This blog is about Building Services Basic Design blog.
Unit code ND/BSE/ES/BSD
Unit Title Building Services Basic Design (BSBD)
Unit Status Essential
Unit Value 1.0
Learning Time 120 Hours
Pre-requisite Mechanical Science, Electrical & Electronic Principles for ND1
Exemptions None
Aims of the Unit
To enable the students:
1. To develop an understanding of the basic design procedure for the air-conditioning, plumbing and lighting in a building
2. To understand the importance of services design such as the air conditioning, plumbing and lighting systems in the building service industry.
Teaching and Learning Strategies
1. Use of common supportive material such as manufactures’ literature necessary for system selection.
2. Use supportive reference books (ASHRAE, CIBSE Guide and relevant building services books) to fulfil the understanding of basic design process.
3. Wherever possible students will be exposed to the actual site installations, specifications and actual construction / installation drawings.
Assessment Scheme
Assessment will be in accordance with BDTVEC Certification and Assessment Policy Guidelines for Trade and Technical Level programmes, July 2007 (CAG/7/2007). The weighting of the assessments will be as below:
· Phase Test 1 40% (Performance Objectives 1 – 2)
· Phase Test 2 40% (Performance Objectives 3 – 4)
· Assignment 20%
Unit Structure
This Unit Guide is for use by students and teachers as a reference guide. It is organized into skill Areas which consists of:
1. Performance Objectives, which state the skill to be acquired.
2. Enabling Objectives, which are the elements of skills a student, must acquire to perform the performance objective competently.
3. Performance standards, which identify the minimum performance a student must demonstrate for a given performance objective.
SKILL AREA
300 BUILDING SERVICES BASIC DESIGN
PERFORMANCE OBJECTIVE | ENABLING OBJECTIVE |
1. Determine the air-conditioning equipment capacity (34 Hrs)
PERFORMANCE STANDARD Given an appropriate room, related data and chart, determine the air-conditioning equipment capacity correctly according to standard practice | 1. Calculate the sensible and latent heat gain
- Identify the sources of heat gain in a building.
2. Use a psychrometric chart to determine the condition of air
- Define psychrometric, dry bulb and wet bulb temperature, relative humidity and dew point temperature
- Identify the lines and scales on the pyschrometric chart which represent the following:
a. Dry bulb temperature b. Wet bulb temperature relative humidity c. Specific humidity d. Dew point temperature
3. Determine the fresh air rating and mass flow rate of air of air conditioning room
4. Calculate the cooling load and air-conditioning system capacity |
2. calculate the duct sizes (30 Hrs)
PERFORMANCE STANDARD Given an appropriate room location, related CIBSE data and chart, size the duct system using equal velocity method correctly according to standard practice | 1. List and describe the duct system used for air-conditioning
- Loop perimeter system - Radial perimeter system - Extended plenum system - Overhead system
2. Describe the methods used for duct sizing - Equal velocity method - Constant pressure drop method - Static regain method
3. Calculate and appreciate the pressure loss of the following
- Pressure loss in straight duct using air flow charts - Pressure loss in duct fittings - Pressure loss through filters and cooling coils - Pressure loss through grills, registers and diffusers
4. Calculate the duct sizes using equal velocity method
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3. Building water supply and sanitary plumbing pipe sizing (34 Hrs)
PERFORMANCE STANDARD Given an appropriate building with appliances, size the water supply and sanitary piping correctly according to standard practice | 1. Identify the basic components of a building water supply system
2. Sizing of basic water supply piping using charts and tables
- The recommended minimum water storage requirements for different building types - The recommended water flow rate for appliances - The demand units, mass flow rate of water in copper pipes, pipe sizing
3. Identify the basic components, appliances used in a sanitary system
4. Demonstrate the basic knowledge of commonly used systems
- Ventilated system - Ventilated stack system - Single stack system
5. Sizing a basic sanitary piping system using chart and table
- Discharge unit value and flow rates of common appliances - Maximum capacity and the number of discharge units for vertical stacks - Maximum numbers of discharge units allowed on branch discharge pipes - General guidelines for the sizing of ventilation pipes and stacks
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4. Basic building lighting system design (32 Hrs)
PERFORMANCE STANDARD Given the room dimensions, use of tables and the required illuminance level, calculate the required number of lights fittings and the installation arrangement correctly according to standard practice. | 1. Define the following items relevant to the lighting design
- Luminous flux - Solid angle - Luminous intensity - illuminance
2. Demonstrate the basic knowledge of
- The cosine law of illumination - Inverse square law - Types of luminaries such as incandescent, fluorescent lights, emergency lights and their applications
3. Use Lumens methods of lighting design
- Calculation of room index - Estimation of utilization factor - Maintance factor - Calculation of room space to height ration - Use Lumen method to estimate number of light fittings.
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