کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1712716 | 1013155 | 2006 | 5 صفحه PDF | دانلود رایگان |
During operation of a fog system for greenhouse cooling, fog wafts in the air inside the greenhouse. If the fog adheres to a sensing part of a thermometer, such as a junction of a thermocouple, measurement of dry-bulb temperature decreases and sometimes reaches a wet-bulb temperature while the fog evaporates. In this study, the use of a non-aspirated thermocouple in a column-shaped shelter with a flat roof was examined to determine the dry-bulb temperature in a greenhouse equipped with the fog system. The results indicated that a combination use of the shelter and an empirical correction for eliminating radiation effects provided the most accurate determination of the dry-bulb temperature during the operation of the fog system. Owing to the fog adherence to a junction of a thermocouple in an aspirated psychrometer or a bare thermocouple without the shelter, its measurement was significantly lower than the actual dry-bulb temperature during the operation of the fog system.
Journal: Biosystems Engineering - Volume 93, Issue 3, March 2006, Pages 347–351