JP5603342B2 - 液体衝撃圧力制御方法及びシステム - Google Patents
液体衝撃圧力制御方法及びシステム Download PDFInfo
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Description
本願は、2008年11月21日に出願された米国特許仮出願第61/117,029号の権益主張出願である。
Claims (22)
- 液体衝撃システムにおける固体に対する液体衝撃圧力を制御する方法であって、
ガス及び固体を含む液体衝撃システムを用意するステップを有し、ρGは、ガスの密度、κは、ガスのポリトロープ指数、ρLは、液体の密度であり、
前記システムに関するパラメータΨを計算するステップを有し、Ψは、(ρG/ρL)(κ−1)/κとして定義され、
前記システムに関する前記パラメータΨを変化させることにより前記液体衝撃圧力を調節するステップを有し、前記パラメータΨの値を増大させると、前記液体衝撃圧力が減少し、前記パラメータΨの値を減少させると、前記液体衝撃圧力が増大する、方法。 - 前記システムに関する前記パラメータΨを変化させる前記ステップは、前記システム内における前記ガスの組成を変化させるステップを含む、請求項1記載の方法。
- 前記システムに関する前記パラメータΨを変化させる前記ステップは、1)前記システム内における前記ガスの圧力を変化させるステップ、2)前記システム内における前記ガスの温度を変化させるステップ、3)前記システム内における前記液体の組成を変化させるステップ及び4)これらステップの任意の組み合わせから成る群から選択された変化ステップを含む、請求項1記載の方法。
- 前記方法は、プログラマブルコンピュータシステムによって自動的に実施される、請求項2記載の方法。
- 前記方法は、1)液体貯蔵容器システム、2)燃料容器システム、3)製造プロセスシステム、4)流体表面と接触状態になる乗物、5)燃焼システム、及び6)インクジェットシステムから成る群から選択された液体衝撃システムに適用される、請求項2記載の方法。
- 前記液体は、LNG容器内に入れられた液化天然ガス(LNG)であり、前記ガスは、前記LNG容器内のアレージガスである、請求項2記載の方法。
- 前記システムに関する前記パラメータΨを変化させる前記ステップは、前記システム内におけるエンハンスメントガスの量を増加させることにより前記アレージガスの組成を変化させるステップを含み、前記エンハンスメントガスは、ヘリウム、ネオン、窒素、メタン、アルゴン、及びこれら任意の組み合わせから成るガスの群から選択される、請求項6記載の方法。
- 前記LNG容器に設けられた放出弁に関する放出弁圧力レベルを増大させるステップを更に有する、請求項7記載の方法。
- 前記液体は、インクジェットプリンタ用カートリッジからのインクのジェットであり、前記ガスは、前記インクジェットの周りに存在する周囲ガスである、請求項3記載の方法。
- 前記液体衝撃圧力は、前記液体衝撃システムと協働関係にある固体表面の一領域に加わる力である、請求項3記載の方法。
- 前記液体は、燃料タンク内の燃料であり、前記ガスは、前記燃料タンク内のアレージガスである、請求項2記載の方法。
- 前記システムに関する前記パラメータΨを変化させる前記ステップは、前記液体充填レベルを変化させるステップを更に含む、請求項6記載の方法。
- 液体衝撃システムにおける物体に加わる液体の液体衝撃圧力を最適化するために用いられる請求項1記載の方法であって、
a)前記物体に加わる前記液体の最適液体衝撃圧力を求めるステップを有し、
b)前記液体の組成、前記ガスの組成、前記システムの温度、及び前記液体衝撃システムの気体圧力のうちの少なくとも1つから成る属性を選択するステップを有し、
c)前記システムに関するパラメータΨを求めることにより前記物体に加わる前記液体の液体衝撃圧力を計算するステップを有し、Ψは、(ρG/ρL)(κ−1)/κとして定義され、ρGは、ガスの密度、κは、ガスのポリトロープ指数、ρLは、液体の密度であり、
d)前記最適液体衝撃圧力を前記計算された液体衝撃圧力と比較するステップを有し、
e)次のステップのうちの1つを選択するステップを有し、即ち、
i)前記計算された液体衝撃圧力が前記最適液体衝撃圧力に実質的に等しくない場合、前記液体の組成、前記ガスの組成、及び前記液体衝撃システムの気体圧力のうちの少なくとも1つを調節し、そして前記ステップc)〜e)を繰り返すステップ、又は
