Wind Velocities Are Not Constant Throughout the Day $20 \mathrm {~m}$

question 19

Essay

Wind velocities are not constant throughout the day. The daily average power produced by a wind turbine is the power averaged over the wind velocity for the day. Calculate the average power for a turbine with a diameter of $20 \mathrm {~m}$ and an efficiency of $37 \%$ if, during a 24 -hour period, the wind velocity is
- $2 \mathrm {~m} / \mathrm { s }$ for 4 hours.
- $8 \mathrm {~m} / \mathrm { s }$ for 16 hours.
- $14 \mathrm {~m} / \mathrm { s }$ for 3 hours.
- $17 \mathrm {~m} / \mathrm { s }$ for 1 hour.

---

Definitions:

Promissory Estoppel

A legal principle that prevents a promisor from denying the promise or going back on it if the promisee has reasonably relied on the promise to their detriment.

Promisee

The individual or entity to whom a promise or commitment is made in an agreement.

Reliance

Acting based on trust in something or someone, or in contract law, actions taken based on a promise or agreement.

Contract Modifications

Contract modifications are changes or amendments to the terms of an existing contract, agreed upon by all parties involved.