The device that causes pressure and temperature drop in the refrigeration cycle is the _______________________
Answers
The device that causes pressure and temperature drop in the refrigeration cycle is the expansion valve.The refrigeration cycle is a cyclic process used to move heat from one place to another. It can be used for air conditioning or refrigeration purposes.
The refrigeration cycle consists of four major components, including compressor, condenser, expansion valve, and evaporator.The compressor is the first component of the refrigeration cycle that receives the refrigerant in a low-pressure state and compresses it to a high-pressure state. The condenser is the second component of the refrigeration cycle that receives the high-pressure refrigerant from the compressor and removes heat from it to change the refrigerant from a high-pressure vapor to a high-pressure liquid.
The third component is the expansion valve, which reduces the pressure and temperature of the refrigerant. The fourth component is the evaporator, which receives the refrigerant from the expansion valve and removes heat from the surrounding environment to change the refrigerant from a low-pressure liquid to a low-pressure vapor.The function of the expansion valve is to cause pressure and temperature drop in the refrigerant.
The expansion valve receives the high-pressure liquid refrigerant from the condenser and releases it through a small orifice. As a result, the pressure and temperature of the refrigerant decrease. The low-pressure liquid refrigerant then enters the evaporator to absorb heat from the surrounding environment and evaporates into a low-pressure vapor. The cycle is then repeated.
To know more about refrigerant visit:
brainly.com/question/33440251
#SPJ11
Related Questions
in the standard motion picture camera, the shutter closes on the gate and allows light to hit the mirror and travel through which component?
Answers
"In a standard motion picture camera, the shutter closes on the gate, allowing light to hit the mirror. The light then travels through the lens, which is the essential component for focusing and capturing the image."
A standard motion picture camera is a device used to capture moving images onto film or digital media. It typically consists of a lens system, film or sensor mechanism, and a body or housing. The camera operates by exposing individual frames of film or capturing digital video at a specific rate, creating the illusion of motion when played back at a consistent speed. These cameras come in various formats and configurations, including 35mm film cameras and digital cinema cameras, each with their own features and capabilities.
Some examples of standard motion picture cameras include:
1. Arri Alexa: A popular digital cinema camera used in the film and television industry, known for its high-quality image capture and versatility.
2. Red Epic-W: Another widely used digital cinema camera that offers high-resolution, high dynamic range (HDR) capabilities, and a modular design for customization.
3. Panavision Millennium DXL: A digital cinema camera developed by Panavision in collaboration with Red Digital Cinema, known for its large-format sensor and ability to capture high-resolution images.
4. Sony Venice: A digital cinema camera known for its exceptional image quality, wide dynamic range, and flexible recording options.
5. Blackmagic URSA Mini Pro: A compact and versatile digital cinema camera that supports various lens mounts, offers high-resolution capture, and includes built-in ND filters.
6. Aaton Penelope Delta: A film camera known for its ergonomic design, quiet operation, and compatibility with both 35mm and 16mm film formats.
7. Panavision Panaflex: A classic film camera that has been widely used in the industry for decades, known for its reliability and high-quality image capture.
8. Arriflex 435: A 35mm film camera that has been widely used in feature film production, known for its precision and versatility in capturing motion pictures.
These are just a few examples, and there are many other motion picture cameras available, each with its own features and specifications.
To know more about standard motion picture camera visit:
https://brainly.com/question/19439984
#SPJ11
What were the trade-offs and opportunity costs of one of Teasha’s economic decisions?
Answers
Answer:
Opportunity cost she loses the chance to get the degree. The trade- off is she gets to start a business.
Explanation:
For the network of Fig. below, draw the output waveform if Vr = 4.3V , R = 1000Omega and Vi=25 sin ot. Assume an Si diode is used. + R D V_{i}; V_{r}; V_{o}
Answers
What is the basic requirement of measurements?
Answers
The basic requirement of measurements is to have a standard or reference point against which to compare the quantity being measured. This standard or reference point should be well-defined and stable, and the measurement process should be repeatable and consistent. Additionally, it is important to ensure that the measurement equipment is calibrated and in good working condition.
