GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions

EXAMINATION PAPER: ACADEMIC SESSION 2020/2021

University of Greenwich

Campus Medway

Faculty Engineering & Science

Level 7

Exam Session April/May 2021

MODULE CODE GEEN 1121

MODULE TITLE Advanced Thermo-fluidApplicationExamType Online Exam

Exam Duration 2 hours

Instructions to Candidates

AnswerAllQuestionsinPartA.AnswerOne QuestioninPartBAll questions carry equal marks. Calculators may be used.

A formula sheet is appended.

Students will be required to achieve an overall grade of 50% to achieve a pass grade

PARTA

Q1

  1. In a heat transfer relation 𝑄̇ = 𝑈𝐴𝑠𝜃𝑚for heat exchanger, what is

𝜃𝑚called? How is it calculated for parallel-flow and counter-flow heat exchanger?

[5 marks]

  1. List five of the common approximations made in the analysis of heat exchangers.

[5 marks]

  1. An exhaust pipe of 75 mm outside diameter is cooled by surrounding it by an annular space containing water in a parallel flow arrangement. The exhaust gas enters the exhaust pipe at 350oC, and the water enters from the mains at 10oC. The heat transfer coefficients for the gases and water may be taken as 0.3 and 1.5 kW/m2-K, and the pipe thickness may be negligible. The gasses are required to be cooled to 100oC and the mean specific heat capacity at constant pressure is 1.13 kJ/kg-K. The gas flow rate is 200 kg/h and the water flow rate is 1400 kg/h. Take specific heat capacity of water as 4.19 kJ/kg-K. For this system described
    1. Calculate the heat transfer.

[3 marks]

  1. Determine the overall heat transfer coefficient.

[3 marks]

  1. Calculate the required pipe length for parallel flow.

[5 marks]

  1. Calculate the required pipe length for counter flow.

[4 marks]

[Total marks: 25]

Q2

  1. What is the physical meaning of the vorticity, 𝜉, in fluid flows? How you would work it out if the velocity field, 𝑉, is known?

[4 marks]

  1. An ideal fluid flows between the inclined walls of a two-dimensional channel into a line sink located at the origin, as shown in Figure Q2. The velocity potential for this flow field is given by the expression ∅ =

𝑚 𝐿𝑛(𝑟), where 𝑚 is a constant.

  1. Find expressions for the radial (𝑣𝑟) and tangential ((𝑣𝜃) velocity components.

[4 marks]

  1. Determine the corresponding stream function. Note that the value

of the stream function along the 𝑂𝐴 (i.e

𝜃 =

𝜋) 3

is zero.

[12 marks]

  1. Find the value of the constant 𝑚 if the value of the stream function at point 𝐵 located at (𝑥 = 1 , 𝑦 = 4) is 𝜓𝐵 = −0.71.

[5 marks]

[Total: 25 marks]

Figure Q2

Q3

(a) A vapour compression refrigeration plant using R134a operates with a compression suction pressure of 2 bar and a temperature and -10.09oC. The condenser pressure is 8 bar and there is no undercooling of the condensate. Compression takes place in two stages, and the condensate is throttled into a flash chamber at 4 bar from which dry saturated vapour is drawn to mix with the refrigerant from the Low- pressure (LP) compressor before entering into the High-pressure (HP)

compressor. The liquid from the flash chamber is throttled into the evaporator. If each compressor operates isentropically and the refrigerant capacity is 10 tons.

  1. Show the block diagram and the corresponding Temperature- entropy (T-s) diagram.

[6 marks]

  1. Find the enthalpy at each point in the cycle.

[8 marks]

  1. Determine the mass flow of the refrigerant for the lower and upper cycle.

[6 marks]

  1. Calculate the power input to each compressor.

[3 marks]

  1. Determine the coefficient of performance (COP) of the plant.

[2 marks]

[Total: 25 marks]

END of PART A

PARTB

Q4

NB:thisishalfthermoquestionandhalffromfluidaswehave5questiononly.

  1. When is a heat exchanger classified as being compact?

[2 marks]

  1. Do you think a double-pipe heat exchanger can be classified as a compact heat exchanger?

[2 marks]

  1. How does a cross-flow heat exchanger differs from a counter-flow one?

[2 marks]

  1. What is the difference between mixed and unmixed fluids in cross- flow?

[1 marks]

  1. What is the role of the baffles in a shell-and-tube heat exchanger? How does the presence of baffles affect the heat transfer and the pumping power requirements? Explain.

