Hello I have two pictures with some questions Id like to get answers to! Short and great explanations please thank you ! 1. Energy system (Peter)a. Give an overview of the global energy situation. Touch upon (the level of) the overallenergy usage, the breakdown between major energy sources and the geographicalbreakdown.b. Explain the concept of price elasticity and discuss how it relates to the practical,technological availability of the chemical elements.What are the three thermodynamic quantities which are coupled together via the firstlaw of thermodynamics, and discuss why thermodynamics is so fundamental to theenergy problem.C.2. Solar (Peter)a. Explain and discuss the three main figures of merit for a solar cell (photovoltaic cell).b. When you make a solar cell using a semiconductor to absorb the sunlight, you must picka suitable band gap of the semiconductor. Explain what the band gap is and explain theconsiderations for a good pick of band gap. What happens if the band gap is chosen toohigh or too low?c. Explain why tandem solar cells have a theoretical efficiency advantage over single-junction cells.3. Wind (Xiaoli)a. Please explain the turbine power curve below, addressing how energy is beinggenerated as a function of wind speed.2000PRatedpower/kW18001600140012001000800600400200%1P~=PAV³Cpcut-inwind speed10rated powerTTIT111111IIiTIirated wind speedAwind speed / m s™¹Figure 8.28 Typical wind turbine wind speed-power curve20shut-downwind speed30b. Please explain the Weibull distribution, how to obtain Weibull distribution of windspeed and the relevant application based on the figure below. number of hours per year of each wind speed band120010008006004002000F(u) ==3 4 5Shaft power1Ps = P. Cp== PAV³. Cp5. Nuclear (Bent)> ^ ^ ^ ^ ^kw UAw Aw8 9 10 11 12 13 14wind speed/m s™¹Figure 8.29 A wind speed frequency distribution for a typical sitec. Please provide names of turbine components, and explain how energy is calculated basedon the figure below.Available powerP = ²mV² = ²/pAV³6. Biomass (Lasse)kw-1A = R²kw[-()*]expWeibull parametersShape: kwScale:15 16 17 18 194. Water (Ming)a. Name the different technologies utilizing energy stored in water. Explain the basicoperation principle of each technology.b. Explain how to calculate theoretical potential of energy output from hydro power stations.What are the influencing parameters?a. Describe the fission process and energetics.b. What are the basic components of a PWR?C. Describe the plutonium cycle (closed cycle) of a fast reactor.Aw [m/s]C. Provide an overview of the global development status on the technologies which utilizeenergy stored in water.

1. Energy system (Peter) a. Give an overview of the global energy situation. Touch upon (the level of) the overall energy usage, the breakdown between major energy sources and the geographical breakdown. b. Explain the concept of price elasticity and discuss how it relates to the practical, technological availability of the chemical elements. c. What are the three thermodynamic quantities which are coupled together via the first law of thermodynamics, and discuss why thermodynamics is so fundamental to the energy problem.

1. Energy system (Peter) a. Give an overview of the global energy situation. Touch upon (the level of) the overall energy usage, the breakdown between major energy sources and the geographical breakdown. b. Explain the concept of price elasticity and discuss how it relates to the practical, technological availability of the chemical elements. c. What are the three thermodynamic quantities which are coupled together via the first law of thermodynamics, and discuss why thermodynamics is so fundamental to the energy problem.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

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Hello I have two pictures with some questions Id like to get answers to! Short and great explanations please thank you !

1. Energy system (Peter)
a. Give an overview of the global energy situation. Touch upon (the level of) the overall
energy usage, the breakdown between major energy sources and the geographical
breakdown.
b. Explain the concept of price elasticity and discuss how it relates to the practical,
technological availability of the chemical elements.
What are the three thermodynamic quantities which are coupled together via the first
law of thermodynamics, and discuss why thermodynamics is so fundamental to the
energy problem.
C.
2. Solar (Peter)
a. Explain and discuss the three main figures of merit for a solar cell (photovoltaic cell).
b. When you make a solar cell using a semiconductor to absorb the sunlight, you must pick
a suitable band gap of the semiconductor. Explain what the band gap is and explain the
considerations for a good pick of band gap. What happens if the band gap is chosen too
high or too low?
c. Explain why tandem solar cells have a theoretical efficiency advantage over single-
junction cells.
3. Wind (Xiaoli)
a. Please explain the turbine power curve below, addressing how energy is being
generated as a function of wind speed.
2000
PRated
power/kW
1800
1600
1400
1200
1000
800
600
400
200
%
1
P~=PAV³Cp
cut-in
wind speed
10
rated power
T
T
I
T
1
1
1
1
1
1
I
I
i
T
I
i
rated wind speed
A
wind speed / m s™¹
Figure 8.28 Typical wind turbine wind speed-power curve
20
shut-down
wind speed
30
b. Please explain the Weibull distribution, how to obtain Weibull distribution of wind
speed and the relevant application based on the figure below.

number of hours per year of each wind speed band
1200
1000
800
600
400
200
0
F(u) =
=
3 4 5
Shaft power
1
Ps = P. Cp== PAV³. Cp
5. Nuclear (Bent)
> ^ ^ ^ ^ ^
kw U
Aw Aw
8 9 10 11 12 13 14
wind speed/m s™¹
Figure 8.29 A wind speed frequency distribution for a typical site
c. Please provide names of turbine components, and explain how energy is calculated based
on the figure below.
Available power
P = ²mV² = ²/pAV³
6. Biomass (Lasse)
kw-1
A = R²
kw
[-()*]
exp
Weibull parameters
Shape: kw
Scale:
15 16 17 18 19
4. Water (Ming)
a. Name the different technologies utilizing energy stored in water. Explain the basic
operation principle of each technology.
b. Explain how to calculate theoretical potential of energy output from hydro power stations.
What are the influencing parameters?
a. Describe the fission process and energetics.
b. What are the basic components of a PWR?
C. Describe the plutonium cycle (closed cycle) of a fast reactor.
Aw [m/s]
C. Provide an overview of the global development status on the technologies which utilize
energy stored in water.

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