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Concerning with the environmental pollution and energy crisis, a solar energy fresh air heating system coupled with the Latent Heat Thermal Storage (LHTS) tank was developed, in which solar energy was used as heat supply source, and the heat storage material was also employed as the solar energy has intermittent and instability characteristics. In this paper, the operating principle of the solar energy fresh air system was firstly analyzed and the overall control objectives was then proposed; secondly, three operation mode was determined from the point of view of simulating the solar operating conditions. In order to make effective use of solar energy maximizing the utilization ratio, the mode switching control scheme was finally designed according to the mode conversion evidence.

Operation Mode and Switching Control Design for a Solar Energy Fresh Air System