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Out of 120 kJ of thermal energy at 377°C, kJ of it is...
A source of heat at 1000 K transfers 1000 kW of power to a power generation...
A source of heat at 1000 K transfers 1000 kW of power to a power generation device, while producing 300 kW of useful work. Determine: a. The rate of exergy destruction in this process, if the atmosphere is at 300K. The second law efficiency of the system. b.
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an...
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100 kPa and 300K to a final state of at 200 kPa and 600K. Determine the change in specific entropy of air during this compression process. 2. (3 Points) A heat engine operates between two temperature limits of 1300 K and 400 K. It receives 1.2 MJ of heat while producing 500 kJ of useful work. Determine: a. The exergy of...
A power cycle operates between a lake’s surface water at a temperature of 300 K and water at a depth whose temperature...
A power cycle operates between a lake’s surface water at a temperature of 300 K and water at a depth whose temperature is 285 K. At steady state the cycle develops a power output of 10 kW, while rejecting energy by heat transfer to the lower temperature water at the rate 14,400 kJ/min. Determine (a) the thermal efficiency of the power cycle and (b) the maximum thermal efficiency for any such power cycle. I have no idea on how to...
Design of a Solar Thermal Power Plant The scheme of the solar thermal power plant is...
Design of a Solar Thermal Power Plant The scheme of the solar thermal power plant is depicted in Figure 1. It features a Rankine-cycle based solar thermal power plant using tower technology. Technical data and assumptions: • = net electrical power output (turbine - pump) = 12 MW • Working fluid: water. • Condenser: outlet temperature = 320 K, outlet steam quality = 0%; no pressure drop through condenser. • Pump: adiabatic, outlet pressure = 170 bar; outlet temperature =...
pts per question) 1. A 2 m piston cylinder device contains nitroen gas at 200 kPa...
pts per question) 1. A 2 m piston cylinder device contains nitroen gas at 200 kPa and 350K. Now heat is transferred to the nitrogen in the tank and the pressure of nitrogen rises to 900 kPa and volume is maintained at same. The boundary work done during this process is (a) 1080 kJ (b) 840 k (c)240 k 2. A heat engine receives heat from a source at 727°C and rejiects the waste heat to a sink at 27°C,...
Chose the correct answer(s) from the multiple choice lists below 1. Exergy of a system is a) b) always increasing e) guided by the first and second laws of thermodynamics for reversible proce...
Chose the correct answer(s) from the multiple choice lists below 1. Exergy of a system is a) b) always increasing e) guided by the first and second laws of thermodynamics for reversible processes only Un d) limited by the second law of thermodynamics for all processes. processes, it is destroyed partly or completely). e) equal to the Gibs free energy of the system. 211two electrodes, one made of u (E.-3.06 V) and another made of Cu ΟΕ.+034V placed in an...
Please include the additional analysis at the bottom The gas turbine engine sketched below operates as...
Please include the additional analysis at the bottom
The gas turbine engine sketched below operates as a power cycle. Hot combustion gases, modeled as air, enter the turbine at 10 bar and 1500 K at a mass flow rate of 0.1 kg/s. The gases exit the turbine with a volumetric flow rate (AV 0.125 m'/s and a temperature of 900 K. The turbine loses 12 kW of heat to the surroundings. a. Starting from a mass balance determine the pressure...
.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...
Please help me with this Thermal problem. Thanks Problem 1. Consider a well-insulated tank with constant...
Please help me with this Thermal problem. Thanks
Problem 1. Consider a well-insulated tank with constant volume, V. The tank is initially at vacuum ("State 1", mi-0). Surrounding the tank is an ideal gas, with constant cv and k and gas constant R. The pressure Pin and temperature Tin of the ideal gas surrounding the tank are constant. A very tiny hole is punched into the tank and air fills the tank with a time-dependent mass flow rate, mi(), until...
A source of heat at 1000 K transfers 1000 kW of power to a power generation device, while producing 300 kW of useful work. Determine: a. The rate of exergy destruction in this process, if the atmosphere is at 300K. The second law efficiency of the system. b.
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100 kPa and 300K to a final state of at 200 kPa and 600K. Determine the change in specific entropy of air during this compression process. 2. (3 Points) A heat engine operates between two temperature limits of 1300 K and 400 K. It receives 1.2 MJ of heat while producing 500 kJ of useful work. Determine: a. The exergy of...
Design of a Solar Thermal Power Plant The scheme of the solar thermal power plant is depicted in Figure 1. It features a Rankine-cycle based solar thermal power plant using tower technology. Technical data and assumptions: • = net electrical power output (turbine - pump) = 12 MW • Working fluid: water. • Condenser: outlet temperature = 320 K, outlet steam quality = 0%; no pressure drop through condenser. • Pump: adiabatic, outlet pressure = 170 bar; outlet temperature =...
pts per question) 1. A 2 m piston cylinder device contains nitroen gas at 200 kPa and 350K. Now heat is transferred to the nitrogen in the tank and the pressure of nitrogen rises to 900 kPa and volume is maintained at same. The boundary work done during this process is (a) 1080 kJ (b) 840 k (c)240 k 2. A heat engine receives heat from a source at 727°C and rejiects the waste heat to a sink at 27°C,...
Chose the correct answer(s) from the multiple choice lists below 1. Exergy of a system is a) b) always increasing e) guided by the first and second laws of thermodynamics for reversible processes only Un d) limited by the second law of thermodynamics for all processes. processes, it is destroyed partly or completely). e) equal to the Gibs free energy of the system. 211two electrodes, one made of u (E.-3.06 V) and another made of Cu ΟΕ.+034V placed in an...
Please include the additional analysis at the bottom
The gas turbine engine sketched below operates as a power cycle. Hot combustion gases, modeled as air, enter the turbine at 10 bar and 1500 K at a mass flow rate of 0.1 kg/s. The gases exit the turbine with a volumetric flow rate (AV 0.125 m'/s and a temperature of 900 K. The turbine loses 12 kW of heat to the surroundings. a. Starting from a mass balance determine the pressure...
.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...
Please help me with this Thermal problem. Thanks
Problem 1. Consider a well-insulated tank with constant volume, V. The tank is initially at vacuum ("State 1", mi-0). Surrounding the tank is an ideal gas, with constant cv and k and gas constant R. The pressure Pin and temperature Tin of the ideal gas surrounding the tank are constant. A very tiny hole is punched into the tank and air fills the tank with a time-dependent mass flow rate, mi(), until...
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