Answer:
The most basic requirement for measurements is the presence of a standard or reference point against which the quantity being measured can be compared. The measurement process should be repeatable and consistent, and the standard or reference point should be well-defined and stable. Furthermore, ensure that the measurement equipment is calibrated and in good working order.
Explanation:
Where are revolved sections placed in a print? A) in between break lines B) cutting planes are used to identify their locations C) in between section lines D) stand alone
Answers
Answer:
B. Cutting planes are used to identify their locations.
Explanation:
Revolved view is a cross section view of revolved 90 degrees around a cutting plane projections. The revolved view of print will differ from a cross sectional view. It includes a line nothing the axis of revolution for the view. The correct answer is B. The revolved section in the prints has cutting planes that will be used to identify their location.
On-vehicle headlight aligners are calibrated to the floor at the point where the _______ wheels contact the concrete.
Answers
On-vehicle headlight aligners are calibrated to the floor at the point where the alignment wheels contact the concrete.
What is calibration in wheel alignment?Wheel alignment is known to be n aspect of standard automobile maintenance that is known to be made up of adjusting the angles of the wheels so that it can be able to set to the car in regards to the maker's specification.
Hence, based on the above, On-vehicle headlight aligners are calibrated to the floor at the point where the alignment wheels contact the concrete.
Learn more about Wheel alignment from
https://brainly.com/question/4070517
#SPJ1
The requirement that all 125 volt, 15 or 20 ampere receptacles in unfinished basements have GFCI protection for personnel includes all the following except for: A. A receptacle installed for a burglar alarm B. receptacles installed for laundry equipment C. a receptacle installed specifically for a personal computer D. a single or duplex receptacle installed to serve dedicated appliances such as refrigerators Oosted to it
Answers
The requirement that all 125 volt, 15 or 20 ampere receptacles in unfinished basements have GFCI protection for personnel includes all the following except for A receptacle installed for a burglar alarm. The correct answer is option a.
What is GFCI?Ground Fault Circuit Interrupter (GFCI) is an electrical safety device that automatically trips the circuit when a ground fault is detected. GFCIs protect against electrical shock hazards by interrupting electrical flow if it senses any electrical current going through an unintended path, such as through water or a person.
What is the requirement that all 125-volt, 15 or 20-ampere receptacles in unfinished basements have GFCI protection for personnel?Any 125-volt, 15 or 20-ampere receptacles in unfinished basements must be equipped with GFCI protection to protect people from electrical shock hazards. Only receptacles that are used for dedicated devices and systems, such as fire alarm devices, are excluded from this regulation. These receptacles will be wired directly to a specific device or system and will not be used for any other purposes.
Except for a receptacle installed for a burglar alarm, all other receptacles, such as receptacles installed for laundry equipment, a receptacle installed specifically for a personal computer, and a single or duplex receptacle installed to serve dedicated appliances such as refrigerators, should be equipped with GFCI protection.
Learn more about Ground Fault Circuit Interrupter here: https://brainly.com/question/9949726
#SPJ11
A particular brand of paint covers 340 square feet per gallon . Write a program in C++ to determine and report approximately how many gallons of paint will be needed to paint two coats on a wooden fence that is 6 feet high and 100 feet long .
Answers
Answer:
#include <iostream>
using namespace std;
// named constant to give mnemonic name to "magic number"
const float SqFtPerGal = 350.0f;
// the function main() is always the entry point of the application
int main()
{
float length, width, area, paint; // to hold user values and results
// prompt user for length and width of wall
cout << "Enter length of wall : " << flush;
cin >> length;
cout << "Enter width of wall : " << flush;
cin >> width;
// calculate area and amount of paint needed
area = length * width;
paint = area / SqFtPerGal;
// output results with reasonable text
cout << "You need " << paint << " gallons of paint to cover "
<< area << " square feet of wall." << endl;
// program stops executing when it returns from main(), 0 means O.K.
return 0;
}
Explanation:
What error results if the curvature and refraction correction is neglected in trigonometric leveling for sights: (a) 3000 ft long (b) 1200 m long (c) 4500 ft long?