[5 marks]

  1. Give a critical appraisal of the HAWT and VAWT technologies and considering recent advancements in control systems and constructions materials present, with justification, whether or not, for some applications, the VAWT technology is likely to be as successful as the HAWT.

[13 marks]

[Total: 25 marks]

Q5

  1. Consider an ideal Assume a Horizontal Axis Wind Turbine (HAWT) having an infinite number of blades for the rotor to be considered an actuator. Also assume the air to be homogeneous, steady, non- compressible and with a non-rotating wake.

Show that the velocity, 𝒖, at the rotor is the average of the upstream velocity 𝑼𝒐 and the downstream velocity 𝒖𝟏. You can apply Bernoulli’s equation to the regions upstream and downstream of the rotor to obtain the thrust on the rotor and combine with the rate of change of axial momentum of the wind through the rotor.

[12 marks]

  1. Calculate the axial wind velocity 𝒖 at the rotor if the upstream wind velocity is 𝑼𝒐 = 𝟏𝟐𝒎𝒔−𝟏 and the axial induction factor is 𝒂 = 𝟎. 𝟐𝟏.

[4 marks]

  1. Calculate the wind velocity 𝒖𝟏 far downstream of the rotor when the pressure is restored to the level of the upstream pressure 𝑷𝒐.

[6 marks]

  1. Calculate the thrust on the rotor if the blades have a span of 𝟔𝒎. Take the air density 𝝆 = 𝟏. 𝟐𝒌𝒈𝒎−𝟑 and neglect the diameter of the hub.

[3 marks]

[Total: 25 marks]

END OF PART B END OF PAPER

FormulaSheet

Conditions for irrotational flow:

𝜕𝑤

𝜕𝑦

𝜕𝑣

= ,

𝜕𝑧

𝜕𝑢

𝜕𝑧

𝜕𝑤

=

𝜕𝑥

𝑎𝑛𝑑

𝜕𝑣

𝜕𝑥

𝜕𝑢

=

𝜕𝑦

Continuity equation:

𝜕𝑢 𝜕𝑣 𝜕𝑤

+ + = 0

𝜕𝑥 𝜕𝑦 𝜕𝑧

1 𝜕𝑤 𝜕𝑣 1

Rotation in a fluid: 𝜔 = ( − ) 𝑖̂ +

𝜕𝑢 𝜕𝑤 1 𝜕𝑣 𝜕𝑢

̂ ( ) 𝑗̂ + ( − )𝑘

2 𝜕𝑦

𝜕𝑧

2 𝜕𝑧

𝜕𝑥

2 𝜕𝑥

𝜕𝑦

Shear strain in a fluid:

𝑟𝑥𝑦 =

1 𝜕𝑣 [

2 𝜕𝑥

𝜕𝑢

+

𝜕𝑦

] , 𝑟𝑦𝑧 =

1 𝜕𝑣 [

2 𝜕𝑧

𝜕𝑤

+

𝜕𝑦

] , 𝑟𝑥𝑧 =

1 𝜕𝑢 [

2 𝜕𝑧

𝜕𝑤

+ ]

𝜕𝑥

Axial induction factor

𝑈𝑜 − 𝑢

𝑎 =

𝑈𝑜

Wind velocity far downstream a wind turbine’s rotor:

𝑢1 = 𝑈𝑜(1 − 2𝑎)

Elementary flow rate per unit length

𝑑𝑞 = 𝑢𝑑𝑥

Definition of stream function

1 𝜕𝜓

𝜕∅

𝜕𝜓

1 𝜕∅

𝑣𝑟 = 𝑟 𝜕𝜃 = 𝜕𝑟 𝑎𝑛𝑑 𝑣𝜃 = − 𝜕𝑟 = 𝑟 𝜕𝜃

Definition of velocity potential

𝑢 =

𝜕𝜙

𝜕𝑥

𝑎𝑛𝑑 𝑣 = −

𝜕𝜙

𝜕𝑦

Bernoulli’s equation

𝑃 +

1

𝜌𝑢2

2

= 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡

Thrust on a rotor.

