Imperial College London
Alternate

ProfessorRicardoMartinez-Botas

Faculty of Engineering, Department of Mechanical Engineering

Associate Dean Industry Partnerships,Prof of Turbomachinery
 
 
 
//

Contact

 

+44 (0)20 7594 7241r.botas Website

 
 
//

Location

 

611City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Romagnoli:2017:10.1016/j.enconman.2016.12.051,
author = {Romagnoli, A and Vorraro, G and Rajoo, S and Copeland, C and Martinez-Botas, R},
doi = {10.1016/j.enconman.2016.12.051},
journal = {Energy Conversion and Management},
pages = {127--141},
title = {Characterization of a supercharger as boosting & turbo-expansion device in sequential multi-stage systems},
url = {http://dx.doi.org/10.1016/j.enconman.2016.12.051},
volume = {136},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This paper proposes a detailed performance analysis and experimental characterization of a high-pressure supercharger in a multi-stage boosting system (turbo-super arrangement). Infact, besides the technical challenges associated with achieving adequate tuning, interoperability and driveability of multi-stage boosting systems, another challenge lies in their performance prediction during engine design. Indeed, performance maps of single boosting systems are usually provided by manufacturers and used as look-up tables in 1-D engine models. Tests are usually conducted in a standalone mode, with no information provided on the behaviour and performance of the combination of more than one boosting device. The supercharger was tested with varying inlet pressures and temperatures matching on-engine operating conditions and the results were then used to assess the effectiveness of 1-D engine models performance prediction when dealing with multi-stage boosting systems. An assessment on heat transfer in superchargers was also carried out together with the analysis on the nature of non-dimensional performance maps when dealing with a pressurized inlet. Finally, the analysis also looked into the opportunity to use the superchargers as expanders (‘expansion mode’) in order to cool the air charge entering the engine. The results showed that there is discrepancy between the efficiency values computed by 1-D engine models and those obtained experimentally under pressurized/heated inlet air conditions; the correction of the efficiency maps for heat transfer plays a significant role in the final measured efficiency and the correction of the maps for varying inlet temperatures must be carried out in order to avoid incurring in apparent efficiencies greater than unity. The experiments on the supercharger in ‘expansion mode’ showed that low isentropic efficiencies can be achieved; despite this, 1-D engine simulations showed that it is possible to achieve savings
AU  - Romagnoli,A
AU  - Vorraro,G
AU  - Rajoo,S
AU  - Copeland,C
AU  - Martinez-Botas,R
DO  - 10.1016/j.enconman.2016.12.051
EP  - 141
PY  - 2017///
SN  - 0196-8904
SP  - 127
TI  - Characterization of a supercharger as boosting & turbo-expansion device in sequential multi-stage systems
T2  - Energy Conversion and Management
UR  - http://dx.doi.org/10.1016/j.enconman.2016.12.051
UR  - http://hdl.handle.net/10044/1/44702
VL  - 136
ER  -
Download