ISHS Acta Horticulturae 148: III International Symposium on Energy in Protected Cultivation
METHODS AND INSTRUMENTS FOR VENTILATION RATE MEASUREMENTS |
| Authors: | M. Goedhart, E.M. Nederhoff, A.J. Udink ten Cate, G.P.A. Bot |
| Abstract:
An infra-red gas analyzer is applied for tracer gas concentration measurements in greenhouses. From the measured concentrations the ventilation rate of the greenhouse is calculated. Nitrous oxide (N2O) is applied as a tracer, because it is inert for plants and because it mixes well with air. Its moleculair weight is the same as that of CO2, which is of interest for fotosynthesis experiments. Since water vapour influences the infra-red absorbtion, a multi-component gas analyzer has to be used. | |
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