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Scenario Evaluation for Nearly Net Zero Energy Greenhouse Considering Photovoltaic, Industrial Symbiosis and Ground to Air Heat Transfer

Solaimanian, Armaghan | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56174 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Roshandel, Ramin
  7. Abstract:
  8. To meet the high energy demand in greenhouse cultivation, clean technologies have been suggested. This research provides a computational and modeling framework to examine the integration of three systems including a photovoltaic panel, earth_air heat exchanger, and industrial symbiosis, to produce three types of energy (electricity cooling, and heating) in a Venlo-type greenhouse. To estimate the minimum energy required to maintain environmental parameters in optimal plant conditions, an energy demand model was developed with the ability to consider the effect of energy stored in the ground. For a greenhouse in Tehran, the annual heating requirement was calculated as 432 kWh/m2 and 227 kWh/m2 for cooling. These values are 20% and 30% less than the model in which the earth's energy storage is not seen (base model). In defining the scenarios, covering the south roof with a photovoltaic panel, earth_air heat exchanger in four designs, and three industrial coexistence flows were investigated. In the photovoltaic scenario, in the case of 70% south roof coverage without an artificial lighting system, the need for heating increases by 39.3%, cooling by 54.5%, and natural light by 41.5%. Photovoltaic electricity production in this case of covering the south roof is equal to 160.8 kWh/m2 and in the case of 50%, 114.9 kWh/m2 per year per square. In the scenario of the air-soil exchanger and considering an exchanger with a diameter of 0.5 meters and a length of 50 meters, it was determined that 39.2% of the annual cooling requirement can be provided. In the last scenario, industrial symbiosis, heat flow with a heat capacity of 317 W/m2 is needed for the total annual heating demand
  9. Keywords:
  10. Greenhouse Heating Demand ; Greenhouse ; Photovoltaic System ; Industrial Symbiosis ; Air-Earth Exchanher ; Nearly Net Zero Energy Greenhouse

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