Chemistry In Focus
Chemistry In Focus
6th Edition
ISBN: 9781305084476
Author: Tro, Nivaldo J., Neu, Don.
Publisher: Cengage Learning
bartleby

Videos

Question
Book Icon
Chapter 10, Problem 10.1YT
Interpretation Introduction

Interpretation:

The percent efficiency of the tower is to be calculated.

Concept Introduction:

Hundreds of sun-tracking mirrors, called heliostats, form a tower.

The percent efficiency of heliostats is given by:

% efficiency=Output powerInput power×100%

Expert Solution & Answer
Check Mark

Answer to Problem 10.1YT

Solution: 22%.

Explanation of Solution

Since the total power produced is 29.7 kW, the output power is as follows:

The conversion of kW into W is as follows:

29.7 kW=29.7×103 W.

Since the total number of heliostats is 50, each of which has an area of 2.7 m2, the total active area is as follows:

A=50×2.7 m2=135 m2

Hence, the active area is 135 m2.

The solar energy falls on the active area at the rate of 1000 W/m2. So, the input power is calculated as follows:

Input power=135 m2×1000 Wm2=135×103 W

Therefore, the input power is 135×103 W.

The percent efficiency of heliostats is calculated as follows:

% efficiency=Output powerInput power×100%

Substitute 135×103 W for input power and 29.7×103 W for output power in the above equation as:

% efficiency=29.7×103 W135×103 W×100%=0.22×100%=22%

Conclusion

The tower gives a percent efficiency of 22%.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Consider a cloudless day in which the sun shines down across the united states. if 2659 KJ of energy reaches a square meter (m^2) of the united states in one hour, how much total solar energy reaches the entire united states per hour? the entire area of the united states is 9,158.960 km^2.
In 2008 the approximate energy consumption for the entire population of earth for an entire year was 4.74x10^20 joules. The sun's energy striking the earth is orders of magnitude greater than this...taking the whole surface aea of the earth for an entire year, there is approximately 1.33x 10^16 joules/miles striking the earth's surface per year. if a solar panel was 100% efficient, approximately how big would the surface area (with units of a mile) of the solar panel have to be to meet the energy needs of the people living on earth?
The total power used by humans worldwide is approximately 15 TW (terawatts). Sunlight striking Earth provides 1.336 kW per square meter (assuming no clouds). The surface area of Earth is approximately 197,000,000 square miles. How much of Earth's surface would we need to cover with solar energy collectors to power the planet for use by all humans? Assume that the solar energy collectors can only convert 10 % of the available sunlight into useful power.
Knowledge Booster
Background pattern image
Chemistry
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
  • Text book image
    Chemistry In Focus
    Chemistry
    ISBN:9781337399692
    Author:Tro, Nivaldo J.
    Publisher:Cengage Learning,
    Text book image
    Chemistry & Chemical Reactivity
    Chemistry
    ISBN:9781337399074
    Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
    Publisher:Cengage Learning
    Text book image
    Chemistry & Chemical Reactivity
    Chemistry
    ISBN:9781133949640
    Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
    Publisher:Cengage Learning
  • Text book image
    Chemistry
    Chemistry
    ISBN:9781305957404
    Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
    Publisher:Cengage Learning
    Text book image
    Chemistry: An Atoms First Approach
    Chemistry
    ISBN:9781305079243
    Author:Steven S. Zumdahl, Susan A. Zumdahl
    Publisher:Cengage Learning
    Text book image
    Chemistry
    Chemistry
    ISBN:9781133611097
    Author:Steven S. Zumdahl
    Publisher:Cengage Learning
Text book image
Chemistry In Focus
Chemistry
ISBN:9781337399692
Author:Tro, Nivaldo J.
Publisher:Cengage Learning,
Text book image
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Text book image
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry: An Atoms First Approach
Chemistry
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Cengage Learning
The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY