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Design of Thermal System (MECH 0009

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Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP ` IN SEMESTER (INDIVIDUAL) ASSIGNMENT 2 Module Code: MECH 0009.1 Module Name: Design of Thermal System Level: 2 Max. Marks: 100 Instructions to Student ? ? ? ? ? Answer all questions. Deadline of submission: 06 June 2021 23:59 The marks received on the assignment will be scaled down to the actual weightage of the assignment which is 50% marks Formative feedback on the complete assignment draft will be provided if the draft is submitted at least 10 days before the final submission date. Feedback after final evaluation will be provided by 20 June 2021 Module Learning Outcomes The following LOs are achieved by the student by completing the assignment successfully 1. Apply a logical design methodology to the solution of a thermal systems design problem and apply cost estimation techniques. 2. Use an understanding of psychometrics and its application in HVAC engineering and design to practice or observe psychrometric measurements 3. Apply understanding of thermodynamics and fluid mechanics in the design, engineering and operation of refrigeration and cooling systems as well as efficient piping and duct systems design and associated room air distribution systems flow machines and control systems Assignment Objective The objective of this assignment is to assess students’ learning on the LOs mentioned in the above section. Q1. A 2-shell pass heat exchanger is designed to heat water flowing at X* kg/s in 12-tube pass with ethylene glycol as shown in Figure Q1. The inlet and outlet temperature values of water and MEC_AMO_TEM_035_02 Page 1 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP ethylene are given with the figure. The overall inside heat transfer coefficient of the tube is 280 W/m2 °C. By considering the necessary assumptions and stating them, determine (a) the rate of heat transfer, and (10 marks) (b) the heat transfer area of tube surface. (10 marks) Total: (20 marks) Consider: The cepecific heat capacity of water, Cp = 4180 J/kg . °C The cepecific heat capacity of ethylene glycol, Cp = 2680 J/kg . °C. Figure Q1. Note: For your input data of mass flow rate use the value given in your respective last ID Number in Table Q1. Last ID. Number Mass flow rate (kg/s) 0 1 2 Table Q1. 3 4 0.8 0.9 1 1.1 1.2 5 6 7 8 9 1.3 1.4 1.5 1.6 1.7 Q2. A counter-flow consentric pipe heat exchanger is designed to cool ethylene glycol (Cp = 2560 J/kg.°C) from 80°C to 40°C flowing with mass flowrate of 3.5 kg/s by using water (Cp = 4180 MEC_AMO_TEM_035_02 Page 2 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP J/kg.°C) (Figure Q2). The water enters to the heat exchanger at 20°C and leaves at 55°C. If the overall heat transfer is 250 W/m2 . °C, by considering and stating the necessary assumptio ns determine, (a) the rate of heat transfer, (8 marks) (b) the mass flow rate of water, (5 marks) (c) the heat transfer surface area of the inner side of the tube. (7 marks) (d) Considering the effect of fouling during operation through time and the heat transfer resistance would be affected, discuss the design and operation considerations to minimize the fouling problem on the opertion of the heat exchanger during design and operation stages. Discuss also cost and performance optimization considerations when one tries to consider the design and operation measures to be taken in order to minimize the effect of fouling. (10 marks) Total: (30 marks) Properties: The specific heats of water and ethylene glycol are given to be 4.18 and 2.56 kJ/kg.°C, respectively. Figure Q2. Q3. In heat exchanger design there is no unique solution that one can followed in the design process as the process is complex and multidisciplinary. Discuss the major heat exchanger design problems, variables to be considered and the steps of sizing the heat exchanger. MEC_AMO_TEM_035_02 (10 marks) Page 3 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP Q4. Demonstration and analysis of the air conditioning process using Air Conditioning Trainer EC1501. The data given below in Table Q4 is collected in a model that is used to demonstrate the air cooling and dehumidifying process using a psychrometric chart. The video for the experimental set-up of the Air Conditioning Trainer EC1501 is given in the link below. https://www.youtube.com/watch?v=e3zxGMG-cI8 Table Q4a. Experiment Data Experiment Case Parameter Symbol Compressor OFF Compressor ON Inlet (1) Outlet (2) Inlet (1) Outlet (2) Dry-bulb Temperature (°C) TA(1 or 2) 22.5 22.5 22.6 15.5 Relative humidity (%) Φ(1 or 2) 34.7 34.8 33.8 53.9 Wet-bulb temperature (°C) TW Dew-point temperature (°C) TD Humidity ratio (kg/kg) ω Enthalpy (kJ/kg) hA Table Q4b. Experiment Data Difference Between Inlet and Outlet Dry bulb temperature MEC_AMO_TEM_035_02 Symbol Compressor OFF Compressor ON ?TA (°C) Page 4 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP Relative humidity ?φ (%) Humidity ratio ?ω (kg/kg) Enthalpy ?hA (kJ/kg) Results Analysis (a) Complete Table Q4a & Q4b and compare the changes of all the properties of the moist air both with the compressor on and off using the psychrometric chart and formulas (16), (17), (18) and (19) given in the Appendix 1. (5 marks) (b) Discuss the changes in relative humidity and absolute humidity of the air when the compressor is on. If significant variation is observed between the relative humidity and absolute humidity changes, discuss the reason. (10 marks) (c) Create a line that connects the inlet air (point 1) and the outlet air (point 2) state points on the psychrometric chart and suggest why there are differences. (5 marks) (d) Verify if a dehumidifying process is occurring simultaneously with a cooling process using formula (19) if Tsat-evaporating =10°C. (10 marks) (e) Discuss your results of dry-bulb temperature, relative humidity, wet-bulb temperature, dew-point temperature, humidity ratio and enthalpy you obtained when the compressor is off and on. (10 marks) Total: (40 marks) MEC_AMO_TEM_035_02 Page 5 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP Rules & Regulations: ? ? ? ? All resources should be cited using CU Harvard style. The final assignment must have a Title page, Table of Contents, References/ bibliography using CU Harvard Style and page numbers. Title Page must have Assignment Name, Module name, Session, your name, ID, and the name of the faculty. Softcopy in word format is to be submitted through Turnitin link on Moodle. Guidelines: ? Assignment must be computer typed. ? Font - Times New Roman ? Font – Style - Regular ? Font - Size - 12 ? Heading should be with Font Size 14, Bold, Capital and Underline. ? Explain with suitable diagrams wherever required. Diagrams must be drawn using suitable CAD software. Each student has to do the assignment individually. You can refer books in E-Library or use internet resource. But you should not cut and paste material from internet nor provide photocopied material from books. The assignment answers should be in your own words after understanding the matter from the above resources. ? ? MEC_AMO_TEM_035_02 Page 6 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP Appendix 1 MEC_AMO_TEM_035_02 Page 7 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP (TQ 2015) MEC_AMO_TEM_035_02 Page 8 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP Appendix 2 Assessment Evaluation Criteria Classification And % Range Outstanding 91-100 Excellent 81--90 Very Good Quality 71-80 Good (Acceptable) 61-70 Reflection and critical analysis. Highly competent analytical skills and reflective practice, demonstrating personal 51-60 (all learning outcomes not adequately met) 0-50 Accurate referencing and bibliography correctly using appropriate referencing style Presentation, Grammar and Spelling Excellent presentation, logically structured, using correct grammar and spelling, excellent cross- where applicable workplace strategies, policies and procedures. Excellent knowledge and understanding of principles and concepts and /or excellent knowledge and understanding of the application of theory in practice Evidence of reading a wide range of educational literature/research and where applicable, workplace strategies, policies and procedures. Appropriate referencing and bibliography correctly using appropriate referencing style Good presentation, competently structured, using correct grammar and spelling, clear and easy to use links to supporting evidence Good knowledge or key Evidence of reading a good Generally well referenced Reasonable and reflective practice demonstrating personal learning and growth, insight into required professional values, principles and competencies and professional development planning. principles and concepts and/or good knowledge of the application of theory in practice range of educational literature/research and where applicable workplace strategies, policies and procedures. with correct use of the appropriate referencing style completely structured, acceptable grammar and spelling, acceptable links to supporting evidence Acceptable use of analytical skills and reflective practice demonstrating personal learning and growth, insight into required professional values, Acceptable knowledge of key principles and concepts and/or knowledge of the application of theory in practice Evidence of reading an appropriate range of educational literature/research and where applicable, relevant workplace policies and Adequate referencing. Generally accurate use of appropriate referencing style Adequate presentation and structure, acceptable grammar and spelling, adequate links to supporting evidence Adequate Appropriate referencing. referencing Weak presentation , satisfactory structure, demonstrating learning and insight into professional personal growth, required values, demonstrating personal learning and growth, insight into required competencies and/or professional development planning. Professional values and principles not reflected in the submission. and/or Insufficient/no use of analytical skills and reflective demonstrating learning and MEC_AMO_TEM_035_02 Evidence of reading an extensive range of educational literature/research and Referencing and Bibliography