ENGT5261 - Modelling Techniques in Realistic Building Energy Simulation - Thermal Airflow - Engineering Assignment Help

Assignment Task :

Learning Outcomes: (ENGT5261)
1. Use understanding of building physics, and apply modelling techniques in realistic building energy simulation exercises.
2. Students will be able to critically evaluate energy, thermal, airflow, solar and daylighting simulation results and use them to make coherent recommendations.
3. Write technical reports on climatic and building analysis in a form suitable for clients to a high standard.

How the work will be marked:
• To achieve a ‘Distinction’ mark of 90 - 100%, the work must demonstrate an exceptional ability and insight, indicating the highest level of technical competence. It must have the potential to influence the forefront of the subject, it may be of publishable quality and it must demonstrate relevant generic skills at the highest
possible standard.
• To achieve a ‘Distinction’ mark of 80 - 89%, the work must demonstrate an outstanding ability and insight based on authoritative subject knowledge and a very high level of technical competence. It must be considered to be close to the forefront
of the subject, it may be close to publishable quality and it must demonstrate relevant generic skills at a very high level.
• To achieve a ‘Distinction’ mark of 70 - 79%, the work must demonstrate authoritative, current subject knowledge and a high level of technical competence. It must be accurate and extensively supported by appropriate evidence, it may show some
originality with clear evidence of capacity to reflect critically and deal with ambiguity in the data, and it must demonstrate relevant generic skills at a high level.
• To achieve a ‘Merit ‘ mark of 60 - 69%, the work must demonstrate a sound, current subject knowledge it must contain no significant errors in the application of concepts or appropriate techniques but it may contain some minor flaws. It must be well
developed and coherent, it may show some originality and clear evidence of capacity to reflect critically and it must demonstrate relevant generic skills at a good level.
• To achieve a ‘Pass’ mark of 50 - 59%, the work demonstrates satisfactory subject knowledge, with some evident weaknesses; possibly shown by conceptual gaps, or limited use of appropriate techniques. The work is generally sound but tends toward
the factual or derivative, with limited evidence of capacity to reflect critically. The work must demonstrate relevant generic skills at a satisfactory level.
• A ‘Fail’ a mark of 40 - 49% indicates that the work demonstrates limited core subject knowledge and contains some important weaknesses; possibly shown by factual errors, conceptual gaps, or limited use of appropriate techniques. The worksound development; it provides little evidence of capacity to reflect critically and demonstrates a quality of the relevant generic skills that do not meet the requirements of the task.
• A ‘Fail’ a mark of <30 indicates that the work demonstrates inadequate subject knowledge. It lacks coherence and evidence of capacity to reflect critically and demonstrates a quality of relevant generic skills that do not meet the requirements of the task.

Assignment brief
In this assignment you are required to use IES to model the thermal and energy performance of a multi-storey office building.
 

Outline
You have been commissioned by the project manager responsible for the development of a smalloffice building to be built in Ankara, Turkey. Your role is to assess the thermal performance and energy performance of the proposed concept design. The client wishes to minimise energy consumption whilst maintaining a comfortable indoor environment. The architect has therefore proposed a naturally ventilated building in an attempt to avoid the use of air conditioning. However, doubt has been expressed about the suitability of this approach to deliver adequate performance. You have therefore been commissioned to carry out an initial assessment based on an assumption that natural ventilation without mechanical cooling can provide adequate ventilation for at least most of the year (a detailed assessment of natural ventilation and daylight performance will be the subject of a separate study).
 

