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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.14, no.2, 2005³â, pp.76-82
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CFD ±â¹ýÀ» ÀÌ¿ëÇÑ ÆÒ ¾Ø ÆÐµå ³Ã¹æ ¿Â½ÇÀÇ ¿Âµµ°æ»ç ºÐ¼®
( Analysis of Temperature Gradients in Greenhouse Equipped with Fan and Pad System by CFD Method ) |
| ³²»ó¿î;;±è±â¼º;; Ãæ³²´ëÇб³ ³ó¾÷»ý¸í°úÇдëÇÐ »ý¹°ÀÚ¿ø°øÇкÎ;Arizona´ëÇб³ ³ó¾÷ ¹× »ý¹°½Ã½ºÅÛ °øÇаú;Arizona´ëÇб³ ³ó¾÷ ¹× »ý¹°½Ã½ºÅÛ °øÇаú;Arizona´ëÇб³ ³ó¾÷ ¹× »ý¹°½Ã½ºÅÛ °øÇаú;
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| ÆÒ ¾Ø ÆÐµå ½Ã½ºÅÛÀº ±¹³»¿ÜÀûÀ¸·Î ¿Â½Ç³Ã¹æ¿¡¼ ¸¹ÀÌ ÀÌ¿ëµÇ°í ÀÖÀ¸¸ç, ±× È¿À²µµ ¸Å¿ì ³ôÁö¸¸ ¿Â½Ç ³»ºÎÀÇ ¿ÂµµºÐÆ÷°¡ ºÒ±ÕÀÏÇÏ°í ¼³Ä¡ºñ¿Í À¯Áöºñ°¡ ¸¹À̵å´Â ´ÜÁ¡ÀÌ ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ÆÒ ¾Ø ÆÐµå ½Ã½ºÅÛÀÇ ¼³°è¸¦ À§ÇÑ ÀڷḦ Á¦°øÇÒ ¸ñÀûÀ¸·Î ÆÒ ¾Ø ÆÐµå½Ã½ºÅÛ ¼³Ä¡¿Â½ÇÀÇ ¿ÂµµºÐÆ÷¸¦ ¿¹ÃøÇϱâ À§ÇÑ CFD ¸ðµ¨À» °³¹ßÇÏ¿´´Ù. °³¹ßµÈ ¸ðµ¨Àº ½ÇÇè µ¥ÀÌÅ͸¦ ÀÌ¿ëÇÏ¿© °ËÁõÇÑ °á°ú ½ÇÇèÄ¡¿Í ¿¹ÃøÄ¡°¡ Àß ÀÏÄ¡ÇÏ¿© ¸ðµ¨ÀÇ ÀÀ¿ëÀÌ °¡´ÉÇÒ °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù. °³¹ßµÈ ¸ðµ¨À» ÀÌ¿ëÇÏ¿© ¿Â½Ç ¿ÜºÎÀÇ Ç³¼Ó°ú dzÇâ, ÆÒ°ú ÆÐµåÀÇ ³ôÀÌ, ȯ±âÀ²¿¡ µû¸¥ ½Ç³»À¯¼Ó, Â÷±¤À² ¹× ¿Â½ÇÀÇ ±æÀ̰¡ ÆÒ ¾Ø ÆÐµå ³Ã¹æ¿Â½ÇÀÇ ½Ç³» ¿Âµµ°æ»ç¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» °ËÅäÇÏ¿´´Ù. ½Ç³» ¿Âµµ°æ»ç¸¦ °¨¼Ò½Ã۱â À§ÇÏ¿©´Â ¿Â½Ç ¼³Ä¡ Áö¿ªÀÇ ÁÖdzÇâÀ» °í·ÁÇÏ°í ÆÒ°ú ÆÐµåÀÇ ³ôÀ̰¡ ÀûÀýÇØ¾ß ÇÒ °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù. ½Ã¹Ä·¹ÀÌ¼Ç °á°ú ³ôÀº ȯ±âÀ²°ú Â÷±¤À²Àº ÆÒ ¾Ø ÆÐµå ³Ã¹æ ¿Â½ÇÀÇ ¿Âµµ°æ»ç¸¦ °¨¼Ò½Ã۴µ¥ ±â¿©ÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÆÒ ¾Ø ÆÐµå ³Ã¹æ ¿Â½ÇÀÇ ¿Âµµ¸¦ ÀûÁ¤ ¼öÁØÀ¸·Î À¯Áö½Ã۱â À§Çؼ´Â ¿ÜºÎ±â»óÁ¶°Ç, Â÷±¤ ¹× ȯ±âÀ²¿¡ µû¶ó ¿Â½ÇÀÇ ±æÀ̸¦ Á¦ÇÑÇØ¾ß ÇÒ °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù. °³¹ßµÈ CFD¸ðµ¨Àº ´Ù¾çÇÑ Á¶°Ç¿¡¼ ÆÒ ¾Ø ÆÐµå ³Ã¹æ¿Â½ÇÀÇ ¼³°è¿Í Æò°¡¿¡ À¯¿ëÇÑ µµ±¸°¡ µÉ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. |
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| Evaporative cooling pad system is one of the main cooling methods in greenhouses and its efficiency is very high. However, it has some disadvantages such as greenhouse temperature distributions are not uniform and installation cost is expensive. In this study, a CFD simulation model f3r predicting the air temperature distribution in the fan and fad cooling greenhouse was developed. The model was calibrated and validated against experimental data and a good fit was obtained. The influence of different outside wind, fan and pad height, ventilation rate, shading, and greenhouse length, were then examined. In order to reduce the internal temperature gradients, it is desired that the prevail wind direction and the fan and pad heights are considered. The simulation indicates that high ventilation rates and shading contribute to reduce the temperature gradients in the fan and pad cooling greenhouse. In order to maintain the desired greenhouse temperature, the pad-to-fan distance should be restricted according to the design climate conditions, shading and ventilation rates. The developed CFD model can be a useful tool to evaluate and design the fan and pad systems in the greenhouses with various configurations. |
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| ¿Âµµ°æ»ç;¿Â½Ç³Ã¹æ;ÆÒ ¾Ø ÆÐµå ½Ã½ºÅÛ;CFD ½Ã¹Ä·¹À̼Ç;CFD simulation;fan and pad system;greenhouse cooling;temperature gradients; |
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»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.14, no.2, 2005³â, pp.76-82
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200504704007109)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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