Valuation of the Energy Performance of a Greenhouse with an Electric Heater Using Numerical Simulations
| Autor: | Fernando Rojano, Waldo Ojeda-Bustamante, Cruz Ernesto Aguilar-Rodriguez, Jorge Flores-Velázquez, Mauro Iñiguez-Covarrubias |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
020209 energy Nuclear engineering Airflow Energy balance Greenhouse Bioengineering 02 engineering and technology Computational fluid dynamics lcsh:Chemical technology 01 natural sciences Energy engineering thermal stratification lcsh:Chemistry Thermal 0202 electrical engineering electronic engineering information engineering Chemical Engineering (miscellaneous) lcsh:TP1-1185 energy engineering Computational Fluid Dynamics (CFD) business.industry crop requirements Process Chemistry and Technology Energy consumption Temperature gradient lcsh:QD1-999 Environmental science business 010606 plant biology & botany |
| Zdroj: | Processes, Vol 8, Iss 600, p 600 (2020) Processes Volume 8 Issue 5 |
| ISSN: | 2227-9717 |
| Popis: | In Mexico, there are regions where the temperature drops below the minimum threshold for tomato cultivation (10 °C), requiring the implementation of auxiliary equipment to heat greenhouse air. The objective of this work was to estimate the energy consumption necessary to maintain climate requirements of a greenhouse located in Texcoco, State of Mexico, by using a model of energy balance implemented on Computational Fluid Dynamics (CFD) simulations. The temperature prediction relied on a numerical model based on CFD, proposing a benchmarking on the position and direction of the heater to estimate its effect on the thermal distribution. Results indicated that heater operation on January 2019, a power of 85.56 kW was needed to keep the greenhouse at 12 °C. Also, simulations indicated that electric heater used was not enough to get a homogeneous temperature inside the greenhouse. To achieve well-distributed thermal conditions, it was necessary to consider both the direction and position of heaters. Consequently, airflow direction became more important than height of the heater in order to homogenize the greenhouse area, given that the thermal gradient was reduced due to reverse heat flows. |
| Databáze: | OpenAIRE |
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