## BUILDING SERVICES ENGINEERING DESIGN 1

 SHE Level 3 SCQF Credit Points 20.00 ECTS Credit Points 10.00 Module Code M3H221914 Module Leader Ing Liang Wong School School of Computing, Engineering and Built Environment Subject Civil Engineering and Environmental Management Trimester B (January start)

### Pre-Requisite Knowledge

Level 2 modules for BEng Building Services Engineering or equivalent

### Summary of Content

This module (BSED1) teaches the fundamental subjects of acoustics, vibrations, lighting, electrical machines and electrical supply. Each of these subject areas is of considerable importance to the building services engineer and will be developed further in BSED2, which concentrates more on applications and design considerations.

### Syllabus

The taught syllabus will cover the following areas: ACOUSTICS AND VIBRATIONS Introduction to sound: Sound waves. dB scales with addition and subtraction of levels. Defintions of sound pressure, sound power and sound intensity levels. Octave and third octave band analysis. Response of the human ear. Equal loudness contours and the phon and sone scales. A-weighting. Sound level meter. Community Noise Measures: Stevens and Zwickers methods. Noise Rating (NR) and Noise Criteria (NC) curves. Perceived Noise Level (PNL) and the noys scale. Equivalent Continuous Sound Level (Leq). Sound Exposure Level (SEL). Statistical analysis of noise using cumulative distribution curves, percentile levels (L1, L99 etc) and probability distributions. Sound Transmission: Transmission of noise through walls and floors. The mass law. Transmission co-efficient. Sound Transmission Loss and its measurement (BS 2750). Coincidence. Sound Transmission Class. Sound Transmission through composite walls (with and without apertures). Sound transmission in ducts. Room Acoustics: Reverberation time. Room constant. Directivity. Sound Fields. Room acoustics formulae. Vibration: Simple harmonic motion. Free vibrations, with and without damping. Natural frequency. Critical damping. Forced vibration, with and without damping. Force transmissibility. Dynamic magnification. Vibration isolation. Selection of machine supports. VISION AND LIGHTING Eye and Vision: Human eye- structure, visual response to age, visual activity, adaptation. Photopic, scotopic and mesopic vision. Contrast sensitivity. Colour. Glare - discomfort, disability, reflected and veiling. Brightness. Stroboscopic effect. Law of diminishing returens. Data Presentation: Luminous intensity and flux. Illuminance and luminance. Luminous efficiency of a light source. Polar curves. Isocandela diagrams. British Zonal System. Flux calculation. Lighting Calculations: Point, line and area sources. Radiation and Light Production: Kirchoff, Boltzmann and Wein Laws. Incandescence - colour temperature. Discharge lamps - pressure/current density. Electro luminescence principle. Artificial Light Sources: Incandescence sources - tungsten, tungsten-halogen. Electrical discharge lamps - mercury, metal halide, sodium, fluorescent. Discharge lamp circuitry. Photometry and Colourmetry: Photo-electric effect. Photo voltage and conductive cells. Intensity distribution photometry. Integrating sphere usage. Methods of specifying colour. Colour mixing. Munsell system. CIE chromacity diagram. Luminaires: Mechanical, electrical, thermal and enclosure requirements. Light control - reflection, refraction, redirection, transmission, absorption and diffusion. Exterior and hazardous use units. Light output ratio - DLOR and ULOR. Optical design. ELECTRICAL POWER Static Power Conversion: AC/DC: single-phase half-wave, single-phase bridge and three-phase bridge rectifiers, half and fully-controlled, with and without commutating diode. Resistive and inductive loads. Speed control of DC motors. AC/AC: square- wave, quasi-square and PWM, single and three-phase inverters feeding inductive loads. Speed control of AC motors. UPS systems. Electronic and Communication Systems. Internal communication systems and external interfaces (video, data, voice). Fire Alarm systems. Security and supervisory systems.

