Evaporative Cooling Efficiency of a Fogging System for Greenhouses
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摘要: The objective of this study was to investigate the efficiency fogging system (FS) for greenhouses. experiments were carried out in a multi-span plastic greenhouse (PG), 105.6 m wide and 205 long, made 11 spans. FS consists water softener filters prevent nozzle clogging, reservoir, pumps pressure regulator, fog generating nozzles (FGN). required FGN 4.5 atm. Three lines with 82 installed each span PG. At line, uniformly located at 2.5 spacing. parameters determined order characterize based on air flow rate (AFR) evaporation (EFR). results showed that able keep temperature inside PG 6.6 iC lower than outside. average ventilation 13.64 3 s -1 during experimental period. ranged from 11.7% 80%. increased as difference between dry-bulb (DBT) wet-bulb (WBT) rose. indicated relative humidity (RH) by 25% means examined study. EFR varied 130.3 g -2 h 1223.4 , while AFR 39.3 kg 298.7 . Fogging s›cakl›kta tutabilecei belirlenmifltir. Deneme suresince seradaki havaland›rma debisi ortalama olarak saptanm›flt›r. Sisleme sisteminin etkinlii % 11.7-80 aras›nda deiflmifltir. Sistemin etkinlii, havan›n kuru ve yafl termometre s›cakl›klar› aras›ndaki fark›na bal› artm›flt›r. sistemi, plastik sera icerisindeki hava ba¤›l nem oran›n› 25 oran›nda art›rm›flt›r. Serada taban alan› bafl›na ak›fl h›z› 39.3-298.7 deiflmesine karfl›l›k, buharlaflma miktar› 130.3- ic d›fl ortam havas›n›n mutlak dorusal
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