JP2018537629A - 圧力降下ステーションのための制御システムおよび方法 - Google Patents
圧力降下ステーションのための制御システムおよび方法 Download PDFInfo
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Abstract
Description
熱交換器および膨張機を通してガスを供給するステップと、
膨張機内でガスを第1の圧力から第2の圧力に膨張させ、膨張機により機械的動力を発生させるステップと、
熱伝達回路内を循環し、かつ、ガスおよびヒートポンプによって処理された作動流体と熱交換関係にある熱伝達流体を介してヒートポンプから熱を供給することによって、熱交換器内のガスを加熱するステップと、
熱伝達回路内の熱伝達流体の流量を、熱伝達流体からガスに伝達される発熱率の関数として、特に、熱交換器のガス入口側およびガス出口側におけるガスと熱伝達流体との間の温度差の関数として、変調するステップと
を含む。
ΔTa=(T3−T2)=(T4−T1)=ΔTb
である場合には、所与のガス流量に対する最適な動作条件が達成できることが発見されている。
ΔTa=(T3−T2)<(T4−T1)=ΔTb
である場合には、流量制御信号Efは流量を減少させることができ、その逆も可能である。
3 高圧ガス輸送パイプライン
5 低圧ガス分配網
7 パイプライン、ガス流路
9 熱交換器
11 膨張機
13 膨張機シャフト
15 発電機
17 配電網
19 熱伝達回路
21 ポンプ
23 トランスクリティカルヒートポンプ
23C 内部ヒートポンプコントローラ
25 作動流体回路
27 熱交換器
29 向流熱交換器
31 膨張バルブ
33 圧縮機、ポンプ
35 電動モータ
37 ガス供給ダクト、ガス流路、供給経路
39 圧力制御バルブ装置
41 ヒータ装置、ヒータ
43 ヒータ
45 二次熱伝達回路
47 熱交換器
51 コントローラ
Claims (17)
- パイプライン(7)内のガスを減圧するためのシステム(1)であって、
ガスを第1の圧力から第2の圧力に膨張させることによって機械的動力を発生させるように構成され配置された膨張機(11)であって、前記第1の圧力は前記第2の圧力よりも高い、膨張機(11)と、
ヒートポンプ(23)と、
前記ヒートポンプ(23)から熱を受け取り、熱交換器(9)を介して前記ガスに熱を供給するために、内部で循環する熱伝達流体を収容する熱伝達回路(19)と、
前記熱伝達回路(19)内を循環する前記熱伝達流体の流量を、前記熱伝達流体から前記ガスに伝達される発熱率の関数として、特に、前記熱交換器(9)のガス入口側およびガス出口側における前記ガスと前記熱伝達流体との間の温度差の関数として、変調するように構成され配置されたコントローラ(51)と
を含むシステム(1)。 - 前記熱交換器(9)は、前記パイプライン(7)内の前記ガスの流れの方向に関して前記膨張機(11)の上流に配置される、請求項1に記載のシステム(1)。
- 前記ヒートポンプ(23)は、トランスクリティカルヒートポンプである、請求項1または2に記載のシステム(1)。
- 前記コントローラ(51)は、前記熱交換器(9)の前記入口および前記出口におけるガス温度を測定し、かつ、前記熱交換器(9)の前記入口および前記出口における熱伝達流体温度をさらに測定するように配置され構成された温度センサに機能的に接続される、請求項1乃至3のいずれか1項または複数の項に記載のシステム(1)。
- 前記コントローラ(51)は、前記熱交換器(9)の前記ガス入口におけるガスと熱伝達流体との間の第1の温度差と、前記熱交換器(9)の前記ガス出口における前記ガスと前記熱伝達流体との間の第2の温度差と、の差を最小にするように、前記熱伝達流体の前記流量を変調するように構成された流量制御ループを特徴とする、請求項1乃至4のいずれか1項または複数の項に記載のシステム(1)。
- 前記流量制御ループは、前記ヒートポンプ(23)の前記COPを最大にするように、前記熱伝達回路(19)内の前記熱伝達流体の前記流量を変更するように構成される、請求項5に記載のシステム(1)。