### Learning Outcomes

On successful completion of this module the student should be able to:The Engineering Benchmarks A1,A2,A4,B1,B2,B3,B4,B5,B7,C1,C2,C3 and C4 as specified in the BEng Building Services Engineering Specification Document apply to this module.1. Operate a typical integrating sound level meter and understand the significance of measurements taken (A1,C2)2. Assess broadband sound levels against a range of criteria (B2,B7)3. Calculate sound transmission loss through walls containing doors, windows and air gaps. (A1,B1,B2)4. Calculate attenuation in ductwork systems (A1,B1,B2,B4,C1)5. Select supports of appropriate stiffness for machines used in the built environment (B1,B2)6. Describe units and forms of presentation of light data and visual responses of the human eye (A1)7. Specify light flux from polar curves for sources of artificial light (A1)8. Describe methods employed in photometry and colourmetry and the thermal and electrical requirements of luminaires (A1,B1,B2)9. Calculate illuminance from point, line and area sources (A1,B1,B2,B4,C1,C3,C4)10. Describe and analyse AC/DC and AC/AC static power conversion schemes and describe applications relevant to building services (A2,B1,B2)11. Describe the use of electronic systems (voice, video and data) used within buildings12. Design simple communication, fire alarm and security systems using the standard symbols for installation items as necessary.

### Teaching / Learning Strategy

Most material will be presented to students in the form of word-processed handouts. Lectures will be used to highlight areas of special importance and difficulty and as a basis for discussion. The technical nature of the material will require a substantial time allocation for tackling tutorial questions. Laboratory periods will be used to demonstrate principles wherever possible to reinforce the learning process and to provide material for courseworks. Learning and teaching strategies will be developed and implemented, appropriate to students' needs, to enable all students to participate fully in the programme.

Foreman J., Sound Alaysis and Noise Control, Kluwer Academic Publishers, 1990 Smith B. J., Acoustics and Noise Control, Longman, et al, 1996 Fry Alan, Noise Control in Building Services, Pergamon, 1988 Wilson, Charles E., Noise Control: Measurement, Alanysis and Control of Sound and Vibration, Krieger Pub Co, 1994 Reeves Charles W., The Noise and Acoustics Handbook (Coxmoor's Machine & Systems Condition Monitoring S.), Coxmoor Publishing Co., 2001 Noise and Vibration Control for HVAC, (CIBSE guide), CIBSE, 2002 Ambrose J., Ollswang J., Simplified Design for Building Sound Control (Parker Ambrose Series of Simplified Design Guides), John Wiley & Sons, Inc, 1995 Code for lighting, CIBSE, Butterworth-Heinemann, 2002 CIBSE Lighting Guide LG3: the Visual Environment for Display Screen Use (CIBSE Lighting Guide), CIBSE 1996 CIBSE TM10, The Calculation of Glare Indices CIBSE Student Member's Data Book, CIBSE, 2004 Cayless M. A., Lamps and lighting, Architectural Press, et al1996 Pritchard D. C., Lighting, Longman, 1999 BS7671, 2001 IEE Wiring Regulations: 16th Edition, 2001 Whitefield J., The Electrician's Guide to the 16th Edition of the IEE Wiring Regulations BS7671, 2002 Lander C., Power Electronics, McGraw Hill, 1993

### Transferrable Skills

The Engineering Benchmarks D1,D2,D5,D6 and D8 for transferable skills as specified in the BEng Building Services Engineering Specification Document apply to this module. Technical knowledge and analytical skills developed in this module would be of considerable use in a wide range of science and technology based professions. (D5,D6) Quality of presentation of coursework material will be encouraged to enhance report-writing and communication skills. (D1,D2,D5,D6,D8)

### Module Structure

Activity Total Hours
Assessment (PT) 18.00
Independent Learning (PT) 128.00
Practicals (PT) 6.00
Seminars (PT) 6.00
Tutorials (PT) 6.00
Lectures (PT) 36.00

### Assessment Methods

Component Duration Weighting Threshold Description
Course Work 02 n/a 20.00 35% Design Lab Excercise x 1000 words approx
Exam 01 2.50 60.00 35% Unseen exam
Course Work 01 n/a 20.00 35% Excercise - x 1000 Words