COOLERS AND CONDENSERS
Compression cooling with conservation
For many production facilities, compressed air is a critical utility. Much like power, compressed air is the life blood of the production facility. Many industrial air compressors require water cooling for efficient operation. Traditionally, evaporative cooling equipment has been employed to provide such cooling at the expense of dramatic water consumption. Güntner’s Adiabatic Cooling System now gives facility owners a cooling option that maintains peak efficiency while drastically reducing water consumption.
W
ith growing concerns of the scarcity of water, rising cost of water, cost of water treatment and draught
conditions, facility owners are focusing on water conservation in order to be good stewards of the earth. One such facility owner has opted to employ the Adiabatic Cooling System (ACS) at multiple sites. By using water only on peak days, the ACS cooler can reduce water consumption to 20% of a conventional water cooled system and reduce peak energy demand versus a dry system. A system that is wet when you need it and dry when you don’t, the ACS combines the reliability and ease of use of a dry cooler with system efficiencies associated with water cooled equipment.
At peak ambient temperature, the air entering the finned heat exchanger is pre-
30 March 2017
cooled by wetted cooling pads to a temperature approaching the wet bulb temperature, without aerosol formation and without applying water to the finned surface. The pre-cooling process maintains the required leaving fluid temperature at peak ambient conditions.
At one such site, near Montague, CA (USA), an evaluation of energy and water consumption showed the adiabatic cooling option provides a significant savings in both cost to operate as well as amount of water used. The ACS cooler provides a 45% savings annually in the cost of electricity and water; and, perhaps more importantly, an 80% water use savings.
It can be shown by looking at the cumulative resource (water and electricity) consumption of the ACS based on weather bin data, that the wet hours are limited to only the warmest hours,
whereas the evaporative unit requires water use throughout the year. In this example, the evaporative unit consumes about 4921m3
annually. of water
annually. The ACS in contrast consumes a fraction of that at about 984 m3
Through continuous monitoring of system parameters, the ACS technology determines the precise amount of water feed needed for maintaining performance. Water feed is precisely controlled and monitored via a high pulse rate water meter.
Water usage is minimized along with eliminating the need for expensive recirculation and water treatment systems. This effective means of water management through omission of recirculated water sump with its potential for stagnant water and no use of aerosols helps to mitigate the proliferation of Legionella.
www.acr-news.com
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