Towards the Development of Miniature Scale Liquid Fuel Combustors for Power Generation Application—A Review

Author:

Sankar Vinay1ORCID,Sudarsanan Sreejith2,Mukhopadhyay Sudipto1ORCID,Selvaraj Prabhu2ORCID,Balakrishnan Aravind3,Velamati Ratna Kishore2ORCID

Affiliation:

1. Department of Mechanical Engineering, Indian Institute of Technology Jodhpur, Rajasthan 342037, India

2. Department of Mechanical Engineering, Amrita School of Engineering Coimbatore, Amrita Vishwa Vidyapeetham, Tamil-Nadu 641112, India

3. Department of Aerospace Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India

Abstract

As the demand for powerful, light energy sources continues to grow, traditional electrochemical batteries are no longer sufficient and combustion-based power generation devices have become an attractive alternative due to their high energy density, compact size, fast recharging time and long service life. While most research on miniature-scale combustors has focused on gaseous fuels, the use of commonly available liquid fuels has the potential to be highly portable and economical. However, the complexity of droplet atomization, evaporation, mixing and burning in a limited volume and short residence time has presented significant challenges for researchers. This review focuses on various methodologies proposed by researchers (like flow burring injector, fuel film injection, injecting into porous media, electrospray and some self-aspirating designs) to overcome these challenges, the combustion behaviour and different instabilities associated with liquid fuels at small scales. The current review intends to present a clear direction to channel the efforts made by researchers to overcome the difficulties associated with liquid fuel combustion at small scales for power generation applications. Additionally, this review aims to give an overview of power systems at the micro and meso scales that operate using liquid fuels. The methodologies introduced like electrospray requires external power, which again makes the system complex. Towards the development of standalone type power generators, the self-aspirating design which makes use of hydrostatic pressure, fuel film injection or taking advantage of exhaust gas enthalpy to preheat and evaporate the liquid fuel are the promising methodologies.

Funder

Science and Engineering Research Board (SERB), Department of Science & Technology (DST), Govt of India

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

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