The closed cooling tower is designed with a mixed flow structure, consisting of a cooling coil, PVC heat exchange layer, fan drive system, water spray system, internal maintenance通道, and FRP outer panel. It achieves cooling and temperature reduction through the heat exchange of circulating air, spray water, and circulating water. Specifications: Single fan cooling range: 25~600m/h. Applications: Steel metallurgy, data centers, power electronics, food and pharmaceuticals, petrochemicals, coal chemicals, glass photovoltaics, LNG, etc.