Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China
Non-uniform environmental conditioning has established substantial energy-saving and conditioning effects in residential buildings, however, few studies on the technology applied in greenhouses have been conducted. Semi-enclosed greenhouse development is hindered by energy consumption. To better app...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
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| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023093519 |
| _version_ | 1827615858916065280 |
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| author | Xianpeng Sun Jinhong He Chuanzhen Li Yangda Chen Runjie Li Ziteng Wang Weijun Wu Yapeng Li Xuxin Guo Xinke Wang |
| author_facet | Xianpeng Sun Jinhong He Chuanzhen Li Yangda Chen Runjie Li Ziteng Wang Weijun Wu Yapeng Li Xuxin Guo Xinke Wang |
| author_sort | Xianpeng Sun |
| collection | DOAJ |
| description | Non-uniform environmental conditioning has established substantial energy-saving and conditioning effects in residential buildings, however, few studies on the technology applied in greenhouses have been conducted. Semi-enclosed greenhouse development is hindered by energy consumption. To better apply non-uniform environmental conditioning technology in greenhouses, it is necessary to investigate the non-uniform characteristics of field environment parameters. Therefore, spatial and temporal measurements of indoor temperature and relative humidity in a Venlo-type greenhouse in Yangling, China, were conducted on June 5–11, 2022. Temperature and humidity sensors were arranged in the greenhouse at 4.5 m intervals, in the canopy, cultivation, center, and root areas. Temperature and humidity measurement points on the greenhouse walls were selected. The measurement results showed large fluctuations in the indoor temperature and relative humidity over time. The difference between indoor and outdoor average temperatures ranged from -5–10 °C and temperatures unsuitable for tomato growth were identified, although some passive conditioning methods such as ventilation and water spraying were employed, which indicates the necessity of active heating and cooling. Based on the measured data, the nonuniformity coefficients of temperature and relative humidity in different directions in the greenhouse were calculated. A larger non-uniformity in the vertical direction was found compared to that in the horizontal direction. These results suggest the possibility of non-uniform environmental conditioning. A rough estimation of the energy consumption by the two different condition modes, namely zone-specific and overall conditioning, was made. A huge energy saving of 69.6 % by the zone-specific conditioning mode was revealed compared to the overall conditioning. This implies a huge advantage in energy efficiency by non-unform environmental conditioning technologies applied in greenhouses. The study provides useful data for understanding non-uniform environments in greenhouses and the application of non-uniform environmental conditioning technologies. |
| first_indexed | 2024-03-09T09:16:43Z |
| format | Article |
| id | doaj.art-499bb3a8b250497a9bd6d40ef8051f15 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-09T09:16:43Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-499bb3a8b250497a9bd6d40ef8051f152023-12-02T07:05:18ZengElsevierHeliyon2405-84402023-11-01911e22143Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, ChinaXianpeng Sun0Jinhong He1Chuanzhen Li2Yangda Chen3Runjie Li4Ziteng Wang5Weijun Wu6Yapeng Li7Xuxin Guo8Xinke Wang9College of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China; Key Laboratory of Horticultural Engineering in Northwest Facilities, Ministry of Agriculture, Yangling 712100, Shaanxi Province, China; Facility Agriculture Engineering Technology Research Center of Shaanxi Province, Yangling 712100, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaSchool of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaCollege of Horticulture, North West Agriculture and Forestry University, Yangling 712100, Shaanxi Province, ChinaSchool of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province, China; Corresponding author.Non-uniform environmental conditioning has established substantial energy-saving and conditioning effects in residential buildings, however, few studies on the technology applied in greenhouses have been conducted. Semi-enclosed greenhouse development is hindered by energy consumption. To better apply non-uniform environmental conditioning technology in greenhouses, it is necessary to investigate the non-uniform characteristics of field environment parameters. Therefore, spatial and temporal measurements of indoor temperature and relative humidity in a Venlo-type greenhouse in Yangling, China, were conducted on June 5–11, 2022. Temperature and humidity sensors were arranged in the greenhouse at 4.5 m intervals, in the canopy, cultivation, center, and root areas. Temperature and humidity measurement points on the greenhouse walls were selected. The measurement results showed large fluctuations in the indoor temperature and relative humidity over time. The difference between indoor and outdoor average temperatures ranged from -5–10 °C and temperatures unsuitable for tomato growth were identified, although some passive conditioning methods such as ventilation and water spraying were employed, which indicates the necessity of active heating and cooling. Based on the measured data, the nonuniformity coefficients of temperature and relative humidity in different directions in the greenhouse were calculated. A larger non-uniformity in the vertical direction was found compared to that in the horizontal direction. These results suggest the possibility of non-uniform environmental conditioning. A rough estimation of the energy consumption by the two different condition modes, namely zone-specific and overall conditioning, was made. A huge energy saving of 69.6 % by the zone-specific conditioning mode was revealed compared to the overall conditioning. This implies a huge advantage in energy efficiency by non-unform environmental conditioning technologies applied in greenhouses. The study provides useful data for understanding non-uniform environments in greenhouses and the application of non-uniform environmental conditioning technologies.http://www.sciencedirect.com/science/article/pii/S2405844023093519GreenhouseIndoor environmentBuilding energyHorticultureAir conditioning |
| spellingShingle | Xianpeng Sun Jinhong He Chuanzhen Li Yangda Chen Runjie Li Ziteng Wang Weijun Wu Yapeng Li Xuxin Guo Xinke Wang Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China Heliyon Greenhouse Indoor environment Building energy Horticulture Air conditioning |
| title | Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China |
| title_full | Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China |
| title_fullStr | Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China |
| title_full_unstemmed | Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China |
| title_short | Field investigation of non-uniform environment in a Venlo-type greenhouse in Yangling, China |
| title_sort | field investigation of non uniform environment in a venlo type greenhouse in yangling china |
| topic | Greenhouse Indoor environment Building energy Horticulture Air conditioning |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023093519 |
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