The choice of changing the cooling point in glass-fiber cooling towers from outdoor to indoor directly affects the cooling duration of the system. Assuming that the calculated water temperature required to end the air conditioning at this point is 12.7°C, considering the cooling tower's cooling capacity, pipeline, and heat exchanger losses, which cause the water temperature to rise by 4.5°C, it can be determined that the cooling tower cooling mode can be switched to when the outdoor wet-bulb temperature is equal to or below 8.2°C.

After selecting the glass fiber cooling tower based on the summer cold load and outdoor wet bulb temperature, it is also necessary to verify its cooling capacity under the cooling tower's cooling mode.

In indirect cooling systems, plate heat exchangers should be selected. Compared to traditional tube-and-shell heat exchangers, plate heat exchangers offer superior heat exchange capabilities.

In direct chilled systems, a bypass should be installed for the chilled water pump in the cooling water loop. When using the cooling tower for chilling, the chilled water pump is turned off, and the cooling water bypasses the pump. At this moment, the circulating water's dynamic force is supplied by the chilled water pump. Therefore, when planning the system, consider changing the chilled water pump.

In direct chilled system planning, it is crucial to prioritize the sterilization and filtration of cooling water to prevent blockage of the end pipes.

Considering that the cooling tower's cold range (the difference between the cooling tower's outflow temperature and the outdoor wet bulb temperature) decreases as the scale of the cooling media increases under specific outdoor wet bulb temperatures and building loads, it is feasible to employ a series configuration of cooling towers within a multi-tower system to enhance the cooling effect. This approach raises the outdoor replacement temperature for the cooling tower's supply method, subsequently increasing the duration of the cooling supply.

Glass fiber cooling tower manufacturers take into account that the primary function of cooling towers in providing cooling is during the filtering season in winter. Therefore, in regions with lower temperatures during winter, anti-freezing equipment should be installed in the cooling water system, such as setting auxiliary pipes or adding heaters.

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