Answers
The error results if the curvature and refraction correction is neglected in trigonometric levelling for sights are
(a) 3000 ft long. = 0.1854 ft
(b) 1200 m long = 0.0972 m
(c) 4500 ft long = 0.4172 ft
What is levelling?This refers to the term in surveying used to describe taking measurements of heights with reference to a datum. Levelling is achieved using levelling instruments.
How to find the error results if the curvature and refraction correction is neglectedgiven data
(a) 3000 ft long
(b) 1200 m long
(c) 4500 ft long
(a) 3000 ft long
= 0.0206 * F^2
= 0.0206 * ( 3000 / 1000 )^2
= 0.0206 * ( 3 )^2
= 0.0206 * ( 9 )
= 0.1854 ft
(b) 1200 m long
= 0.0675 * K^2
= 0.0675 * ( 1200 / 1000 )^2
= 0.0675 * ( 1.2 )^2
= 0.0675 * ( 1.44 )
= 0.0972 m
(c) 4500 ft long
= 0.0206 * F^2
= 0.0206 * ( 4500 / 1000 )^2
= 0.0206 * ( 4.5 )^2
= 0.0206 * ( 20.25 )
= 0.4172 ft
Read more on corrections for curvature and refraction here: https://brainly.com/question/20820908
#SPJ1
please help with my economics problem
Answers
Answer:
You first get a new job, and make a new company and then by amazon to traumatize Jeff Bezos after his divorce
Explanation:
The ___ outlines the problem in clear terms.
Answers
Answer: Problem Statement
Explanation:
When going about designing a new product or an improvement to an existing product, it is important to state the problem in a clear and concise way so that the designers know precisely what they are working towards.
This is where a Problem statement comes in. It states the problem in a concise manner and juxtaposes the current shortcomings of the current system against what the system should ideally be in such a way that even though the solution is clear, it is not so precise that it makes the designers narrow-minded.
Calculate the internal energy and enthalpy changes that occur when air is changed from an initial state of 277 K and 10 bars, where its molar volume is 2.28 m²/kmol to a final state of 333 K and 1 atm. Assume for air PV/T is constant (i.e it is an ideal gas) and Cv = 21 and Cp = 29.3 kg/kmol-¹
Answers
Answer:
PV/T is constant and that CV=21 kJ/kmolK and CP=29.3 kJ/kmol.K
Explanation:
To calculate the internal energy and enthalpy change for the given air system, we can use the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done
CODE
PUZZLE 92
B
C
M
H
K
1
M
Fiil the square with numbers with albhabets
Answers
Answer:
Explanation:
I'm not 100% this is what you want, but here it is:
2
3
13
8
11
A
13
A hiker collected several rocks along her trek through the forest for her geology project. she needed to classify each of the rocks into a category based on physical characteristics. what type of investigation did she conduct?
Answers
To group the rocks into different categories based on their physical attributes. She conducted research on texture and composition.
Two criteria—TEXTURE and COMPOSITION—are used to categorize rocks. The sizes, shapes, and relationships between the many mineral grains and other components that make up a rock are what determine its texture. The process that created the rock controls these elements. Color, hardness, luster, crystal formations, density, and cleavage are characteristics that aid in the identification of minerals in rocks by geologists. Crystal structure at the atomic level principally determines crystal shape, cleavage, and hardness. The chemical makeup mostly determines color and density. The most prevalent physical characteristics are those related to crystal structure, color, hardness, cleavage, and specific gravity. Examining a mineral's crystal shape is one of the finest ways to identify it.
Learn more about rocks here:
https://brainly.com/question/9531722
#SPJ4
three condition necessary for the formation of stationary
wave
Answers
Answer:
Two waves must be having same wavelength, frequency, amplitude and travelling in the opposite direction.
Under normal operating conditions, the electric motor exerts a torque of 2.8 kN-m.on shaft AB. Knowing that each shaft is solid, determine the maximum shearing stress in a) shaft AB b) shaft BC c) shaft CD (25 points) Given that the torque at B
Answers
Answer:
Explanation:
The image attached to the question is shown in the first diagram below.
