Plumbing and reticulation system design Assignment

CPCCBC5009A: Assessment 4
TASK CONTAINED:
Part A: Plumbing and reticulation system design
Part B: Lighting and wiring diagram
Part C: Brief Report on Viable hot water system
Part D: Brief report on Individual air condition system
Assignment relates to the following Project:
19735 Project 2 Medium Rise Apartments
Job Address: 2135 The Boulevard, Strathfield, NSW
Job Title: Proposed Commercial and Residential Development
Client: AKM Developments
Architect: Olympic Designs, 55 Olympic Pde, Homebush, NSW

Part A: Plumbing and reticulation system design
A.2: Plumbing system design
In this case, we select the fully vented modified system which is normally composed of fixtures that discharge to the same
common graded discharge pipe. Singularized air admittance valves are eliminated and there is no individualized venting
of fixtures like the fully vented system (This is as per AS 3500, part 2).
This system was selected due to the following reasons:
-It is relatively cheaper than the earlier version as it eliminates unnecessary duplication of the admittance valves
-It operates in a quiet fashion with almost zero foul smell allowed within the building
-There is also economical use of space as the layout optimizes the available space.
-Normally discharge of individual vents is via common discharge pipe

Figure 2: Fully vented modified system
A.3: How System Operates:
In this system, there is a heating plant composed of gas heater and heat exchanger (mostly located at the lowest levels of
the building but in a secure place) such that the tube bundles receive heat from the hot flue gas (burnt in the gas heater)
and this heat is transferred to the cold water which flows from the reservoir (installed at the roof top) so that water can
easily flow by gravity. In the design, the system is integrated such that cold water can still be supplied to the designated
areas by utilizing by pass lines as shown. Meanwhile, the used water is recycled by being directed to a water treatment
plant within the building and later is pumped to the second reservoir (also installed on the roof top). The recycled water
can be used in wet areas to facilitate, for instance, human waste flashing. The fresh water can be utilized in the wet areas
as in washing clothes and bathing among other uses apart from cooking and drinking which must be sourced from the
local council water supply.

A.3 ‘stack work’ diagram
Figure: Stack work diagram (sectional view)
Figure 2: A stack work diagram

How system works:
The waste water from the wet areas is drained into a single trunk as shown via the branching drainage lines shown. This
water is safely and quietly conveyed to the main drainage line underground and disposed at a safer distance. The ball-like
feature is the venting system to drive out foul smell and maintain proper internal air conditions. It allows fresh air to freely
jet in and freshens the building interior while disallowing accumulation stale air.

A.1 Reticulation system design
Figure 1: Water Reticulation system schematic design

Part B: Lighting and wiring diagram

Part C: Brief Report on Viable hot water system
In selecting the most viable hot water system would often involve enquiring about the building requirements, the financial
capacity of the owner, local regulations and the occupant’s preference, climatic conditions among others. However, far
from these factors, there are basic selection criteria and the following discussion provides the merits and limitation of each
system:
CRITERIA 1.Solar heater 2. Heat
pumps
3.
Instantaneous
water heater
4. Main
pressure
heaters
Gas water
heaters
Cost This is the
cheapest
system to run
however it
normally
requires higher
costs initially
Initially
higher costs
of
installation
Also relatively
cheap
Since no
venting
required,
operational
costs are
minimized
Since
permanently
available,
tariffs do not
vary

Efficiency and
Reliability
Not very
reliable as
radiant energy
is dependent
on climatic
conditions
hence not
suitable for
large and
complex
buildings;
Boosters may
be needed to
ensure
continuous
supply of hot
Low energy
consumptio
n
Not suitable for
heavy building
s
Only efficient
in high
volume
heating as
the heat can
only be
stored for
awhile and
then it
dissipates
Their
efficiency
have been
boosted;
they are the
most
suitable
systems for
large and
complex
buildings.

water
Logistics Economical in
small
residential
buildings as it
can easily be
squeezed in
the available
space and
usually it
integrates very
well with most
homemade
designs; It is
also
environmentally
Complex
system for
installation
and running
Compact size
makes it
suitable for
economical
space
Can be
connected
directly to the
main water
supply hence
most suitable
for large and
complex
buildings.
In large
buildings,
the system
complexity
may
increase

friendly
Ease of
operation
Since running
costs are
smaller, it can
easily be
operated,
Complex
system to
operate
It is easy to
install and only
one tap at a
time can it
supply ,
Requires 3-
phase wiring
Suitable for
indoor use
and the
heaters can
be located
securely in
hidden
areas within
the house
Since it is
normally
integrated
with
controls, the
system can
easily be
operated
remotely
Energy/fuel
supply
availability
Radiant energy
is in abundant
in summer
hence
maximum
availability
Utilizes
electricity to
drive the
system
Utilizes
electricity to
heat the water
Utilizes
electricity
Delivers the
highest
thermal
performance
per unit
weight of
fuel burnt;

however, it
is a major
source of
pollution
and a fire
risk if not
properly
managed
Size of heater No need for
heater instead
solar collectors
are used to
capture radiant
energy
Heat pumps
are utilized
as heaters
Small size
making it ideal
for use in
constricted
space;
However
temperature
varies with flow
rate;
Smaller
hence can
be
individualize
d
The heater
is a boiler
with tube
bundles and
size may
vary
depending
on such
factors as

building hot
water
demand
among
others
Part D: Brief report on Individual air condition system versus wide building system
There are two basic types of air-conditioning systems based on the end users;
individualized units and building wide systems. In central air conditioning system,
conditioned air is from a central location before distributing to all the rooms, it cools,
dehumanizes and blows air into the duct system. On the other hand, individual air
conditioning system conditions each unit such that plant rooms are located in every unit
hence excess noise and more energy consumption is realized. Centralized system is often

composed of fans which develop the pull effect and introduces air into the system. Notably,
decision to select either of them would be dependent on certain criteria:
Impact to the power load:
Since individual units vary in performance, collectively, the thermal load is higher as
individual requirements are accommodated. In wide building system, the system is
centralized and distribution losses are minimized hence less thermal load.
Individual tenants needs
The requirements of each tenant are normally met in individual air conditioning systems.
However for wide building system, since all tenants are supplied with conditioned air from a
single source, individual requirements may not be met.
Safety requirements

Since each individual tenant has his/her own unit, there is a greater potential for fire
outbreak and spread than in the building wide system where fire outbreak can easily be
controlled since the plant room is centralized.
Longer lifetime and prudent resource use
Building wide system has a longer lifetime than individualized system. This translates into
lower electricity consumption. There is often less requirement in maintenance. In terms of
recycling, there is higher potential. Besides, the centralized system uses less resource
since the system uses large quantity of water pipes for the air ducts.