Effect of glazing configuration as an energy-saving strategy in naturally ventilated greenhouses for strawberry (Seolhyang sp.) cultivation
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Date
2021-04-24
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Journal of Agricultural Engineering
Abstract
Strawberry cultivation is highly dependent on environmental
parameters and energy in winter. Two gothic greenhouses with different
glazing material combinations, i.e. polyolefin-thermal
screen (PoTS) and polyolefin-thermal screen-polyethylene
(PoTSPe), were used for strawberry cultivation. The energy-saving
capabilities of the two configurations and their impact on the
microclimates of the greenhouses were investigated. Temperature,
relative humidity, vapor pressure deficit, leaf temperature, and
solar radiation over the experimental period in the PoTS greenhouse
were 13.0±2.3°C, 75.8±6.5%, 0.4±0.1 kPa, 13.6±1.7°C, and
168.8±82.3W/m2, respectively, whereas in the PoTSPe setup they
were 13.1±2.3°C, 80.0±5.7%, 0.3±0.1 kPa, 13.5±1.6°C, and
183.1±90.5 W/m2. The mean fuel consumption by the PoTS and
PoTSPe greenhouses were 5.5 and 3.5 L, respectively. The performance
analysis shows that both greenhouses were able to maintain
the environmental parameters and leaf temperature within the recommended
ranges, although more energy was consumed with
PoTS. A higher yield was obtained in the PoTS greenhouse,
which, however, was not significantly different from the PoTSPe
yield.
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Keywords
Fuel consumption, humidity, microclimate, temperature, winter