Technical And Economic Feasibility of Saving Energy Consumption Through Solar Cells (Case Study: Water and Waste Company of Mashhad)

Document Type : Original Article

Authors

1 researcher

2 faculty member

3 کارشناس

4 پژوهشگر

10.22080/jeem.2025.29033.1029

Abstract

The present study was conducted with the aim of investigating the economic and technical feasibility of producing sustainable energy using solar panels in order to investigate energy savings in a building. In order for the results to be generalizable to any condition and any location, an attempt was made to formulate a precise formulation of technical and economic principles with the help of scientific references and to serve as the basis for calculations. The method used in the study is the estimation of annual energy from solar panels and its economic analysis based on the financial analysis indicators NPV and IRR. The sample location implemented in this study is the building of Water and Waste Company of Mashhad. The results showed that the cost price per kilowatt-hour in this method in 1402 was 86,446.67 Rls, which was higher than the government's purchase rate for distributed electricity (21,000 Rls). The calculations showed that the implementation of this plan, given the sample conditions, was not economically justified and had a negative NPV and its payback period was very long. Therefore, it is necessary to reduce the cost price by selecting optimal solutions and suggestions have been made to improve it. In the example described, if in the reverse calculations, it is assumed that the payback period and the IRR desired by the investor are 5 years and 40%, respectively, the results show that the electricity purchase tariff should be 360,000 Rls to provide these conditions and encourage the investor to implement it.

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History

  • Receive Date: 17 April 2025
  • Revise Date: 10 May 2025
  • Accept Date: 12 May 2025
  • Publish Date: 21 April 2025

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