|Table of Contents|

Determination and Analysis on Heat of Trapezoidal  Soil Wall in Solar Greenhouse(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年07
Page:
58-64
Research Field:
Publishing date:

Info

Title:
Determination and Analysis on Heat of Trapezoidal  Soil Wall in Solar Greenhouse
Author(s):
BAI Qing1; 2; ZHANG Yahong1; FENG Meiqi1; JIANG Li1
(1.School of Agriculture,Ningxia University,Yinchuan,Ningxia 750021；2.Ningxia Institutie of Technology for Development and Information Study,Yinchuan,Ningxia 750001)
Keywords:
solar greenhouse; soil wall; heat
PACS:
-
DOI:
10.11937/bfyy.201707014
Abstract:
Solar greenhouse with trapezoidal soil wall is widely used due to its good heat retaining property and cost efficiency.In this study,solar irradiance,heat flux and the temperature at 0.05 m and 0.30 m from the inner surface of the wall at the upper,middle and lower points were determined to study thermal condition of the trapezoidal soil wall in solar greenhouse.The results showed that solar radiation and temperature at inner wall.Both solar irradiance and temperature of inner solar greenhouse at the upper,middle and lower points increased from the upper to the lower point.The total solar irradiance at the three points were 2.21,2.30,3.08 MJ?m-2 individually.The average temperature at 0.05 m at the three points were 2.37,13.83,14.13 ℃individually,while average temperature at 0.30 m were 11.13,12.62,13.34 ℃.Heat absorption increased from the upper point to the lower one,and the total heat absorption were 85.60,85.80,92.89 MJ?m-2 at the three points during the testing time.The average heat emission reached the lowest at upper point,and the average heat emission at lower point was higher than at the upper point,and it got the highest at the middle part.Heat emission at the three points were 76.47,96.88,93.70 MJ?m-2 individually.Heat absorption and solar irradiance were correlated with each other.Heat absorption affected heat emission,while heat emission affected by inner wall temperature.Therefore,solar irradiance directly affected the thermal condition of a solar green house.

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Last Update: 2017-04-18