ช่วยหนูแปลภาษาอังกฤษด้วยค่ะ
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พอดีว่าบทความนี้ เป็นส่วนหนึ่งในวิทยานิพนธ์ค่ะ ลองแปลในกูเกิลแล้ว นำมาเรียบเรียง รู้สึกว่ามันยังไม่รู้เรื่องค่ะ ยังไงววอนผู้ใจบุญ ช่วยหนูแปลเพื่อเป็นวิทยาทานด้วยค่ะ ขอขอบคุณล่วงหน้าค่ะ
The principle and construction detail of an 8 m2 Scheffler reflector has been presented. The results have proved mathematically that it is possible to construct a concentrator that can provide fixed focus for all the days of the year. The slope and y-intercepts for the 8 m2 surface area Scheffler reflector with respect to equinox (solar declination = 0) are calculated to be 0.17 and 0 respectively. The slopes of the parabola equations for two extreme position of summer (solar declination = +23.5) and winter (solar declination = −23.5) in the northern hemisphere (standing reflectors) are calculated to be 0.28, and 0.13 respectively. The y-intercepts of the parabola curves for summer and winter are calculated to be 0.54, and −0.53 respectively. By comparing with the equinox parabola curve, the summer parabola is found to be smaller in size and uses the top part of the parabola curve, while the winter parabola is bigger in size and uses the lower part of a parabola curve to give the fixed focus. In conclusion, the parabola equations on June 21 and December 21 in the southern hemisphere are found to be the same as the parabola equations on December 21 and June 21 in the northern hemisphere respectively for the standing reflectors. In laying reflectors, the parabola equations for the northern hemisphere will be the same as the parabola equations for southern hemisphere (standing reflectors). Similarly, the parabola equations for laying reflectors in the southern hemisphere are the same as the parabola equations in the northern hemisphere for standing reflectors.
For this purpose, the reflector assembly is composed of flexible crossbars and a frame to induce the required change of parabola curves with the changing solar declination. The study also concludes that the concentrator is to be installed at the required site by setting its axis of rotation equal to the latitude of the site in northsouth directions to make the axis of the reflector paraboloid parallel to t he beam radiations. For daily tracking, these concentrators rotate along an axis parallel to the polar axis of the earth at an angular velocity of one revolution per day with the help of self-tracking devices. The seasonal tracking rotates the reflector at half the solar declination angle to induce the required change of the shape of the reflector paraboloid to track the sun at the fixed focus. The design procedure is simple, flexible and does not need any special computational setup, thus offering a huge potential for application in domestic as well as industrial configurations. These constructional and installation procedures are applicable all over the world.
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plubplueng_sa  
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12 มิ.ย. 55 09:40:16
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