For onshore applications of WindTP, there is economic sense in installing wind turbines in groups of 7 so that 7 different primary compressors can feed a common gas circuit. Then all 7 wind turbines share one common hot-store, one common cold-store, one common main expander, one common secondary compressor, a common generator etc. etc. The slight downside to this is that pipe-runs must be made from each of 6 primary compressors on the vertices of a hexagon to a central location. These pipe-runs are heavy and expensive – but the economies achieved through having only one central set of power-conversion equipment offset this.
