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Articles by Singthong Pattanasethanon
Total Records ( 2 ) for Singthong Pattanasethanon
  Singthong Pattanasethanon
  Problem statement: An optimal control on two axes and design for solar tracker which called altitude and azimuth is challenge. Approach: The phototransistor with the shade that blocks the screen was employed as a detector of solar beam radiation. The height of the screen determined the sensitivity operation or period of tracking in this solar tracker. The phototransistor is particularly designed to detect solar bean radiation thoroughly through the two axes with the operating time. The mechanism of this solar tracker is that it has a capacity of solar tracking in every 10 min, approximately, which respond in terms of time at about 37° sec-1 with and operating point at 0.3 sec. Results: Our solar tracker obtained an average deviation at about 2.5° h-1. In weak sunlight however, the value varies and fluctuates rapidly depending on sky condition. Conclusion: The accuracy of solar position tracking function satisfied our goal as well. There is only average of 2.5° error shown. The experiment also shows that the error rate diminishes as the solar radiance expand. However, we hope to develop this device to be more exact in the position.
  Sopa Cansee , Adisak Pattiya , Singthong Pattanasethanon and Worraphan Sombuttera
  Problem statement: The receiver of parabolic dual trough had been designed and built in order to increase efficiency of solar radiation accumulation by using iron-aluminum sheet as an intermediate in receiving heat and it is the study into how to benefit from solar radiation energy. This research proposed the principle of changing solar radiation to be heating energy by using aluminum sheet made into dual parabolic curve tilted with iron-aluminum sheet which was receiver of radiation reflection. Approach: This dual parabolic curve could be adjusted so that heat obtained from the solar radiation accumulation, which was the focus, could spread around iron-aluminum sheet. In testing of heating by solar energy, the unit would be tilted at 16° to the North-South in order to receive solar radiation and the unit was arranged horizontally. The test was classified into 4 conditions including (1) laying the unit horizontally and un-drive the motor, iron-aluminum sheet would be put in place unmoved in vertical line; (2) laying the unit horizontally and drive motor so that iron-aluminum sheet could be moved upwards and downwards along the vertical line; (3) laying the unit to be tilted at 16° with plane level and un-drive motor and (4) laying the unit to be tilted at 16° with the plane level and drive motor so that iron-aluminum sheet could be moved upwards and downwards along the vertical line. Results: It was found from the test of temperature of iron-aluminum sheet that on the first condition, the highest temperature of iron sheet was 75.2°C and the highest temperature of aluminum was 84.7 °C; on the second condition, the highest temperature of iron sheet was 90.6°C and the highest temperature of aluminum was 97.2°C; on the third condition, the highest temperature of iron sheet was 87.4°C and the highest temperature of aluminum was 93.4°C; on the fourth condition, the highest temperature of iron sheet was 94.5°C and the highest temperature of aluminum was 89.4°C. Therefore, the test of laying the unit to be tilted at 16° with the plane level and driving motor leaded to the high temperature since the perpendicular of light and the spreading of sunlight from dual parabolic curve could cover all area. Conclusion: These results indicate dual parabolic curve could be increased efficiency of solar radiation accumulation by using iron-aluminum sheet as an intermediate in receiving heat.
 
 
 
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