Questions
An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor...

An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor as saturated vapor at 40 psia and leaves the condenser as saturated liquid at 80 psia. Water enters the ice machine at 55°F and leaves as ice at 25°F. For an ice production rate of 21 lbm/h, determine the power input to the ice machine (169 Btu of heat needs to be removed from each lbm of water at 55°F to turn it into ice at 25°F).
The power input to the ice machine is ?
Answer should be gotten in hp(horsepower)

In: Electrical Engineering

For a resistance and capacitance in series with a voltage source, show that it is possible...

For a resistance and capacitance in series with a voltage source, show that it is possible to draw a phasor diagram for the current and all voltages from magnitude measurement of these quantities only.Ilustrate your answer graphieally

In: Electrical Engineering

A binary counter has one input X and counts as follows. If X = 0, it...

A binary counter has one input X and counts as follows. If X = 0, it counts 2, 3, 1 and repeats; if X = 1, it counts 1, 0, 3 and repeats. You can assume that the following cases do not occur: counter value is 0 with X = 0, and counter value is 2 with X = 1.

(a) Draw the state diagram of the binary counter above. Use the binary counting values as the state names. You do not need to represent the state transitions for the cases that do not occur.

(b) Use two D-type flip-flops and logic gates to design the binary counter. In your answers, include the state table, the flip-flop input equations and the final logic circuit diagram.

In: Electrical Engineering

Write a matlab code for given task Use your ‘sin’ or ‘cos’ function to generate a...

Write a matlab code for given task

Use your ‘sin’ or ‘cos’ function to generate a sinusoid wave having two components as
f1 = 3kHz and f2 = 5kHz and then sample it with fs = 10kHz. Calculate its fft with zero frequency
component in the middle. Plot it on a properly scaled w-axis. Specify if there is aliasing or not?
If there is aliasing specify which component is casing the aliasing

In: Electrical Engineering

A coreless Dc motor is attached with a whell.Generate its tranfer fucntion and kinametis with proper...

A coreless Dc motor is attached with a whell.Generate its tranfer fucntion and kinametis with proper book refrence page(Introduction to robotics) and solution.

In: Electrical Engineering

Conceptualize the cut off region and a saturation region of a BJT.

Conceptualize the cut off region and a saturation region of a BJT.

In: Electrical Engineering

A three phase, 60 Hz, 480 V, Y-connected, two-pole synchronous generator has a synchronous reactance of...

A three phase, 60 Hz, 480 V, Y-connected, two-pole synchronous generator has a synchronous reactance of 0.95 Ω per phase. Its armature resistance is negligible. Its combined friction and windage losses are 1.3 kW and its core losses are 0.95 kW. The field current is constant at no-load. Its full load armature current is 55 A at 0.9PF lagging. Assume phase voltage is a reference. Determine following:

a) Its terminal voltage when it is loaded with the rated current at a power factor of 0.9 lagging

b) Its terminal voltage when it is loaded with the rated current at a power factor of 0.9 leading

Hence,

Answer for a (0.9 lagging) should equal VT= 433.59 V

Answer for b (0.9 leading) should equal VT= 512.486 V

In: Electrical Engineering

Design voltage x4 multiplier(Voltage quadrupler) if rms voltage of AC is 220V and frequency is 60Hz

Design voltage x4 multiplier(Voltage quadrupler) if rms voltage of AC is 220V and frequency is 60Hz

In: Electrical Engineering

Hello There What is the definiton of Net Zero Energy? and Please give the example of...

Hello There

What is the definiton of Net Zero Energy? and Please give the example of its usage... Thanks

In: Electrical Engineering

Analyze following program and Find Syntax errors. #include<iostream> int show(int x) int main() {     int A,B;...

Analyze following program and Find Syntax errors.

#include<iostream>

int show(int x)

int main()

{     int A,B;

      char B=10;

cout<<”Enter Value of A”;

cin<<A;

show(A)

show(50)   

      }

      cin.get();

}

int show(int x);

{

cout<<”Value is =” <<X

cout<<endl;

}

In: Electrical Engineering

a. State the ampere circuital law b. Derive expression for inductance of a Toroid? c. Derive...

a. State the ampere circuital law

b. Derive expression for inductance of a Toroid?

c. Derive the set of Maxwell’s equations with solutions in the integral form from the
fundamental laws of a good conductor?

d. Derive the expression for torque developed in a rectangular closed circuit current (I) in a
uniform field?

In: Electrical Engineering

Explain with the diagram the structure and theory of the work of a three-phase electric generator,...

Explain with the diagram the structure and theory of the work of a three-phase electric generator, specifying the function of each part ؟؟

In: Electrical Engineering

For the circuit 10 Vp AC with R=10 Ω, and L=8.2 mH (in series) compute XL...

For the circuit 10 Vp AC with R=10 Ω, and L=8.2 mH (in series) compute XL Z, iRMS, VR, VL for different frequencies ranging from f=20 Hz to f=100 Hz at 20 Hz intervals, and from then onwards, discrete values f= 200, 500, 1000, 2000 and 5000 Hz. Plot frequency (x-axis, logarithmic) vs. and frequency (x-axis, logarithmic). What happens to the circuit as frequency increases (which component is taking over?).

In: Electrical Engineering

Macro-Hydropower. A dam has a height of 220 meters. Total generating capacity for the power plant...

Macro-Hydropower. A dam has a height of 220 meters. Total generating capacity for the power plant at the dam is about 1 GW (1 million kW). Assume an effective head of 215 meters and generating efficiency of 90%.

  1. At maximum capacity, what flow is required through the dam’s turbines to generate its power?
  2. If the dam operates at 60% of capacity on average, how much energy does it produce in a year? Express your answer in watts (e.g., W, kW, MW, GW, etc.).
  3. How many people should this energy support, assuming average community consumption of 1000 kWh per year per person?
  4. How much coal would be required in a coal-burning power plant to generate the equivalent amount of energy as the Dam generates in a year? Assume that the dam generates 5 billion kWh hours (5×109 kWh or 5 terra-watt hours) of energy annually. How many coal cars would be required to carry this coal? How long would a train of these cars be?
    • The energy content of coal is 8,142 kWh/ton
    • The energy efficiency of a typical coal-burning power plant is about 38%
    • A railroad coal car carries about 100 tons of coal and is about 22.86 m in length

In: Electrical Engineering

Take four 12VDC/7.5AH lead acid batteries. How different associations of these batteries affect the power? What’s...

Take four 12VDC/7.5AH lead acid batteries. How different associations of these batteries affect the power? What’s the key on defining the best arrangement?
.

In: Electrical Engineering