Cold Link Africa January/February 2018 | Page 28

PROJECT
INCORPORATING COLD CHAIN
( particularly at vineyards in Kakamas), contacted the local Seeley team and together they devised a suitable solution.
And so came about South Africa’ s first pre-cooled wine-specific application for Seeley.( As there is another Seeley unit serving the growing room, the client was not completely new to the brand.)
Generally, the capital expenditure for indirect evaporative cooling equipment such as that of Seeley’ s, is much higher than the outlay for refrigerated AC. However, because of the Bosman farm’ s remote location, another cost had to be factored in: that of a power upgrade.
The cost of upgrading the power supply to support a refrigerated AC solution and all the equipment that comes with it, would have been exorbitant.“ We calculated that to put up a refrigeration cooling solution instead, the price would have been about 20 – 30 % more expensive to meet the same temperature and humidity
requirements,” explains Louw.“ That’ s just because of the low power requirement. Not even considering the added benefit of low operating costs.”
Two Seeley Climate Wizard Supercool
CW-H15S units were installed to deliver:
• Supply airflow: 3 400l / s
• Supply temperature: 15.8 ° C
• Input power: 3.6kW
Climate Wizard Supercool is the latest evolution of the successful Climate Wizard range of indirect evaporative coolers. It achieves even greater cooling capacity
by adding a specially designed direct evaporative stage after the indirect heat exchanger. By using this technique, the very low supply temperatures achieved by the indirect heat exchanger are further cooled with required moisture being added to the supply air.
The unit’ s ability to provide the necessary cooling performance at a very low operating cost is due to the fact that it uses no mechanical compressors or harmful refrigerants.
The system at Bosman meets all the client’ s requirements despite a very high
ambient temperature, and the room is also positively pressurised with the help of dampers.
These dampers relieve the temperature in the room when the room reaches a certain internal static pressure. Because the room is constantly being supplied with fresh air, the pressure would continue to rise if the pressure is not relieved. Hence, its set-up to keep the room pressurised just enough to not have any germs or dust enter the space.
The walls and roof are also very well insulated, and controls were kept simple.
LIST OF PROFESSIONALS
Owner
Bosman Family Vineyards
Project manager
Marius Louw( Louwco Cooling Solutions)
Contractor
Louwco Cooling Solutions
Indirect evaporative coolers
Seeley International
Product suppliers
Dampers
Advantage Air
Ducting
Entity Sheetmetal
The new imported plastic barrels being trialled.
Two Seeley super-cooled Climate Wizard units were installed to control the temperature and humidity of the room.
A tour through the lab and cloning production, from left: Marius Louw( Louwco); Hennie Verster( Seeley International); Mark Hendricks( Seeley International); and Tossie Louw( Bosman).

28

The room is positively pressurised with the help of dampers.
www. coldlinkafrica. co. za COLD LINK AFRICA • January | February 2018