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= Efficiency of real heat engines We showed that the efficiency of an ideal heat engine...
Prove that if you had a heat engine whose efficiency was better than the ideal value...
Prove that if you had a heat engine whose efficiency was better than the ideal value (e </= 1 - Tc/Th), you could hook it up to an ordinary Carnot refrigerator to make a refrigerator that requires no work input.
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let us also assume that we find a geothermal well under the Pacific not too far off shore. We are going to extract hot water from the well (at 940 C) and expel the waste heat at the ocean's surface (at an average constant temperature of 14° C.) a) What is the maximum possible efficiency of a heat engine operating between these two temperatures? b)...
A heat engine uses a heat source at 540 ∘C and has an ideal (Carnot) efficiency...
A heat engine uses a heat source at 540 ∘C and has an ideal (Carnot) efficiency of 25 % .To increase the ideal efficiency to 43 % , what must be the temperature of the heat source?
Problem 15.30 A heat engine uses a heat source at 550 °C and has an ideal...
Problem 15.30 A heat engine uses a heat source at 550 °C and has an ideal (Camot) efficiency of 29% Part A To increase the ideal efficiency to 46 %.what must be the temperature of the heat source? Express your answer using two significant figures. VAX RO? TH- Submit Request Answer
Learning Goal: To understand what a heat engine is and its theoretical limitations. Ever since Hero...
Learning Goal:
To understand what a heat engine is and its theoretical
limitations.
Ever since Hero demonstrated a crude steam turbine in ancient
Greece, humans have dreamed of converting heat into work. If a fire
can boil a pot and make the lid jump up and down, why can't heat be
made to do useful work?
A heat engine is a device designed to convert heat into work.
The heat engines we will study will be cyclic: The working
substance...
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...
A friend passionate about cars mentions that Toyota has developed an engine with a thermal efficiency...
A friend passionate about cars mentions that Toyota has developed an engine with a thermal efficiency of 40% which is an extraordinary accomplishment! 1) Supposing this engine is ideal and based on the Carnot cycle, and also assuming that the cold reservoir temperature is 300 K, what is the hot reservoir temperature to meet the stated efficiency? You mention your result to this friend who points out correctly that the temperature of the hot reservoir would essentially be the temperature...
We have seen that the Carnot cycle can be used to determine the maximum efficiency of...
We have seen that the Carnot cycle can be used to determine the maximum efficiency of a heat engine. The efficiency is defined as the sum of all of the work during the cycle divided by the amount of heat exchanged during the expansion process: efficiency=?1 +?2 +?3 +?3 /?1 Theoretically, the efficiency of the engine can be determined with the hot and cold temperature of the cycle. efficiency = ?h − ?c/ ?h In this problem, we will calculate...
please answer all parts (a,b, and c) In class we showed that for a Carnot cycle...
please answer all parts (a,b, and c)
In class we showed that for a Carnot cycle for an ideal gas (Lecture 8, page 10), the following identity follows: Sigmai qi/Ti = q1/T1 + q2/T2 = 0, Where qi, is the (reversible) heat associated with each isothermal step. As we shall see next week, we will be able to identify each of these terms as entropy contributions, DeltaSi = qi/Ti, such that they add up to zero in a cycle, giving...
Second Law of Thermodynamics Learning Goal: To understand the implications of the second law of thermodynamics...
Second Law of Thermodynamics Learning Goal: To understand the implications of the second law of thermodynamics. The second law of thermodynamics explains the direction in which the thermodynamic processes tend to go. That is, it limits the types of final states of the system that naturally evolve from a given initial state. The second law has many practical applications. For example it explains the limits of efficiency for heat engines and refrigerators. To develop a better understanding of this law,...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let us also assume that we find a geothermal well under the Pacific not too far off shore. We are going to extract hot water from the well (at 940 C) and expel the waste heat at the ocean's surface (at an average constant temperature of 14° C.) a) What is the maximum possible efficiency of a heat engine operating between these two temperatures? b)...
Problem 15.30 A heat engine uses a heat source at 550 °C and has an ideal (Camot) efficiency of 29% Part A To increase the ideal efficiency to 46 %.what must be the temperature of the heat source? Express your answer using two significant figures. VAX RO? TH- Submit Request Answer
Learning Goal:
To understand what a heat engine is and its theoretical
limitations.
Ever since Hero demonstrated a crude steam turbine in ancient
Greece, humans have dreamed of converting heat into work. If a fire
can boil a pot and make the lid jump up and down, why can't heat be
made to do useful work?
A heat engine is a device designed to convert heat into work.
The heat engines we will study will be cyclic: The working
substance...
please answer all parts (a,b, and c)
In class we showed that for a Carnot cycle for an ideal gas (Lecture 8, page 10), the following identity follows: Sigmai qi/Ti = q1/T1 + q2/T2 = 0, Where qi, is the (reversible) heat associated with each isothermal step. As we shall see next week, we will be able to identify each of these terms as entropy contributions, DeltaSi = qi/Ti, such that they add up to zero in a cycle, giving...
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