Energies, Vol. 10, Pages 103: A Performance Prediction Method for Pumps as Turbines (PAT) Using a Computational Fluid Dynamics (CFD) Modeling Approach
Small and micro hydropower systems represent an attractive solution for generating electricity at low cost and with low environmental impact. The pump-as-turbine (PAT) approach has promise in this application due to its low purchase and maintenance costs. In this paper, a new method to predict the inverse characteristic of industrial centrifugal pumps is presented. This method is based on results of simulations performed with commercial three-dimensional Computational Fluid Dynamics (CFD) software. Model results have been first validated in pumping mode using data supplied by pump manufacturers. Then, the results have been compared to experimental data for a pump running in reverse. Experimentation has been performed on a dedicated test bench installed in the Department of Civil Construction and Environmental Engineering of the University of Naples Federico II. Three different pumps, with different specific speeds, have been analyzed. Using the model results, the inverse characteristic and the best efficiency point have been evaluated. Finally, results have been compared to prediction methods available in the literature.
IJERPH, Vol. 15, Pages 1380: In Vitro and In Vivo Experimental Studies of PM2.5 on Disease Progression
International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15071380
Authors:
Ching-Chang Cho
Wen-Yeh Hsieh
Chin-Hung Tsai
Cheng-Yi Chen
Hui-Fang C ... more
Energies, Vol. 11, Pages 1719: Building Retrofit with Photovoltaics: Construction and Performance of a BIPV Ventilated Façade
Energies doi: 10.3390/en11071719
Authors:
Nuria Martín-Chivelet
Juan Carlos Gutiérrez
Miguel Alonso-Abella
Faustino Chenlo
José Cuenca
Building ... more
Materials, Vol. 11, Pages 1123: Electrochemically Enhanced Drug Delivery Using Polypyrrole Films
Materials doi: 10.3390/ma11071123
Authors:
Sayed Ashfaq Ali Shah
Melike Firlak
Stuart Ryan Berrow
Nathan Ross Halcovitch
Sara Jane Baldock
Bakhtiar Muhammad Yousafzai
Rania M ... more