- 前記コントローラ(51)は、前記熱伝達流体から前記ガスへの前記発熱率に作用することによって、前記膨張機(11)の下流のガス温度とガス温度設定点との間の差を最小にするように配置され構成された温度制御ループを特徴とする、請求項1乃至6のいずれか1項または複数の項に記載のシステム(1)。
- 前記コントローラ(51)は、前記膨張機(11)を通る前記ガス流量に作用することによって、前記膨張機(11)の下流のガス圧力とガス圧力設定点との間の差を最小にするように配置され構成された圧力制御ループを特徴とする、請求項1乃至7のいずれか1項または複数の項に記載のシステム(1)。
- 前記膨張機(11)は、可変入口ガイドベーンを有し、前記コントローラ(51)は、前記可変入口ガイドベーンに作用することによって、前記膨張機(11)を通るガス流量を調節するように構成され配置される、請求項1乃至8のいずれか1項または複数の項に記載のシステム(1)。
- 前記膨張機(11)および前記熱交換器(9)と並列に配置されたガス供給ダクト(37)をさらに含み、前記ガス供給ダクト(37)に沿って、圧力制御バルブ装置(39)およびヒータ(43)が配置され、前記ヒータ(43)は、好ましくは、前記ガス供給ダクト(37)内の前記ガス流方向に関して前記圧力制御バルブ装置(39)の上流に配置され、前記圧力制御バルブ装置(39)は、好ましくは、並列に配置された複数の圧力制御バルブからなる、請求項1乃至9のいずれか1項または複数の項に記載のシステム(1)。
- パイプライン(7)内のガスを減圧するための方法であって、
熱交換器(9)および膨張機(11)を通してガスを供給するステップと、
熱伝達回路(19)内を循環し、かつ、前記ガスおよびヒートポンプ(23)によって処理された作動流体と熱交換関係にある熱伝達流体を介して前記ヒートポンプ(23)から熱を供給することによって、前記熱交換器(9)内の前記ガスを加熱するステップと、
前記膨張機(11)内で前記ガスを第1の圧力から第2の圧力に膨張させ、前記膨張機(11)により機械的動力を発生させるステップと、
前記熱伝達回路(19)内の前記熱伝達流体の流量を、前記熱伝達流体から前記ガスに伝達される発熱率の関数として、特に、前記熱交換器(9)のガス入口側およびガス出口側における前記ガスと前記熱伝達流体との間の温度差の関数として、変調するステップと
を含む方法。 - 前記ヒートポンプ(23)は、トランスクリティカルヒートポンプである、請求項11に記載の方法。
- 前記熱交換器(9)内の前記ガスを加熱する前記ステップは、前記膨張機(11)内の前記ガスを膨張させる前記ステップの前に実行され、前記熱交換器(9)は、ガス流方向に関して前記膨張機(11)の上流に配置される、請求項11または12に記載の方法。
- 前記熱伝達流体の前記流量を、前記熱交換器(9)のガス入口側およびガス出口側における前記ガスと前記熱伝達流体との間の温度差の関数として変調するステップを含む、請求項11乃至13のいずれか1項または複数の項に記載の方法。
- 前記熱交換器(9)の前記ガス入口におけるガスと熱伝達流体との間の第1の温度差と、前記熱交換器(9)の前記ガス出口における前記ガスと前記熱伝達流体との間の第2の温度差と、の差を最小にするように、前記熱伝達流体の前記流量を変調するステップを含む、請求項11乃至14のいずれか1項または複数の項に記載の方法。
- 前記熱伝達流体から前記ガスへの前記発熱率に作用することによって、前記膨張機(11)の下流のガス温度とガス温度設定点との間の差を最小にするステップを含む、請求項11乃至15のいずれか1項または複数の項に記載の方法。
- 前記パイプライン(7)内の前記ガス流量に作用することによって、前記膨張機(11)の下流のガス圧力とガス圧力設定点との間の差を最小にするステップを含む、請求項11乃至16のいずれか1項または複数の項に記載の方法。
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