DESIGN AND OPERATIONAL CHARTS OF NEW POWER ASSIST AND SEPARATE SHAFT TURBOCHARGER SYSTEM

 للكاتبين :

R. M. Abd El-Maksoud and N. N. Bayomi

Faculty of Eng. Mataria, Helwan University,Cairo, EGYPT

ABSTRACT

The present paper introduces a new power assist and separate shaft turbocharger system. Such

system is configured as the compressor attached to an electric motor while the turbine is

connected to a generator through a clutch. The compressor shaft is connected to the turbine

through another clutch. The two clutches are used to operate the system in power assist or

separate shaft modes according to turbo-charging requirements.

In this paper, demonstrative operational charts of turbocharger turbine and compressor for

two operating modes are presented. Such charts are derived using mathematical procedures

that are recommended to be followed in making a preliminary design of the two turbocharger

components. The procedures are utilized to verify the inlet and exit flow parameters for both

turbine and compressor. The approach enables the process designer to quickly and

realistically estimate different parameters and flow variables. The operating conditions are

solely dependent upon the exhaust gas power as well as the percentage of power assistance

when the turbocharger operates in the power assist mode.

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