| Popis: |
This research aims a study to compare the thermal efficiency of the original and improvement salt boiling stove by using a mathematical model by computational fluid dynamics (CFD) of the boiling salt process in Ban Dung area, Udon Thani province. This study aimed to compare the thermal efficiency between the original stove and the develop stove, has installed the panels (baffles) that retained heat inside the channel of burning stove. The first study, the original stove has U-shaped channel for heating flow through chimney. The original stove size is 2.4 m of width, 6.0 m of long, 0.8 m of high and cross-sectional area of heating flue was 0.8 x 0.8 m2. The heating flue can be flow through to the space which not installed the panels of U-shaped channel. The second study, the improvement salt boiling stove has a similarly size of the original stove but installed the baffles. The baffles retained heat inside the channel stove which length of 0.2 m and the baffle panel installed every 1.0 m in a zigzag form along of the channel stove. From the experiment of original stove which the fuel was firewood, the average fired temperature is 1,000°C and the average velocity of hot air in the chimney is 0.6 m/s. From the results of mathematical models by CFD found that the original stove have the thermal efficiency, the highest fired temperature and the velocity outlet of hot air of 17.78%, 537.77°C and 4.86 m/s, respectively. Then, the improvements stove have 28.43%, 919.16°C and 2.80 m/s, respectively. it can be calculated the amount of firewood used as fuel to boiled salt that can be reduced to 557.85 kg and calculate cost for boiled salt reduce is 475 baht per one round boiling salt which can reduce the cost of boiling salt production is 37.19%. Comparison between the original and improvement salt boiling stove found that the improvement stove have the thermal efficiency and heating flue more than original stove because the improvement stove have install the baffles retained heat through slowly inside the stove. |
