For an AC water cooled chiller what will be the best place for erecting cooling towers if the building roof does not allow for that.
Dear Kamal,
It's an interesting and important question.
The best place for cooling towers is where shadow is provided especially in pick hot hours. If the location is in the northern hemisphere, somewhere in the north/East sides of the building would be usually safe. In the sourhern hemisphere: south/East sides would be better. The shading effect could be provided either by the building itself, or by the surrounding buildings, trees, topography, etc.
Putting the cooling towers within the flows of the natural winds in the building site, would help the performance of the machinery.
By applying he abovementioned strategies, you may save energy and reduce the maintenance costs.
It is also important to consider acoustical strategies in design of the adjacent spaces, in case the cooling towers may produce loud noise.
Hope these help.
Best,
Aryan
A wet cooling tower loses a lot of war due to entrainment and drift. The best location depends on the local climate and access of clean fresh makeup water. In general, it is good policy to locate the CT with sufficient clearances of adequate air flow (which means perhaps raining it off the ground, which ideally means putting it on the roof of the building), while at the same time making sure there is sufficient access for maintenance.
Thank you Aryan,Fred and Jimmy for the useful information. I would like to add one more thing. if these towers are to be used to cool a 3000 TR chiller to be used to cool a hospital at a tropical place where temperatures may soar to 45oC in summer will it be acceptable to put these towers on the ground south west of a 12 storey building?
The site which these cooling towers are to be installed is within a high dusty region where dusty winds used to prevail especially nowadays and will continue for more than 4 months a year. This means heavy dust load is expected and if these towers are erected on the ground as you suggested we will be faced with the problem of how to get rid of the mud that will accumulate in the tower basin. Another problem is that ground cooling towers will increase humidity in the nearby environment being a hospital. Humidity is a good inhibitor to bacteria which is not welcomed in that environment. How about placing the towers on the roof of the building?
Please check the following link, hope it helps!
http://www.waterboards.ca.gov/water_issues/programs/ocean/cwa316/rcnfpp/docs/121813mtg/bechtel_tower_location.pdf
I think your concern is about Shamals. The sand particles are too fine to be screened out of the incoming air. The best solution is to have an inclined (but flat) basin with a solids/mud collection trough at at the low elevation end. The trough itself should be inclined in the transverse direction so the mud can be easily removed from the low-point drain port.
That you wish to use a cooling tower in spite of the conditions, means to me you require the web bulb benefit. However on a humid hot day, that will not provide enough comfort. This means you are going to use trans-critical CO2.
If that is correct, we have new technology, possibly too late for your project, where the water is able to be used in the gas cooler at 80 bar, and also interface with the cooling tower at ambient pressure.
As you don't know about this proprietary technology, I enclose a 1 minute lesson and apologize for my boldness.
Conventional wisdom in the Middle East is to get the towers off the ground (10m+) as ground level is where considerably greater levels of sand intake occurs.
I'm a bit wiser now, I was only trying to help by introducing you to pressure exchangers.
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