Parts C and D please! Thank you Biomass can be used to create ethanol fuel. It can also be used to generate electricity, that can then be used to charge electric vehicles (EVs). In this problem, you will determine whether ethanol or electricity can provide a higher biomass‐to‐wheel efficiency. Assume that one hectare of cropland can produce 14 tons of dry switchgrass per year and that dry switchgrass has an energy density of 15 MJ/kg. a. Each ton of dry switchgrass can be processed to produce 73 gallons of ethanol. Ethanol has an energy density of 92 MJ/gallon. Assume that the internal combustion engine (ICE) is 23% efficient in converting fuel energy to useful work at the wheels (motion). With what efficiency is biomass energy delivered to the wheels in this ICE car? b. Alternatively, each ton of dry switchgrass could be used directly to generate electricity, and this electricity could in turn be used to operate an EV. Assume that a biomass‐fueled power plant has a first law efficiency of 28%. There is a 7.5% loss for transmission and distribution of electricity from the power plant to the car charging station. The motor plus battery is 88% efficient in converting electrical energy delivered from the charging station to mechanical work. With what efficiency is biomass energy delivered to the wheels in this EVICE car? c) According to the above analysis regarding these two uses of biomass for transportation, if we are concerned about utilizing biomass resources most energy efficiently, should we use biomass to generate electricity or should we use it to produce liquid fuels? While this analysis is useful and illustrative, many important factors are left out. Explain two shortcomings of this simplified analysis. Assume switchgrass is used to produce ethanol for use in 100% ethanol‐fueled vehicles. How much land (in km^2) would be required for switchgrass production to provide enough ethanol to meet the fuel demand of all cars the United States? Assume 264 million cars traveling an average of 13,000 mi/year with an average fuel economy of 24 miles/gallon ethanol.

Parts C and D please! Thank you Biomass can be used to create ethanol fuel. It can also be used to generate electricity, that can then be used to charge electric vehicles (EVs). In this problem, you will determine whether ethanol or electricity can provide a higher biomass‐to‐wheel efficiency. Assume that one hectare of cropland can produce 14 tons of dry switchgrass per year and that dry switchgrass has an energy density of 15 MJ/kg. a. Each ton of dry switchgrass can be processed to produce 73 gallons of ethanol. Ethanol has an energy density of 92 MJ/gallon. Assume that the internal combustion engine (ICE) is 23% efficient in converting fuel energy to useful work at the wheels (motion). With what efficiency is biomass energy delivered to the wheels in this ICE car? b. Alternatively, each ton of dry switchgrass could be used directly to generate electricity, and this electricity could in turn be used to operate an EV. Assume that a biomass‐fueled power plant has a first law efficiency of 28%. There is a 7.5% loss for transmission and distribution of electricity from the power plant to the car charging station. The motor plus battery is 88% efficient in converting electrical energy delivered from the charging station to mechanical work. With what efficiency is biomass energy delivered to the wheels in this EVICE car? c) According to the above analysis regarding these two uses of biomass for transportation, if we are concerned about utilizing biomass resources most energy efficiently, should we use biomass to generate electricity or should we use it to produce liquid fuels? While this analysis is useful and illustrative, many important factors are left out. Explain two shortcomings of this simplified analysis. Assume switchgrass is used to produce ethanol for use in 100% ethanol‐fueled vehicles. How much land (in km^2) would be required for switchgrass production to provide enough ethanol to meet the fuel demand of all cars the United States? Assume 264 million cars traveling an average of 13,000 mi/year with an average fuel economy of 24 miles/gallon ethanol.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter11: Energy And Its Conservation

Section: Chapter Questions

Problem 79A

See similar textbooks

Related questions

Concept explainers

Question

Parts C and D please! Thank you

Biomass can be used to create ethanol fuel. It can also be used to generate electricity, that can then be used to charge electric vehicles (EVs). In this problem, you will determine whether ethanol or electricity can provide a higher biomass‐to‐wheel efficiency. Assume that one hectare of cropland can produce 14 tons of dry switchgrass per year and that dry switchgrass has an energy density of 15 MJ/kg.

a. Each ton of dry switchgrass can be processed to produce 73 gallons of ethanol. Ethanol has an energy density of 92 MJ/gallon. Assume that the internal combustion engine (ICE) is 23% efficient in converting fuel energy to useful work at the wheels (motion). With what efficiency is biomass energy delivered to the wheels in this ICE car?

b. Alternatively, each ton of dry switchgrass could be used directly to generate electricity, and this electricity could in turn be used to operate an EV. Assume that a biomass‐fueled power plant has a first law efficiency of 28%. There is a 7.5% loss for transmission and distribution of electricity from the power plant to the car charging station. The motor plus battery is 88% efficient in converting electrical energy delivered from the charging

station to mechanical work. With what efficiency is biomass energy delivered to the wheels in this EVICE car?

c) According to the above analysis regarding these two uses of biomass for transportation, if we are concerned about utilizing biomass resources most energy efficiently, should we use biomass to generate electricity or should we use it to produce liquid fuels? While this analysis is useful and illustrative, many important factors are left out. Explain two

shortcomings of this simplified analysis.

Assume switchgrass is used to produce ethanol for use in 100% ethanol‐fueled vehicles. How much land (in km^2) would be required for switchgrass production to provide enough ethanol to meet the fuel demand of all cars the United States? Assume 264 million cars traveling an average of 13,000 mi/year with an average fuel economy of 24 miles/gallon ethanol.

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.