ENGT5261 - Building Performance Modelling - De Montfort University

Assessment of an office building

Learning outcome 1: Use understanding of building physics, and apply modelling techniques in realistic building energy simulation exercises.

Learning outcome 2: Students will be able to critically evaluate energy, thermal, airflow, solar and daylighting simulation results and use them to make coherent recommendations.

Learning outcome 3: Write technical reports on climatic and building analysis in a form suitable for clients to a high standard.

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 small office 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

Part 1. Construct the building geometry as shown in Appendix A below using IES Model IT.

Part 2. Implement a simple fixed rate ventilation strategy based on the natural ventilation rates recommended in CIBSE Guide A (CIBSE 2016).

Part 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).

Part 4. Include sources of internal gain as listed below.

Part 5. Carry out a dynamic thermal simulation over a typical year using appropriate local weather data.

Part 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), Table 1.5.
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), Table 20.1

Part 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 layout.

Attachment:- Building Performance Modelling.rar