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Performance analysis of a multistage centrifugal pump used in an ORC system

Yang, Yuxin, Zhang, Hongguang, Tian, Guohong, Xu, Yonghong, Wang, Chongyao and Gao, Jianbing (2018) Performance analysis of a multistage centrifugal pump used in an ORC system Journal of Thermal Science.

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Abstract

In an Organic Rankine cycle (ORC) system, the working fluid pump plays an important role in the system performance. This paper focused on the operating characteristics of a multistage centrifugal pump at various speed and condensation conditions. The experimental investigation was carried out to assess the influence of the performance of the pump by the ORC system with special attention to actual net power output, thermal efficiency as well as back work ratio (BWR). The results showed that an increase in the pump speed led to an increase in the mass flow rate and expand in the operating range of the outlet pressure. The mass flow rate decreased nonlinearly with the increase of the outlet pressure from 0.22 to 2.41 MPa; the electric power consumption changed between 151.54 and 2409.34 W and the mechanical efficiency of the pump changed from 7.90% to 61.88% when the pump speed varied from 1160 to 2900 RPM. Furthermore, at lower pump specific speed the ORC system achieved higher thermal efficiency, which suggested that an ultra-low specific speed pump was a promising candidate for an ORC system. The results also suggested that the effects of condensation conditions on the pump performance decreased with the pump speed increasing and BWR was relatively sensitive to the condensation conditions, especially at low pump speed.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Yang, Yuxin
Zhang, Hongguang
Tian, Guohongg.tian@surrey.ac.uk
Xu, Yonghong
Wang, Chongyao
Gao, Jianbingj.gao@surrey.ac.uk
Date : 2018
Copyright Disclaimer : © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2018
Uncontrolled Keywords : Waste heat recovery; Organic Rankine cycle; Multistage centrifugal pump; Operating characteristics; Various condensation conditions; BWR
Related URLs :
Depositing User : Clive Harris
Date Deposited : 20 Aug 2018 08:01
Last Modified : 17 Aug 2019 02:08
URI: http://epubs.surrey.ac.uk/id/eprint/849040

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