Numerical Simulation Research On Water Side Of Condenser In 1000MW Unit

As present,condenser as essential equipments for power plant,on condition of resource lack,structure optimization is significant in the energy efficiency.By substituting porous media for millions of cooling pipe,and by SIMPLE algorithm and k-? turbulence model,software of Fluent is used to simulate and analyze the inner flow field of 1000 MW condenser,then two optimized retrofit schemes are developed.The first solution is that bafflers should be added in circulating pipe.Calculation results show that,after adding reasonable bafflers,tube bundle area had no effect on the low voltage side,and high side bundle area average flow velocity increase 0.017m/s,the average heat transfer coefficient increased 11.15W/(m2·K),effectively improve the condenser cooling water flow rate,increasing the average heat transfer coefficient..The other solution is that the structure of condenser water chamber should be transformed.Calculation results show that,water chamber structure adjustment control area velocity have certain to improve,but more and more embodied in the aspect of reducing the pressure drop,low voltage side pressure loss of the condenser,on average 93.77 Pa,reduced the high side pressure loss of the condenser average reduced164.1Pa,are of great help to the improvement of the condenser vacuum.Besides,adding the influence factor of heat transfer between steam and water for accuracy and reality for these calculations.Research for the influence which heat transfer between steam and water to cooling water.Calculation results show that,change of temperature of cooling water has little impact to velocity and pressure,that can be ignored when the imprecise calculation.