EGEE 101 – Energy and Environmental Engineering – course study material
Radiation - correct answer ✔✔how the "warmth" of the sun is transferred to you when you're out or
how you warm your hands in front of the fire.
- it can travel through space
Convection - correct answer ✔✔how the water becomes hot
-The water molecules are free to roam about as they are not fixed in relative positions (unless frozen)
like the metal atoms.
-So as a water molecule heats up it has more energy and travels further.
-The molecules moving around have lots of collisions but this molecular billiards occurs without energy
loss and so they will keep on colliding until there is a distribution of energy.
heat pump - correct answer ✔✔a device that moves heat
heat flows from... - correct answer ✔✔hot to cold
compressor - correct answer ✔✔pressurize the gas so the heat is concentrated and thus the heat
exchange will be more efficient
- cools the gas down so it will turn back into a liquid
Solar Energy Extractions - correct answer ✔✔- directly taking solar energy from the sun
1) Photovoltaic
2) 2 Thermal Systems
* Reflecting mirrors
* Parabolic mirrors
Thermal System - correct answer ✔✔- concentrating solar rays onto a boiler or focal point w/ oil
flowing through and heat oil up
- heat transfer process produces steam and steam produces electricity
, Photovoltaic - correct answer ✔✔- energy from sun is in small packages (photon)
- put photon w/ a positive and negative electron
- electron makes connection
Typically as coal gets older what happens... - correct answer ✔✔1) The rank of the coal increases
2) Decrease in the moisture content
3) Increase in the carbon content
List fossil fuels - correct answer ✔✔1) Oil
2) Coal
3) Natural Gas
4) Petroleum
Which of the following units would be best described as a measure of efficiency?
A) Feet
B) Joules
C) Miles per Gallon
D) Hours - correct answer ✔✔c) Miles per Gallon
Home geothermal systems typically generate? - correct answer ✔✔electricity
In 2000, what was the average cost per kW-hr for delivered residential electricity in Pennsylvania? -
correct answer ✔✔6.6 cents
- PA residents averaged 6.6 cents per kW-hr for electricity in 2000. This cost reflects a mix of nuclear,
coal, and some renewable electricity generation
When a refrigerant changes phase from a liquid to a gas, what does it do? - correct answer
✔✔Absorbs Heat
Radiation - correct answer ✔✔how the "warmth" of the sun is transferred to you when you're out or
how you warm your hands in front of the fire.
- it can travel through space
Convection - correct answer ✔✔how the water becomes hot
-The water molecules are free to roam about as they are not fixed in relative positions (unless frozen)
like the metal atoms.
-So as a water molecule heats up it has more energy and travels further.
-The molecules moving around have lots of collisions but this molecular billiards occurs without energy
loss and so they will keep on colliding until there is a distribution of energy.
heat pump - correct answer ✔✔a device that moves heat
heat flows from... - correct answer ✔✔hot to cold
compressor - correct answer ✔✔pressurize the gas so the heat is concentrated and thus the heat
exchange will be more efficient
- cools the gas down so it will turn back into a liquid
Solar Energy Extractions - correct answer ✔✔- directly taking solar energy from the sun
1) Photovoltaic
2) 2 Thermal Systems
* Reflecting mirrors
* Parabolic mirrors
Thermal System - correct answer ✔✔- concentrating solar rays onto a boiler or focal point w/ oil
flowing through and heat oil up
- heat transfer process produces steam and steam produces electricity
, Photovoltaic - correct answer ✔✔- energy from sun is in small packages (photon)
- put photon w/ a positive and negative electron
- electron makes connection
Typically as coal gets older what happens... - correct answer ✔✔1) The rank of the coal increases
2) Decrease in the moisture content
3) Increase in the carbon content
List fossil fuels - correct answer ✔✔1) Oil
2) Coal
3) Natural Gas
4) Petroleum
Which of the following units would be best described as a measure of efficiency?
A) Feet
B) Joules
C) Miles per Gallon
D) Hours - correct answer ✔✔c) Miles per Gallon
Home geothermal systems typically generate? - correct answer ✔✔electricity
In 2000, what was the average cost per kW-hr for delivered residential electricity in Pennsylvania? -
correct answer ✔✔6.6 cents
- PA residents averaged 6.6 cents per kW-hr for electricity in 2000. This cost reflects a mix of nuclear,
coal, and some renewable electricity generation
When a refrigerant changes phase from a liquid to a gas, what does it do? - correct answer
✔✔Absorbs Heat
