Evaluating Different Greenhouse Cooling Systems in Various Climate Zones of Iran Considering Water Scarcity

Document Type : Research Article

Authors

1 M.Sc. Student, Department of Energy Engineering, Sharif University of Technology, Tehran, Iran

2 Assistant Professor, School of Mechanical Engineering, Shiraz University, Shiraz, Iran

3 Associate Professor, Department of Renewable Energies and Environment, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran

4 PhD Student, Department of Renewable Energies and Environment, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran

Abstract

This paper aims to develop a profound framework that opts for the most techno-economic cooling system considering different climate zones of Iran, water and energy carrier prices, and the crop’s cultivation conditions. Furthermore, it enables policy makers to come up with a water price to persuade the farmer to choose the least water consuming cooling system for the greenhouse. Three different cooling systems of fan and pad, direct expansion and absorption chiller are evaluated for five various climate zones of Iran. The evaluation takes place in three scenarios in which the first and second scenarios assesses all three cooling systems under the current and real price of water, while the third scenario obtains the optimal price of water that the cooling system get selected based on the least water consumption. Results show that the fan and pad cooling system, formerly believed to be the most economic one, is actually not the most techno-economic system for all climate zones of Iran but, the direct expansion system with the mean equivalent cooling cost of 0.0427 and 0.2733 $/kWh merits over the fan and pad system with the mean equivalent cooling cost of 0.051 and 0.8264 $/kWh in first and second scenario respectively. Finally, the third scenario suggests the policy makers should increase the water price by 17.4% so that the farmer is persuaded to select the most water conservative cooling system in all the climate zones of Iran.

Keywords

Main Subjects

References

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Iranian journal of Ecohydrology
Volume 6, Issue 1
April 2019
Pages 257-265

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History

  • Receive Date: 23 July 2018
  • Revise Date: 02 February 2019
  • Accept Date: 02 February 2019

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