10.15159/AR.18.016
Vaculik, P.
P.
Vaculik
Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings
Prikry, M.
M.
Prikry
Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings
Bradna, J.
J.
Bradna
Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings
Libich, L.
L.
Libich
Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings
Energy consumption of milking pump controlled by frequency convertor during milking cycle
Agronomy Research
2018
milking cycle
vacuum system
vacuum pump
frequency convertor
energy consumption
article
2018
en
http://hdl.handle.net/10492/3819
1406-894X
446.0Kb
PDF
Copyright 2009 by Estonian University of Life Sciences, Latvia University of Agriculture, Aleksandras Stulginskis University, Lithuanian Research Centre for Agriculture and Forestry. No part of this publication may be reproduced or transmitted in any form, or by any means, electronic or mechanical, incl. photocopying, electronic recording, or otherwise without the prior written permission from the Estonian University of Life Sciences, Latvia University of Agriculture, Aleksandras Stulginskis University, Lithuanian Research Centre for Agriculture and Forestry
The article deals with selected parameters affecting the energy consumption of a vacuum pump in a milking system during the whole milking cycle in variants with and without regulation by a frequency convertor. When put into practice, the latest research of creation, control and stabilization of vacuum in milking devices allows dairy farmers to obtain a vacuum system that ensures maximum stability of milking pressure, which is a basic requirement affecting the health of dairy cows. The choice of vacuum system prioritizes in particular high performance, maximum operational reliability, minimum maintenance, long service life, environmental friendliness and economy. The vacuum pump was a Roots vacuum pump with a rotary piston which is typical for this use. Use of a frequency convertor significantly affected the efficiency of this pump for control of vacuum pressure level and pump performance by varying the rotation frequency according to the actual airflow requirement. Using this control system, only as much vacuum pressure is produced as necessary. By measurement of an experimental setup, it was found that the average power requirement of a setup with a control valve was 3.8 kW compared to 1.7 kW in the case of the variant with frequency convertor. Measurements and calculations have shown that this system is capable of saving more than 50% of electric energy.