Renewable Energy Resources and Technologies
1. Comparative Analysis of Thermal Performance of a Solar Water Heating System Based on the Serpentine and Risers-Head Configurations

Selfa Johnson Zwalnan; Nanchen Nimyel Caleb; Mahan Morgan Mangai; Nantim Yohana Sanda

Volume 8, Issue 2 , Spring 2021, , Pages 21-30

  The effect of solar collector configurations on the thermal efficiency of an active solar water heater was investigated using TRNSYS in this study. Two versions of a solar heater were formulated on the basis of serpentine and riser-header flat plate configurations. Both models were simulated based on ...  Read More

Environmental Impacts and Sustainability
2. Application of Artificial Neural Networks to the Simulation of Climate Elements, Drought Forecast by Two Indicators of SPI and PNPI, and Mapping of Drought Intensity; Case Study of Khorasan Razavi

Mohammad Hossein Jahangir; Mahnaz Abolghasemi; Seyedeh Mahsa Mousavi Reineh

Volume 7, Issue 2 , Spring 2020, , Pages 19-26

  Drought is considered as a destructive disaster that can have irreversible effects on different aspects of life. In this study, artificial neural network was used as a powerful means of modeling nonlinear and indefinite processes in order to simulate drought intensities at 7 synoptic stations of Khorasan ...  Read More