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Dive into the research topics where Juha Viholainen is active.

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Featured researches published by Juha Viholainen.


World Pumps | 2005

Testing the accuracy of pump flow calculation without metering

Simo Hammo; Juha Viholainen

Simo Hammo, laboratory manager and Juha Viholainen, research assistant from Lappeenranta University of Technology, Finland, define the accuracy of the flow control function of the ABB industrial drive, ACS800 pump control application program 7.1, and study different factors related to flow calculation.


international symposium on power electronics, electrical drives, automation and motion | 2008

Pump operation monitoring applying frequency converter

Tero Ahonen; Risto Tiainen; Juha Viholainen; Jero Ahola; J. Kestila

Variable speed driven (VSD) pumps are nowadays widely used in industry applications. Variable speed pumping improves operational flexibility of the pump drive compared with throttle control. In many cases this results in energy cost savings. Nowadays, the performance of frequency converters allows their use as an intelligent monitoring device for the pump drive. This provides new possibilities for the maintenance and operation personnel. In this article, some functions provided by the frequency converter for pump condition and operation monitoring are explained. The applicability of a frequency converter for monitoring purposes is also discussed.


World Pumps | 2009

VSD – control in simulated systems

Juha Viholainen; E Vakkilainen; J Tolvanen

To reduce the energy consumption of a parallel pumping system the whole pumping process and its components must be monitored. Simulated environments can be used in finding energy saving potential, which could be realized with different technical solutions such as VSD installment or changing speed adjustment methods.


international conference on industrial technology | 2010

Flow control with variable speed drives

Juha Viholainen; Mervi Sihvonen; Jukka Tolvanen

This paper focuses on how integrated flow measurement works on variable speed drives (VSDs) that are used to control the speed of pumps. With the measurement feature it is possible to build a pumping system without using separate flow-meters. Having a system with fewer parts makes it more reliable and also less expensive. The flow can be measured with sufficient accuracy for most purposes. The integrated approach can also help in finding leaking spots in the system.


Energy Conversion and Management | 2010

Estimation of pump operational state with model-based methods

Tero Ahonen; Jussi Tamminen; Jero Ahola; Juha Viholainen; Niina Aranto; Juha Kestila


Energy Efficiency | 2013

Energy-efficient control strategy for variable speed-driven parallel pumping systems

Juha Viholainen; Jussi Tamminen; Tero Ahonen; Jero Ahola; Esa Vakkilainen; Risto Soukka


Energy Efficiency | 2014

Comparison of model-based flow rate estimation methods in frequency-converter-driven pumps and fans

Jussi Tamminen; Juha Viholainen; Tero Ahonen; Jero Ahola; Simo Hammo; Esa Vakkilainen


Archive | 2012

Method and controller for operating a pump system

Jussi Tamminen; Juha Viholainen


Applied Energy | 2016

Regional level approach for increasing energy efficiency

Juha Viholainen; Mika Luoranen; Sanni Väisänen; Antti Niskanen; Mika Horttanainen; Risto Soukka


Energy Efficiency | 2015

Energy efficiency optimizing speed control method for reservoir pumping applications

Tero Ahonen; Jussi Tamminen; Juha Viholainen; Joonas Koponen

Collaboration


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Tero Ahonen

Lappeenranta University of Technology

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Jussi Tamminen

Lappeenranta University of Technology

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Jero Ahola

Lappeenranta University of Technology

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Simo Hammo

Lappeenranta University of Technology

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Esa Vakkilainen

Lappeenranta University of Technology

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Mika Luoranen

Lappeenranta University of Technology

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Risto Soukka

Lappeenranta University of Technology

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Ahti Jaatinen-Värri

Lappeenranta University of Technology

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Aki Grönman

Lappeenranta University of Technology

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Antti Niskanen

Lappeenranta University of Technology

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