Abstract

Info

Title:: Effect of Water Pipe Accumulation of Heat on Thermal Environment of Solar Greenhouse

Author(s):: WU Rilige1; CUI Shimao1; SONG Yang1; 2; YE Lihong1; SUN Shijun1; XUE Yanjun1; TAO Li1; (1.College of Agronomy,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010019;2.Inner Mongolia Fashncd Biotechnology Co.Ltd.,Baotou,Inner Mongolia 014030)

Keywords:: greenhouse; heat storage pipe; wall; heat storage; solar greenhouse

Abstract:: In this study,the inner thermal insulation greenhouse was studied in Baotou Academy of Agriculture and Animal Husbandry and Sciences,and 28 water pipes with diameter of 0.1 m,height of 3.0 m and spacing of 0.4 m were installed in the back wall (37 walls) of solar greenhouse.The total volume of 0.66 m3.The influence of water pipe accumulation of heat on thermal environment of solar greenhouse was analyzed,in order to enhance solar thermal efficiency and improve the thermal environment of solar greenhouse,and reduce the construction of solar greenhouse wall costs.The results showed that the installed capacity of the installed heat storage unit was 73.8 MJ·m-3.After installing the heat storage water pipe,the heat storage capacity of the rear wall of the solar water storage tank increased by 69.6 MJ·m-3；compared with the control greenhouse,installing heat storage water pipes,the day and night temperature difference of the rear wall was 0 cm,10 cm and 20 cm away from the inner surface decreased respectively 3.8 ℃，1.9 ℃，1.0 ℃.Installing heat storage water pipes in solar greenhouse,the average daily minimum air temperature was increased by 0.7-2.4 ℃,the average daily ground temperature was increased by 0.2-2.0 ℃,the average ground temperature at night was increased 0.4-2.3 ℃.Installing heat storage water pipes significantly could improve the thermal environment in the greenhouse and increase the solar thermal efficiency of the solar greenhouse.