The ratio of the desired output to the required input is commonly referred to as …...
The ratio of the desired output to the required input is commonly referred to as …
The entropy generation
The second law efficiency
The first law efficiency
The energy destruction
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The ratio of
the desired
output to the
required input
is commonly referred
to as …...
Consider a device where the ideal input is 12, the actual input is 77 and the...
Consider a device where the ideal input is 12, the actual input is 77 and the ideal output is 15. According to the second law efficiency equation, what would the actual output be?
8. A separation unit has two input and two output streams; the system is operating at...
8. A separation unit has two input and two output streams; the system is operating at steady state. The first input stream has a flow of 185 kg/min with 35.0% w/w methanol; the second input stream has a flow of 100 kg/min with 44.0% w/w methanol. One of the desired output streams will have a flow of 85 kg/min with 75.0% w/w methanol. What is the flow rate and percent of methanol in the second output stream?
The measure of the efficiency of a specific input in the production of a given output...
The measure of the efficiency of a specific input in the production of a given output is called ________. efficiency ratio total factor productivity labor productivity partial productivity
NO INTERPOLATION REQUIRED Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C (state...
NO INTERPOLATION REQUIRED Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C (state 1) with a mass flow rate of 5 kg/s and leaves at 100 kPa the isentropic efficiency of the turbine is 85%. Neglecting the kinetic energy change of the steam, and considering variable specific heats, determine: a. the isentropic power of the turbine Isentropic power in kW b. the temperature at the turbine exit temperature at exit in degrees C c. the actual power...
thermodynamics ne operating between the heat source and heat sink temperatures of 16000K and 4000K. It...
thermodynamics
ne operating between the heat source and heat sink temperatures of 16000K and 4000K. It draws 100 A heat engi MW of energy from the heat source and rejects 60 MW of energy to the heat sink. (a) What is the work output of this heat engine if the thermal efficiency is 40% (b) What is the second law efficiency of this heat engine (c) Is this heat engine compliant with the Second Law of Thermodynamics and the increase...
4. An Otto cycle with air as the working fluid has a compression ratio of 9.2....
4. An Otto cycle with air as the working fluid has a compression ratio of 9.2. Under cold air standard conditions, the thermal efficiency of this cycle is; (1 Point) 26.6% 45.2% 58.8% 64.3% 72.7% 5. Which one represents the main advantage of cogeneration plant when compared to conventional power plant: 5 (1 Point) Fuel consumption of cogeneration plant is lower O The amount of heat rejected in condenser of cogeneration plant is lower Pump work input in cogeneration plant...
[20 marks) 3 a) is the exergy of a system different in different environments? (2 marks)...
[20 marks) 3 a) is the exergy of a system different in different environments? (2 marks) b) What is the second law efficiency? (2 marks) c) Consider a process during which no entropy is generated. Does the exergy destruction for this process have to be zero? (1 mark) d) A piston cylinder device initially contains 2 L of air at 100 kPa and 25 °C. Air is now compressed to a final state of 600 kPa and 150 °C. The...
. The Helms Pumped Storage Plant near Fresno, CA helps to meet peak energy demand by ...
. The Helms Pumped Storage Plant near Fresno, CA helps to meet peak energy demand by pumping water at 25 °C from a lower to an upper reservoir during times of low electrical demand or high wind energy production, and releasing it for hydroelectric power generation during times of peak electrical demand. The vertical distance between the reservoir surfaces is 531 m. Reversible Francis pump/hydroturbine units – open continuous-flow systems – are used for both pumping and power generation. They...
3. a) is the exergy of a system different in different environments? (2 marks) b) What...
3. a) is the exergy of a system different in different environments? (2 marks) b) What is the second law efficiency? (2 marks) c) Consider a process during which no entropy is generated. Does the exergy destruction for thi process have to be zero? (1 mark) d) A piston cylinder device initially contains 2 L of air at 100 kPa and 25 °C. Air is now compresse to a final state of 600 kPa and 150 °C. The useful work...
An assembly line is to operate eight hours per day with a desired output of 160...
An assembly line is to operate eight hours per day with a desired output of 160 units per day. The following table contains information on this product's task times and precedence relationships: IMMEDIATE PREDECESSOR TASK TIME (SECONDS) 100 TASK A 70 D 50 40 C C. D 70 140 G H b. What is the required workstation cycle time meet the desired output rate? (Round your answer to the nearest whole number.) Workstation cycle time seconds per unit c. Balance...
8. A separation unit has two input and two output streams; the system is operating at steady state. The first input stream has a flow of 185 kg/min with 35.0% w/w methanol; the second input stream has a flow of 100 kg/min with 44.0% w/w methanol. One of the desired output streams will have a flow of 85 kg/min with 75.0% w/w methanol. What is the flow rate and percent of methanol in the second output stream?
thermodynamics
ne operating between the heat source and heat sink temperatures of 16000K and 4000K. It draws 100 A heat engi MW of energy from the heat source and rejects 60 MW of energy to the heat sink. (a) What is the work output of this heat engine if the thermal efficiency is 40% (b) What is the second law efficiency of this heat engine (c) Is this heat engine compliant with the Second Law of Thermodynamics and the increase...
4. An Otto cycle with air as the working fluid has a compression ratio of 9.2. Under cold air standard conditions, the thermal efficiency of this cycle is; (1 Point) 26.6% 45.2% 58.8% 64.3% 72.7% 5. Which one represents the main advantage of cogeneration plant when compared to conventional power plant: 5 (1 Point) Fuel consumption of cogeneration plant is lower O The amount of heat rejected in condenser of cogeneration plant is lower Pump work input in cogeneration plant...
[20 marks) 3 a) is the exergy of a system different in different environments? (2 marks) b) What is the second law efficiency? (2 marks) c) Consider a process during which no entropy is generated. Does the exergy destruction for this process have to be zero? (1 mark) d) A piston cylinder device initially contains 2 L of air at 100 kPa and 25 °C. Air is now compressed to a final state of 600 kPa and 150 °C. The...
3. a) is the exergy of a system different in different environments? (2 marks) b) What is the second law efficiency? (2 marks) c) Consider a process during which no entropy is generated. Does the exergy destruction for thi process have to be zero? (1 mark) d) A piston cylinder device initially contains 2 L of air at 100 kPa and 25 °C. Air is now compresse to a final state of 600 kPa and 150 °C. The useful work...
An assembly line is to operate eight hours per day with a desired output of 160 units per day. The following table contains information on this product's task times and precedence relationships: IMMEDIATE PREDECESSOR TASK TIME (SECONDS) 100 TASK A 70 D 50 40 C C. D 70 140 G H b. What is the required workstation cycle time meet the desired output rate? (Round your answer to the nearest whole number.) Workstation cycle time seconds per unit c. Balance...
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