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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.10, no.1, 2001³â, pp.10-14
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( The Cooling Effect of Fog Cooling System as Affected by Air Exchange Rate in Natural Ventilation Greenhouse ) |
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| Æ÷±×³Ã¹æ½Ã½ºÅÛÀÇ ³Ã¹æÈ¿°ú´Â ¿Â½Ç ³»ºÎÀÇ »ó´ë½Àµµ, °ø±âÀ¯µ¿°ú ¹ÐÁ¢ÇÑ °ü°è°¡ ÀÖ´Ù. ³Ã¹æ¼³°è¿ë VETH¼±µµ¿¡¼ ³Ã¹ßÈ¿À²Àº ȯ±âȸ¼öÀÇ Áõ°¡¿Í ±×¿¡ »óÀÀÇÏ´Â ºÐ¹«¼ö·®ÀÇ Áõ°¡·Î ÀÎÇÏ¿© °³¼±µÉ ¼ö ÀÖ´Ù. ½Ã°£Á¦¾î¹æ½ÄÀ» ÀÌ¿ëÇÑ ¹«Â÷±¤ ½ÇÇè¿Â½Ç¿¡¼ ºÐ´ç ȯ±âȸ¼ö°¡ Æò±Õ 0.77ȸ, ºÐ¹«¼ö·®ÀÌ 2,009g ÀÏ ¶§ ¿Â½Ç ³»ºÎÀÇ ±â¿ÂÀÌ 31$^{circ}C$·Î ¿ÜºÎ±â¿Â°ú °ÅÀÇ °°°Ô ³ªÅ¸³µÀ¸¸ç, ÀÌ ¶§ÀÇ Áõ¹ßÈ¿À²Àº 82%ÀÌ´Ù. ºÐ´ç ȯ±âȸ¼ö°¡ Æò±Õ 0.26ȸ, ºÐ¹«¼ö·®ÀÌ 1.256gÀÎ °æ¿ì ¹«³Ã¹æ ¿Â½ÇÀÇ ±â¿Â°ú ºñ½ÁÇÑ 37.1$^{circ}C$¿´´Ù. Â÷±¤À² 70%ÀÎ ½ÇÇè¿Â½ÇÀÇ ºÐ´ç ȯ±âȯ¼ö°¡ Æò±Õ 2.59ȸ, ºÐ¹«¼ö·®ÀÌ 2,009g ÀÏ ¶§, ³»ºÎÀÇ »ó´ë½Àµµ´Â Áõ°¡Çϳª ±â¿ÂÀº ÇϰÇÏÁö ¸øÇß´Ù. ±×·¯³ª ºÐ´ç ȯ±âȸ¼ö°¡ Æò±Õ 2.33ȸ, ºÐ¹«¼ö·®ÀÌ 2,009gÀÎ °æ¿ì ³»ºÎÀÇ ±â¿ÂÀÌ 31.4$^{circ}C$·Î ÀÌ ¶§ ¿Â½ÇÀÇ À¯ÀÔ±¸ dz¼ÓÀº ÃÖ°í 1.9m.s$^{-1}$¿´´Ù. ½Ã°£Á¦¾îÀÇ °æ¿ì ÀÏÁ¤°£°ÝÀ¸·Î ÀÏÁ¤ÇÑ ¼ö·®À» ºÐ¹«Çϱ⠶§¹®¿¡ ºÐ¹«ÀÔÀÚ°¡ ¸ðµÎ Áõ¹ßÇÏÁö ¸øÇÏ°í ¿Â½Ç ³»ºÎ¿¡ ´©ÀûµÇ¾î ¿Â½Ç ³»ºÎÀÇ »ó´ë½Àµµ¸¦ Áõ°¡½ÃÄÑ ³Ã¹æÈ¿À²À» °¨¼Ò ½ÃŰ´Â ¿øÀÎÀÌ µÇ°í Â÷±¤¸ÁÀÌ ¿Â½Ç³»ºÎÀÇ °ø±âÈ帧À» Â÷´ÜÇÏ¿© Áõ¹ßÈ¿À²À» °¨¼Ò½ÃŰ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Æ÷±×³Ã¹æ½Ã½ºÅÛÀÇ ³Ã¹æÈ¿À²À» ³ôÀ̱â À§Çؼ´Â ¿Â½Ç ³»ºÎÀÇ »ó´ë½Àµµ¿¡ ÀÇÇÑ Á¦¾î¹æ½Ä°ú ³»ºÎ °ø±âÀÇ ¼øÈ¯¿¡ ´ëÇÑ ¿¬±¸°¡ ÇÊ¿äÇÏ´Ù. |
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| The cooling effect of a fog cooling system has a close relationship to air flow and relative humidity in the greenhouse. From the VETH chart for cooling design, a cooling efficiency can be improved by means of increasing the air exchange rate and the amount of sprayed water. In the no shading experimental greenhouse by time control, when average air exchange rate was 0.77 times.min$^{-1}$ and spray water amount was 2,009g, inside temperature of the greenhouse was 31$^{circ}C$ that was almost close to outside temperature and cooling efficiency was 82%. When average air exchange rate was close to temperature of the greenhouse that was no cooling and 70% shading greenhouse environment. When average air exchange rate was 2.59times.min$^{-1}$ , spray water amount was 2,009g and shading rate was 70%, inside relative humidity of the greenhouse was increased was 2,009 g and shading rate was 70%, inside relative humidity of the greenhouse was increased, but temperature was not decreased. When average air exchange rate was 2.33 times.min$^{-1}$ and spray water amount was 2,009g, inside temperature was 31.4 and at that time maximum wind speed at the air inlet of greenhouse was 1.9m.s$^{-1}$ . Since time controller sprayed amount of constant water at a given interval, some of sprayed water remained not to be evaporated, which increased relative humidity and decreased cooling efficiency. Because the shading screen prevented air flow in the greenhouse, it also caused the evaporation efficiency to be decreased. In order to increase cooling efficiency, it was necessary to study on controling by relative humidity and air circulation in the greenhouse. |
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| Æ÷±×³Ã¹æ½Ã½ºÅÛ;ȯ±âȸ¼ö;ÀÚ¿¬È¯±â¿Â½Ç;¿È¯°æ;fog cooling system;air exchange rate;natural ventilation greenhouse;thermal environment; |
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»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.10, no.1, 2001³â, pp.10-14
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920845720)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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