UBLMTB_30_2 Building Services Applications Coursework 1 Brief | UWE

Contents 

Introduction 

Questions A -Water Services and Drainage (35 marks) 
Questions B -Heating Systems (25 marks) 
Question C -Air Distribution System Design

Introduction

The Analysis and Calculation Report requires you to demonstrate that you can perform the analytic procedures introduced in lectures during the first semester. This includes the following subjects:

• Water Services and Drainage System Design
• Heating System Design
• Lighting Design 

The key aim of this coursework is to demonstrate your methodology and understanding of the techniques.

This coursework is based on an imaginary small office and gym building based on the layouts of Mallard House at UWE Frenchay. 

These are provided in PDF. 

Drawings of Mallard House

Word Count:

As a technical report, the UWE standard guidance of 1000 words is a difficult metric. The words in this report are simply used to describe your calculations and methodology. The majority of your report should be tables, diagrams and calculations.

Formative Feedback:

This will be given on extracts of coursework (approx. 50%) from drafts of the Reports and Essay before submission. You will need to allow at least 10 term-time days for a response.

Coursework Submission:

This coursework should be submitted digitally, in a single A4 PDF portfolio.

Where drawings are requested, these can be digital or neat hand drawings. Drawings need to sit in the report, within the section required, not just as an appendix. If screen grabbing or you are finding it hard to get a good resolution for the drawing, then you can also include an appendix within the single PDF.

The most important aspect is that they are clear. You do not need to use CAD unless you find it simpler. Marks will be awarded for clarity, accuracy and methodology, not for the drawing technique selected.

You will need to show workings for all your calculations and reference all figures used in the calculations to get full marks. Anyone providing answers alone will be given zero marks for that section.

You may use a spreadsheet for your calculations; however, it must be clear how you arrived at the answer in your report, we will not be checking formula used within the cells of the Excel sheet to check working out, you need to state within the report what calculations you have used in all the cells. Without this information, we will not be able to mark your submission for these sections

Please note that the submission deadlines are absolute and based on UWE server time; therefore, you are strongly advised to submit work well ahead of the deadline dates to avoid situations where penalties could be incurred. Penalties are imposed if a submission is made up to 24 hours after the deadline, and the highest mark you can receive will be the minimum pass mark (if the assessment is passed). After 24 hours have passed, the work will not be accepted for marking.

Questions: 

A)Water Services and Drainage [35 marks] 

The water supply and drainage section of this assignment is focused on the ground floor area, specifically the restroom near room L02. 

1. Task 1:Develop a drainage system layout and accompanying schematic for this area. Justify your design choices directly on your drawing. [15 marks] 

2. Task 2:Perform calculations to establish the flow rate for each vertical drainage stack proposed in your design. [5 marks] 

3. Task 3:Create a layout and schematic for the domestic water supply system for the same area described in Task 1. This should include the following details: 

a. Indicate the Loading Units (LUs) and pipe flow rates on the schematic for all parts of the system (pipe sizes are not required). 

b. Calculate and present the total loading units for the entire system. 

Assume the system is supplied by a mains cold water tank sized to meet 20 minutes of peak cold water demand. The tank is situated in the plant room, and hot water is provided by a central tank heated by the main building's heating system. [15 marks] 

B Heating Systems (25 marks) 

ii. Heat Loss Calculations: Perform a detailed heat loss calculation for the following rooms: 

L01 
L02 
L06 

iii. Summary Table: Provide a table summarising the final heat loss for each room in watts (W). Also, convert the heat loss into watts per square meter (W/m²) for each room and include these values in the table. [15marks] 

5. Task 5: 

Now, you need to design a pipework system and calculate the pressure drops throughout the system, based on the radiators and heat loss values you have determined in the previous questions. 

Use the following assumptions: 

The boiler and pumps are located in the plant room as shown on the plans. 
The key tasks are outlined below: 

Layout and Schematic: Create a layout and schematic diagram of your pipework system. 