From the diagram given ; we can deduce a free body diagram which will aid us in solving the question.
IF we take a look at the second diagram attached below ; we will have a clear understanding of what the free body diagram of the system looks like :
From the diagram; we can determine the length of BC by using pyhtagoras theorem;
SO;
\(L_{BC}^2 = L_{AB}^2 + L_{AC}^2\)
\(L_{BC}^2 = (3.5+2.5)^2+ 4^2\)
\(L_{BC}= \sqrt{(6)^2+ 4^2}\)
\(L_{BC}= \sqrt{36+ 16}\)
\(L_{BC}= \sqrt{52}\)
\(L_{BC}= 7.2111 \ m\)
The cross -sectional of the cable is calculated by the formula :
\(A = \dfrac{\pi}{4}d^2\)
where d = 4mm
\(A = \dfrac{\pi}{4}(4 \ mm * \dfrac{1 \ m}{1000 \ mm})^2\)
A = 1.26 × 10⁻⁵ m²
However, looking at the maximum deflection in length \(\delta\) ; we can calculate for the force \(F_{BC\) by using the formula:
\(\delta = \dfrac{F_{BC}L_{BC}}{AE}\)
\(F_{BC} = \dfrac{ AE \ \delta}{L_{BC}}\)
where ;
E = modulus elasticity
\(L_{BC}\) = length of the cable
Replacing 1.26 × 10⁻⁵ m² for A; 200 × 10⁹ Pa for E ; 7.2111 m for \(L_{BC}\) and 0.006 m for \(\delta\) ; we have:
\(F_{BC} = \dfrac{1.26*10^{-5}*200*10^9*0.006}{7.2111}\)
\(F_{BC} = 2096.76 \ N \\ \\ F_{BC} = 2.09676 \ kN\) ---- (1)
Similarly; we can determine the force \(F_{BC}\) using the allowable maximum stress; we have the following relation,
\(\sigma = \dfrac{F_{BC}}{A}\)
\({F_{BC}}= {A}*\sigma\)
where;
\(\sigma =\) maximum allowable stress
Replacing 190 × 10⁶ Pa for \(\sigma\) ; we have :
\({F_{BC}}= 1.26*10^{-5} * 190*10^{6} \\ \\ {F_{BC}}=2394 \ N \\ \\ {F_{BC}}= 2.394 \ kN\) ------ (2)
Comparing (1) and (2)
The magnitude of the force \(F_{BC} = 2.09676 \ kN\) since the elongation of the cable should not exceed 6mm
Finally applying the moment equilibrium condition about point A
\(\sum M_A = 0\)
\(3.5 P - (6) ( \dfrac{4}{7.2111}F_{BC}) = 0\)
\(3.5 P - 3.328 F_{BC} = 0\)
\(3.5 P = 3.328 F_{BC}\)
\(3.5 P = 3.328 *2.09676 \ kN\)
\(P =\dfrac{ 3.328 *2.09676 \ kN}{3.5 }\)
P = 1.9937 kN
Hence; the maximum load P that can be applied is 1.9937 kN
what is asme code for shaft design?
Answers
For the creation and production of mechanical components, including shafts, the American Society of Mechanical Engineers (ASME) offers standards and guidelines.
What do you understand by the term ASME?The ASME B107.1 "Standard for Socket Cap, Shoulder, Set, and Butt Screws (Inch Series)" code, which offers guidelines for the design and manufacture of shafts used with socket head screws, is one of the commonly used codes for shaft design.
The ASME B31.1 "Power Piping Code," which offers standards for the design and execution of piping systems used to transfer power, is another frequently used ASME code for shaft design.
The specific ASME code that is suited for a given application will rely on the needs and specifications of the that specific project. It is crucial to note that these are only two instances of ASME codes that can be used for shaft design.
