Product Bulletin
U.S. Standard 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 | 78000 BTU | 78000 BTU | 78000 BTU |
| Condensing Temp. | 108 °F | 108 °F | 108 °F |
| Liquid Sub-Cooling | 11 °F | 7 °F | 7-11 °F |
| Entering Water Temp. | 85 °F | 85 °F | 85.1 °F |
| Leaving Water Temp. | 95 °F | 95 °F | 101 °F |
| Water Flow Rate | 18 GPM | 17.6 GPM | 10 GPM |
| Water Side PD | 7.5 PSI | 9.3 PSI | 7 PSI |
The condenser water circulation rate for an installation utilizing water cooled air conditioners with conventional water cooled condensers is approximately 3 GPM per ton.
By comparison the condenser water circulation rate for an installation using Aqua Systems water cooled condensers is approximately 1.6 GPM per ton. This is a reduction of approximately 46% in the amount of condenser water required to be circulated.
Cooling Tower
Effect.
The comparative selection
of a cooling tower with a heat rejection capacity of 57 tons is as follows:
| Conventional System | Aqua Systems System | |
| Total Heat Rejection | 57 tons | 57 tons |
| Condensing Temp. | 108 °F | 108 °F |
| Supply Water Temp. | 85 °F | 85 °F |
| Return Water Temp. | 94 F | 101 °F |
| Entering Wet Bulb Temp. | 75 °F | 75 °F |
| Water Circulation | 158 GPM | 85 GPM |
| 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.
