Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode

IntroductionThe increasing global population on the one hand and limited water and soil resources on the other hand, contribute to the need for the supply of agricultural products by adopting modern methods. One of the modern methods of farming is the cultivation of products in commercial greenhouse...

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Autores principales:	S Mirzamohammadi, A Jabarzadeh, M Salehi Shahrabi
Formato:	article
Lenguaje:	EN FA
Publicado:	Ferdowsi University of Mashhad 2021
Materias:	energy security food security greenhouse renewable energy Agriculture (General) S1-972 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/4143c6f124354741a2de497a2bfc3648
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id	oai:doaj.org-article:4143c6f124354741a2de497a2bfc3648
record_format	dspace
institution	DOAJ
collection	DOAJ
language	EN FA
topic	energy security food security greenhouse renewable energy Agriculture (General) S1-972 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	energy security food security greenhouse renewable energy Agriculture (General) S1-972 Engineering (General). Civil engineering (General) TA1-2040 S Mirzamohammadi A Jabarzadeh M Salehi Shahrabi Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode
description	IntroductionThe increasing global population on the one hand and limited water and soil resources on the other hand, contribute to the need for the supply of agricultural products by adopting modern methods. One of the modern methods of farming is the cultivation of products in commercial greenhouses. Despite favorable performance of greenhouses in the agricultural sector, high demand for direct and indirect energy is among the main considerations of developing them because the energy supply of greenhouses has the highest influence on the performance of greenhouses, quality of products, and market price of products. In this study, the energy supply of greenhouses in the case of using renewable resources is done in a grid connection state. Trading energy with main grid is enabled. Decision-makers’ objective is determining the optimal number of renewable resources and energy storage units for the purpose of income maximization.Materials and MethodsBasically, the supply of energy for greenhouses or in other terms supply of electric, cooling, and heating loads required by greenhouses is intended to cover lighting, internal temperature, emission of CO2, and relative humidity. Since many greenhouses have proper access to the main grid for the supply of their demanded load, the problem seeks maximum use of renewable energy rather than buying power from the grid for supplying the loads which greenhouses need to its secure revenues. To this, mathematical modeling has used to determine the optimal number of energy sources and storage units that revenues of using renewable energy resources be optimized based on existing limitations. These limitations include balancing generation and consumption of thermal and electrical power in each hour, logical relationship between charging and discharging of batteries, limit of power generation of renewable sources in each hour of the day and the level of capital available for investment.Results and DiscussionBased on the collected data, 9 different issues have been defined in terms of the proportion of costs of solar energy and wind energy and the proportion of purchasing and selling price of power. The obtained results suggest that in the case of equality of investment and maintenance costs of solar and wind energies, the use of wind energy rather than solar energy will be justified. The most significant reasons for this is considering proper conditions of wind speed which causes its inclusion in optimal solution of the problem since using solar energy during nightly hours is impossible. In addition, in the case of the equality of above costs, when purchasing and selling price of power cost is the same, the generated energy is completely used in the greenhouse. In the case of increasing the selling price, energy supply to the main grid will be economically justified. Since investment and maintenance costs of wind power are two times and 1.5 times higher than those of solar energy, using wind energy is cost-effective.ConclusionsThe results suggest that in the case of an equal price of selling power to the grid and buying power from it, all of the energy will be consumed in the greenhouse. In the case of an increase in selling price, the supply of energy to the main grid will be economically justified. In addition, the results imply the significant effect of geographic conditions of the region, since sometimes concurrent use of renewable energies is unjustified. Since the lack of supply of energy to greenhouses significantly influences the cultivation of products, considering the cost of lack of energy supply in modeling is one of the contributions of the present study. Another significant aspect of the study is the generalization of modeling from the greenhouse to greenhouse complexes. To do so, using the notion of micro-hub for greenhouses and their management will be useful.
format	article
author	S Mirzamohammadi A Jabarzadeh M Salehi Shahrabi
author_facet	S Mirzamohammadi A Jabarzadeh M Salehi Shahrabi
author_sort	S Mirzamohammadi
title	Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode
title_short	Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode
