真空熱試驗(yàn)中冷能利用的思考
The Utilization of Cold Energy in Vacuum Thermal Test
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摘要: 在大型航天器的真空熱試驗(yàn)中，僅從過(guò)冷器排除的液氮和低溫氣氮的混合物就達(dá)約5×104 kg，其中蘊(yùn)涵了108 kJ量級(jí)的冷能。文章首先介紹了自然冷能和LNG冷能利用的研究現(xiàn)狀，并結(jié)合航天器真空熱試驗(yàn)的實(shí)際情況，研究了試驗(yàn)過(guò)程中排氣造成的冷能損失，對(duì)它的再利用可行性進(jìn)行了討論，提出可以采用聯(lián)合法冷能回收流程，并提出了冷能利用中的幾個(gè)關(guān)鍵問(wèn)題。認(rèn)為：需要解決液氮和低溫氣氮供應(yīng)的連續(xù)性及找到恰當(dāng)?shù)亩卫涿剑钦婵諢嵩囼?yàn)中冷能利用的關(guān)鍵。Abstract: About 5×104 kg mixture is removed from the supercooler in the vacuum thermal test of spacecraft, carrying 108 kJ of cold energy. After an introduction of the status in using natural cold energy and LNG cold energy, this paper proposes a combined cycle reclaim method on the utilization of LN2 and GN2 mixture, which can be used in the vacuum thermal test, and the key points are the supply continuity of LN2 and GN2 and how to develop a secondary cold intermedium.
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