4·12H_2O混合材料的過冷度降低至3℃左右,經(jīng)300次融化/凝固循環(huán)后過冷度維持恒定,潛熱衰減率在20%以內(nèi)。結(jié)論采用結(jié)構(gòu)相似的2種混合相變材料均可改善無機(jī)水合鹽的過冷度。硬脂酸與Mg(NO_3)_2·6H_2O相容性不佳,相變潛熱的衰減加劇,循環(huán)穩(wěn)定性變差,而硬脂酸與Na_2HPO_4·12H_2O的相容性良好,性能表現(xiàn)穩(wěn)定,是一種良好的儲能材料。
[Abstract]:Objective to obtain a mixture of phase change energy storage materials which can effectively improve undercooling while keeping high latent heat and stable performance. Methods the mixture of stearic acid / MgS / no _ 3 and stearic acid / / na _ 2HPO _ 4 12H_2O was prepared respectively, and the long-term cycling performance was tested by using a high and low temperature alternating box. The step cooling curve was measured with a temperature recorder, and the phase transition temperature and undercooling degree were obtained. The latent heat of phase change before and after the phase change material cycle was measured and compared by using the reference temperature curve method. The results showed that the undercooling degree of the stearic acid / Na2HPO4 12H_2O mixed material was reduced to about 3 鈩，

本文編號：1654356