Numerical simulation study on self-balanced ventilation and heating scheme of turbine house in cold area

Abstract:

A large number of radiating facilities in turbine house cause tremendous afterheat gathering at the top of the house. While existed studies focus more on afterheat removal in summer, much less has been studied about the afterheat recovery in winter. In order to verify the feasibility of this self-balanced heating scheme in turbine house, CFD simulation was used to analyze it. A geometric model was set up according to actual spatial structure of the turbine house, and calculation was fulfilled with structural mesh. Two presetting heating schemes were compared and the optimized scheme that used airflow of jet tuyere instead of direct jet flow was proposed. The results indicated that the self-balanced heating scheme could meet the heating requirements and reduce the number of radiators; ventilation quantity of scheme 2 was better considering the efficiency of energy saving and heating. In addition, the airflow of jet tuyere was superior to that of direct jet flow, and it also improved the air distribution of the working layer, thereby achieving better heating effect. This paper provides a useful reference for heating design of large plants in cold area from the perspective of waste heat utilization.