Homework Answers
By the second law of thermodynamics, a heat engine operating between two temperatures has a maximum efficiency of,
Max efficiency = 1-[(TC)/(TH)]
Any engine with a maximum efficiency greater than this will violate the second law of thermodynamics
Answer: B and D
The remaining designs violate(s) the second law of thermodynamics are: BD
Add Answer to:
Six New Heat Engines Conceptual Question As part of your job at the patent office, you...
Please also help me with part B and C, I will put them in the comments...
Please also help me with part B and C, I will put them in the
comments after each correct answer. Thank You
As part of your job at the patent office, you are asked to evaluate the six designs shown in the figure for innovative new heat engines. (Figure 1) PartA Which of the designs violate(s) the first law of thermodynamics? Give the letter(s) of the design(s) in alphabetical order, without commas or spaces (e.g., ACD) View Available Hint(s) BDE...
As part of your job at the patent office, you are asked to evaluate the six designs shown in the figure for innovative...
As part of your job at the patent office, you are asked to
evaluate the six designs shown in the figure for innovative new
heat engines. (Figure 1)
Part A
Which of the designs violate(s) the first law of
thermodynamics?
Give the letter(s) of the design(s) in alphabetical order,
without commas or spaces (e.g., ACD).
Written Question #1 For the heat engines and the heat pumps below fill in possible values...
Written Question #1 For the heat engines and the heat pumps below fill in possible values for the heat and work values such that the conditions given are met. You Must Explain your answers for full points. (b.) A heat engine that obeys the first law of thermodynamics but violates the second law of thermodynamics without Qc being zero. (a.) A heat engine that viloates the first law of thermodynamics. 500 K Нот 500 K Нот QH W. Wout out...
earning Goal: To understand that a heat engine run backward is a heat pump that can be used as a refrigerator....
earning Goal: To understand that a heat engine run backward is a heat pump that can be used as a refrigerator. By now you should be familiar with heat engines--devices, theoretical or actual, designed to convert heat into work. You should understand the following: Heat engines must be cyclical; that is, they must return to their original state some time after having absorbed some heat and done some work). Heat engines cannot convert heat into work without generating some waste...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of which operates between constant-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. For each engine, state and explain why it does or doesn't violate the 1st and 2nd Laws of Thermo. 1st law hint: Think quantity of work. 2nd Law hint: Think process efficiency. Engine 1 2 3 4 QH (J) 200 500 600...
6) In a reversible Carnot heat engine which operates between reservoirs at Thigh 500 K and...
6) In a reversible Carnot heat engine which operates between reservoirs at Thigh 500 K and Tlow = 300 K with a net power output of 600 W, methane gas is used as working fluid. Methane can be considered here as an ideal gas with M 16.043 g mol-, and average heat capacities c 4 R and cp- 5 R. The cycle operates in a steady state with a substance flow rate of 0.375 mol s . Before the isothermal...
You are tasked with designing a new 4-stroke engine for an autonomous vehicle platform. The desir...
You are tasked with designing a new 4-stroke engine for an autonomous vehicle platform. The desired specifications are shown in the table below. The engine power and torque requirements will be significantly lower than a conventional engine since the vehicle does not have to be fun to drive". Each cylinder will have a displacement of 0.5 L, and a compression raso of 12 to 1 5 KWT 5000rpm onjue BMEP @ Peak T Vapsr sylind 12 bar a) Given the...
Please answer part D only. [576 Points) DETAILS PREVIOUS ANSWERS SERPSE 10 21.4.P.013. IY NOTES ASK...
Please answer part D only.
[576 Points) DETAILS PREVIOUS ANSWERS SERPSE 10 21.4.P.013. IY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You are working on a summer job at a company that designs non-traditional energy systems. The company is working on a proposed electric power plant that would make use of the temperature gradient in the ocean. The system includes a heat engine that would operate between 20.0°C (surface water temperature) and 5.00°C (water temperature at a depth of about 1...
1. Exhaust gas at 400 C and 1 bar from i engines flows at the rate...
1. Exhaust gas at 400 C and 1 bar from i engines flows at the rate of 125 mol s into a waste-heat boiler where saturated steam in generated at a pressure of 1200 kPa. Water enters the boiler at 20 C (Ta) and the exhaust gases are cooled to within 10°C of the steam temperature. The heat capacity of the exhaust gases is C/R-3.341.12x10 T/K. The steam flows into an adiabatic turbine and exhausts at a pressure of 25...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
Please also help me with part B and C, I will put them in the
comments after each correct answer. Thank You
As part of your job at the patent office, you are asked to evaluate the six designs shown in the figure for innovative new heat engines. (Figure 1) PartA Which of the designs violate(s) the first law of thermodynamics? Give the letter(s) of the design(s) in alphabetical order, without commas or spaces (e.g., ACD) View Available Hint(s) BDE...
As part of your job at the patent office, you are asked to
evaluate the six designs shown in the figure for innovative new
heat engines. (Figure 1)
Part A
Which of the designs violate(s) the first law of
thermodynamics?
Give the letter(s) of the design(s) in alphabetical order,
without commas or spaces (e.g., ACD).
Written Question #1 For the heat engines and the heat pumps below fill in possible values for the heat and work values such that the conditions given are met. You Must Explain your answers for full points. (b.) A heat engine that obeys the first law of thermodynamics but violates the second law of thermodynamics without Qc being zero. (a.) A heat engine that viloates the first law of thermodynamics. 500 K Нот 500 K Нот QH W. Wout out...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of which operates between constant-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. For each engine, state and explain why it does or doesn't violate the 1st and 2nd Laws of Thermo. 1st law hint: Think quantity of work. 2nd Law hint: Think process efficiency. Engine 1 2 3 4 QH (J) 200 500 600...
6) In a reversible Carnot heat engine which operates between reservoirs at Thigh 500 K and Tlow = 300 K with a net power output of 600 W, methane gas is used as working fluid. Methane can be considered here as an ideal gas with M 16.043 g mol-, and average heat capacities c 4 R and cp- 5 R. The cycle operates in a steady state with a substance flow rate of 0.375 mol s . Before the isothermal...
You are tasked with designing a new 4-stroke engine for an autonomous vehicle platform. The desired specifications are shown in the table below. The engine power and torque requirements will be significantly lower than a conventional engine since the vehicle does not have to be fun to drive". Each cylinder will have a displacement of 0.5 L, and a compression raso of 12 to 1 5 KWT 5000rpm onjue BMEP @ Peak T Vapsr sylind 12 bar a) Given the...
Please answer part D only.
[576 Points) DETAILS PREVIOUS ANSWERS SERPSE 10 21.4.P.013. IY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You are working on a summer job at a company that designs non-traditional energy systems. The company is working on a proposed electric power plant that would make use of the temperature gradient in the ocean. The system includes a heat engine that would operate between 20.0°C (surface water temperature) and 5.00°C (water temperature at a depth of about 1...
1. Exhaust gas at 400 C and 1 bar from i engines flows at the rate of 125 mol s into a waste-heat boiler where saturated steam in generated at a pressure of 1200 kPa. Water enters the boiler at 20 C (Ta) and the exhaust gases are cooled to within 10°C of the steam temperature. The heat capacity of the exhaust gases is C/R-3.341.12x10 T/K. The steam flows into an adiabatic turbine and exhausts at a pressure of 25...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
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