|
Product Bulletin
Metric Measurement
AQUA SYSTEMS
Water Cooled Condensers
for Air Conditioning.
The
Aqua Systems series water cooled condensers are of a unique design providing
a very high level of heat exchange efficiency between refrigerant and
water. The extended surface tube with internal spiral fin extends the
surface area up to 3.7 times that of plain tube. A tube geometry exclusive
to Aqua Systems condensers results in a close tolerance refrigerant path
and suitability for the ecologically sound "Freeze cleaning" of water
tubes should fouling occur.
Reduced Water Circulation.
Air conditioning
equipment utilizing Aqua Systems water cooled condensers will operate
efficiently with a lower water circulation rate due to the high level
of heat exchange efficiency. Following are typical examples of conventional
shell and tube or tube in tube condenser performances compared to air
conditioning units with Aqua Systems condensers.
|
Shell &
Tube |
Tube in Tube |
Aqua Systems |
| Total Heat Rejection |
22.8 kW |
22.8 kW |
22.8 kW |
| Condensing Temp. |
42 °C |
42 °C |
42 °C |
| Liquid Sub-Cooling |
6 K |
4 K |
4-6 K |
| Entering Water
Temp. |
29.5 °C |
29.5 °C |
29.5 °C |
| Leaving Water
Temp. |
35 °C |
35 °C |
38.5 °C |
| Water Flow Rate |
1.14 l/s |
1.11 l/s |
0.62 l/s |
| Water Side PD |
45 kPa |
56 kPa |
42 kPa |
The condenser water
circulation rate for an installation utilizing water cooled air conditioners
with conventional water cooled condensers is approximately 0.05 l/s per
kW THR.
By comparison the
condenser water circulation rate for an installation using Aqua Systems
water cooled condensers is approximately 0.027 l/s per kW THR. This is
a reduction of approximately 46% in the amount of condenser water required
to be circulated.
Note: Graphic
is in metric units.
Cooling
Tower Effect.
The comparative selection of a cooling tower with a heat rejection capacity
of 200 kW is as follows:
|
Conventional
System |
Aqua Systems
System |
| Total Heat Rejection |
200 kW |
200 kW |
| Condensing Temp. |
42 °C |
42 °C |
| Supply Water
Temp. |
29.5 °C |
29.5 °C |
| Return Water
Temp. |
35 °C |
38.5 °C |
| Entering Wet
Bulb Temp. |
24 °C |
24 °C |
| Water Circulation |
10 l/s |
5.4 l/s |
| BAC Tower Selection |
*VXT45 |
*VXT40 |
*BAC Cooling tower
selection courtesy of G.S.WAGG Pty Ltd.
An air conditioning
system with Aqua Systems condensers would reduce the cooling tower size
- condenser water pump size and condenser water recirculation pipework
size.
This will result
in installation and operating cost savings.
|