Experimental Study on Temperature Control and Energy Saving of Reinforced Concrete Silo by Radiative Cooling Technology

In this paper, we implemented a radiative cooling (RC) coating with excellent spectrum selective characteristics on the roof of a reinforced concrete silo. By conducting temperature-regulated grain storage experiments using RC in regions with prolonged exposure to sunlight, we aimed to investigate efficient and energy-conserving methods of temperature control. The experiment results show that: the experimental silo was lower than the two control silos, compared with two control silos, the average air temperature of the experimental silo is 1.63 ℃ and 1.27 ℃ lower respectively, and the highest silo air temperature was lower than 2.5 ℃; the average grain surface temperature is lower than the two control silos by 1.37 ℃ and 1.02 ℃, respectively, and the highest value of grain surface temperature is lower than 2 ℃. By applying RC coating to the roof of reinforced concrete silo, the temperature of the silo can be effectively lowered during the summer, alleviating the problem of heat on the grain surface. The predicted energy consumption results show a 55.56% savings in annual summer energy consumption compared to grain silo without the application of RC coating for temperature control.