ii)前記計算された液体衝撃圧力が前記最適液体衝撃圧力に実質的に等しい場合、前記液体の組成、前記ガスの組成、及び前記液体衝撃システムの前記気体圧力を選択するステップ、方法。 - 前記システムに関する前記パラメータΨを変化させる前記ステップは、1)前記システム内の前記ガスの圧力を変化させるステップ、2)前記システム内の前記ガスの温度を変化させるステップ、3)前記システム内における前記ガスの組成を変化させるステップ、4)前記システム内における前記液体の組成を変化させるステップ、及び5)これらステップの任意の組み合わせから成る群から選択された変化ステップを含む、請求項13記載の方法。
- 前記液体は、LNG容器内に入れられた液化天然ガス(LNG)であり、前記ガスは、前記LNG容器内のアレージガスである、請求項14記載の方法。
- 容器内における液体衝撃圧力を減少させるために用いられる請求項1記載の方法であって、
液体衝撃システムを用意するステップを有し、前記液体衝撃システムは、液体と、第1のガスと、前記液体で満たされた液体容積部及び前記第1のガスで実質的に満たされたアレージ容積部を備えた容器とを有し、前記液体は、密度(ρL)を有し、前記ガスは、密度(ρG)及びポリトロープ指数(κ)を有し、
前記システムに関するパラメータΨを求めるステップを有し、前記パラメータΨは、(ρG/ρL)(κ−1)/κとして定義され、前記パラメータΨを増大させると、その結果として、前記容器に加わる前記液体衝撃荷重が減少し、
前記システムの前記パラメータΨを増大させるステップを有し、該ステップは、前記容器内の前記第1のガスの圧力を増大させるステップ、前記第1のガスの一部分を高いパラメータΨを有する選択されたガスで置き換えるステップ、前記容器内の液体の量を増加させるステップ、前記液体量からのボイルオフの結果であるボイルオフガスの量を減少させるステップ、及びこれらステップの任意の組み合わせから成る群から選択されたステップを含む、方法。 - 前記容器内の前記液体を搬送するステップと、
前記搬送ステップ中、前記パラメータΨをモニタするステップと、
前記パラメータΨが減少したかどうかを判定するステップと、
前記パラメータΨが減少した場合に前記パラメータΨを増大させるステップとを更に有する、請求項16記載の方法。 - 前記容器内の前記液体を揚荷するステップと、
前記揚荷ステップ中、前記パラメータΨをモニタするステップと、
前記パラメータΨが減少したかどうかを判定するステップと、
前記パラメータΨが減少した場合に前記パラメータΨを増大させるステップとを更に有する、請求項16記載の方法。 - 前記液体を前記容器内に積荷するステップと、
前記積荷ステップ中、前記パラメータΨをモニタするステップと、
前記パラメータΨが減少したかどうかを判定するステップと、
前記パラメータΨが減少した場合に前記パラメータΨを増大させるステップとを更に有する、請求項16記載の方法。 - 前記方法は、プログラマブルコンピュータシステムによって自動的に実施される、請求項16記載の方法。
- 容器内の液体衝撃荷重を減少させるシステムであって、
液体衝撃システムを有し、前記液体衝撃システムは、
(i)容器内に入れられた所与の量の液体を有し、前記液体は、少なくとも密度(ρL)を有し、
(ii)前記容器内に設けられていて、少なくとも初期アレージガスを収容したアレージ容積部を有し、前記初期アレージガスは、少なくとも、密度(ρG)及びポリトロープ指数(κ)を有し、
少なくとも、前記液体の量、前記アレージ容積、前記液体密度(ρL)、前記アレージガス密度(ρG)、及び前記アレージガスポリトロープ指数(κ)を求めるよう構成されたセンサシステムを有し、
前記液体衝撃システムに関するパラメータΨを計算するよう構成された計算器を有し、前記パラメータΨは、(ρG/ρL)(κ−1)/κとして定義され、前記パラメータΨを増大させると、その結果として、前記容器内における前記液体衝撃荷重が減少し、
前記パラメータΨの値を増大させるよう前記液体衝撃システムの少なくとも1つの物理的属性を制御するよう構成された制御装置を有する、システム。 - 前記制御装置に作動的に接続されたセレクタを更に有し、前記セレクタは、低負荷アレージガスを選択するよう構成され、前記低負荷アレージガスは、前記アレージガスよりも高いパラメータΨを有するよう計算される、請求項21記載のシステム。
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