Temperature- Enthalphy Graph During Formation of Steam

Need help with your homework? Look no further! Our subject experts are ready to effortlessly handle your assignments, so you can finally say goodbye to stress and hello to top grades.

Please enable JavaScript in your browser to complete this form.
Click or drag files to this area to upload. You can upload up to 3 files.
Get a response in under 15 min

 

Temperature- Enthalphy Graph During Formation of Steam” = C

 

In this case the water at A tends to have a temperature of 0°C and the different stages of it are explained as below

Induction stage- it shows the heating of water up to the boiling temperature. Sensible heat is defined  to raise the temperature of water(1 kg mass) from 0°C to boiling point . it is illustrated by  is denoted as hf” Sensible heat  = mass of water x specific heat x rise in temperature where

1 x 4.2 t s + 273- 273] = 4.2 l 5

Where specific heat of water is taken as 4.2 KJ / kg.

Warming stage- the change of the state from liquid to steam is illustrated by BC. FG is the heat absorbed during this stages and is illustrated by the latent heat of vaporization (h18).

Evaporation stage- the superheating process is shown by CD. During this stage the heat absorbed is GI,I which is known as the heat of superheat. The Line AH is a representation of the total heat that is required to go to the superheated point D

Effect of change on pressure

If the pressure bar is increased to P1, then the boiling temperature is also bound to increase.

point *B1 –the boiling temperature or saturating temperature at P1 bar.

C1- dry saturated steam

Line C1D1 shows the constant pressure process in which the steam is superheated (after C1 point).

In a similar stature, the family of curves is different for various situations. The line A- B-B1- B2 is referred to as the saturated liquid line, as it is the boundary between the water and the steam. On the other hand C2- CcC-A1, is known as dry saturated steam as it is known to formulate the boundary between the dry and the superheated steam. The pressure tends to increase the latent heat of vaporization, and this is the stage where the saturation temperature tends to decrease. It reaches a stage of  zero at E where the liquid and dry steam lines meet. At the point E is referred to as a critical point for sure. For steam, critical temperature is 374.15°C and critical pressure is 221.2 bar.

Total heat (enthalpy) of dry saturated steam (point C) is Jz8 = h1 + h/g”

where  hg = enthalpy of 1 kg of dry saturated steam

f = sensible heat of 1kg of water

fg = enthalpy of vaporisation of 1 kg of dry saturated steam = Latent heat of

steam.

The enthalpy of heating of water upto saturation temperature

f  = c pf (T sat – 273.16)

where              c  pf = 4.18 kj / kg k.

Wet steam

mg= mass of actual dry steam

m1= mass of water in suspension

m = mass of wet steam

Dryness fraction

x = mg / mg + mf

x is also called the quality of wet steam

for x = 0, it is saturated liquid

for x = 1, it is dry and saturated steam.

0 < x < 1.

Internal energy:     h = u + P f

f stands for fluid (water)

u1= hrPv1

for dry steam              u g = hg – P v g

g stands for gas (vapour).

(d) sp. enthalpy of wet steam:

h = h1+ xh fg

(e) sp. enthalpy of superheated steam:

sup = h f+ h fg + C pg U sup – t sat)

c g for steam = 2.1 KJ /kg0k.

t sup – t snt = Degree of superheat.

Specific volume: Specific volume of wet steam

v =v1+x(vg -v1)

= x vg + (1 – x) v1

Charles law when       P = C

sup / T sup = u g / T sat

(g) Specific entropy : specific entropy of wet steam

s = s1 + x (Sg – s1)

(h) Work done during evaporation

=P(vg -v1)

= Pv g as v1= negligible

(i) Work done during evaporation of a wet state

= Px vg.

(j) work done by superheated steam

‘Pv sup.

(k) specific entropy of steam:

The steam is produced at constant pressure. The entropy is assumed to be zero at 0°C.

Change m· spec1· f·1 c entropy= ds = dQ / T

(i) The heat supplied for heating 1 kg of water at constant pressure is given by

D θ = c pf dT

ds = c pf dT / T

Integrating

or                                 s = c pf in T sat / 273

(ii) The change in entropy during evaporation is given by

fg = h fg / T sat

(iii) The change in entropy during evaporation is given by

g = s f + s fg

= c pf in T sat / 273 + h fg / T sat

(iv) Entropy during superheating of steam is given by

(v) Entropy of superheated steam is given by

sup = s g + s gj

= c pf in T sat / 273 + h fg / T sat

wherecp g = sp heat of superheated steam

= 2.1 KJ/ kg° K

And                             c pf = 4.18 KJ/ kg0K.

 

Links of Previous Main Topic:-

Links of Next Mechanical Engineering Topics:-

Homework Blues?

