Reheat in Rankine cycle

Hello Viewers, Dr. Amit Mandal here, Its a demonstration to understand the purpose of Reheat in Rankine cycle , Ideal Reheat cycle. The main purpose of reheat is to reduce the wetness of steam before entering the turbine. It is the process of reheating the steam after it has expanded partially in the high-pressure turbine. In a simple Rankine cycle, the steam is expanded from a high pressure and temperature to a low pressure and temperature in a single turbine. This results in a significant amount of moisture in the steam at the exit of the turbine. This moisture can damage the turbine blades and reduce the efficiency of the cycle.In a reheat Rankine cycle, the steam is expanded partially in the high-pressure turbine, then reheated in a reheater to its original temperature or a higher temperature. The reheated steam is then expanded further in the low-pressure turbine.
Reheating the steam increases the thermal efficiency of the cycle in two ways:
1) It reduces the amount of moisture in the steam at the exit of the low-pressure turbine, which improves the efficiency of the turbine and reduces the risk of blade damage.
2) It increases the mean temperature of heat addition to the cycle,
Reheat Rankine cycles are commonly used in large power plants because they offer higher thermal efficiency than simple Rankine cycles.

[@blessingxaba5874]

thank you very much, Sir, super explanation. Sir for Qin are you not including (h3 - h2) + (h5 - h4) I have heard you only talking about (h1 -h8) for energy in

[@shubhasmitkarjee3270]

in the last part while explaining the double reheat cycle.....shouldn't the total heat input be (h1 - h8)+(h3 - h2
)+(h5 - h4)

[@Dr.AmitMandal]

Yes, Nobody told me that, kindly take the correct concept. It was by mistake....

[@muzammilraja9440]

excellent and conceptual explanation sir!! THANKS

[@pavankalyan3869]

simply super sir expecting more viedos from you in the field of mechanical engineering

[@ashishvitekar3474]

Very nice explain and informative video's keep it up.
Thank you very much

[@nayemvai4773]

Thanks a lot.. Now this time.. I m ur big fan.. From Bangladesh..

[@suhaibkhan7805]

Excellent Sir

[@MRCRB-ml8pi]

thanks for the uploading the videos .it is very helpful.

[@suhaibkhan7805]

Best Taught

[@AmanPandey-pf7rq]

sir, why a low pressure turbine used in reheat cycle, why can we not keep the pressure in seond turbne same as the first one?

[@Dr.AmitMandal]

At the exit of HPT , the pressure of vapor is low with which the vapor enters the boiler for secondary heating, in boiler the heat addition is at constant pressure hence not possible...

[@AbhijeetSingh-yh1tj]

Amazing video sir..helped a lot

[@koustavpramanick8373]

but what is the necessity of reheating if we can get little less efficiency by rankine cycle......does it justified for the cost that used in making that more complex reheat cycle over rankine cycle? as reheat cyle appratus cost much more than normal rankine cycle appratus.....

[@Dr.AmitMandal]

+Koustav Pramanick reheat doesnt always decreases the efficiency . As a thumb rule the reheat pressure must be 1/4 pressure of the steam when it is entering preceding high pressure turbine .it can increase the efficiency as well as control the dryness fraction. Secondly wetness damages turbine blades rapidly which also involves cost application for remedial measures.

[@koustavpramanick8373]

Amit Mandal thank you sir for your helpful reply....

[@koustavpramanick8373]

Amit Mandal i would be expecting a video on binary vapour cycle and modified rankine cycle from you....thank you

[@Dr.AmitMandal]

+Koustav Pramanick check my video on binary vapor cycle...

[@sumitmishra5051]

Sir , very well experienced

[@akshaymanikjade]

Wonderful explanation sir....we expect that please upload all that concept video lecture which would difficult to understand.
God bless you for your nice work and sharing of knowledge....!!👌👍👍

[@tamilarasanranigovinth1458]

Super explanation ..thanq u sir

[@Abhishek-i2n]

Very well explained sir .keep the momentum .

[@webhosting2601]

Please why does point 3 sometime fall inside the dome?

[@deepakjoy8578]

Sir. You Are Great.

[@alternate_lyrics_telugu]

Thank you Amit

[@ghulamhabib7810]

THANKS

[@mdrafsunalambhuiyan8684]

Thank you so much!! You are the best!

[@Bardanibol5]

Excellent

[@aniketkamble8971]

From the basics to extream... every single thing is well explained! Enjoyed the lecture 🙏 Thank you so much sir🙏

[@maheshtedlapu1786]

Great video sir. I have one doubt. How is the boiler working at two different pressures in the reheat cycle?

[@rajeevbr7860]

Very nice explanation

[@iamchandrasekharreddy2294]

Sir we connecting all the turbines on same shaft than how can we attain more work.
Plz clarify my doubt.