title_full	Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode
title_fullStr	Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode
title_full_unstemmed	Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode
title_sort	greenhouses energy supply modeling using renewable energy in grid-connected mode
publisher	Ferdowsi University of Mashhad
publishDate	2021
url	https://doaj.org/article/4143c6f124354741a2de497a2bfc3648
work_keys_str_mv	AT smirzamohammadi greenhousesenergysupplymodelingusingrenewableenergyingridconnectedmode AT ajabarzadeh greenhousesenergysupplymodelingusingrenewableenergyingridconnectedmode AT msalehishahrabi greenhousesenergysupplymodelingusingrenewableenergyingridconnectedmode
_version_	1718429829069537280
spelling	oai:doaj.org-article:4143c6f124354741a2de497a2bfc36482021-11-14T06:40:21ZGreenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode2228-68292423-394310.22067/jam.v11i2.79780https://doaj.org/article/4143c6f124354741a2de497a2bfc36482021-09-01T00:00:00Zhttps://jame.um.ac.ir/article_34764_4cc8bfc73034374aba70428168664d17.pdfhttps://doaj.org/toc/2228-6829https://doaj.org/toc/2423-3943IntroductionThe increasing global population on the one hand and limited water and soil resources on the other hand, contribute to the need for the supply of agricultural products by adopting modern methods. One of the modern methods of farming is the cultivation of products in commercial greenhouses. Despite favorable performance of greenhouses in the agricultural sector, high demand for direct and indirect energy is among the main considerations of developing them because the energy supply of greenhouses has the highest influence on the performance of greenhouses, quality of products, and market price of products. In this study, the energy supply of greenhouses in the case of using renewable resources is done in a grid connection state. Trading energy with main grid is enabled. Decision-makers’ objective is determining the optimal number of renewable resources and energy storage units for the purpose of income maximization.Materials and MethodsBasically, the supply of energy for greenhouses or in other terms supply of electric, cooling, and heating loads required by greenhouses is intended to cover lighting, internal temperature, emission of CO2, and relative humidity. Since many greenhouses have proper access to the main grid for the supply of their demanded load, the problem seeks maximum use of renewable energy rather than buying power from the grid for supplying the loads which greenhouses need to its secure revenues. To this, mathematical modeling has used to determine the optimal number of energy sources and storage units that revenues of using renewable energy resources be optimized based on existing limitations. These limitations include balancing generation and consumption of thermal and electrical power in each hour, logical relationship between charging and discharging of batteries, limit of power generation of renewable sources in each hour of the day and the level of capital available for investment.Results and DiscussionBased on the collected data, 9 different issues have been defined in terms of the proportion of costs of solar energy and wind energy and the proportion of purchasing and selling price of power. The obtained results suggest that in the case of equality of investment and maintenance costs of solar and wind energies, the use of wind energy rather than solar energy will be justified. The most significant reasons for this is considering proper conditions of wind speed which causes its inclusion in optimal solution of the problem since using solar energy during nightly hours is impossible. In addition, in the case of the equality of above costs, when purchasing and selling price of power cost is the same, the generated energy is completely used in the greenhouse. In the case of increasing the selling price, energy supply to the main grid will be economically justified. Since investment and maintenance costs of wind power are two times and 1.5 times higher than those of solar energy, using wind energy is cost-effective.ConclusionsThe results suggest that in the case of an equal price of selling power to the grid and buying power from it, all of the energy will be consumed in the greenhouse. In the case of an increase in selling price, the supply of energy to the main grid will be economically justified. In addition, the results imply the significant effect of geographic conditions of the region, since sometimes concurrent use of renewable energies is unjustified. Since the lack of supply of energy to greenhouses significantly influences the cultivation of products, considering the cost of lack of energy supply in modeling is one of the contributions of the present study. Another significant aspect of the study is the generalization of modeling from the greenhouse to greenhouse complexes. To do so, using the notion of micro-hub for greenhouses and their management will be useful.S MirzamohammadiA JabarzadehM Salehi ShahrabiFerdowsi University of Mashhadarticleenergy securityfood securitygreenhouserenewable energyAgriculture (General)S1-972Engineering (General). Civil engineering (General)TA1-2040ENFAJournal of Agricultural Machinery, Vol 11, Iss 2, Pp 293-303 (2021)

Greenhouses Energy Supply Modeling Using Renewable Energy in Grid-Connected mode

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