中国造船
中國造船
중국조선
SHIPBUILDING OF CHINA
2014年
2期
132-139
,共8页
罗肖锋%范洪军%张晖%甘少炜%刘东进
囉肖鋒%範洪軍%張暉%甘少煒%劉東進
라초봉%범홍군%장휘%감소위%류동진
LNG%蒸发%泄漏%承接池%隔热%泡沫玻璃砖
LNG%蒸髮%洩漏%承接池%隔熱%泡沫玻璃磚
LNG%증발%설루%승접지%격열%포말파리전
LNG%vaporization%spill%drip tray%thermal insulation%foam glass block
设计了一种新型船用液化天然气（LNG）泡沫玻璃砖承接池。为了掌握其隔热性能，从安全角度考虑，采用液氮（LN2）作为试验介质进行承接池隔热性能试验。在相同环境条件下对比LNG和LN2的自然蒸发特性。结果表明，LNG的自然蒸发速度低于LN2，且蒸发过程的温度变化、蒸发速率变化等特性与LN2差异较大。根据试验现象，分析混合液体 LNG 蒸发特性的特殊性，验证了使用 LN2作为试验介质的可行性。承接池隔热性能试验模型的隔热层采用50cm（方案1）和30cm（方案2）两种方案，并进行了有限元对流传热计算。计算结果显示两个模型均可达到隔热要求。方案1的试验持续时间约为14h，方案2的试验持续时间约为23h。试验结果表明，隔热层厚度较薄的方案2已能满足船体钢结构的隔热要求，但应注意隔热层泡沫玻璃砖的铺设规范。
設計瞭一種新型船用液化天然氣（LNG）泡沫玻璃磚承接池。為瞭掌握其隔熱性能，從安全角度攷慮，採用液氮（LN2）作為試驗介質進行承接池隔熱性能試驗。在相同環境條件下對比LNG和LN2的自然蒸髮特性。結果錶明，LNG的自然蒸髮速度低于LN2，且蒸髮過程的溫度變化、蒸髮速率變化等特性與LN2差異較大。根據試驗現象，分析混閤液體 LNG 蒸髮特性的特殊性，驗證瞭使用 LN2作為試驗介質的可行性。承接池隔熱性能試驗模型的隔熱層採用50cm（方案1）和30cm（方案2）兩種方案，併進行瞭有限元對流傳熱計算。計算結果顯示兩箇模型均可達到隔熱要求。方案1的試驗持續時間約為14h，方案2的試驗持續時間約為23h。試驗結果錶明，隔熱層厚度較薄的方案2已能滿足船體鋼結構的隔熱要求，但應註意隔熱層泡沫玻璃磚的鋪設規範。
설계료일충신형선용액화천연기（LNG）포말파리전승접지。위료장악기격열성능，종안전각도고필，채용액담（LN2）작위시험개질진행승접지격열성능시험。재상동배경조건하대비LNG화LN2적자연증발특성。결과표명，LNG적자연증발속도저우LN2，차증발과정적온도변화、증발속솔변화등특성여LN2차이교대。근거시험현상，분석혼합액체 LNG 증발특성적특수성，험증료사용 LN2작위시험개질적가행성。승접지격열성능시험모형적격열층채용50cm（방안1）화30cm（방안2）량충방안，병진행료유한원대류전열계산。계산결과현시량개모형균가체도격열요구。방안1적시험지속시간약위14h，방안2적시험지속시간약위23h。시험결과표명，격열층후도교박적방안2이능만족선체강결구적격열요구，단응주의격열층포말파리전적포설규범。
A new type of onboard LNG drip tray with foam glass blocks as thermal insulation layer was designed. In order to have a full picture of the thermal insulation performance, a set of experiments was conducted. Liquid nitrogen (LN2) was used as a safer analogue of LNG. To verify the feasibility in using LN2, the vaporization characteristics of LNG and LN2 was compared in same environmental conditions. The results showed that the vaporization rate of LNG was lower than of LN2, but the change of temperature and vaporization rate of LNG is quite different from that of LN2. According to the phenomenon in the experiment, vaporization characteristics of LNG were analyzed, and the feasibility of using LN2 in place of LNG was proved. Two models were designed, and corresponding thermal insulation performance experiments were conducted. The insulation layer thickness of the model 1 was 50cm, and that of model 2 was 30cm. Calculations of convective heat transfer showed that both models could meet thermal insulation requirement. For model 1, the experiment duration was about 14h, and for model 2, the experiment duration was approximately 23h. Experiments results showed that both models could meet thermal insulation requirement. The model 2 with a thin insulating layer (30cm) were recommended, but special laying requirements of the foam glass blocks should be considered.
