| dc.contributor.author |
Papadakis, G |
en |
| dc.contributor.author |
Frangoudakis, A |
en |
| dc.contributor.author |
Kyritsis, S |
en |
| dc.date.accessioned |
2014-06-06T06:42:42Z |
|
| dc.date.available |
2014-06-06T06:42:42Z |
|
| dc.date.issued |
1994 |
en |
| dc.identifier.issn |
00218634 |
en |
| dc.identifier.uri |
http://dx.doi.org/10.1006/jaer.1994.1022 |
en |
| dc.identifier.uri |
http://62.217.125.90/xmlui/handle/123456789/765 |
|
| dc.title |
Experimental Investigation and Modelling of Heat and Mass Transfer between a Tomato Crop and the Greenhouse Environment |
en |
| heal.type |
journalArticle |
en |
| heal.identifier.primary |
10.1006/jaer.1994.1022 |
en |
| heal.publicationDate |
1994 |
en |
| heal.abstract |
Experimental investigation and modelling of heat and mass transfer between a tomato crop and the greenhouse environment is elaborated. The transfer of sensible and latent heat between the canopy and the ambient air is assumed to take place via an exchange area equal to the total leaf area across two resistances, the internal and the external, which are properly defined. The external resistance is determined as a function of the Nu number. A method is proposed to parameterize the internal resistance as a function of the canopy temperature, the canopy full spectrum net radiation and the crop-air vapour pressure deficit. A model is proposed for the calculation of the crop temperature and crop transpiration rate as a function of time and the environmental variables. The calculated canopy temperature compared well with the measured one, which was found to be lower than that of the greenhouse air. Calculated canopy transpiration rates are presented as a function of time and the environmental variables. The canopy transpiration flux was found to be higher than that of the full spectrum crop net radiation on a 24 h basis. The comparison of calculated crop transpiration on a daytime basis with those obtained by two other models was satisfactory only at moderate solar radiation intensities. During days with high radiation intensities the present model compared well with one model only. |
en |
| heal.journalName |
Journal of Agricultural Engineering Research |
en |
| dc.identifier.issue |
4 |
en |
| dc.identifier.volume |
57 |
en |
| dc.identifier.doi |
10.1006/jaer.1994.1022 |
en |
| dc.identifier.spage |
217 |
en |
| dc.identifier.epage |
227 |
en |