To know more about code visit:-
https://brainly.com/question/2094784
#SPJ4
define a class named history with the following public interface: class history { public: history(int nrows, int ncols); bool record(int r, int c); void display() const; }; the constructor initializes a history object that corresponds to an arena with nrows rows and ncols columns. you may assume (i.e., you do not have to check) that it will be called with a first argument that does not exceed maxrows and a second that does not exceed maxcols, and that neither argument will be less than 1. the record function is to be called to notify the history object that a poisoned carrot has been dropped at a grid point that does not currently have a poisoned carrot. the function returns false if row r, column c is not within the bounds implied by the history constructor; otherwise, it returns true after recording what it needs to. this function expects its parameters to be expressed in the same coordinate system as an arena (e.g., row 1, column 1 is the upper-left-most position). the display function clears the screen and displays the history grid as the posted programs do. this function does clear the screen, display the history grid, and write an empty line after the history grid; it does not print the press enter to continue. after the display (that should be done somewhere else in the program). (note to xcode users: it is acceptable that clearscreen() just writes a newline instead of clearing the screen if you launch your program from within xcode, since the xcode output window doesn't have the capability of being cleared.)
Answers
The logical point where different software entities communicate is known as a public interface in computer science.
What is meant by public interface?The logical point where different software entities communicate is known as a public interface in computer science. A single computer, a network, or a variety of other topologies may be used for the entities to interact with one another.A class's public properties and methods (variables or fields you may read the values of or assign to) form its public interface (functions you can call). Therefore, the task is to develop something that is not a subclass of LinkedList.For instance, protected methods could be accessed by creating a subclass.Due to the fact that an interface is a contract meant to be utilized by other classes, interface methods are implicitly public in C#. Moreover, when you implement these methods, you have to declare them to be public rather than static.To learn more about public interface refer
https://brainly.com/question/14999753
#SPJ4
A heat rate of 3 kW is conducted through a section of an insulating materials of cross-sectional area 10 m^2 and thickness 2.5 cm. If the inner (hot) surface temperature is 415°C and the thermal conductivity of the material is 0.2 W/m*k , what is the outer surface temperature?
Answers
Answer: The outer surface temperature is \(377.5^{o}C\).
Explanation:
Given: Heat = 3 kW (1 kW = 1000 W) = 3000 W
Area = 10 \(m^{2}\)
Length = 2.5 cm (1 cm = 0.01 m) = 0.025 m
Thermal conductivity = 0.2 W/m K
Temperature (inner) = \(415^{o}C\)
Formula used is as follows.
\(q = KA \frac{(t_{in} - t_{out})}{L}\)
where,
K = thermal conductivity
A = area
L = length
\(t_{in}\) = inner surface temperature
\(t_{out}\) = outer surface temperature
Substitute the values into above formula as follows.
\(q = KA \frac{(t_{in} - t_{out})}{L}\\3000 W = 0.2 \times 10 \times \frac{415 - t_{out}}{0.025 m}\\t_{out} = 377.5^{o}C\)
Thus, we can conclude that the outer surface temperature is \(377.5^{o}C\).
Use the following clues to help fill in the chart on the next page. Put an X in the spaces that are INCORRECT and Highlight the
CORRECT
1 The wizard with the lavender wand is in Ravenel or Sparrowan, and earned 50 or 60 points
2. Gorgonscale earned 10 points less than Sparrowman
3 Lynn scored 20 points less than the wizard with the incense wand.
4. Timmy scored 70 or 80 points. He is in Gorgonscale or Hydraden
5. Among Bennie and the wizard from Sparrowan, one earned 70 points and the other has the lavender wand.
6. The mandragore wand belongs to Edward or to the House of Hydraden
7 Ravenel didn't earn 60 points and Edward is not among it's wizards
8. Bennie scored 10 points more than Edward
9. The wizard with the mandragore wand didn't earn 70 points.
Answers
For circuit shown, determine the total circuit current.
100 ΩξR,
R, S250 Ω
24 ν -
350 ΩξR,
R, 200 Ω
Answers
Answer:
I don't know the answer but you can download Ga u t h math to answer that
Explanation:
no spacing it is just can't lay aside
What type of drum system is mostly to be found on the rear of a modern front wheel drive vehicle ?
Answers
Drum Brakes are mostly to be found on the rear of a modern front wheel drive vehicle.
