ISHS Acta Horticulturae 76: Symposium on More Profitable Use of Energy in Protected Cultivation
UTILIZING TURBINE EXHAUST GASES FOR HEATING AND CARBON DIOXIDE ENRICHMENT OF GREENHOUSES |
| Authors: | E.A. Maginnes, M.O. Haukeness, G.H. Green, K.E. Miller |
| Abstract:
In 1974 an experimental greenhouse was constructed to evaluate utilizing the exhaust from a turbine fired with natural gas for greenhouse heating and CO2 enrichment. The exhaust gases could not be released directly into the growing space because they contain toxic amounts of NO and NO2. In order to use the heat and CO2 of the exhaust gases economically, a membrane system involving polyethylene is utilized to separate CO2 from the noxious components. A distribution system for the gases has been developed to meet the heating requirements down to -40°C and to result in a greenhouse CO2 level from 1500 to 5000 ppm, depending on the demand for heat. Only tomatoes have been tested to date. Plants receiving heat and simultaneous CO2 enhancement from exhaust gases produced at least 15% more fruit than those heated conventionally. Marketing trials have shown the fruit to have consumer appeal, while the heating and CO2 enrichment system has distinct economic benefits. | |
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