Profit analysis of ouagadougou compressed air energy storage power station

What is the exergy efficiency of a compressed air energy storage system?

In the exergy analysis, the results indicate that the exergy efficiency of the compressed air energy storage subsystem is 80.46 %, which is 16.70 % greater than the 63.76 % of the reference compressed air energy storage system, showing that the system integration can decline the exergy loss.

How much does a compressed air energy storage system cost?

In the economic analysis, the results indicate that the compressed air energy storage subsystem requires an equipment investment cost of 256.45 k$. The dynamic payback period spans 4.20 years, as well as the net present value reaches 340.48 k$, showing that the system integration has a good economic performance.

How much CO2 does a compressed air energy storage system emit?

Besides, the proposed system’s CO 2 emission is 258 kg/GWh. This study provides a new option for enhancing the performance of compressed air energy storage through the system integration.

How COM1 & COM2 are used in the energy storage process?

In the energy storage process, COM1 and COM2 consume electrical energy to compress air, and two HXs (HX1 and HX2) are employed to lower the compressed air's temperature. HX1 and HX2 employ feedwater from the FWP outlet as the cooling medium. The cryogenic compressed air from HX2 is stored in the ASV.

How does air storage pressure affect a CAES subsystem?

As a result, the CAES subsystem's energy output grows at a slower rate than the energy input in a cycle, resulting in a reduction of the CAES subsystem's RTE as the air storage pressure increases. As the air storage pressure rises, the compressed air density also goes up, resulting in a smaller volume of the ASV.

What is compressed air energy storage?

Compressed air energy storage (CAES) is one of the many energy storage options that can store electric energy in the form of potential energy (compressed air) and can be deployed near central power plants or distribution centers. In response to demand, the stored energy can be discharged by expanding the stored air with a turboexpander generator.