Charakteristiken von Pumpen im Turbinenbetrieb

• Unité de recherche: OFEN
• Numéro de projet: 100400

Mots-clé (Allemand)

TP0033;Abklärungen Kleinwasserkraft

Description succincte (Allemand)

Standardpumpen eignen sich aus wirtschaftlichen Gründen vor allem für den Einsatz bei kleinen Leistungen in Trinkwassersystemen.

Rapport final (Anglais)

Thanks to the partnership between OFEN, Sulzer, EIG and HEVS important improvements for the determination of per-formance of pumps as turbines and for the use of small variable speed generators in small power plants have been done. The method proposed is based on the determination of a model which computes the total head losses in pump operation with the help of the pump geometry. Then, this model is applied to determine the characteristics in turbine operation. The pump model has been divided in elements connected in series and in parallel from the inlet to the exit of the pump. The calculation of hydraulic losses in each element (friction losses, bend losses, gradual expansion and contraction, sudden expansion or contraction) has been performed and the sum of those gives the total head losses through the pump. For this project, 5 pump geometries have been used in order to verify the model. One belongs to the EIG and measure-ments have been performed to determine the geometry and the pump and turbine characteristics. The other 4 geometries and their characteristics have been provided by Sulzer Pumps. As results, the model of losses allows a prediction of the head at the best efficiency point (BEP) in pump operation with a shift between 4 and 5 %. In turbine operation, by comparing the turbine characteristics predicted and the experimental data, a shift from 2 to 5% is observed at the BEP. A software programmed in Excel has been developed and it will be available for free use. At the HEVS, a laboratory test rig has been built and is composed of a permanent magnet synchronous generator as well as a frequency converter developed at this institution. The test rig allows testing the control algorithms. The results show a good efficiency at part load operation. A paper concerning this generator has been published.

Auftragnehmer/Contractant/Contraente/Contractor:


Autorschaft/Auteurs/Autori/Authors:
Dubas,Michel
Arpe,Jorge
Prénat,Jean
Biner,Hans-Peter

Documents annexés

• Projet Caractéristiques des pompes fonctionnant en turbines - Rapport final (phase 1) [PDF] 714 kB