Title 22566 POWER PLANT ENGINEERING SUMMER 2024 MODEL ANSWER.pdf ✅

MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION (Autonomous) (ISO/IEC - 27001 - 2013 Certified) 1/12 | Page SUMMER-2024 EXAMINATION Model Answer – Only for the Use of RAC Assessors Subject Name: Power Plant Engineering Subject Code: Important Instructions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2) The model answer and the answer written by candidate may vary but the examiner may try to assess the understanding level of the candidate. 3) The language errors such as grammatical, spelling errors should not be given more Importance (Not applicable for subject English and Communication Skills 4) While assessing figures, examiner may give credit for principal components indicated in the figure. The figures drawn by candidate and model answer may vary. The examiner may give credit for any equivalent figure drawn. 5) Credits may be given step wise for numerical problems. In some cases, the assumed constant values may vary and there may be some difference in the candidate’s answers and model answer. 6) In case of some questions credit may be given by judgment on part of examiner of relevant answer based on candidate’s understanding. 7) For programming language papers, credit may be given to any other program based on equivalent concept. 8) As per the policy decision of Maharashtra State Government, teaching in English/Marathi and Bilingual (English + Marathi) medium is introduced at first year of AICTE diploma Programme from academic year 2021-2022. Hence if the students write answers in Marathi or bilingual language (English +Marathi), the Examiner shall consider the same and assess the answer based on matching of concepts with model answer. Q. No. Sub Q Answer Marking Scheme Question 1 Attempt Any Five 10 Marks 1 a) Ans: Define Power Plant A power plant is an industrial facility that generates electricity by converting various forms of energy such as chemical, nuclear, solar, or kinetic energy into electrical energy. 02 marks for definition 1 b) Ans: Name any two high pressure boiler 1. Benson Boiler 2. Loffler Boiler 3. Lamont Boiler 4. Velox Boiler 5. LaMont Boiler Any two 01 mark each 1 c) Ans: Mention the steps involved in coal handling 1. Unloading 6. Weighing 2. Storage 7. Conveying 3. Reclaiming 8. Combustion 4. Crushing 9. Ash handling 5. Screening 10. Environmental Controls Any four 1⁄2 mark each 1 d) Ans: Define Waste Heat Recovery. Waste Heat Recovery can be defined as ,”the process of collecting the heat created as an undesired byproduct of a process or operation of an equipment or machinery, so that it can be used fulfill energy requirements of some other processes.” OR Waste heat recovery” is the process of “heat integration”, that is, reusing heat energy that would otherwise be disposed of or simply released into the atmosphere 02 marks for definition 22566 XXXXX

MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION (Autonomous) (ISO/IEC - 27001 - 2013 Certified) 3/12 | Page Q. No. Sub Q Answer Marking Scheme 2) b) Continue... 02 marks for labeled diagram 2) c) Ans: Draw labeled diagram of closed cycle gas turbine with heat exchanger 03 marks for neat sketch & 01 marks for labeling 2) d) Ans: Compare Co-generation & Tri-generation (Any four points) Co-generation Tri-generation 1. It produces Electricity as well as Heat. It produces Electricity, heat as well as Cooling 2. Less Complex More complex 3. Overall efficiency less Overall efficiency higher 4. Utilized for heating purposes, such as space heating, water heating, or industrial processes. Commonly used in buildings or industrial processes where there is a simultaneous need for electricity, heating, and cooling. 5. Lower capital costs and simpler maintenance compared to tri-generation. Higher capital costs and more complex maintenance Any four points 01 mark each