Study of Economic Structure Design and Heat Flux Simulation for Double-Layer Greenhouse in Taiwan.
Date Issued
2005
Date
2005
Author(s)
Lee, Chun-Hsia
DOI
zh-TW
Abstract
Abstract
Taiwan, geographically located at West Pacific subtropical monsoon-climate area is in hot weather condition and the bio-production in structure greenhouse needs tremendous mechanical equipments for adjusting their living temperature. Therefore, designing a productive building which in compliance with the criteria of security, economic, and indoor climate environmental control, may uplift farmer’s efficiency of conducting a relative creatures business.
This research adopts〝STAAD-III〞structural analysis software to simulate double layers structure. In the premise of structural security, we implement the economic design to reach the cost orientation purpose. To constructing an single greenhouse, the most economic structure is the design of physical stress contribution : outer skeleton 3/4’’ , inner skeleton 1’’, the steel consuming quantity per unit measure is 5.14kg/m3, the unit volume cost is NT＄240/m2.
In the aspect of heat flux,〝 Fluent〞computational fluid dynamics model software to probe into double-layers shed cover greenhouse inner heat circulation and heat radiation status. By using such method to imitate monocline greenhouse model , the exploration of heat loss rate and maintaining the in-house temperature.
In summer, Double-layers shed cover greenhouse, when an air vent was shut, the hot air flows out through both side outlets is the best way to drain out hot air. Thus, the most energy-saving optimization module in the summer is using outer wall PE film 100-150cm high , inner wall 100-150cm high, and outlet-off module. In winter, when an air vent was fully opened ,it offers better in house air quality and ventilation. Thus, the best module of energy-saving optimization in the winter is utilizing outer-wall PE film off , inner-wall film 150-200cm high and Outlet-On.
Subjects
雙層被覆溫室
熱收支
經濟性設計
節能.
Double-layers cover greenhouse
Heat flux
Economic design
Energy-saving.
SDGs
Type
thesis
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