𝑇 = 𝑚̇ (𝑈0 − 𝑢1)

𝑚̇ = 𝜌𝑢𝐴

𝑟 = 𝑥2 + 𝑦2

𝜃 = tan−1(𝑦)

𝑥

Struggling with GEEN 1121 Advanced Thermo-fluid Application exam? check out our professional assignment help. 24X7 support, Order now.

Universal Assignment (October 2, 2022) GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions. Retrieved from https://universalassignment.com/geen-1121-advanced-thermo-fluid-application-2020-21-questions/.
"GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions." Universal Assignment - October 2, 2022, https://universalassignment.com/geen-1121-advanced-thermo-fluid-application-2020-21-questions/
Universal Assignment May 1, 2022 GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions., viewed October 2, 2022,<https://universalassignment.com/geen-1121-advanced-thermo-fluid-application-2020-21-questions/>
Universal Assignment - GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions. [Internet]. [Accessed October 2, 2022]. Available from: https://universalassignment.com/geen-1121-advanced-thermo-fluid-application-2020-21-questions/
"GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions." Universal Assignment - Accessed October 2, 2022. https://universalassignment.com/geen-1121-advanced-thermo-fluid-application-2020-21-questions/
"GEEN 1121 Advanced Thermo-fluid Application 2020/21 Questions." Universal Assignment [Online]. Available: https://universalassignment.com/geen-1121-advanced-thermo-fluid-application-2020-21-questions/. [Accessed: October 2, 2022]

Please note along with our service, we will provide you with the following deliverables:

Please do not hesitate to put forward any queries regarding the service provision.

We look forward to having you on board with us.

Get 45%* OFF on Assignment Help

Most Frequent Questions & Answers

Universal Assignment Services is the best place to get help in your all kind of assignment help. We have 172+ experts available, who can help you to get HD+ grades. We also provide Free Plag report, Free Revisions at a Pocket Friendly cost, We offer Best Price in the industry guaranteed.

We provide all kinds of assignmednt help, Report writing, Essay Writing, Dissertations, Thesis writing, Research Proposal, Research Report, Home work help, Question Answers help, Case studies, mathematical and Statistical tasks, Website development, Android application, Resume/CV writing, SOP(Statement of Purpose) Writing, Blog/Article, Poster making and so on.

We are available round the clock, 24X7, 365 days. You can appach us to our Whatsapp number +1 (613)778 8542 or email to info@universalassignment.com . We provide Free revision policy, if you need and revisions to be done on the task, we will do the same for you as soon as possible.

We provide services mainly to all major institutes and Universities in Australia, Canada, China, Malaysia, India, South Africa, New Zealand, Singapore, the United Arab Emirates, the United Kingdom, and the United States.

We provide lucrative discounts from 28% to 70% as per the wordcount, Technicality, Deadline and the number of your previous assignments done with us.

After your assignment request our team will check and update you the best suitable service for you alongwith the charges for the task. After confirmation and payment team will start the work and provide the task as per the deadline.

Yes, we will provide Plagirism free task and a free turnitin report along with the task without any extra cost.

No, if the main requirement is same, you don’t have to pay any additional amount. But it there is a additional requirement, then you have to pay the balance amount in order to get the revised solution.

The Fees are as minimum as $10 per page(1 page=250 words) and in case of a big task, we provide huge discounts.

We accept all the major Credit and Debit Cards for the payment. We do accept Paypal also.

Popular Assignments

Plant Production System Assignment Help

The Best Instant Academic Assistance Online Instant Plant Production System Assignment Help for Students Plant production system assignment help students help them understand the various theoretical and practical aspects of the subject. It is an intensive study of the scientific methods of plant production for an effective and economized production

Read More »

Integrated Science Assignment Help to Boost your Grades Immediately

Integrated Science Assignment Help for Students Integrated Science is taught from a high-school level. This consists of an investigative study of physics, chemistry, biology, forensic science, biotechnology, and geology. This is a course that introduces young students to the interconnectedness between all the scientific knowledge. Students require integrated science assignment

Read More »

Top Human Biology Assignment Help from Experts

Ask an Expert for top Human Biology Assignment Help Sometimes, expert guidance with Human Biology assignment help is all you need in order to boost your grades. Universal Assignment Help Service is a top-ranking student-help platform that offers a wide range of services for students. Students can order human biology

Read More »

