Question: The compressed-air storage tank shown in Fig. P8 - 122 has a volume of 500,000 m3, and it initially contains air at 100 kPa and

The compressed-air storage tank shown in Fig. P8 - 122 has a volume of 500,000 m3, and it initially contains air at 100 kPa and 20°C. The isentropic compressor proceeds to compress air that enters the compressor at 100 kPa and 20°C until the tank is filled at 600 kPa and 208C. All heat exchanges are with the surrounding air at 20°C. Calculate the change in the work potential of the air stored in the tank. How does this compare to the work required to compress the air as the tank was being filled?

Turbine t- Compressor Storage tank FIGURE P8-122

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