JP5736594B2 - 低温流体輸送配管または低温流体貯蔵庫、あるいはその塗装外装材 - Google Patents
低温流体輸送配管または低温流体貯蔵庫、あるいはその塗装外装材 Download PDFInfo
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/141—Arrangements for the insulation of pipes or pipe systems in which the temperature of the medium is below that of the ambient temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
Description
[1]低温流体が流れるかまたは貯えられるための空間と、前記空間を囲う保冷材と、前記保冷材を覆っており、外装表面に塗膜を有する塗装外装材と、を有する低温流体輸送配管または低温流体貯蔵庫であって、
前記塗膜表面の凹凸の算術平均粗さをRaとし、凹凸の平均うねり間隔をSmとしたときに、Sm > 45μm であり、かつ下記式(1)により求められる対流熱伝達率hc(W/m2/K)が6.7以上である、低温流体輸送配管または低温流体貯蔵庫。
hc= 6.2793 + 0.0568Ra + 0.000627Sm・・・(1)
[3]日射反射率が0.2以上である、[1]に記載の低温流体輸送配管または低温流体貯蔵庫。
[4]低温流体輸送配管または低温流体貯蔵庫のための塗装外装材であって、
前記塗装外装材の外装表面に形成された塗膜表面の凹凸の算術平均粗さをRaとし、凹凸の平均うねり間隔をSmとしたときに、Sm > 45μm であり、かつ下記式(1)により求められる対流熱伝達率hc(W/m2/K)が6.7以上である、塗装外装材。
hc= 6.2793 + 0.0568Ra + 0.000627Sm・・・(1)
hc= 6.2793 + 0.0568Ra + 0.000627Sm ・・・(1)
下塗り塗膜を形成した表面に、上塗り塗料としてポリエステル系縮み塗料を塗装した。100重量部のポリエステル樹脂(分子量3000)と、30重量部のメチル化メラミンと、ドデシルベンセンスルホン酸0.6重量部とジ-n-ブチルアミン2.4重量部とを室温で混合して得た反応混合物3重量部を有機溶剤に溶解してベース塗料(a)を得た。色調をグレーとするため、ベース塗料(a)に着色顔料を添加して分散し、ポリエステル系縮み塗料を得た。
添加した着色顔料には、塗料固形分中の比率で、酸化チタン(平均粒径 0.23μm)を38重量%、カーボンブラック(平均粒径 0.02μm)を0.5重量%、酸化鉄(黄)(平均粒径 0.09μm)を0.3重量%、フタロシアニンブルー(平均粒径 0.05μm)を0.1重量%となるよう配合した。
試験体Aの作製において、焼付け時の板面風速を7m/秒としたこと以外は、試験体Aと同様の手順で試験体Eを得た。板面風速を制御することで、異なる縮み柄を形成し、算術平均粗さRaおよび平均うねり間隔Smを変えた(試験体Aと試験体Eとの比較など)。
試験体Aに使用したグレー色のポリエステル系縮み塗料に、表1に示したように、さらに骨材を添加して塗料を調製した。骨材には、平均粒径30μmのポリアクリロニトリル粒子(東洋紡株式会社製 タフチックYK−30)、または平均粒径20μmのガラスビーズ(ポッターズ・バロティーニ株式会社製 EGB731)を使用した。焼付け時のオーブン内での板面風速は、表1に示す条件で実施した。塗膜の平均膜厚はいずれも22μmであった。
下塗り塗膜を形成した表面に、通常の平滑な塗膜を得るためのポリエステル系塗料を塗布した。100重量部のポリエステル樹脂(分子量3000)と、10重量部のメチル化メラミンおよび40重量部のブチル化メラミンを有機溶剤に溶解してベース塗料(b)を作製した。さらに、色調をグレーとするため、ベース塗料(b)に着色顔料を添加して分散し、ポリエステル系塗料を得た。添加した着色顔料の配合は、ベース塗料(a)に添加された着色顔料と同様とした。
試験体Hに使用したグレー色のポリエステル系塗料に、表1に示したように、さらに骨材を添加して塗料を調製した。調製した塗料を、試験体Hと同様に、下塗り塗膜に塗布・焼付けて塗膜を形成した。骨材には、平均粒径30μmのポリアクリロニトリル粒子(東洋紡株式会社製 タフチックYK−30)を使用した。塗膜の平均膜厚は、20μmであった。
ベース塗料(b)に、平均粒径16μmのアルミフレーク(昭和アルミパウダー株式会社製 561ER)を、塗料固形分中の比率で11重量%添加し、シルバーの色調とした塗料を調製した。試験体Hと同様に塗布・焼付けて試験体Lを得た。平均膜厚は20μmであった。
ベース塗料(a)に、平均粒径16μmのアルミフレーク(昭和アルミパウダー株式会社製 561ER)を、塗料固形分中の比率で11重量%添加し、シルバーの色調とした塗料を調製した。試験体Aと同様に塗布・焼付けて試験体Mを得た。板面風速は2m/秒とした。平均膜厚は22μmであった。
試験体Nには、板厚0.2mmのアルミニウム板をそのまま使用した。
2 地面
3 工場
11 流路または貯蔵空間
21 保冷材
31 外装材
32 試験体
41 外気
42 温度境界層
43 空気層
51 温調装置
61 放射制御板
71 シリコンシート
72 熱伝導性グリース
θsi 温調装置の温調表面温度
θse 試験体の外装表面温度
θa 空気層の温度
θb 放射制御板の温度
qi 温調装置から試験体への熱流
qra 大気から試験体への放射熱流
qrb 放射制御板から試験体への放射熱流
qc 大気から試験体への対流伝熱
ε 外装材の赤外放射率
εa 大気の赤外放射率
εb 放射制御板の赤外放射率
λ 保冷材の熱伝導率
λa 大気の熱伝導率
hse 全表面熱伝達率
hr 放射熱伝達率
hc 対流熱伝達率
Rsol 日射反射率
Claims (4)
- 低温流体が流れるかまたは貯えられるための空間と、前記空間を囲う保冷材と、前記保冷材を覆っており、外装表面に塗膜を有する塗装外装材と、を有する低温流体輸送配管または低温流体貯蔵庫であって、
前記塗膜表面の凹凸の算術平均粗さR a が7μmよりも大きく、凹凸の平均うねり間隔S m が60μmよりも大きい、低温流体輸送配管または低温流体貯蔵庫。 - 前記塗装外装材は塗装外装鋼板である、請求項1に記載の低温流体輸送配管または低温流体貯蔵庫。
- 日射反射率が0.2以上である、請求項1に記載の低温流体輸送配管または低温流体貯蔵庫。
- 低温流体輸送配管または低温流体貯蔵庫のための塗装外装材であって、
前記塗装外装材の外装表面に形成された塗膜表面の凹凸の算術平均粗さR a が7μmよりも大きく、凹凸の平均うねり間隔S m が60μmよりも大きい、塗装外装材。
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