Amélioration du bilan thermique sous abri-serre
Improvement of the thermal balance under polyethylen greenhouse. Use of a longlife polyethylene film for crop protection under greenhouse results in an important, and very often too important improvement of the maximum air temperature, and in a very small improvement of the minimum air temperature d...
| Format: | Article |
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| Language: | English |
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Presses Agronomiques de Gembloux
1983-01-01
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| Series: | Tropicultura |
| Online Access: | http://www.tropicultura.org/text/v1n2/59.pdf |
| Summary: | Improvement of the thermal balance under polyethylen greenhouse. Use of a longlife polyethylene film for crop protection under greenhouse results in an important, and very often too important improvement of the maximum air temperature, and in a very small improvement of the minimum air temperature during the night. A theoretical approach of energy losses under PE greenhouse in Tunesia allows the constatation of the importance of infrared radiation during the night. Use of new and improved polyethylene films and thermal screens reducing energy losses by infrared radiation, are discussed. Heating of the greenhouse by an air blower peak heating system seems to be expensive under our conditions. Alternative heating with back radiant mulch film tubes using solar captors and geothermic ressources are discussed. Reduction of maximum temperature under PE greenhouse is also discussed. |
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| ISSN: | 0771-3312 |