汽机房余热回收供热系统适用范围分析

Analysis of Applicable Range of Waste Heat Recovery Heating System in Turbine House

在严寒和寒冷地区,利用汽机房屋顶风机反转,将汽机房设备的散热用于供暖,实现自平衡通风供暖过程,以回收汽机房的部分冬季余热。为了探究该余热回收供暖方式的适用性,本文将利用CFD分别对不同规格和不同地区的汽机房进行自平衡通风模拟,通过对汽机房温度场和速度场的分析给出自平衡供暖方式适用范围。结果表明:以本文所选汽机房为例,1 000 MW、600 MW规格的汽机房可以采用自平衡通风供暖系统为主的供暖方式;室外温度低于-20℃时,汽机房室内平均温度将低于5℃,不宜采用自平衡供暖方式。

In extreme cold and cold areas, the roof fan of the turbine house can be reversed, and the heat dissipation of the equipment at the turbine house can be used for heating to realize the self-balanced ventilation heating process, so as to recover part of the winter waste heat of turbine house. The applicability of the waste heat recovery heating mode is positively correlated with the specifications of the turbine house and the meteorological parameters in the area. In this paper, the CFD simulation is used to analyze the airflow organization of the turbine house in the above situation, and the corresponding scope of application is given. The results show that: taking the turbine house selected in this paper as an example, the turbine house of 1 000 MW and 600 MW specifications can adopt self-balanced ventilation heating system as the main heating mode. When the outdoor temperature is lower than-20℃,the average indoor temperature of the turbine house will be lower than 5℃,so it is not suitable to adopt self-balanced ventilation heating mode.