|Table of Contents|

Feasibility of Application of Buried Pipe Fresh Air System in Solar Greenhouse(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年08
Page:
60-64
Research Field:
Publishing date:

Info

Title:
Feasibility of Application of Buried Pipe Fresh Air System in Solar Greenhouse
Author(s):
ZHANG Jitao1; LI Cui2; MA Dawei1; LIN Lu1; JI Zengshun1
(1.Research Center of Modern Agriculture,Shanxi Academy of Agricultural Science,Taiyuan,Shanxi 030031;2.College of Physics and Optoelectronics,Taiyuan University of Technology,Jinzhong,Shanxi 030600)
Keywords:
solar greenhouse; buried pipe fresh air system; ventilation
PACS:
-
DOI:
10.11937/bfyy.201708014
Abstract:
To explore the feasibility of application of buried pipe fresh air system in solar greenhouse,three kinds of different air velocities (5.8,4.6,3.1 m?s-1) were set up and monitored the air temperature and humidity of inlet and outlet of system,and recorded the temperature in the five points in pipe,and then thermal characteristics of the system were calculated.The results showed that the daily temperature difference was 0.3 ℃.Under conditions of 5.8,4.6,3.1 m?s-1,the new air temperature increased 7.8-8.9,9.8-11.9,6.3-7.8 ℃,and air humidity of outlet were 42.3%-52.0%,35.4%-40.3%,61.6%-83.6%,and enthalpy difference of outlet and inlet were 7.7-9.4,9.9-12.1,9.3-12.5 kJ?kg-1,and the absorbed heat by the soil were 23 160,23 492,14 884 kJ,respectively.Buried pipe fresh air system could significantly increased air temperature,and air humidity of the outlet was lower than indoor humidity,it had well capacity of absorption of heat.It illustrated that buried pipe fresh air system could be used to improve the air conditions in the solar greenhouse in winter.

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Last Update: 2017-05-02