Power Generating Performance of Photovoltaic Power System for Greenhouse Equipment Operation
2009
Yoon, Y.C., Gyeongsang National University, Jinju, Republic of Korea | Bae, Y.H., Gyeongsang National University, Jinju, Republic of Korea | Ryou, Y.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, S.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Suh, W.M., Gyeongsang National University, Jinju, Republic of Korea
For the purpose of reducing the cost for greenhouse operation by acquiring the electric power necessary for it, this study installed a solar photovoltaic system on the roof of the building adjacent to green-houses and experimentally examined the quantity of power generation based on weather conditions. The results of the study are as per the below: The maximum, average and minimum temperature while the experiment was conducted was 0.4~34.1, -6.1~22.2, and -14.1~16.7℃ respectively, and the solar radiation was 28.8MJㆍm-² (maximum), 14.9MJㆍm-² (average), and 0.6MJㆍm-² (minimum). The quantity of electric power didn't increase in proportion to the quantity of solar radiation and instead, it was almost consistent around 750W. Daily maximum, average and minimum consumption of electric power was 5.2kWh, 2.5kWh and 0kWh respectively. Based on the average electric power consumption of the system used for this experiment, it was sufficient in case the capacity and the working time of a hot blast heater are small, but it was short in case they are big. In case the capacity of the hot blast heater is big, the average electric power quantity will be sufficient for array area 21㎡, about three times of the present area. In summer when the temperature of the array becomes high, the generation of electric power didn't increase in proportion to the quantity of solar radiation, but this experiment result shows a high correlation between two factors (coefficient of correlation 0.84).
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