application of theory in practice. principles and competencies and professional development planning. Little use of analytical skills and reflective practice Weak /Poor Evidence of Reading learning and growth, insight into required professional values and principles and professional development planning. Strong analytical skills and reflective practice used, demonstrating personal learning and growth, insight into required professional values, principles and competencies and professional development planning. Good use of analytical skills principles and competencies and professional development planning. Adequate use of analytical skills and reflective practice Adequate/ Satisfactory Knowledge and Understanding/ Application of Theory Extensive knowledge and depth of understanding of principles and concepts and /or outstanding referencing and links to supporting evidence presentation, procedures Adequate knowledge of key principles and concepts Evidence reading of minimal of educational and/or satisfactory evidence of the application of theory in practice. literature/research and where applicable relevant workplace policies and procedures style used but may contain some inaccuracies. grammar and spelling, links to supporting evidence Little evidence of knowledge of key Little or no evidence of reading outside of the Little or no referencing, incorrect style, or very Poor presentation, grammar and spelling, links principles or concepts and/or little evidence of the application of theory in practice course textbook and/or reference to relevant work place policies and procedures inaccurate use of appropriate referencing style to supporting evidence and/or and/or No evidence of knowledge No evidence of reading of key principles or concepts and/or no evidence of application of theory in practice outside of the course textbook and/or reference to relevant workplace policies and procedures and/or Unacceptable presentation, grammar and spelling, structure is very poor, links to supporting evidence practice personal growth, Page 9 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP insight into required competencies and professional development planning Important Policies to be followed 1. Student Academic Integrity Policy*: ? MEC upholds the spirit of academic integrity in all forms of academic work and any form of violation of academic integrity shall invite severe penalty. Any benefit obtained by indulging in the act of violation of academic integrity shall be cancelled. ? MEC also reserves the right to notify the appropriate law enforcement authorities of any unlawful activity and to cooperate thereafter in any investigation of such activity. ? Faculty can conduct a viva to investigate and ascertain that the work submitted is student’s own work as per the guidelines for the same. A student can be given a maximum of 2 chances to attend the viva in such cases. It is expected that the student attends the viva during the first chance itself unless due to extenuating circumstances. If the student does not attend the viva in spite of being given 2 chances and fails to submit valid reasons, he/she will be awarded a fail in the module and this shall be counted as a case of academic integrity violation. All cases of violation of academic integrity on the part of the student shall fall under any of the below mentioned categories: 1. Plagiarism 2. Malpractice 3. Ghost Writing 4. Collusion 5. Other cases If the student fails a module and has a proven case of academic integrity violation in this module, the student is required to re-register the module. This is applicable to first and second offence of academic integrity violation of plagiarism type a. First Offence of Academic Integrity Violation: i. Plagiarism a. If a student is caught first time in an act of academic integrity violation during his/her course of study in any assignment other than project work and if the type MEC_AMO_TEM_035_02 Page 10 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP of violation is plagiarism, then the student will be allowed to re -submit the assignment once as per the period allowed for re submission However, a penalty of deduction of 25% of the marks obtained for the resubmitted work will be imposed. b. Period of re-submission: The student will have to re-submit the work within one week (5 working days) from the date he or she is advised to re -submit. c. Re-submission of the work beyond the allowed period of resubmission will not be accepted and the assessment will be awarded a zero mark. d. If the re-submitted work (within the allowed period of resubmission) is also found to be plagiarized, then that assessment component will be awarded a zero mark. It shall also contribute to the total count of academic integrity vi olation for that student. e. If plagiarism is detected in UG Project work (Project 1, Project Planning and Project Design and Implementation), the above clauses do not apply, and the work will be summarily rejected. In these cases the student will be awarded a fail (F) grade and is required to reregister the module . ii. b. Malpractice / Ghostwriting / Collusion If a student is caught first