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2. Determine if the following heat engines can be constructed based on the first and second...
please help with 5.34 , 5.35 , 5.36 and 5.45 4. Problem 5.34 5.34 For each...
please help with 5.34 , 5.35 , 5.36 and 5.45
4. Problem 5.34 5.34 For each of the cases below, determine if the heat engine satisfies the first law (energy equation) and if it violates the second law. a. Qu = 6kW, 0. = 4kW, W = 2 kW b. Qu = 6kW, = 0kW, W = 6kW c. Qu=6kW, 2. = 2 kW, W = 5kW d. Qu=6kW, L = 6kW, W = 0kW 5.35 For each of the...
2. Two reversible Carnot heat engines operate in series between a source at 427°C and a...
2. Two reversible Carnot heat engines operate in series between a source at 427°C and a sink at 17°C. If the engines have equal efficiencies and the first rejects 400kJ to the second, calculate: (1)the temperature at which heat is supplied to the second engine; (2) the heat taken from the source; (3)the work done by each engine.
Two heat engines each go through a process at the same temperature. The change in entropy...
Two heat engines each go through a process at the same temperature. The change in entropy of the first engine’s process is 88 times the change in entropy of the second engine’s process. How does the heat absorbed by the first engine compare to the heat absorbed by the second engine? A.) The heat absorbed by the first engine is 1818 the heat absorbed by the second engine. B.) The heat absorbed by the first engine is 1414 the heat...
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...
Determine the heat transfer surlace area required for a heat exchanger constructed from a 0.0254 m...
Determine the heat transfer surlace area required for a heat exchanger constructed from a 0.0254 m OD tube to cool 6.93 kg/s of a 95% ethyl alcohol solution (Cp-3810 J/kg K) Irom 65.6 °C to 39.4 °C, using 6.30 kg/s of water (CP-4187 J/kg K) available at 10 "C Assuming that the overall coeflicient of heat transfer based on the outer tube area is 568 W/m K and Coc consider each of the following arrange a) Parallel-llow shel and tube...
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,...
The heat exchanger in a heat lung machine is constructed so that blood flows through an...
The heat exchanger in a heat lung machine is constructed so
that blood flows through an array of tubes controlled temperature
water circulated through an outer exterior shell.
e heat exchanger in a heat lung machine is constructed so that blood flows through an array of tubes with controlled temperature water circulated through an outer exterior shell. Although the temperature of the blood varies as it passed through the heat exchanger, during the cool down cycle when a patient is...
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...
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...
heat transfer question Consider a long duct constructed with diffuse and gray walls. The width of...
heat transfer question
Consider a long duct constructed with diffuse and gray walls. The width of each wall is 1 m. Heat transfer is from surface 1 to surface 2, while surface 3 is completely insulated and cannot absorb heat (which means 93 = 0). A2, T2 = 700 K, £= 0.5 Aj, T1 = 1000 K, £1 = 0.33 -A2, T3, E3 = 0.8 a. Provide a sketch and state your assumptions b. Determine the net radiation transfer from...
please help with 5.34 , 5.35 , 5.36 and 5.45
4. Problem 5.34 5.34 For each of the cases below, determine if the heat engine satisfies the first law (energy equation) and if it violates the second law. a. Qu = 6kW, 0. = 4kW, W = 2 kW b. Qu = 6kW, = 0kW, W = 6kW c. Qu=6kW, 2. = 2 kW, W = 5kW d. Qu=6kW, L = 6kW, W = 0kW 5.35 For each of the...
2. Two reversible Carnot heat engines operate in series between a source at 427°C and a sink at 17°C. If the engines have equal efficiencies and the first rejects 400kJ to the second, calculate: (1)the temperature at which heat is supplied to the second engine; (2) the heat taken from the source; (3)the work done by each engine.
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...
Determine the heat transfer surlace area required for a heat exchanger constructed from a 0.0254 m OD tube to cool 6.93 kg/s of a 95% ethyl alcohol solution (Cp-3810 J/kg K) Irom 65.6 °C to 39.4 °C, using 6.30 kg/s of water (CP-4187 J/kg K) available at 10 "C Assuming that the overall coeflicient of heat transfer based on the outer tube area is 568 W/m K and Coc consider each of the following arrange a) Parallel-llow shel and tube...
The heat exchanger in a heat lung machine is constructed so
that blood flows through an array of tubes controlled temperature
water circulated through an outer exterior shell.
e heat exchanger in a heat lung machine is constructed so that blood flows through an array of tubes with controlled temperature water circulated through an outer exterior shell. Although the temperature of the blood varies as it passed through the heat exchanger, during the cool down cycle when a patient is...
heat transfer question
Consider a long duct constructed with diffuse and gray walls. The width of each wall is 1 m. Heat transfer is from surface 1 to surface 2, while surface 3 is completely insulated and cannot absorb heat (which means 93 = 0). A2, T2 = 700 K, £= 0.5 Aj, T1 = 1000 K, £1 = 0.33 -A2, T3, E3 = 0.8 a. Provide a sketch and state your assumptions b. Determine the net radiation transfer from...
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