Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots

被引：0

作者：

Ohashi, Yuta ^{[1
]}

Tsuchiya, Ryota ^{[1
]}

Ishii, Masahisa ^{[1
]}

Hayashi, Makio ^{[1
]}

机构：

[1] NARO, Inst Rural Engn, Tsukuba, Ibaraki 3058609, Japan

来源：

HORTSCIENCE | 2025年 / 60卷 / 02期

关键词：

decarbonization; energy conservation; glass film; greenhouse; heat insulation; plastic film; THERMAL SCREENS; HOT-BOX;

D O I：

10.21273/HORTSCI18217-24

中图分类号：

S6 [园艺];

学科分类号：

0902 ;

摘要：

Improving greenhouse heat-insulating performance requires covering materials with low overall heat-transfer coefficients. We constructed a contour plot using equations relating this coefficient to longwave radiation absorptance under different outdoor downward longwave radiation levels. It revealed that the coefficient ranged from 4.7 to 7.7 W m(-2) K-1, decreasing with increasing downward longwave radiation and longwave radiation absorptance. This method facilitates rapid estimation of overall heat-transfer coefficients under different downward longwave-radiation levels, based on longwave-radiation absorptance.

引用

页码：235 / 236

页数：2

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