Index Radiator: Indicate on your schematic which radiator will serve as the index run. Justify selecting this radiator (note: you are not required to calculate alternative pipe runs). 

Flow Rate Calculations: Determine the water flow rates throughout the entire system. [10 marks]

C)Mechanical Ventilation and Cooling [40 marks] 

Introduction 

Please note that within this section of the coursework, the location of the AHUs may differ from that noted in the acoustic question above. 

AHU01-Library (L01) (shown in blue on images below). Some of the rooms you developed for the first coursework are now going to be heated and cooled using 4 pipe fan coil units. 

A mechanical ventilation system will therefore be used to ventilate all the rooms through a single air handling unit (AHU01) located on the roof above L23. The unit will be designed to provide conditioned supply air at the required room temperature. 

AHU02-the Study room (shown in yellow on images below) The study room (L03) will be provided with a separate AHU (AHU02), which will do cooling and ventilation. This unit is to be provided on the roof above L21 (as shown below). The study room will be heated separately by radiators. I.e. you only need to ventilate and cool via the AHU 

Local MVHRs-library support areas (shown in green on images below). Support rooms will be provided with local MVHRs at a high level in the ceilings, taking air from the façade. They will also be provided with fan coil units to provide heating and cooling. 

Internal Design Conditions 

• Library and study room: 

max 22oC Summer; min 24oC Winter. You do not need to worry about Relative Humidity. 

• All other rooms: 

24oC Summer, 22oC Winter 

External air temperature: 15oC winter, 45oC summer 

Heat Gains [10 marks] 

Work out your sensible heat gains within the Library L01. 

Provide a summary table at the end stating the total sensible load for each internal gain and the final total sensible cooling demand for the room. 

Assumptions: 

• Refer to the occupancy data provided previously.
• Sensible heat gains from occupants should be calculated using standard values from relevant literature.
• Equipment and lighting heat gains should be based on literature values; however, add an extra 2.0 kW for equipment in the library. 
  It is assumed that gains from fabric and infiltration are negligible, so these can be disregarded.
• Use a glazing G value of 0.30 and assume no additional solar shading.

AHU02 Flow rate and Diffuser Layout [10 marks]

From the answer to question 5, work out the flow rate required to cool the room, based on a supply temperature of 20 °C. 

Select a suitable diffuser for the supply and extract, then provide a diffuser layout (not including ductwork) for the room using the following diffuser: 

AHU01 Ventilation only, Layout and Schematic [10marks] 

Develop a layout for the ventilation system associated with AHU01, including the provision of a suitable riser location for the ductwork extending from the roof to the ground floor. 

Allow for a fresh air flow rate of 15 l/s per person. You do not need to specify the grilles; assume each grille can handle a maximum of 60 l/s for supply and 90 l/s for extract. (Note that most grilles can accommodate higher capacities, but these figures are used for simplicity in this exercise.) 

Design the system as a constant air volume system. In the schematic, include the components of the AHU, such as filters, heating and cooling coils, and heat recovery systems. 

Pressure Drop Calculation [4 marks] 

Based on the ductwork schematic and layout developed in question 7, work out the pressure drop of the supply fan only and the associated fan power. Assumptions: 

• Assume the Air handling unit has an internal pressure drop of 110 Pa.
• Assume all grilles have a pressure drop of 10 Pa
• Allow a pressure drop on the intake to the fan of 15 Pa
• Assume a fan power efficiency of 80% 

Provide the following information: 

a)State where the index run is, show this on the schematic and explain why you have chosen this (detailed calculations for this are not required, just where you consider the run to be). [3 marks] 
b)Calculate the fan power. [1 mark] 

Variations [2 marks] 

Assuming AHU01 achieves 75% heat recovery, calculate the required water flow rate for the heating coil in the unit. Clearly state any assumptions made during your calculation.