Ethylene Pollution from Combustion in Greenhouses1
Open Access
- 1 February 1973
- journal article
- Published by American Society for Horticultural Science in HortScience
- Vol. 8 (1) , 23-24
- https://doi.org/10.21273/hortsci.8.1.23
Abstract
Ethylene (C2H4) is a by-product of combustion, regardless of precautions taken to ensure complete burning. To avoid crop damage in greenhouses where burning is used to supply CO2, flue gases must be diluted. Tests in different greenhouses in the Denver region showed that C2H4 may reach significant levels in flue gases from large unit heaters vented into the house–unless the unit is equipped with a distribution tube to force complete air recirculation, bringing fresh air to the burner. The free air entry for combustion should be double the National Fire Protection Code requirements ca. 1 cm2 100 kcal−1hr−1 (2 in2 per 5000 BTU hr−1), and specific provision should be made in the greenhouse structure for combustion air entry.Keywords
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