project
57
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1
2
3
1.
2.
4
3.
4.
inside the tanks. Inside the tanks are a collection of
coils, and the hot water comes from the coils. The heat
pump is actually the heating medium and we never use
that water, as it stays circulating in that tank. Block B
also houses a retail section, but it is not connected to
our system.”
Challenges
Elsey said that the original engineers submitted a
design that the supplier knew wouldn’t work. Their
contract was cancelled and AGE was brought into the
project late.
The client should enjoy a 60–70% saving in electricity
costs, Elsey says. AGE has a track record of this on
other buildings, according to Elsey. This new system
makes for happy students who can all get into hot
water, in the nicest possible way. PA
www.plumbingafrica.co.za
The temperature gauge shows that
the water delivered and circulated
in the tanks is at 59.55°C from the
heat pumps.
All connections to the heat pumps
are installed with isolation valves
and are flanged to the tank.
Students in the retail section.
The exhaust fans for the Block
A heat pumps discharge via the
basement fans.
Table 1. Cold water demand calculations
Type
Type
Retail
Retail
Student
Flats
F1
F2
H2
H1
Block
A
B
Retail
Square
metres
4 666
1 494
N/A
N/A
Min. ℓ/day
29 160
86 400
2 910
Population Per litre
Total
Operating hours Storage
22
150
450
900
2 750
2 100
60 750
180 000
15
15
12
12
Total
125
14
135
200
1 650
1 260
29 160
86 400
118 470
*Note these do not include Fire reserves.
LIST OF PROFESSIONALS
Owner
Contractor
Wet services
Architect and principal agent
Infrastructure pipework and hot water
Supplier: Heat accumulators
Southern Storm Properties
Dale Bannatyne
AGE Plumbing Design Technicians
SW Design Architects
Langamanzi Technology
Integrated Energy and Environmental Solutions (IEES)
November 2016 Volume 22 I Number 9