2026年新实施的《机械通风冷却塔能效限定值》标准正式落地，100吨以上工业用Square Crossflow Cooling Tower的能效限定值从三级直接提升到二级，新建工业项目配套的冷却塔必须满足二级及以上能效要求，不符合标准的产品彻底退出政府采购名录。这一政策直接点燃了全国工业领域的冷却塔存量替换市场。
据行业调研数据，目前国内在运的工业冷却塔中，仍有超过40%的设备能效低于二级，这些老旧设备普遍存在Fan能耗高、换热效率低的问题，部分运行超过10年的老塔，单位冷却水量的耗电量比新国标产品高出30%以上。在“双碳”目标持续推进的背景下，高能耗冷却塔不仅增加企业用电成本，部分地区还将其纳入落后产能清单，要求限期完成改造。
市场端的反应已经十分明显：2026年上半年，一级能效Square Crossflow Cooling Tower的市场占比同比提升了27%，变频自适应控制、机翼型低噪Fan、CFD优化气流组织等技术，从高端选配变成了主流标配。不少企业在替换设备后，仅冷却塔年节电就可达数万度，1-2年就能收回改造成本。
这场由国标驱动的替换潮，正在快速淘汰落后产能，推动整个冷却塔行业的供给结构持续优化，行业正式从“增量扩张”转向“存量提质”的新阶段。
Written by: Zhongliang Yiji Technical Department · 15 Years of Cooling Tower Selection Experience | Last Updated：2026-10-17
FAQ
How to choose between a closed-circuit and an open cooling tower?
For working conditions that demand clean water (such as vacuum furnaces, high-frequency furnaces, and injection machine hydraulic oil cooling), a closed-circuit tower is preferred: the cooled medium circulates inside the coil without direct contact with air, so it resists scaling, algae and particle contamination, with stable heat transfer and low maintenance. For ordinary recirculating water scenarios with tight water budgets or cost sensitivity, an open tower costs less upfront but requires supporting water treatment.
What are the footprint and connections of a 100 t closed-circuit cooling tower?
Taking a standard 100 m3/h closed-circuit tower as an example: overall dimensions are approximately 3500 x 1500 x 2800 mm with a footprint of about 5.25 m2; inlet and outlet piping is typically DN100, with a 5-10 C temperature drop under standard conditions. Refer to the product specification table for details; non-standard dimensions can be customised on site.
How do I size the pump and head for a cooling tower?
Pump flow is selected according to the rated circulating water volume of the cooling tower; head must account for pipeline friction losses, local resistance, equipment elevation difference and the necessary margin. Pressure-bearing equipment such as injection machines also requires reserve for the working pressure. It is recommended to hand the operating data (flow, temperature difference, installation height, pipe diameter and length) to technical staff for calculation, to avoid an undersized pump or excessive head that wastes energy.
What water treatment does a closed-circuit cooling tower need?
The outer circulating water of a closed-circuit tower still contacts air, so softened make-up water, periodic corrosion and scale inhibitor dosing, and control of the concentration ratio are recommended. The inner circulating medium should be softened water, antifreeze or pure water according to process requirements; outdoor installation in winter requires freeze protection (electric tracing or draining).