time in an act academic integrity violation during his/her course of study for an assessment component irrespective of course work or end semester and if the type of violation is Malpractice/Ghostwriting/Collusion, then the student shall fail the module. Second Offence of Academic Integrity Violation: i. Plagiarism a. If any student is caught second time in an act of academic integrity violation during his/her course of study and if the type of violation is plagiarism, then the student will not be allowed to resubmit the work, and s/he will directly be awarded zero for the work in which plagiarism is detected. b. ii. The student shall also receive a warning of suspension in such cases. Malpractice/Ghostwriting/Collusion a. If a student is caught a second time in an act academic integrity violation for an assessment component irrespective of coursework or end semester and if the type of violation is Malpractice/Ghostwriting/Collusion, then the student shall fail the module. MEC_AMO_TEM_035_02 Page 11 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP b. c. The student shall also receive a warning of suspension in such cases. Third Offence of Academic Integrity Violation: a. b. c. d. If a student is caught a third time in an act of academic integrity violation for an assessment component irrespective of coursework or end semester then the student shall fail the module and also shall be suspended for one semester from the College, once the academic integrity violation case is confirmed by Institutional Assessment Review Committee. The student shall be suspended for the immediate subsequent semester and can register for modules only after having served the suspension period fully. This is also applicable for semesters offered in block mode. During the suspension period, the student shall have to mandatorily complete a course on academic integrity/writing before s/he can register for any modules. During the period of suspension, the student shall be allowed to attempt supplementary examinations if s/he is eligible for the same. S/he shall also be allowed access to all college facilities permitted for a regular student except for registering the modules. d. Fourth Offence of Academic Integrity Violation: a. e. f. If a student is caught a fourth time in an act of academic integrity violation for an assessment component irrespective of coursework or end semester, the student shall fail the module and also shall be expelled from the College, once the case is confirmed by Institutional Assessment Review Committee. b. The student shall be expelled from the college and all access to the college facilities and premises shall cease to exist. The documents shall be released only after getting the NOC (No Objection Certificate) from Registration Office. c. `On termination, the student shall not be refunded any fees paid for the academic semester in which academic integrity violation was observed. Other cases If a student commits an act of academic integrity violation as per the definition of “other cases” mentioned in the previous section or of a different nature, student’s case shall be forwarded to an Institutional Assessment Review Committee, Chaired by the Associate Dean, Academic Affairs. The committee shall investigate the case by means of a viva and/or a hearing of the parties concerned if required and shall take appropriate decision. The penalty that can be granted to a proven case of academic integrity violation which falls in this category of “other cases” can be a warning/component zero/ module fail/suspension/expulsion depending on the nature and gravity of the offence. Types/Variations of cases of Plagiarism and associated actions Type 1: In case plagiarism is detected in any component or part submission (submitted at different times) of one assessment (assignment), the deduction in marks will be applicable for the whole assessment (assignment), even if only the component or part submission alone needs to be resubmitted. Type 2: In case plagiarism is detected in a group assessment, all students of the group will be considered as having committed an act of plagiarism irrespective of whether plagiarism is on MEC_AMO_TEM_035_02 Page 12 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP account of the act of all or a few or only one member. The policy will then be applied to all students. If some students in the group are eligible to re-submit (first offence) and others are not eligible, only eligible students will be allowed to re-submit within a period of one week and the penalty will be applied as per the policy for each student according to his / her history of violations. Type 3: Combination of Type 1 and Type 2: In case plagiarism is detected in any component or part submission (submitted at different times) of a group assessment (assignment), the deduction in marks will be applicable for the whole assessment (assignment), even if only the component or part submission alone needs to be resubmitted. All students of the group would be considered as having committed an act of plagiarism irrespective of whether plagiarism is on account of the act of all or a few or only one member. The