The Study of Fog and Fan cooling system with Turbulent Fan on Opened-Type Greenhouse
碩士 === 國立中興大學 === 農業機械工程學系 === 90 === Open-type greenhouse that ventilator covered with insect screen with turbulent-fan and fixed fine fogging nozzle studed for evaporative cooling. We maked VETH chart by using local micro-climate in the study, and use it to calculate the quantities of nozzles、natu...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2002
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| Online Access: | http://ndltd.ncl.edu.tw/handle/79077206508190364011 |
| Summary: | 碩士 === 國立中興大學 === 農業機械工程學系 === 90 === Open-type greenhouse that ventilator covered with insect screen with turbulent-fan and fixed fine fogging nozzle studed for evaporative cooling. We maked VETH chart by using local micro-climate in the study, and use it to calculate the quantities of nozzles、natural ventilative rate and evaporative rate within the experiment.
The ventilation test showed increasing ventilative rate by using turbulent-fan. The test in drift of particle showed that we can increase the effect of drift by using turbulent-fan. The result of temperature reduction test showed no effect in temperature reducing in horizontal spraying. The average temperature reduction compare with outside and natural ventilation after changing the degree of nozzle in fogging individually. It can reduce 0.8℃、2.7℃ individually.
Result of evaporative fraction show about 60% and 85% for turning off and on turbulent-fan. It can increase evaporative fraction by using turbulent-fan.
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