Information from the abstract
This study proposes a model for constructing an energy-efficient vertical farm by retrofitting an existing agricultural facility, specifically an Agricultural Shelter House ("Nongmak house"), and evaluates its performance.An eight-layer composite thermal insulation covering system was applied to a 231 m 2 (70 pyeong) agricultural shelter house, which was converted into a closed-type vertical farm.To quantitatively assess the thermal insulation performance and environmental stability of the retrofitted system, the U-value was measured, and the internal and external environmental data were analyzed.Environmental stability was defined as the degree to which optimal internal environments (temperature, humidity, etc.) for crop growth can be maintained within a certain range regardless of external environmental changes, which is essential for minimizing crop stress and creating efficient cultivation environments.The calculated U-value of the composite insulation system was 1.939 W/m 2 •K.Although this value does not reach the level of conventional container-type vertical farms (0.193-0.225W/m 2 •K), it exhibits superior performance compared to single-layer PE film greenhouses (6.476 W/m 2 •K) and high-performance triple-layer thermal curtain systems (2.73 W/m 2 •K).Furthermore, the analysis of external climate, conventional greenhouse, and vertical farm internal environments demonstrated that the retrofitted vertical farm maintained highly stable conditions, with a temperature coefficient of variation (CV) of 5.85% and a relative humidity CV of 11.58%.Compared to external and conventional greenhouse environments, this structure provided significantly enhanced environmental stability.Statistical analysis using independent t-tests confirmed that the vertical farm showed significantly more stable temperature (t = -17.370,p < 0.001) and humidity (t = 40.163,p < 0.001) compared to conventional greenhouse systems.Time-series analysis further revealed that the internal environment of the vertical farm remained consistent throughout seasonal changes (temperature CV: 1.16-1.38%).
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Related topics: Energy and Environmental Systems · Agriculture, Soil, Plant Science · Energy, Environment, Agriculture Analysis
Thai researcher and institutional participation
Sunwoo Park · Ministry of Agriculture and Cooperatives
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