Aviation Assignment Help from Experts

The Most Trusted Guidance for Students Aviation Assignment Help for All Challenging Problems Aviation assignment help online from the greatest experts can relieve student pressure to a great extent. It is well known that aviation is an extremely challenging stream, as it is, and students have to keep too many

Read More »

Growing demand for Assignment Help in Ireland

The number of multinational corporations choosing Ireland as their regional headquarters is increasing. So more and more students are choosing Ireland as an idle place to take their degrees. But studying in universities and keeping up the pace is not an easy task and getting good marks is not enough

Read More »

Board appraisal report

Weight: 40% Format: 2,000-word written report. Note: All written assessments should be submitted as Word files (.docx) (Word is available from your AIB Office 365 account) Summary Write a 2000-word Board Appraisal Report where you will evaluate an organisation’s corporate governance practices, board structure including committees and board diversity against

Read More »

49102: Traffic and Transportation

Assignment 2: Transport Modelling and Operations Due: 7 October 2022 This is an individual assignment Please answer the following questions and present your work in a report format clearly including your name and student ID on the cover page. Submit a PDF of your report into the Assignment Activity shown

Read More »

ENV3105 Hydrology Assignment 2

Assignment 2 Due date:       04 October 2022 Weighting:   25% (250 marks) 1. Overview This assessment is designed to test your achievement of selected learning objectives of Modules 6 to 9. In particular, the assignment involves estimation of urban design discharges, reservoir routing and water balance. It is intended to reinforce and

Read More »

Assessment 1: The Journal of Biological Chemistry

Guide abstract All cells within the body are bathed in a fluid. The composition of this fluid is tightly regulated to contain specific levels of various ions. Disruption in the balance of these ions can lead to cell death and damaging inflammation. However, standard surgical practice fails to consider these

Read More »

Project 2: Assignment on Scheme

Due: Oct 1, before midnight. This document first provides the aims of this project. It then lists the requirements as explicitly as possible. It then hints at how these requirements can be met. Finally, it describes how it can be submitted. Aims The aims of this project are as follows:

Read More »

Analysis of Rube Goldberg machine

Week 5 homework for tutorial  In week 4 we needed to also look at how many failures we could have to meet our six sigma level – we will also need to look at this for the times for each stage and total time. To effectively put the flame out

Read More »

PROCESS AND PHILOSOPHY OF ENGINEERING

ASSESSMENT BRIEF 3: Calculations Summary Title Calculations Due Date Monday the 3rd of October at 11:59 (NSW) AEST – End of Week 5 Length 1000-word (does not include equations, charts, graphs or tables) Weighting  35% Submission  WORD document submitted to Turnitin Unit Learning Outcomes  ULO 3: apply basic statistical analysis

Read More »

THT3114 Research Proposal

Mini Report Assignment 2 Executive Summary (100- 150 words) This is the summary of your research and thus needs to be completed after you have completed writing your research proposal. This is not counted towards the word count. Mention the key aspects of the research proposal. Separate paragraphs Area of

Read More »

LITERATURE REVIEW – DATA MINING TO RESEARCH PROPOSAL

ASSESSMENT TWO: LITERATURE REVIEW – DATA MINING TO RESEARCH PROPOSAL – DESIGN RESEARCH INSTRUMENT – PRESENTATION) Task Length: Mini Report (750 words) – Research Proposal) Presentation – Not more than 15 Slides –  (Templates Provided for both the mini report and presentation)  Duration of the Video Presentation – Not more

Read More »

Assignment on COVID-19 pandemic in the hospitality industry

Exploring the new health and safety innovative business practice to restore consumer confidence in the COVID-19 pandemic in the hospitality industry Task Length: Report – 2000 words (+-10%) Task Type Individual Due week and submission deadline Week 11 – SUNDAY – 02/10/2022 – 23:59 Value 40%   PART A: On

Read More »

Assignment Help in Israel

Leading assignments help in Israel Israel is known for its high-tech development, innovations, and entrepreneurship, and is home to the best start-ups in the world. Students from all over the world are drawn to this ecosystem of “innovation and development,” which is supported by a robust higher education system with

Read More »

Animal Production System Assignment Help

Animal Production System Assignment Help: Get 100% guaranteed Expert Assistance Immediately Where can you find the best Animal Production System Assignment Help Online?  Animal Production System assignment help online can boost student results while encouraging interest in the field. The hectic schedule of students, along with their burden of various

