Ch 7. Exergy Analysis Multimedia Engineering Thermodynamics Exergy ExergyChange ExergyBalance(1) ExergyBalance(2)
 Chapter 1. Basics 2. Pure Substances 3. First Law 4. Energy Analysis 5. Second Law 6. Entropy 7. Exergy Analysis 8. Gas Power Cyc 9. Brayton Cycle 10. Rankine Cycle Appendix Basic Math Units Thermo Tables Search eBooks Dynamics Fluids Math Mechanics Statics Thermodynamics Author(s): Meirong Huang Kurt Gramoll ©Kurt Gramoll

 THERMODYNAMICS - CASE STUDY Introduction Windmill Capturing the Work Potential in Wind Since wind power is a renewable energy source, a small town considering using windmills to meet the extra power needs at peak periods. What is known: Windmills will be installed at a location where the wind blows steadily at an average velocity of 15 m/s. The windmills will have 5-m-radius rotors. The extra power needs is 1,000 kW. Question Determine the minimum number of windmills that need to be installed. Approach A perfect windmill will bring the air to a complete stop (dead state) and capture all the work potential the air processes.