Abstract: Based on the relevant observational data in January and February of 2003,the condensation,heat storage and dehumidification effects of air-circulating and regenerative dehumidification system inside greenhouse in the Southern China were studied. The results showed that the daily mean condensation water inside the condensation greenhouse on the sunshine days in January of 2003 amounted to 7681cm3/day,which was equivalent to 32g/m2 greenhouse area and 12.1g/m3 greenhouse volume. The daily mean vaporization heat absorption of condensed water was 18858 kJ. On a typical sunshine day,the daily average relative humidity on the lower level,middle level,upper level inside the condensation greenhouse were 2.7%,3.5% and 2.6% lower than that inside the control greenhouse respectively,while the daily average absolute humidity on the lower level,middle level,upper level inside the condensation greenhouse were 2.7g/m3,4.1g/m3,4.5g/m3 lower respectively. In January,both relative humidity and absolute humidity on the same level on the same day inside the condensation greenhouse were lower than that inside the control greenhouse,but it was different from the sunshine days,and it was smaller on the rainy and cloudy days. In short,condensation,heat storage and dehumidification effects of air-circulating and regenerative dehumidification system inside greenhouse in the Southern China were significant.

Key words: Greenhouse in the Southern China, Greenhouse in the Southern China, Air-circulating and Regenerative Dehumidification System, Condensation, Heat storage, Dehumidification