Session: 37-06 Pumps and Hydraulic Systems 1

Paper Number: 82627

82627 - Potential and Evolution of Miniatures Compressed Air Energy Storage Plants Based on Impulse Turbine 

Abstract

This paper describes the work carried out to develop an impulse turbine for miniatures compressed air system. This study hypothesizes the question; what is the effect of combining an impulse turbine loss model into a compressed air energy storage system analysis? Miniature power system has lower mass flow rates which lead to small turbine size. The miniature impulse turbine has relatively low efficiency and highly sensitive to operating conditions at low mass flow rate due to all losses in terms of passage, trailing edge, incidence and clearance, which have become a higher amount compared to the total losses of the percentage foundation.

The aim of the current work is to present a new miniatures scale of the CAES (compressed air energy storage) system based on impulse turbine for distributed power generation applications. Moreover, this study is an attempt to provide an understanding of the miniature compressed air systems characteristic and performance based on impulse turbine. A new impulse turbine was designed, simulated and integrated with thermodynamic analysis of the miniature CAES storage system. The mean line design (i.e. one-dimensional design) and three dimensional in terms of three-dimensional computational fluid dynamics technique were employed to investigate the turbine power output and efficiency which in turn combined with thermodynamic analysis of the CAES system to calculate the system thermal efficiency. Where the impulse turbine in single stage configuration was designed and analyzed using one-dimensional design and three-dimensional simulations for a range of operating conditions in terms of pressures, temperatures, mass flow rate and rotational speeds. The initial stage geometry of the RIT (i.e. nozzle and rotor) from the EES code were inputted into the module of blade design in ANSYS^®18.2 workbench (i.e. Blade-Gen) to create the three-dimensional blade configuration of the nozzle blades and rotor blades. Three-dimensional simulations for miniature impulse turbine developed from meanline design was carried out based ANSYS^®18.2-CFX. The impulse turbine geometry obtained from the preliminary design in terms of inlet hub radius, blade height, tip radius, and angles of blade…. etc. were employed to generate the impulse turbine stage (i.e., nozzle and rotor). The simulations results showed that the maximum efficiency and power were 65.93% and 4.019 kW, respectively with mass flow rate 0.2 kg/s. The energy analysis revealed that the system efficiency was 10.3%. These results showed the possibility of using the impulse turbine in the miniature applications of the CAES system. Consequently, the design approaches can be used to develop this system using the impulse turbine configuration.

Presenting Author: Till Biedermann Institute of Sound and Vibration Engineering, University of Applied Sciences Düsseldorf

Presenting Author Biography: Affiliated with the Institute of Sound and Vibration Engineering ISAVE, I work as a research associate on topics as e.g. aerodynamics, aeroacoustics and vibroacoustics. Here, we use experimental and numerical methods to solve industry-related problems as well as to conduct more rudimentary studies in the underlying physical effect of noise, flow and vibration.

Authors:

Laith Al-Sadawi University of Technology- Iraq
Ayad Al Jubori University of Technology Iraq
Till Biedermann Institute of Sound and Vibration Engineering, University of Applied Sciences Düsseldorf
Suliman Alfarawi Mechanical Engineering Department, University of Benghazi