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Development of Optimal Model of Water, Materials, Energy and Environment in Greenhouse Cultivation with Emphasis on Water, Materials and Energy Recovery

Izanloo, Nahid | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53794 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Saboohi, Yadollah
  7. Abstract:
  8. The purpose of this study is to develop a new optimal solution method for controlling the greenhouse climate and minimizing energy demand for heating and cooling the greenhouse. As greenhouses move towards more advanced structures and technologies, the need for advanced control will be more important in order to reduce energy consumption. More comprehensive and accurate mathematical models are needed for complex systems, multiple inputs and multiple outputs to make system behavior perform better and more efficiently. In this research, a new method has been developed for optimal control of the greenhouse and a specific greenhouse climate model is used which is based on optimal closed loop control. In fact, in the new method, a number of specific points are considered in addition to time intervals for discretizing a continuous problem. These points are applied to all variables and constraints of the problem and help to solve the nonlinear problem accurately, so the new optimal control method compared to the reference model. It has less for heating and cooling the greenhouse. Also, to verify the performance of the new method, two indicators of absolute error and relative error percentage have been presented, and the results of these two indicators indicate the optimal performance of the developed method
  9. Keywords:
  10. Optimal Control ; Energy Demand ; Greenhouse Heating Demand ; Greenhouse Climate ; Water Reclamation ; Energy Regeneration ; Energy Minimization

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