Study on the Environmental Regulation and Cultivation Capacity of Simple Facilities in Double Covered Greenhouse
Date Issued
2006
Date
2006
Author(s)
Wang, Chien-Min
DOI
zh-TW
Abstract
This study used the method of field trial to research on the double-layer greenhouse facilities that are suitable for the demand of biological engineering in northern plain of Taiwan. Based on the foundation of improvement and research, the paper focuses on usage and ability of single-bevel double-layer covered greenhouse for temperature reduction and heat insulation during summer and heat-preservation during winter. The design purpose aims at creating economical and easy-operative types of facilities.
In double-layer covered greenhouses, temperature control facility utilizes the optimal modules to reach the range of 13 to 28℃ all year. Results in summer show that the inner temperature is 7.5℃ lower than that of the outside while the temperature in the daytime is 36-37℃; the silver and white net of 50% transparency, wind gaps are utilized and the PE rubber, air gaps are opened in the course of the experiment. On the other hand, under the condition of closing wind gaps and PE rubber is the best module of winter time, and the indoor temperature is increased by 1- 4℃ as in comparison with that of the outside. When adopting the underground tubing system, the indoor temperature is increased by 4-5℃.
The experiment on the facility of cultivation utilizes three methods - seeding, shooting, cultivating - to plant five kinds of crops in single-layer and double-layer covered greenhouses and screen houses, respectively. Comparing the results of crop growth, double-layer covered greenhouse, by incorporating environment adjustable facility, provides better growth rate for the crops.
As far as the capability of facilities and economical efficiency are concerned, the difference in temperature adjustment capability between the single-layer greenhouse with water-pad facility and double-layer covered greenhouse with air-layer is not obvious. However, the cost of manufacturing single-layer is 3 times of double-layer, the facility material cost is 5.2 times of double-layer, while the energy consumption is 6.8 times of double-layer.
Subjects
溫室設施
降溫
保溫
地中管
Greenhouse facility
Heat reduction
Heat preservation
Heat insulation
Underground pipe
SDGs
Type
thesis
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