The paper describes the characteristic for three cylinder tandem compound four exhaust air-cooling condensing reheat turbine by DFSTW,the effect of air-cooling system application to steam turbine structure is analyzed as well as the measures taken in period of air-cooling steam turbine design.

On the basis of summary of sub-critical air-cooled unit construction, and combined with current super-critical air-cooled power plant construction, this paper brings forth the idea of standardization of air-cooled units, and the definition of air-cooled turbine power and determination of its back pressure.

Flow in last two stages of air-cooled steam turbines under varying load conditions is being studied with the help of numerical 3-dimensional viscous flow simulation methods.

Author analyzes the feasibility of improvement for air-cooled technologie s by introducing the cooling principles of air-cooled turbogenerator.

In this paper,the main technical features and key points of the design and manuf acture of WX21Z-073LLT 135MW high capacity air-cooled turbogenerator which mad e by ABB license in Jinan Power Equipment Factory were introduced,and the studies of the problem as such involves generator stator coils making process,rotator s haping process,and shaft balance etc.

The essay describes the DFSTW s exhaust equipment of direct air cooling turbine in which the round pipe has being used worldwide to replace the traditional square exhaust pipe.