Analysis of double suction pumps in both pump and turbine modes using entropy factor

Liu, SY and Yang, SS and Singh, P and Zhou, L (2024) Analysis of double suction pumps in both pump and turbine modes using entropy factor. In: Renewable Energy, 237 .

PDF Ren_eng_237_2024.pdf - Published Version Restricted to Registered users only Download (11MB) | Request a copy

Abstract

Pump as turbine (PAT) is one of the most extensively applied hydraulic machinery and play a prominent role in converting mechanical energy into electricity. However, choosing the suitable type of pump to use as a turbine is always a problem. Therefore, it is necessary to carry out a detailed analysis of these two operating modes. In this paper, a double suction pump is numerically simulated based on SST k- � model in CFX. The hydraulic performance and internal flow are studied with different flow rates. The simulation results verified by experiments show that the flow rate at the best efficiency point of the turbine is approximately 1.7 times that of the pump, and the head is 2.22 times that of the pump. Besides energy loss is analyzed based on entropy production theory and the specific location of the energy loss of each domain is studied in detail. Analysis of entropy production proves that flow energy dissipation primarily concentrates within the volute casing in pump mode, with an average proportion of 45.6 . While in the PAT mode, it is mainly concentrated in the impeller and suction chamber, accounting for 56 and 25.2 respectively. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Renewable Energy
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the publisher.
Keywords:	Double suction pumps; Double-suction centrifugal pumps; Energy; Entropy factors; Entropy production; Hydraulic performance; Mechanical energies; Operating modes; Pump as turbine; Turbine modes, Centrifugal pumps, energy dissipation; entropy; machinery; pump; simulation
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited:	12 Nov 2024 18:06
Last Modified:	12 Nov 2024 18:06
URI:	http://eprints.iisc.ac.in/id/eprint/86655

Actions (login required)

View Item