Iranian Journal of Biosystem Engineering

Iranian Journal of Biosystem Engineering

Analysis energy consumption in greenhouse cucumber production (a case study in Tehran province)

Document Type : Research Paper

Authors
Reza Esfanjari Kenari 1
Mahdi Shaabanzadeh 2
Parinaz Jansooz 1
Ahmad Omidi 2
1 Ph. D. Student, Faculty of Agriculture, University of Zabol
2 Ph. D. Student, University College of Agriculture and Natural Resources, University of Tehran
10.22059/ijbse.2015.55670
Abstract
With the increasing world population and Limitations on arable land, increasing the yield per unit is one of alternatives human food supply. Greenhouse cultivation as one ways of increase the performance can arrive this purpose. But the energy restriction of another human challenges, So that increase the performance without considering energy consumption almost appears to be meaningless. Due to the high energy consumption in the greenhouse productions, in this study were evaluated the energy consumption and energy indices in the greenhouse cucumber productions in Tehran province. Also, the energy efficiency of firms was examined whit using Data Envelopment Analysis (DEA) method. The data for this study has been gathered through interviews from 160 cucumber producers of Tehran greenhouse in 2013. The results of this study showed that energy efficiency, energy productivity, net energy and specific energy is equal to 0.52, 0.65 kg/ MJ,-73180 MJ/ ha and 1/52 MJ /Kg, respectively. The share of direct, indirect, renewable and nonrenewable energies from total energy consumption was calculated 0.86, 0.14, 0.04 and 0.96, respectively. Also the result indicates the greenhouses are not efficiency,So that in this firms increase in input consumptions is more than production increase. Finally, this issue reduced the energy efficiency of the units.
Keywords
Energy productivity
Net Energy Gain
Specific Energy
renewable energy
Nonrenewable Energy
Subjects
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Iranian Journal of Biosystem Engineering
Volume 46, Issue 2 - Serial Number 2
Summer 2015
Pages 125-134

  • Receive Date 25 June 2014
  • Revise Date 06 December 2014
  • Accept Date 23 February 2015