What Is Drum Brake?
Drum brakes have been around since 1900 ,patented until 1902 by Louis Renault.
A drum brake is a brake that , causes friction caused by a set of shoes or pads that press outward against a rotating cylinder-shaped part called a brake drum.It rotates at the same speed as the wheel. The drum surrounds a set of brake shoes that are coated in materials that generate friction.Types of drum brakes
Leading/Trailing Shoe type. Twin-leading shoeDuo Servo.To know more about drum brakes from the given link
https://brainly.com/question/14210776
#SPJ13
what strategic or management changes would you recommend for Bionx?
Answers
The creation of a strategy is guided by the readiness evaluations. Managing change: Some project plans incorporate change management strategies.
What are strategic or management changes?The process of managing change in an organised, deliberate manner in order to fulfil organisational goals, objectives, and missions is known as strategic change management.
Organizations must adapt if they are to survive and grow in the face of fierce industry rivalry.
Operating from 1998 to 2018, BionX was a Canadian company that produced bicycle conversion kits and electric motors for bicycles under the moniker EPS.
The BionX board of directors hired executive and made strategic changes to the senior leadership team in 2013 and 2014 in response to a 55% warranty return rate.
Thus, these are some changes that can be made.
For more details regarding management changes, visit:
https://brainly.com/question/11239217
#SPJ1
After cutting a PVC pipe you should use a
to debure the pipe
Answers
Answer:
Deburring Tool
Explanation:
A deburring tool is used in order to debur the PVC pipes. They are mostly used for the plastic pipes.
After the PVC pipes are cut, there are burrs on the pipe surface. To remove these burrs, a deburring tool is used. It removes the burrs form the edges of the PVC pipes that results from grinding, cutting, milling, drilling, etc.
The deburring tools are made from high speed steels.
Calculate the power required for heating a 1.5 kg sample of water for 10 minutes in a thermal system. What is the amount of energy required to raise the temperature of the water from 25°C to 60°C ? How much minimum amount of power does the heater have to supply per unit time? Why does the actual power rating of the heater need to be higher than this minimum amount? (The specific heat of water is 4.18 J/g°C .)
*60 points to anyone who can help*
Answers
Answer:
Power= Heat energy\ time
heat energy= mc∆T
specific heat of water = 4180
1.5*4180*(60-25)
=219450
time = 10× 60= 600 secs
power = 219450/600
Power= 365.75 Watt
=0.37 KW
Explanation:
the actual has to be bigger because the heater might be required to handle more ...also to accommodate extra energy.
3. All companies, small or large, are required to have a written fire prevention plan.
A) O True
B)O False
Answers
Answer:
A) True
Explanation:
Answer:
A. true
Explanation:
cause if they dont they could possibly get sgut down for safety hazards and violations of its' employee. And there could be a asccident because there was no safety.
What is the minimum amount of space required when passing a bicyclist?
Answers
According to the California Vehicle Code, the minimum amount of space required when passing a bicyclist is 3 feet.
When passing a bicyclist, drivers should be cautious and give them enough space. It's important to keep in mind that bicyclists are more vulnerable and have less protection than cars or trucks. So, drivers should always be mindful of their presence on the road and take extra precautions to ensure their safety. Passing a bicyclist should be done with care and caution, and drivers should only do so when it is safe to do so.
Drivers should also be aware that bicyclists may change their position on the road to avoid obstacles, so they should always leave enough space to allow for this. Besides that, when approaching a bicyclist from behind, the driver should give an audible signal, such as a honk, to alert the bicyclist of their presence. Drivers should also avoid any sudden movements or swerving, as this can startle or endanger the bicyclist. Overall, it's important to exercise caution and patience when driving near bicyclists and to always follow the law and respect their rights on the road.
To learn more about Vehicle :
https://brainly.com/question/24745369
#SPJ11
A(n) _____ is a manually operated device used in conjunction with a transfer switch to provide a means of directly connecting load conductors to a power source and of disconnecting the transfer switch.
