Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7163557 | Energy Conversion and Management | 2015 | 17 Pages |
Abstract
Hydropower plants usually runs at part load for several months in a year due to insufficient water availability for the power generation. The application range of PAT can be widened if its part load and/or maximum efficiency can be improved. In the present study, experimental investigations are carried out on centrifugal pump running in turbine mode to optimize its geometric and operational parameters e.g. impeller diameter and rotational speed. The experiments were performed in the wide range of rotational speeds varying from 900 to 1500Â rpm with original (â
250Â mm), 10% trimmed (â
225Â mm) and 20% trimmed (â
200Â mm) impellers. Impeller trimming led to improvement in efficiency at part load operating conditions. The performance of PAT was found better at the lower speeds than that at the rated speed. The effects of blade rounding were studied in all the cases and it led to 3-4% rise in efficiency at rated speed with the original impeller. The empirical correlation is also developed for prediction of efficiency in terms of impeller diameter and rotational speed in non-dimensional form.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Sanjay V. Jain, Abhishek Swarnkar, Karan H. Motwani, Rajesh N. Patel,