Dual Making of Natural Dry and Forced Wet Cooling Towers in a Power Plant

Using of dry cooling towers or hybridized dry-wet towers is one of the well-known solutions for this purpose. In this paper, dry Heller cooling tower was combined appropriately with existing wet cooling tower to reduce the water consumption. Simulation of dry Heller cooling tower of Shahid Montazery power plant and wet forced counter flow cooling tower of Isfahan power plant was performed. Two cases of parallel and series for combination of dry and wet cooling towers was considered. The results of simulation and analysis of executive methods show that parallel use of Heller tower with wet tower is not reasonable. But series case in various ambient temperatures in two situations of changing pump system and without changing it was recognized appropriate. It was shown that there was no need for changing the pump systems and condenser works in continuous desirable condition. Water saving is full for ambient temperature below 20oC, but in more ambient temperature water saving trend is decreasing.