Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots
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...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Society for Horticultural Science (ASHS)
2025-01-01
|
| Series: | HortScience |
| Subjects: | |
| Online Access: | https://journals.ashs.org/hortsci/view/journals/hortsci/60/2/article-p235.xml |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832582503095861248 |
|---|---|
| author | Yuta Ohashi Ryota Tsuchiya Masahisa Ishii Makio Hayashi |
| author_facet | Yuta Ohashi Ryota Tsuchiya Masahisa Ishii Makio Hayashi |
| author_sort | Yuta Ohashi |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-37290f55390a4905b62a52c7cd995c2f |
| institution | Kabale University |
| issn | 2327-9834 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | American Society for Horticultural Science (ASHS) |
| record_format | Article |
| series | HortScience |
| spelling | doaj-art-37290f55390a4905b62a52c7cd995c2f2025-01-29T16:15:44ZengAmerican Society for Horticultural Science (ASHS)HortScience2327-98342025-01-01602https://doi.org/10.21273/HORTSCI18217-24Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour PlotsYuta Ohashi0Ryota Tsuchiya1Masahisa Ishii2Makio Hayashi3Institute for Rural Engineering, NARO, Tsukuba, Ibaraki 305-8609, JapanInstitute for Rural Engineering, NARO, Tsukuba, Ibaraki 305-8609, JapanInstitute for Rural Engineering, NARO, Tsukuba, Ibaraki 305-8609, JapanInstitute for Rural Engineering, NARO, Tsukuba, Ibaraki 305-8609, JapanImproving 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.https://journals.ashs.org/hortsci/view/journals/hortsci/60/2/article-p235.xmldecarbonizationenergy conservationglass filmgreenhouseheat insulationplastic film |
| spellingShingle | Yuta Ohashi Ryota Tsuchiya Masahisa Ishii Makio Hayashi Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots HortScience decarbonization energy conservation glass film greenhouse heat insulation plastic film |
| title | Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots |
| title_full | Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots |
| title_fullStr | Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots |
| title_full_unstemmed | Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots |
| title_short | Greenhouse Covering Material Overall Heat-transfer Coefficient Determination Using Contour Plots |
| title_sort | greenhouse covering material overall heat transfer coefficient determination using contour plots |
| topic | decarbonization energy conservation glass film greenhouse heat insulation plastic film |
| url | https://journals.ashs.org/hortsci/view/journals/hortsci/60/2/article-p235.xml |
| work_keys_str_mv | AT yutaohashi greenhousecoveringmaterialoverallheattransfercoefficientdeterminationusingcontourplots AT ryotatsuchiya greenhousecoveringmaterialoverallheattransfercoefficientdeterminationusingcontourplots AT masahisaishii greenhousecoveringmaterialoverallheattransfercoefficientdeterminationusingcontourplots AT makiohayashi greenhousecoveringmaterialoverallheattransfercoefficientdeterminationusingcontourplots |