(ZA9700836-A)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.    (GB2324342-A)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.    (EP877861-A1)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.    (CN1212746-A)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.    (GB2345731-A)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.    (GB2324342-B)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.    (GB2345731-B)      The hydroelectric power generation plant has an underground turbine hall (2) containing turbines and generators (4,6). A penstock (8) connects the source of water to the hall and water used in the turbine flows away via a tailrace (10).    The lower end of the tailstock is a helically curved tubular portion (12) curving in three dimensions. The swirling flow leads to reduced head losses and allows the hall to be close to the water storage area without use of a planar elbow bend.    USE/ADVANTAGE -   For pump plant for pumped storage system. Provides reduced head losses, allows hall to be close to water storage area while avoiding a planar elbow bend and enables a deeper foundation cut-off depth at upstream end of dam to give reduced under-dam leakage.