Abstract
The greenhouse heating system with far-infrared heater was built to analyze various thermal characteristics, such as greenhouse air temperature, soil temperature, energy flow, energy consumption in far-infrared heater, and other factors, which could be used in comparison with other greenhouse heating system in this study. The results showed that the inside air temperature of the far-infrared greenhouse heating system was <TEX>$5^{\circ}C$</TEX> higher than that of hot air heating system. Heat loss of daytime was found to be larger than that of night time as much as 44.8% for the heating system with far-infrared heater. In the heating system with far-Infrared heater, when the lowest ambient temperature was -8 <TEX>$\sim$</TEX> -7<TEX>$^{\circ}C$</TEX>, the air temperature of greenhouse was 12 <TEX>$\sim$</TEX> 15<TEX>$^{\circ}C$</TEX>, thus the far-infrared heating system was shown to be feasible for heating system. Energy consumption of far-infrared heating system was shown to be less than that of hot air heating system.
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