Tasks  (ENGT5261)
1. Construct the building geometry as shown in Appendix A below using IES ModelIT.
2. Implement a simple fixed rate ventilation strategy based on the natural ventilation rates recommended in CIBSE Guide A (CIBSE 2016).
3. Implement an appropriate heating (and if necessary cooling) strategy to ensure that comfortable indoor conditions are maintained during working hours. Use the heating set-point given below (and include an appropriate cooling set-point if necessary).
4. Include sources of internal gain as listed below.
5. Carry out a dynamic thermal simulation over a typical year using appropriate local weather data.
6. Carry out an evaluation of the thermal comfort and indoor air quality predicted in the occupied spaces and the overall energy consumption of the building.
a. Determine if the predicted dry-resultant temperature in each occupied room exceeds the maximum recommended temperature for offices given in CIBSE Guide A (CIBSE 2016),
b. Determine if the predicted indoor air quality in each occupied room meets the IDA2 standard given in CIBSE Guide A (CIBSE 2016), section 4.2.1 and section 4.2.3.
c. Compare the predicted energy consumption with good practice benchmarks given in CIBSE Guide F (CIBSE 2012),
7. Write a technical report documenting your findings and making recommendations for improvements to the building design. These could include recommendations for changes to the building

Other Information
Local planning regulations limit the height of building developments in this location to 15m. Assume the building is to be heated, with a heating set-point of 21°C, from 1st January to 30th April, and from 1st October to 31st December, during occupied hours. Occupancy densities are 1 person per 10m2 on the ground and first floor and 1 person per 5m2 on the second floor. Occupants are present from 8am until 6pm with 20% occupancy for the first hour, the last hour and the period midday until 2pm, Monday to Friday. At all other times, you should assume that the building is unoccupied. The lobby areas and stairwell are transition spaces and should be
modelled as unoccupied. Assume each person is using a personal computer and there is a printer for every 15 people. You
should also account for lighting gains of 8W/m2 on all floors. No other internal heat gains are present. Details of heat gains from computers and people can be found in CIBSE Guide A (CIBSE 2016). Assume that there are similar height buildings on the east and west sides of the building, that there is a large enclosed car park area on the north side of the building and that there is a large open space on the south side of the building.
 

Other locations
You are welcome to use a building location, modelling assumptions and assessment criteria applicable to your home country, provided that you clearly state what assumptions and assessmentcriteria you are using and that you reference the source of those assumptions and assessment criteria. If you choose to do so you should use a corresponding weather file when conducting the simulations.
 

Deliverables
Your submission should comprise a document in the style of a Consultancy Report to a Client. Please read the document ‘Assignment writing, advice and guidance’, located in the Assignments section on Blackboard, before writing your report.
The report should contain the following sections: -

• Front cover, which should include:
• Project title
• Author
• The issue date
• Confidentiality statement
• Executive summary

A few paragraphs summarising the work carried out and the major findings, in a style suitable for a non-technical reader.
 

Introduction

• A brief description of the building, its usage and the work carried out.
• A statement describing which modelling techniques were employed and why.

Statement of all the assumptions you made when building the computer model. Including:

• Building construction – the makeup of the building elements and their overall U-Values.
• Internal gains – people, computers and lights, etc.
• Building occupancy – when people are present.
• Environmental conditions (weather data used).

Results, which should include:

• A table of results from task 5 parts (a) and (b) and a statement regarding the predicted building performance in relation to performance criteria.
• A statement detailing the predicted annual energy consumption and how this compares to UK energy benchmarks

Conclusions and Recommendations, which should include:

• Conclusion that may be drawn from the results.
• Recommendations to the client for improving the design of this building to reduce energy consumption whilst maintaining indoor environmental quality.

Reference any documents used.
 

State the version of the software used.
 

Please read your report carefully before submitting it!
Remember that the reader may not be familiar with IES, with its component modules or with any default values it may use. You should therefore write your report using generic terms wherever possible and list all assumptions and model input values clearly, to an appropriate level of detail, rather than simply stating that default values were used.
You should consider the use of appendices where appropriate. All tables and figures should be numbered and labelled. Tables, figures and appendices should be referenced within the text of the report.
The length of your report should be no more than 1500 words, excluding appendices and references, etc. The word limit of 1500 words is for guidance only and applies to the main text of the report. However, a consultancy report should be written in a clear and concise manner. Therefore, whilst you will not lose marks for exceeding the word limit, you may lose marks if the report is not clear and concise. Please note that different policies may apply to assignments for other module

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