A Controller Development Based on PLC for Climate Control of Agricultural Greenhouses

Wei Xiong Wu; Yun Zhao; Jie Qiang Zhao

doi:10.4028/www.scientific.net/AMM.336-338.1266

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 336-338A Controller Development Based on PLC for Climate...

A Controller Development Based on PLC for Climate Control of Agricultural Greenhouses

Abstract:

Forced ventilation has more accuracy in climate control of agricultural greenhouses. It is worthwhile to apply some energy saving measures to overcome the disadvantage of high power consumption in fan driving of forced ventilation. Here we present a new developed controller based on PLC which mainly can control the ventilation fans rotation speed in combination with variable frequency drive except for manipulating other facilities in greenhouse like pad, shading screen etc. The control system integrates a sense module which measuring solar radiation, temperature and humidity inside and outside of greenhouse, an actuating module which includes variable frequency drive, pad control and radiation screens to perform a optimized cooling strategy to reduce electrical energy consumption by low down the fans rotation speed with ambient condition changes.

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Periodical:

Applied Mechanics and Materials (Volumes 336-338)

Pages:

1266-1270

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.336-338.1266

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Online since:

July 2013

Authors:

Wei Xiong Wu, Yun Zhao, Jie Qiang Zhao

Keywords:

Greenhouse Temperature, Greenhouse Ventilation, Programmable Logic Controller (PLC), Variable Frequency Drives

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References

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