policy will then be applied to all the students of the group. If some students in the group are eligible to re-submit (first offence) and others are not eligible, only eligible students will be allowed to re-submit within a period of one week and the penalty will be applied as per the policy for each student according to his / her history of violation. Type 4: Variation of Type 1 and Type 2: In cases where the assessment consists of components or part submissions that could be a group assessment component (e.g. group assignment) and an individual assessment component (e.g. individual reflection), the following will be applicable: a. If plagiarism is detected in the group assessment component, all students of the group will be considered as having committed an act of plagiarism, irrespective of whether plagiarism is on account of the act of all or a few or only one member. The policy will then be applied to all students of the group. In such cases the group assessment component will be resubmitted. If some students in the group are eligible to re-submit (first offence) and others are not eligible, only eligible students will be allowed to re-submit within a period of one week and the penalty will be applied for each student according to his / her history of violation. b. If plagiarism is detected in the individual assessment component, the individual assessment component will be resubmitted - if the student is eligible for resubmission-. The policy will then be applied to that student alone. c. In both cases (a) and/or (b), the deduction in marks will be applicable for the whole assessment (assignment). g. Types/Variation of Cases of Multiple Offences If student is caught with multiple violations of same or different nature in different modules of the same semester, they will be considered as one offence and student will be penalized for each violation according to the type of the offence. MEC_AMO_TEM_035_02 Page 13 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP If student is caught with multiple violations of same or different nature in the same module of the same semester, then they will be considered as different offences and each will contribute to the overall count of AIV. The student then shall be penalized for each violation according to the count and type of each offence. * For further details Refer to MEC Student Academic Integrity Policy in Student Handbook. 2. Late Submission Regulations: It is the students’ responsibility to check all relevant timelines related to assessments . As per the Assessment Policy at MEC, late submissions are allowed for one week (5 working days) for all UG modules with a penalty. In such cases, a deduction of 5% of the marks obtained for the submitted work shall be imposed for each working day following the last date of submission till the date of actual submission. Assessment documents submitted beyond a period of one week (5 working days) after the last date of submission will not be accepted and will be awarded a zero for that assessment. In cases where the submission has been delayed due to extenuating circumstances, the student may be permitted to submit the work without imposing the late submission policy stated above. The extended period of submission will be one week from the original last date of submission. In such cases, the student is expected to submit the su pporting certificates on or before the original last date of submission of the assessment and the decision of extension rests with faculty responsible for the assessment .The late submission policy shall be applied if the student fails to submit the work within one week of the original last date of submission. Students may contact their teachers for clarification on specific details of the submission time if required. 3. Research Ethics and Biosafety Policy To protect and respect the rights, dignity, health, safety, and privacy of research subjects involved including the welfare of animals and the integrity of environment, all student projects are expected to be undertaken as per the MEC Research Ethics and Biosafety Policy. Accordingly the following shall apply. ? Research and other enterprise activities shall be conducted by maintaining the high ethical standards consistent with national and international standards and conventions. ? Any research at MEC that is categorized as high-risk research shall be subject to review and approval by the Research Ethics and Biosafety Committee. ? Research activities involving collection of human or animal tissues and manipulation of microbial, animal or plant cells shall be subject to review and approval by the Research Ethics and Biosafety Committee. MEC_AMO_TEM_035_02 Page 14 of 15 Design of Thermal System (MECH 0009.1) – Spring-2021 –Assignment 2 – QP ? Participants involved in research must be informed about the purpose of research and intended uses of research findings. Written consent must be obtained from people involved prior to the commencement of research. ? Data obtained from participants must be treated with high confidence and should be used only for the intended purpose of research. MEC_AMO_TEM_035_02 Page 15 of 15