Building Environmental Services Integration
Scenario
A 3-storey office building is to be provided by mechanical, public health, and electrical
systems. The building has the basement and top roof spaces available for plant
allocation. You have been approached by the client from the outset to give advice on
the integration of Mechanical & Electrical building services in this building. You are faced
with the following duties to perform:
MECHANICAL HVAC SERVICES
1. Propose a model for the office building, sketch and describe a Mechanical system
to be installed in this building justifying your choice.
2. Explain THREE factors that should be included in the decision on the position of
the plant? Give examples and illustrate your answer. What safety precautions
must be taken in this building in areas occupied by disabled people?
3. State, with reasons, the appropriate combinations of natural and mechanical
ventilation for the toilets and basement boiler room areas in this building, support
your answer with clear sketches where appropriate.
4. It is found out that if a high level air supply system is used in this building there
would not be enough space in the ceiling void (above the false ceiling) to
accommodate ductwork and air supply boxes. Recommend a proposal on what
alternative system should be used and why. Comment on all aspects that you may
consider.
5. If an air handling unit is allocated on the roof and the refrigeration plant is in the
basement, by means of a clear sketch show how they are linked to each other.
What builders work is needed to accommodate air distribution installation with
regard to the shell and the core of the building? Can a heat pump system be used
in this office block to replace the air conditioning and part of the central heating
system? Justify your answer.
ELECTRICAL SERVICES
6. Prepare a site programme for the main contractor for the installation and
operation of temporary site electrical services for this building including the
factors that should be taken into consideration?
LIGHTING PROVISION
7. Propose an artificial lighting system for one typical floor. Explain the reason(s) for
your choice.
8. How can your proposal contribute to a “sustainable building design” and how can
it be integrated with the provision of daylight to minimise on the use of electrical
lighting?
FIRE & SECURITY SYSTEMS
9. If a sprinkler system is proposed in this building, explain how it functions, giving
details of the alternative operating modes available and how it integrates with the
building control system. State the suitable sources of water for sprinklers.
Useful Reference materials
1. F. Hall, Building Services & Equipment, Longman. 2000.
2. Chadderton, D.V., Building Services Engineering, Spon. 2004.
3. CIBSE – Guide books A & B, Chartered Institution of Building Services Engineers.
4. ASHRAE Guides (American Society of heating, Refrigeration and Air conditioning).
5. Hall & Greeno. 2002 Building Services Handbook. 2nd ed. Butterworth Heinemann.
6. Faber & Kell ’ s 2008 Heating and Air-Conditioning of Buildings Tenth edition