Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger
The aim of the study was to estimate the amount of thermal energy used for dehumidification of a naturally ventilated tomato greenhouse and to estimate how mechanical ventilation with the use of a heat exchanger recovering heat from the exhaust to the supply air may decrease the energy use. Measured...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Scientific Agricultural Society of Finland
2017-04-01
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| Series: | Agricultural and Food Science |
| Subjects: | |
| Online Access: | https://journal.fi/afs/article/view/58936 |
| _version_ | 1818235225385205760 |
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| author | Katarzyna Maslak Sven Nimmermark |
| author_facet | Katarzyna Maslak Sven Nimmermark |
| author_sort | Katarzyna Maslak |
| collection | DOAJ |
| description | The aim of the study was to estimate the amount of thermal energy used for dehumidification of a naturally ventilated tomato greenhouse and to estimate how mechanical ventilation with the use of a heat exchanger recovering heat from the exhaust to the supply air may decrease the energy use. Measured use of thermal energy in a naturally ventilated tomato greenhouse was compared to modelled values using Powersim® software. By the help of the model an estimation of the amount of energy used for dehumidification was made for the months April – September. A non-hygroscopic rotary air-to-air heat exchanger was studied, and its temperature and moisture efficiencies were measured. Modelling for leaf area index (LAI) 3.5 and 4.0 m2 m-2 indicated that 23 and 29% of the total thermal energy was used for moisture removal respectively. Modelling for the heat exchanger indicated thermal energy savings of 15 and 17% for the same LAI respectively. |
| first_indexed | 2024-12-12T11:50:35Z |
| format | Article |
| id | doaj.art-fc2799c30011485d93ffd1237c61e301 |
| institution | Directory Open Access Journal |
| issn | 1459-6067 1795-1895 |
| language | English |
| last_indexed | 2024-12-12T11:50:35Z |
| publishDate | 2017-04-01 |
| publisher | Scientific Agricultural Society of Finland |
| record_format | Article |
| series | Agricultural and Food Science |
| spelling | doaj.art-fc2799c30011485d93ffd1237c61e3012022-12-22T00:25:20ZengScientific Agricultural Society of FinlandAgricultural and Food Science1459-60671795-18952017-04-0126110.23986/afsci.58936Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchangerKatarzyna Maslak0Sven Nimmermark1Swedish University of Agricultural Sciences (SLU), Dept. of Biosystems and Technology, P.O. Box 103, SE-230 53 Alnarp, SwedenSwedish University of Agricultural Sciences (SLU), Dept. of Biosystems and Technology, P.O. Box 103, SE-230 53 Alnarp, SwedenThe aim of the study was to estimate the amount of thermal energy used for dehumidification of a naturally ventilated tomato greenhouse and to estimate how mechanical ventilation with the use of a heat exchanger recovering heat from the exhaust to the supply air may decrease the energy use. Measured use of thermal energy in a naturally ventilated tomato greenhouse was compared to modelled values using Powersim® software. By the help of the model an estimation of the amount of energy used for dehumidification was made for the months April – September. A non-hygroscopic rotary air-to-air heat exchanger was studied, and its temperature and moisture efficiencies were measured. Modelling for leaf area index (LAI) 3.5 and 4.0 m2 m-2 indicated that 23 and 29% of the total thermal energy was used for moisture removal respectively. Modelling for the heat exchanger indicated thermal energy savings of 15 and 17% for the same LAI respectively.https://journal.fi/afs/article/view/58936Thermal energy usegreenhouseshumiditydehumidificationventilationrotating heat exchanger |
| spellingShingle | Katarzyna Maslak Sven Nimmermark Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger Agricultural and Food Science Thermal energy use greenhouses humidity dehumidification ventilation rotating heat exchanger |
| title | Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger |
| title_full | Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger |
| title_fullStr | Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger |
| title_full_unstemmed | Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger |
| title_short | Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger |
| title_sort | thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air to air heat exchanger |
| topic | Thermal energy use greenhouses humidity dehumidification ventilation rotating heat exchanger |
| url | https://journal.fi/afs/article/view/58936 |
| work_keys_str_mv | AT katarzynamaslak thermalenergyusefordehumidificationofatomatogreenhousebynaturalventilationandasystemwithanairtoairheatexchanger AT svennimmermark thermalenergyusefordehumidificationofatomatogreenhousebynaturalventilationandasystemwithanairtoairheatexchanger |