The objective of the project was to verify the hot water generator design by ensuring that the operation conditions are met based on actual experimental results of combustion, heat transfer and fluid flow through the combustion chamber and pipes. CFD Analysis was done to simulate the combustion and flow of hot flue gases through the combustion chamber, hot water generator and economizer till the exhaust and to calculate the temperature of water passing through the heat exchanger pipes as it comes out of the water outlet. Suggestions were given based on the simulation result to enhance turbulence in the fluid flowing inside the tube.
After the analysis was done it was verified that the operating conditions of the hot water generator was similar to the actual experimental results of combustion, heat transfer and fluid flow through the combustion chamber and pipes. The total volume flow rate of water entering the hot water generator is 900 GPM. The economizer is designed to ensure that the water enters the inlet drums located at the bottom of the hot water generator at 1600F ñ 1800F. The temperature in the core combusting region is high and progressively reduces through the heat exchange region as it is carried away by the water and the flue gases. The positions of the baffles were clearly understood from the flow.
1) CFD Simulation of Coal Combustion in a Pulverised Coal Fired Boiler
2) Flue Gas temperatures
3) Tube Metal temperature calculation for re-heater in the boiler using Thermal resistance concept
4) Modelling of non-reacting air flow is done by two steps:
i) Cold air flow model simulation
ii) Hot air flow model simulation
5) Radiation modelling to study the significant drop in the temperature
6) Study of whirl formation at the burner zone
7) Verification of hot water generator using CFD Simulation
8) Heat Transfer, Combustion and Fluid flow through combustion chamber and pipes
9) Simulation of Combustion and Hot flue gases through combustion chamber, Hot water generator and economizer till the exhaust
10) To calculate the temperature of water passing through heat exchanger pipes as it comes out of the water outlet
11) To enhance the turbulence in the fluid flowing inside the tube
12) Comparison of CFD Study with the Practical results