Read More »

Immediate Calculus Assignment Help from Top Experts

Immediate Calculus Assignment Help from Top Experts Calculus Assignment Help to Boost your Grades Students can now order instant Calculus assignment help on Universal Assignment Help Service in a fast and easy way. Calculus in taught at a slightly advanced stage of school, and can be an exciting subject in

Read More »

Mathematics Foundation Assignment Help

Effective Mathematics Foundation Assignment Help for Students: Order Expert Solutions Immediately Mathematics Foundation Assignment Help for Students Students often require mathematics foundation assignment help for clearing doubts, understanding the derivation of a formula or theorem, or getting urgent solutions to certain mathematical problems. Online mathematics foundation assignment help is extremely

Read More »

Mathematics Application Assignment Help

Top for Students: Order Expert Solutions Immediately for the Best Results Why do students need Mathematics Application Assignment Help? Mathematics Application assignment help can lead students to perform excellently in the subject in a convenient and relaxed way. Many students find it difficult to apply theoretical knowledge in large and

Read More »

The finest assignment helps in Saudi Arabia

Many students dream to study in Saudi Arabia as they offer some of the best facilities, and they boast one of the most spectacular and rapidly expanding higher education systems in the Middle East. So, this should be of no surprise that every year, many international students prefer to register

Read More »

Expert Solutions for the Best Arithmetic Assignment Help Online

Instant Arithmetic Assignment Help for Students Students most often require Arithmetic assignment help online to solve various calculations. Universal Assignment Help Service provides the best solutions to all arithmetic problems for each student. Students simply have to upload their assignment guidelines on their website, and a customized and accurate assignment

Read More »

Assignment help in Cameroon

The Necessity of Assignment help in Cameroon Today management degrees are one of the most prestigious degrees out there and gaining immense popularity, this degree has the most demand in the market as new startups are emerging day by day, and every company needs the best people to run their

Read More »

Assignment Help in South Korea

Difference between a Good vs Great Online Assignment Tutor The e-learning market is growing at a fast rate due to digitalization. This fact causes an increment in the demand for online tutors as students worldwide searches for a suitable solution for online assignment help in South Korea. You might hear

Read More »

Assignment Help in Japan

Outside-The-Classroom Learning Opportunities It is a typical thinking lesson that stands inside the four walls of a classroom. Some educators say the classroom is the abode of learning and knowledge. We cannot prove these statements wrong. However, one thing is certain: they are partially correct. Learning of concepts starts in

Read More »

Assignment Help in Brazil

Why do Students Consider Online Assignment Help in 2022? Academic life is full of ups and downs. Students who experience such a phase struggle to maintain the equilibrium between personal and professional life. It is because of the load of homework, exams, and participation in extracurricular activities. These events cause

Read More »

Assignment Help in Taiwan

What are the Necessities of Assignment Guidance for Students? As technology takes a new turn around, homework assignments become lengthy and complex. This academic work needs lots of core subject knowledge along with proper research to finish it with proper care. Such work is very time-consuming and hectic for the

Read More »

Assignment Help in Hong Kong

Can You Achieve High Academic Results? Every student wishes to get top scores in their exams. Yet it does not happen if you do not get the correct assignment help in Hong Kong from an online tutor. Such support is in the form of tips, advice, hacks, or taking guidance,

Read More »

VU22977 – Practice in a Legal Environment

Advanced Diploma of Legal Practice – 22565VIC PORTFOLIO- CLIENT MATTER FILE Assessment task 1 Prepare a comprehensive portfolio of documents to create a Client Matter File which must include: Element 1 Area of law Cover sheet stating client name and short description of legal matter Client Instruction Sheet, Costs Agreement

Read More »

KIT714 ICT Research Principles: Assignment 1

Practical Qualitative Research Exercise                                                                                                                                         Type:                 In-Semester, Individual Assignment Task Length:   minimum 2,000 words Weighting:     20% of total assessment for this unit Due Date:       Friday 5 August 2022 – 11:55 pm (Week05) Submission:    electronic submission on MyLO (WORD or PDF) Description:    This practical exercise will engage students in a qualitative research

Read More »

Can't Find Your Assignment?

Get Free Assignment

Open chat
1
Free Assistance
Universal Assignment
Hello 👋
How can we help you?