大型直接空冷系统通风方式比较

为提高直接空冷系统的性能,介绍一种新型的混合通风直接空冷系统.并以2×1 000 MW级直接空冷机组为例,用数值模拟的方法,与机力通风、自然通风直接空冷系统进行比较.获得的夏季典型风速条件下背压变化规律表明：混合通风直接空冷系统比机力通风和自然通风直接空冷系统表现出了良好的小风经济性与大风安全性,非常适合在环境风条件恶劣地区采用.

Comparison between Ventilation Modes of Large Direct Air-Cooling System

In this paper, a new hybrid ventilation system is introduced to improve the performance of the direct air-cooling systems. Two 1 000-MW direct air-cooling units are taken as the example to compare the hybrid ventilation cooling system with the mechanical and natural ventilation direct air-cooling systems with numerical simulation method. The back pressure variation obtained under typical summer wind speed conditions indicates that the hybrid ventilation direct air-cooling system has better operational economy in light winds and better security performance in strong winds than the mechanical and natural ventilation direct air-cooling systems. Theretbre, it is very suitable for using in the areas of bad wind conditions.