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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.5, 2002³â, pp.209-220
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ÁöÁß¼ÛÀü°ü·Î µÇ¸Þ¿òÀçÀÇ ¿ÀúÇ× Æ¯¼º
( Thermal Resistivity of Backfill Materials for Underground Power Cables ) |
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| ÁöÁß¼ÛÀüÄÉÀ̺íÀÇ ¼ÛÀü¿ë·®Àº ÄÉÀÌºí ¶Ç´Â ÁÖº¯Áö¹ÝÀÇ ÃÖ´ëÇã¿ë¿Âµµ¿¡ Á¿ìµÇ±â ¶§¹®¿¡ ÄÉÀ̺í ÁÖÀ§ µÇ¸Þ¿òÀç´Â ¿î¿µ±â°£µ¿¾È ³·Àº ¿ÀúÇ×¼ºÀ» À¯ÁöÇÏ¿©¾ß ÇÑ´Ù. ÄÉÀ̺í ÁÖÀ§¿¡ ¹ß»ýµÈ ¿Àº µÇ¸Þ¿òÀ縦 ÅëÇØ Áï½Ã ÁÖÀ§¿¡ ¹ß»ê½ÃÄÑ Á¦°ÅÇÏ¿©¾ß Çϸç, ±×·¸Áö ¾ÊÀ¸¸é Åë»ó¿Âµµ (50~6$0^{circ}C$)¿¡¼µµ ¿ÆøÁÖ¿¡ ÀÇÇÑ Àý¿¬ÆÄ±«¿¡ À̸¦ ¼ö ÀÖ´Ù. º» ³í¹®¿¡¼´Â µÇ¸Þ¿òÀçÀÇ ¿ÀúÇ×À» ³·Ãß±â À§ÇÑ ¿©·¯ °¡Áö ¹æ¹ý¿¡ ´ëÇØ ³íÇÏ¿´À¸¸ç, ´Ù¾çÇÑ Ã·°¡Á¦¸¦ »ç¿ëÇÏ¿© ½ÃÇèÀ» ¼öÇàÇÔÀ¸·Î½á ¿ÀúÇ× È¿°ú¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¿¬±¸°á°ú, ¿µ±¤ µ¿¸²Ãµ ¸ð·¡ÀÇ °æ¿ì »ó´ëÀûÀ¸·Î ±ÕµîÇÑ ÀÔµµºÐÆ÷¸¦ ³ªÅ¸³»´Â ¸ð·¡·Î½á´ë´ÜÈ÷ ³ôÀº ¿ÀúÇ×Ä¡(5$0^{circ}C$'-cm/watt at 10% ÇÔ¼öºñ, 260-cm/watt °ÇÁ¶ ½Ã)¸¦ ³ªÅ¸³Â´Ù. ¶ÇÇÑ Áø»ê Ȱ¾Ï ¼®ºÐ ¹×¸ð·¡½Î°¥(A-2), ¼®ºÐ¼â¼® È¥ÇÕÀç(E-1)ÀÇ °æ¿ì ¾çÈ£ÇÑ ÀÔµµ¿Í ³·Àº ¿ÀúÇ×(35$^{circ}C$-cm/wau 10% ÇÔ¼öºñ, 10$0^{circ}C$-cm/watt °ÇÁ¶½Ã)À» º¸¿©ÁÖ¾úÀ¸¸ç, ÀÌµé ¿¬±¸°á°ú¸¦ Åä´ë·Î ¿ÀúÇ×ÀÌ ³·Àº 3°¡Áö ÇüÅÂÀÇ µÇ¸Þ¿òÀ縦 Á¦½ÃÇÏ¿´´Ù. |
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| Because the allowable current loading of buried electrical transmission cables is frequently limited by the maximum permissible temperature of the cable or of the surrounding ground, there is a need for cable backfill materials that can maintain a low thermal resistivity (less than 5$0^{circ}C$-cm/watt) even while they are subjected to high temperatures for prolonged periods. Temperatures greater than 5$0^{circ}C$ to 6$0^{circ}C$ may lead to breakdown of cable insulation and thermal nlnaway if the surrounding backfill material is unable to dissipate the heat as rapidly as it is generated. This paper describes the results of studies aiming at the development of backfill material to reduce the thermal resistivity. A large number of different additive materials were tested to determine their applicability as a substitute material. Tests were called out for DonUing river sand, a relatively uniffrm sand of very high thermal resistivity (5$0^{circ}C$ -cnuwatt at 10% water content, 26$0^{circ}C$-cm/watt when dry), and Jinsan granite screenings, and A-2(sand and gravel mixture), E-1 (rubble and granite screenings mixture), a well-graded materials with low thermal resistivity (about 35$^{circ}C$ -cm/watt when at 10 percent water content, 10$0^{circ}C$-cm/watt when dry). Based on this research, 3 types of backfill materials were suggested for improved materials with low thermal resistivity. |
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| Ű¿öµå |
| Backfill materials;Thermal resistivity;Underground power cables; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.5, 2002³â, pp.209-220
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921407882)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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