311 Compression

Although several compressor designs are available, most GTs utilize multistage axial designs, which produce a higher compression ratio than centrifugal designs. Figure 3.2 shows typical compressor efficiency for two staging options. GTs with high pressure ratios can use an intercooler to cool the air between stages of compression, allowing more fuel to be combusted and generating more power. The limiting factor on fuel input is the temperature of the hot gas created and the resultant impact on the metallurgy of the firststage nozzle and turbine blades. With advances in materials, however, this limiting factor is gradually being reduced.

New Potential Operating Point

Restaged Compressor

FLOW

Typical Isentropic Efficiency, %

Operating Point

New Potential Operating Point

Restaged Compressor

FLOW

002-324M

FIGURE 3.2

Gas compressor efficiency.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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