Get expert help with homework for all subjects.

  • NPlagiarism-free work
  • NHonest Pricing
  • NMoney-back guarantee

Latest Reviews

Solved Sample Works

Accounting Homework

Corporate Accounting Sample

Biology Homework

Genetics Assignment Sample

Essay Writing Help

Business Plan Sample

Homework Help FAQs

Our Answers to Your Questions

How do I submit my homework?
K
L

Getting homework help is very simple with us. Students can either send us the homework via email or they can upload it to our online form here. For a quicker response, You can also chat with us at WhatsApp and submit homework directly. You are sure to get a response from our side within 10 minutes.

How much will my homework cost?
K
L

The cost of paying someone to do your homework varies depending on the service and the type of assignment. We have listed our standard pricing plans for popularly used writing services. For other kind of assignments, You can get a free instant quote from us using our online form.

We also accept partial payment to start working on your assignment help. You can pay the remaining amount when your task gets completed. No pressure of up-front payment. No hidden order costs.

Can I receive help with my homework anytime?
K
L

Yes, you can receive help with your homework anytime with us. Our online homework help services are available 24/7, allowing you to receive assistance with your homework anytime, anywhere.

For urgent homework requests, reach out to us through our LiveChat or WhatsApp channels and one of our friendly support agents will assist you in finding the right expert for your online homework help request immediately. With our services, you can rely on 24/7 availability and meeting deadlines.

Are online homework websites budget-friendly for students like me?
K
L

Yes, Our Online Homework Help websites are an affordable solution for you as a student. Compared to traditional tutoring services, MyHomeworkHelp prices their homework help services honestly and within the budget of college students. This makes it easier for you to receive assistance with your homework without breaking the bank.

What is your plagiarism-free policy?
K
L

At myhomeworkhelp, we take plagiarism very seriously and ensure that all solutions provided by our tutors are original and authentic. Our tutors are trained to provide custom-made solutions, tailored specifically to meet the requirements of each student. We do not provide pre-written papers. All our homeswork solutions are made from scratch, guaranteeing 100% orignal homework answers.

Additionally, we have strict plagiarism-detection tools in place to check all submissions for authenticity.

Is using an Online Homework Help Service cheating?
K
L

Using online homework help services is not equivalent to cheating. Our services are intended to support students with their homework and provide them with the resources they need to succeed academically. With the help of our online homework help services, students can receive immediate assistance with their homework from any location, at any time.

At myhomeworkhelp, we are committed to promoting academic integrity. Our tutors provide solutions that serve as guides for drafting your own work. It is not acceptable to submit someone else's work as your own, as this constitutes academic plagiarism.

Can I chat with my tutor?
K
L

Using our secure chat board, you can now chat directly with your assigned tutor. The chats are encrypted both ways to secure your privacy. This makes your contact with the tutor directly & confidentially, so you can better explain any requirements or changes if needed or just need updates.

You can't contact the experts outside of chat board platform. Sharing any personal information, including but not limited to contact information, goes against our Terms and Conditions and therefore may result in permanently blocking you from the platform. We take any personal data very seriously and we do it for the safety of our users.

Know more about chat board here.

What is your money-back guarantee policy?
K
L

It’s worth noting that our online homework help service rarely leads to disappointment among students. Our expert tutors, along with our support and quality assurance team, are dedicated to providing the best possible experience for our customers. However, if for any reason a student is unsatisfied with their homework help solution, we offer unlimited revisions until they are fully satisfied.

In the rare event that a student remains unsatisfied even after revisions, we offer a money-back guarantee. We want all of our students to feel confident and secure when they turn to us for assistance with their homework, and this guarantee is just one way that we demonstrate our commitment to providing the best possible service. If you have any concerns about our services or the quality of the work you receive, please contact us for support.

What is the expertise of the tutor assigned to do my homework?
K
L

At myhomeworkhelp, we take pride in our team of qualified and experienced tutors. All of our tutors undergo a rigorous selection process and are required to have a minimum of a master's degree in their respective fields. Additionally, they must pass a series of tests to demonstrate their proficiency and ability to deliver quality work. We believe in transparency and providing our clients with the best possible service. You can be confident in the expertise of the tutor assigned to do your homework.

What about privacy & confidentiality?
K
L

Using My Homework Help is absolutely safe. We care about your security, therefore we encrypt all personal data to make every user feel safe while using our services and we don’t share any personal information with any third parties without your permission. Your credit card information is not stored anywhere at My Homework Help, and use of PayPal relies on their secure payment networks. Your identity, payment and homework are in safe hands. You can always be certain of getting professional help and remaining anonymous, while using My Homework Help.