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A source of heat at 1000 K transfers 1000 kW of power to a power generation...
please solve 11,12,13,14.thanks Out of 120 kJ of thermal energy at 377°C, kJ of it is...
please solve 11,12,13,14.thanks
Out of 120 kJ of thermal energy at 377°C, kJ of it is not available to create useful work, if the environment is at 27°C. 64.62 44.22 55.38 D Question 12 10 pts A heat engine operates between two temperature limits of 1300 K and 300 K (environment temperature). It receives 1.08 MJ of heat while producing 700 kJ of useful work. Determine the exergy destroyed in this process. 370 kJ 830 kJ 130 kJ How much...
QUESTION 1 A heat pump extracts heat from a cold temperature reservoir at 263 K at...
QUESTION 1 A heat pump extracts heat from a cold temperature reservoir at 263 K at high temperature reservoir, an auditorium, at 298 K. The heat pump requires (a) Draw a schematic diagram of the heat pump a rate of Q, and rejects 8 kW of heat to a an input power of 2.5 kw system and the reservoirs and show all energies and their values and directions on the diagram. ing an energy balance on the system, determine the...
A closed system receives heat at a rate of 2.6 kW from a source at 1020...
A closed system receives heat at a rate of 2.6 kW from a source at 1020 K , electrical power at a rate of 2.0 kW , and shaft power at a rate of 2.2 kW . 1-Determine the net rate of energy transfer. KW 2- Determine the net rate of exergy transfer into the system. KW 3- What is the maximum possible rate of exergy rise in the system? kW
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K...
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K and discharging 1000 kJ by heat transfer at a temperature of 450 K. There are ho other heat transfers. Appling the lausus Inequality, determine entropy generation, if the thermal efficiency is 50%. Also comment if the cycle is 15. Extra-credit (10 Pts.) reversible, irreversible, or impossible? Explain your reasoning. press entropy balance using heat engine efficiency in terms of O's. Remember this is not...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we can assume to be air enter a gas turbine at T-1050 K and P-950 kPa at a mass flow rate of 5 kg/s and leave the turbine at T 850 K and P-500 kPa. The heat lost to the surroundings at 25 °C is 12 kW. The flow through the turbine is steady state steady flow process. The air can be assumed to be...
A heat exchanger is being investigated as a waste heat recovery device. A heat exchanger is commo...
A heat exchanger is being investigated as a waste heat recovery device. A heat exchanger is common device for using a hot fluid to heat a cold fluid without the fluids mixing. The cold fluid stream of liquid A enters at 294.2 K and leaves the device at a temperature of 330.91 K. Liquid A flows at a rate of 0.006 Kg/s and has a specific heat of 4180 J/(Kg K) and a specific volume of 0.00102 m3/Kg. Liquid B...
Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine at 5 MPa and 500°C and is condensed in the condenser at a pressure of 50 kPa. Heat is supplied to th...
Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine at 5 MPa and 500°C and is condensed in the condenser at a pressure of 50 kPa. Heat is supplied to the steam in a furnace maintained at 800 K, and waste heat is rejected to the surroundings at 300 K. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the net work output, (b) the thermal efficiency...
[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...
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...
8. A ground source heat pump requires 7.7 kW of power to provide 9 tons of...
8. A ground source heat pump requires 7.7 kW of power to provide 9 tons of heat to a commercial hot water heating system. The coefficient of performance (COP) of this system is A. 4.1 B. 18 C. 2.9 D. 1.2 E. 3.7 Calculations: n yield much more useful energy from hydrogen fuel than combustion engines because A. they have fewer moving parts. B. they are not limited by Carnot's efficiency law. C. they operate at lower temperatures D. they...
please solve 11,12,13,14.thanks
Out of 120 kJ of thermal energy at 377°C, kJ of it is not available to create useful work, if the environment is at 27°C. 64.62 44.22 55.38 D Question 12 10 pts A heat engine operates between two temperature limits of 1300 K and 300 K (environment temperature). It receives 1.08 MJ of heat while producing 700 kJ of useful work. Determine the exergy destroyed in this process. 370 kJ 830 kJ 130 kJ How much...
QUESTION 1 A heat pump extracts heat from a cold temperature reservoir at 263 K at high temperature reservoir, an auditorium, at 298 K. The heat pump requires (a) Draw a schematic diagram of the heat pump a rate of Q, and rejects 8 kW of heat to a an input power of 2.5 kw system and the reservoirs and show all energies and their values and directions on the diagram. ing an energy balance on the system, determine the...
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K and discharging 1000 kJ by heat transfer at a temperature of 450 K. There are ho other heat transfers. Appling the lausus Inequality, determine entropy generation, if the thermal efficiency is 50%. Also comment if the cycle is 15. Extra-credit (10 Pts.) reversible, irreversible, or impossible? Explain your reasoning. press entropy balance using heat engine efficiency in terms of O's. Remember this is not...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we can assume to be air enter a gas turbine at T-1050 K and P-950 kPa at a mass flow rate of 5 kg/s and leave the turbine at T 850 K and P-500 kPa. The heat lost to the surroundings at 25 °C is 12 kW. The flow through the turbine is steady state steady flow process. The air can be assumed to be...
Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine at 5 MPa and 500°C and is condensed in the condenser at a pressure of 50 kPa. Heat is supplied to the steam in a furnace maintained at 800 K, and waste heat is rejected to the surroundings at 300 K. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the net work output, (b) the thermal efficiency...
[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...
8. A ground source heat pump requires 7.7 kW of power to provide 9 tons of heat to a commercial hot water heating system. The coefficient of performance (COP) of this system is A. 4.1 B. 18 C. 2.9 D. 1.2 E. 3.7 Calculations: n yield much more useful energy from hydrogen fuel than combustion engines because A. they have fewer moving parts. B. they are not limited by Carnot's efficiency law. C. they operate at lower temperatures D. they...
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