Energy Transfer Model
Identify the input in the energy transfer diagram
Sunlight
What you get/gain from a decision
Benefit
What is the calculation for efficiency?
(Output/input)x100=efficiency
What are 2 factors that a community would want to consider before switching to ONLY solar as their power source?
The average amount of sun, the lifespan, the cost, the reliability, the efficiency, etc.
Each person in my community needs 170 (MJ/person) of energy each day. Use this information to determine whether 8500 (m^2) of solar panels would be sufficient to provide electricity to a community of 1,500 people if (11.6 MJ/m^2) of energy is being transferred.
No, only 65.7 MJ/person is being transferred.
Identify the output(s) in the energy transfer diagram
Glucose and Oxygen (O2)
What you give up/lose to get something
Cost
If my system has an input of 300 units of energy and the output is 250 units - how efficient is my system?
83%
What is a trade-off to using solar as a power source?
Low reliability, the cost, the amount of materials needed to build, the excessive energy collected, etc
Each person in my community needs 200 (MJ/person) of energy each day. Use this information to determine whether 6000 (m^2) of solar panels would be sufficient to provide electricity to a community of 4000 people if (28.8 MJ/m^2) of energy is being transferred.
No, only 43.2 MJ/person is being produced.
If we start with 100 units of energy and 10 are lost between each component how many units of energy are in the output?
70 units
Doing a task well without wasting time, energy, or money. The most output for the least input.
Efficiency
With an efficiency of 95% and and output of 80 MW what is my input?
84.2 MW
What is a benefit and a trade-off of using nonrenewable resources as your power source?
Benefit: higher reliability
Cost: Less environmentally friendly
(Other answers will be accepted)
Each person in my community needs 100 (MJ/person) of energy each day. Use this information to determine whether 10,000 (m^2) of solar panels would be sufficient to provide electricity to a community of 300 people if (50.5 MJ/m^2) of energy is being transferred.
Yes, there are 1683.3 MJ/person available.
How efficient is our energy transfer model?
70% (70/100)
A way to save something for later.
Storage Solution
With an efficiency of 90% and an input of 125 MW what is the output?
112.5
What is a trade-off of using nuclear energy? List one benefit and one cost.
High reliability but a high initial cost
(other answers will be accepted)
Each person in my community needs 200 (MJ/person) of energy each day. Use this information to determine whether 10,000 (m^2) of solar panels would be sufficient to provide electricity to a community of 100 people if (75 MJ/m^2) of energy is being transferred.
Yes, 7500 MJ/person would be available.
What signifies the difference between the components of the system and the input/output?
The boundary line
How much you can trust something to work correctly all the time.
Reliability
With an efficiency of 20% and an input of 10.5 MW what is the output?
2.10 MW
What are 2 factors a community may consider before switching to hydro as their main power source?
How it may affect the surrounding land, the cost, the efficiency, the reliability, the cost, the wildlife it would affect, etc.
What is Ms. Petges' favorite sports team?
The Cubs!