VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/3101 |
Resumo: | This study is based on the experiments with a tomato crop, carried out in a Mediterranean unheated greenhouse, located at Lisbon. The main objective is to study the comparative performance of a physical and a statistical model to explain and forecast the dynamic of the greenhouse climate, validating their results. External and internal climatic data as well as information on the evolution of the crop were collected during the growing season. Several days in different months were chosen to validate the models and to simulate the environmental conditions inside the greenhouse, based on the climatic external data and parameters related with the growing medium, the covering material and the crop. In the physical model, basically quasi-one-dimensional and single layer, the greenhouse is divided in process and boundary components. This model, developed in Spain, has been used and improved for the conditions of the greenhouse climate in Lisbon. Results show that the model can be used to predict the internal air temperature and relative humidity. The statistical dynamic model was developed for predicting the internal air temperature and relative humidity of the greenhouse. The system is analysed with one hour time steps, by means of spectral and time series methods. The procedure develops sequentially the steps of statistical identification of the variables, the analysis of the dynamic relations between them, and the estimation of multiple transfer function models. To discriminate the different behaviour of the greenhouse climate between diurnal and nocturnal periods, intervention analysis was used. In spite of the high number of parameters, the model allows to give a good explanation and prediction of the dynamic of the system. The study reveals an important relationship between the internal air temperature and the solar radiation, the external air temperature and the ventilation rate. Comparison of the measured and simulated data shows that the models predict internal conditions reasonably well. However, as it was expected, some adjustments are still necessary to improve the agreement. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGALprotected cultivationmodellingclimatetomatocomputer simulationtime series modelsThis study is based on the experiments with a tomato crop, carried out in a Mediterranean unheated greenhouse, located at Lisbon. The main objective is to study the comparative performance of a physical and a statistical model to explain and forecast the dynamic of the greenhouse climate, validating their results. External and internal climatic data as well as information on the evolution of the crop were collected during the growing season. Several days in different months were chosen to validate the models and to simulate the environmental conditions inside the greenhouse, based on the climatic external data and parameters related with the growing medium, the covering material and the crop. In the physical model, basically quasi-one-dimensional and single layer, the greenhouse is divided in process and boundary components. This model, developed in Spain, has been used and improved for the conditions of the greenhouse climate in Lisbon. Results show that the model can be used to predict the internal air temperature and relative humidity. The statistical dynamic model was developed for predicting the internal air temperature and relative humidity of the greenhouse. The system is analysed with one hour time steps, by means of spectral and time series methods. The procedure develops sequentially the steps of statistical identification of the variables, the analysis of the dynamic relations between them, and the estimation of multiple transfer function models. To discriminate the different behaviour of the greenhouse climate between diurnal and nocturnal periods, intervention analysis was used. In spite of the high number of parameters, the model allows to give a good explanation and prediction of the dynamic of the system. The study reveals an important relationship between the internal air temperature and the solar radiation, the external air temperature and the ventilation rate. Comparison of the measured and simulated data shows that the models predict internal conditions reasonably well. However, as it was expected, some adjustments are still necessary to improve the agreement.Elsevier2012-01-09T10:27:15Z2012-01-092001-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/3101http://hdl.handle.net/10174/3101engBAPTISTA FJ, LITAGO J, NAVAS LM e MENESES JM. 2001. Validation and comparison of a physical and a statistical dynamic climatic model for a Mediterranean greenhouse in Portugal. Acta Horticulturae 559:479-486.Partilhar com o ICAAMfb@uevora.ptndndjmeneses@isa.utl.pt580Baptista, F.J.Litago, J.Navas, L.M.Meneses, J.F.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-08T03:47:53ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
title |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
spellingShingle |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL Baptista, F.J. protected cultivation modelling climate tomato computer simulation time series models |
title_short |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
title_full |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
title_fullStr |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
title_full_unstemmed |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
title_sort |
VALIDATION AND COMPARISON OF A PHYSICAL AND A STATISTICAL DYNAMIC CLIMATIC MODEL FOR A MEDITERRANEAN GREENHOUSE IN PORTUGAL |
author |
Baptista, F.J. |
author_facet |
Baptista, F.J. Litago, J. Navas, L.M. Meneses, J.F. |
author_role |
author |
author2 |
Litago, J. Navas, L.M. Meneses, J.F. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Baptista, F.J. Litago, J. Navas, L.M. Meneses, J.F. |
dc.subject.por.fl_str_mv |
protected cultivation modelling climate tomato computer simulation time series models |
topic |
protected cultivation modelling climate tomato computer simulation time series models |
description |
This study is based on the experiments with a tomato crop, carried out in a Mediterranean unheated greenhouse, located at Lisbon. The main objective is to study the comparative performance of a physical and a statistical model to explain and forecast the dynamic of the greenhouse climate, validating their results. External and internal climatic data as well as information on the evolution of the crop were collected during the growing season. Several days in different months were chosen to validate the models and to simulate the environmental conditions inside the greenhouse, based on the climatic external data and parameters related with the growing medium, the covering material and the crop. In the physical model, basically quasi-one-dimensional and single layer, the greenhouse is divided in process and boundary components. This model, developed in Spain, has been used and improved for the conditions of the greenhouse climate in Lisbon. Results show that the model can be used to predict the internal air temperature and relative humidity. The statistical dynamic model was developed for predicting the internal air temperature and relative humidity of the greenhouse. The system is analysed with one hour time steps, by means of spectral and time series methods. The procedure develops sequentially the steps of statistical identification of the variables, the analysis of the dynamic relations between them, and the estimation of multiple transfer function models. To discriminate the different behaviour of the greenhouse climate between diurnal and nocturnal periods, intervention analysis was used. In spite of the high number of parameters, the model allows to give a good explanation and prediction of the dynamic of the system. The study reveals an important relationship between the internal air temperature and the solar radiation, the external air temperature and the ventilation rate. Comparison of the measured and simulated data shows that the models predict internal conditions reasonably well. However, as it was expected, some adjustments are still necessary to improve the agreement. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-01-01T00:00:00Z 2012-01-09T10:27:15Z 2012-01-09 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/3101 http://hdl.handle.net/10174/3101 |
url |
http://hdl.handle.net/10174/3101 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
BAPTISTA FJ, LITAGO J, NAVAS LM e MENESES JM. 2001. Validation and comparison of a physical and a statistical dynamic climatic model for a Mediterranean greenhouse in Portugal. Acta Horticulturae 559:479-486. Partilhar com o ICAAM fb@uevora.pt nd nd jmeneses@isa.utl.pt 580 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
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repository.mail.fl_str_mv |
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_version_ |
1777304572991111168 |