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Power is supplied to the system for a certain amount of time, At. Find the missing...
1. (10 points) A combined gas turbine-vapor power plant has a net power output of 45...
1. (10 points) A combined gas turbine-vapor power plant has a net power output of 45 MW. Air enters the compressor of the gas turbine at 100 kPa, 300 K, and is compressed to 1200 kPa. The isentropic efficiency of the compressor is 84%. The condition at the inlet to the turbine is 1200 kPa, 1400 K. Air expands through the turbine, which has an isentropic efficiency of 88%, to a pressure of 100 kPa. The air then passes through...
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...
citor i Voltage and current as a function -10 of time. b. Find and plot the...
citor i Voltage and current as a function -10 of time. b. Find and plot the instantaneous power pl) on the capacitor. c. Find and plot the instantaneous energy wit stored on the capacitor. ce of V. d plot The voltage across a capacitor with capacitance of 50 aF is given by 6.8 nce of i) V. and f time. -20, 0sI<S 40-300, 5SI<10 6.10 (1) -10r+200, 10 sI<20 0, otherwise ance 000) This waveform is shown in Figure P6.8....
a b c d b. What is the output noise power, PSy Uaj.p A certain communication...
a b c d
b. What is the output noise power, PSy Uaj.p A certain communication channel is characterized by K noise with power-spectral density of S) 10-10 w The message signal that is to be 3. 10-9 attenuation and additive white transmitted through this channel is m (t) # 50 Cos (10000?), and the carrier signal that will be used in each ofthe following modulation schemes is c(t) = 100 Cos (40000m). n(t) 20 m(t) x() Channel wit (0...
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 =...
Air in a piston-cylinder assembly executes a Carnot power cycle (4 internally reversible processes, shown in...
Air in a piston-cylinder assembly executes a Carnot power cycle (4 internally reversible processes, shown in the figure below). The isothermal expansion and compression processes occur at TH 1400 K and Tc-350 K, respectively. The pressure at the beginning and end of the isothermal compression are p4-100 kPa and pi - 500 kPa, respectively Assume the ideal gas model for the air: ai 0.717 J/g.K Mair- 28.97 g/mol kpv.air 1.4 R 8.314J /(mol K) Adiabatic Isothermal expansion Adiabatic compression Gas...
multi part question 4. Agricultural export subsidies in a small nation The following graph shows the...
multi part question
4. Agricultural export subsidies in a small nation The following graph shows the market for wheat in Canada, where Dc is the demand curve, Sc is the supply curve, and Pw is the free trade price of wheat. Assume that Canada is a relatively small producer of wheat, so changes in its output do not affect the world price of wheat. Also assume that Canada is currently open to free trade, and domestic consumers are able to...
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...
(100 points) Figure below shows the schematic diagram of a two-stage cascade refrigeration system (also called...
(100 points) Figure below shows the schematic diagram of a two-stage cascade refrigeration system (also called the Economizer 2-Stage Refrigeration Cycle). Comparing to the cascade two-stage refrigeration system discussed in In-class Activity #10a, in this case, the flash chamber (now called Flash Intercooler) is still used but the mixing chamber is removed. The superheated vapor (2) out of the low-pressure compressor (1) is routed into the flash chamber, and the saturated vapor (3) out of the flash chamber enters directly...
Question 4 [12 marks] Some applications of mathematics require the use of very large matrices (several...
Question 4 [12 marks] Some applications of mathematics require the use of very large matrices (several thousand rows for example) and this in turn directs attention to efficient ways to manipulate them. This question focuses on the efficiency of matrix multiplication, counting the number of numerical arithmetic operations (addition, subtraction and multiplication) involved. We start with very simplest case of 2x2 matrices. (a) The standard way of multiplying 2x2 matrices uses 8 multiplications and 4 additions. List the 8 products...
1. (10 points) A combined gas turbine-vapor power plant has a net power output of 45 MW. Air enters the compressor of the gas turbine at 100 kPa, 300 K, and is compressed to 1200 kPa. The isentropic efficiency of the compressor is 84%. The condition at the inlet to the turbine is 1200 kPa, 1400 K. Air expands through the turbine, which has an isentropic efficiency of 88%, to a pressure of 100 kPa. The air then passes through...
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...
citor i Voltage and current as a function -10 of time. b. Find and plot the instantaneous power pl) on the capacitor. c. Find and plot the instantaneous energy wit stored on the capacitor. ce of V. d plot The voltage across a capacitor with capacitance of 50 aF is given by 6.8 nce of i) V. and f time. -20, 0sI<S 40-300, 5SI<10 6.10 (1) -10r+200, 10 sI<20 0, otherwise ance 000) This waveform is shown in Figure P6.8....
a b c d
b. What is the output noise power, PSy Uaj.p A certain communication channel is characterized by K noise with power-spectral density of S) 10-10 w The message signal that is to be 3. 10-9 attenuation and additive white transmitted through this channel is m (t) # 50 Cos (10000?), and the carrier signal that will be used in each ofthe following modulation schemes is c(t) = 100 Cos (40000m). n(t) 20 m(t) x() Channel wit (0...
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 =...
Air in a piston-cylinder assembly executes a Carnot power cycle (4 internally reversible processes, shown in the figure below). The isothermal expansion and compression processes occur at TH 1400 K and Tc-350 K, respectively. The pressure at the beginning and end of the isothermal compression are p4-100 kPa and pi - 500 kPa, respectively Assume the ideal gas model for the air: ai 0.717 J/g.K Mair- 28.97 g/mol kpv.air 1.4 R 8.314J /(mol K) Adiabatic Isothermal expansion Adiabatic compression Gas...
multi part question
4. Agricultural export subsidies in a small nation The following graph shows the market for wheat in Canada, where Dc is the demand curve, Sc is the supply curve, and Pw is the free trade price of wheat. Assume that Canada is a relatively small producer of wheat, so changes in its output do not affect the world price of wheat. Also assume that Canada is currently open to free trade, and domestic consumers are able to...
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...
(100 points) Figure below shows the schematic diagram of a two-stage cascade refrigeration system (also called the Economizer 2-Stage Refrigeration Cycle). Comparing to the cascade two-stage refrigeration system discussed in In-class Activity #10a, in this case, the flash chamber (now called Flash Intercooler) is still used but the mixing chamber is removed. The superheated vapor (2) out of the low-pressure compressor (1) is routed into the flash chamber, and the saturated vapor (3) out of the flash chamber enters directly...
Question 4 [12 marks] Some applications of mathematics require the use of very large matrices (several thousand rows for example) and this in turn directs attention to efficient ways to manipulate them. This question focuses on the efficiency of matrix multiplication, counting the number of numerical arithmetic operations (addition, subtraction and multiplication) involved. We start with very simplest case of 2x2 matrices. (a) The standard way of multiplying 2x2 matrices uses 8 multiplications and 4 additions. List the 8 products...
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