|Table of Contents|

Analysis of Performance for Back Wall of Initiative Heat Storage of  Solidified Sand on Solar Greenhouse(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年09
Page:
46-52
Research Field:
Publishing date:

Info

Title:
Analysis of Performance for Back Wall of Initiative Heat Storage of  Solidified Sand on Solar Greenhouse
Author(s):
ZHU Chao1; SUN Yachen2; HE Bin3; BAO Encai2; ZHANG Yong2; ZOU Zhirong2
(1.College of Mechanical and Electronic Engineering,Northwest A&F University,Yangling,Shaanxi 712100;2.College of Horticulture,Northwest A&F University,Yangling,Shaanxi 712100；3.College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100)
Keywords:
solidified sand; active heat storage; solar greenhouse; performance analysis
PACS:
-
DOI:
10.11937/bfyy.201709010
Abstract:
The northwest of China area is vast and sandy soil resources are rich.A kind of initiative heat storage of solidified sand back wall solar greenhouse was designed in this study.Concrete precast slabs with channels were stored inside the wall at different layers.During daytime,the hot air in the greenhouse was positively stored in the wall with fans.In this way,during night time,the stored heat could be actively released into the greenhouses,thereby improving the temperature.Data from typical winter sunny days,cloudy days and snowy days were selected.The differences of inner greenhouse photometric quantity,temperature and inner wall temperature were analyzed between solidified sand heat storage walls and regular benzene plate brick walls.Compared with greenhouses with regular benzene plate brick walls,in greenhouses with solidified sand heat storage walls,no significant photometric quantity differences were observed.For the average inner temperature,the temperature increased 1.7,2.5,2.4 ℃,respectively,during typical winter sunny days(January 24th,2016),cloudy days(January 16th,2016) and snow days(December 11th,2015).The constant inner temperature regions in solidified sand heat storage walls ranged from 740 mm to 1 000 mm.Among these,the heat storage thickness exceeded 740 mm and the solidified sand heat storage wall thickness exceeded 620 mm.The overall heat storage thickness and capacity both exceeded that of regular benzene plate brick walls.These results showed that this new greenhouse had a very good thermal insulation effects and were suitable for further applications in non-cultivated land area of northwest of China.

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Last Update: 2017-05-12