Performance evaluation of a small backyard hydroponics greenhouse using automatic evaporative cooling system

12th TSAE International Conference

Chamroon, C.^1 ; Aungkurabrut, R.^1

Mechanical Engineering Department, School of Engineering, University of Phayao, Phayao, Thailand^1

关键词: Automatic feeding;    Automatic systems;    Control performance indices;    Conventional cultivations;    Nutrient solution;    Payback periods;    Renewable electricity;    Statistical significance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/301/1/012024/pdf
DOI  :  10.1088/1755-1315/301/1/012024

来源: IOP

【 摘 要 】

This work studied the automatic greenhouse evaporative cooling system in hydroponics for household. The objectives of this study were to design the automatic feeding nutrient solution system and determine the performance of automated greenhouse evaporative cooling system for a small backyard. The microcontroller (Arduino Uno R3) was used in both systems and the dimensions were the same design as a 1 m of width, 2 m of length and 1.75 m of height especially for household. In the study, the conventional cultivation hydroponics had been constructed in parallel to be a reference of a study. The results show that the automatic feeding nutrient solution system (AFNSS) can precisely control the flow rate at 6±2% LPM. In addition, the automated greenhouse evaporative cooling system (AGECS) also effectively maintains the planting conditions for hydroponics and the control performance index (J) is 0.14 when setting temperature at 29.0±1°C. Finally, the lettuce production in AGECS gives the statistical significance at 0.05 and payback period of this system is 3.3 years. For this design, the automatic system is simple to control and reliable, more productive, and not dependent on seasons, as well as renewable electricity sources, then, it is practical for home vegetable gardeners.