Answers
A(n) interlock is a manually operated device used in conjunction with a transfer switch to provide a means of directly connecting load conductors to a power source and of disconnecting the transfer switch.
An interlock is designed to prevent simultaneous connection of load conductors to both the normal power source and the alternate power source. It ensures that only one power source is active at a time, thus preventing any back-feeding of power. The interlock mechanism typically consists of mechanical components that physically prevent the operation of the transfer switch and the connection of load conductors when the interlock is engaged.
By using an interlock, the operator can securely switch between the power sources, ensuring a safe and controlled transfer of electrical power. It adds an extra layer of protection by preventing any accidental or unauthorized connection to multiple power sources simultaneously. The interlock device plays a crucial role in maintaining the integrity of the power supply system and preventing potential hazards during power transfer operations.
learn more about interlock here
https://brainly.com/question/30870651
#SPJ11
A steam power plant operates on the reheat Rankine cycle. Steam enters the highpressure turbine at 12.5 MPa and 550°C at a rate of 7.7 kg/s and leaves at 2 MPa. Steam is then reheated at constant pressure to 450 °C before it expands in the low-pressure turbine. The isentropic efficiencies of the turbine and the pump are 85 percent and 90 percent, respectively. Steam leaves the condenser as a saturated liquid. If the moisture content of the steam at the exit of the turbine is not to exceed 5 percent, determine (a) the condenser pressure, (b) the net power output, and (c) the thermal efficiency
Answers
Answer:
A) condenser pressure = 9.73 kPa,
B) 10242 kw
C) 36.9%
Explanation:
given data
entrance pressure of steam = 12.5 MPa
temperature of steam = 550⁰c
flow rate of steam = 7.7 kg/s
outer pressure = 2 MPa
reheated steam temperature = 450⁰c
isentropic efficiency of turbine( nt ) = 85% = 0.85
isentropic efficiency of pump = 90% = 0.90
From steam tables
at 12.5 MPa and 550⁰c ; h3 = 3476.5 kJ/kg, S3 = 6.6317 kJ/kgK
also for an Isentropic expansion
S4s = S3 .
therefore when S4s = 6.6317 kJ/kg and P4 = 2 MPa
h4s = 2948.1 kJ/kg
nt = 0.85
nt (0.85) = \(\frac{h3-h4}{h3-h4s}\) = \(\frac{3476.5 - h4}{3476.5 - 2948.1}\)
making h4 subject of the equation
h4 = 3476.5 - 0.85 (3476.5 - 2948.1)
h4 = 3027.3 kj/kg
at P5 = 2 MPa and T5 = 450⁰c
h5 = 3358.2 kj/kg, s5 = 7.2815 kj/kgk
at P6 , x6 = 0.95 and s5 = s6
using nt = 0.85 we can calculate for h6 and h6s
from the chart attached below we can see that
p6 = 9.73 kPa, h6 = 2463.3 kj/kg
B) the net power output
solution is attached below
c) thermal efficiency
thermal efficiency = 1 - \(\frac{qout}{qin}\) = 1 - ( 2273.7/ 3603.8) = 36.9% ≈ 37%
WILL GIVE BRAINLEY PLZZZZZZZ
how is a electrical resistance similar to the diameter of a pipe of water
Answers
Answer:
The resistance of the flow of charges in an electric circuit (electrical resistance) is analogous to the frictional effect between water flow through a pipe and the pipe's surface
Explanation:
In comparison to its similarity to the diameter of the pipe affects the flow of water and acts a a factor affecting resistance so are there factors affecting electrical resistance.
in an electrical circuit:
the total length of the wire is to the length of a pipe of water
the cross-sectional area of the wire is to the diameter of a pipe of water.
Thus, the cross sectional are affects the amount of electrical resistance. Wider wires have wider cross-sectional area and vice versa. Also, water will flow (i.e. current) through a wider pipe (i.e. large diameter) at a faster rate than a narrow pipe (i.e. small diameter). This is due to the lower amount of resistance offered by the wider pipe.
in the same manner, the wider the wire, the lesser the electrical resistance to the flow of elsctric charge and vice versa for thiner wires.