Ravi Krishnaiah

Bio: Ravi Krishnaiah is an academic researcher from VIT University. The author has contributed to research in topics: Lean burn & Spark-ignition engine. The author has an hindex of 2, co-authored 4 publications receiving 11 citations.

A review on air cooled and air centric hybrid thermal management techniques for Li-ion battery packs in electric vehicles

Abstract: Electric vehicles (EVs) are steadily replacing the internal combustion engine vehicles in response to the problem of rising environmental pollution due to the emission of greenhouse gases. The introduction of EVs and hybrid EVs has increased the demand for efficient storage devices which can facilitate fast charging, high energy density and high specific power output. Lithium-ion batteries (LiBs) are widely used in EVs for storage applications. However, heat generated in LiBs due to electrochemical reactions and Joule heating can lead to degradation and impair the performance of LiBs. It is important to maintain the operational temperature within a desired range and this is realized using battery thermal management systems (BTMS). A review on air cooled and air centric hybrid BTMS is presented. The thermal performance of air cooled and hybrid air cooled BTMS for different design and operating conditions is reviewed in detail and a comparative assessment of the performance of these systems in terms of the reduction in maximum temperature and reduction in temperature non-uniformity inside the battery module is presented. The review is aimed at providing useful directions towards the design and development of air-cooled hybrid BTMS which require less weight and complexity, and hence consumes lower parasitic power.

An Overview of the Classification, Production and Utilization of Biofuels for Internal Combustion Engine Applications

Abstract: Biofuel, a cost-effective, safe, and environmentally benign fuel produced from renewable sources, has been accepted as a sustainable replacement and a panacea for the damaging effects of the exploration for and consumption of fossil-based fuels. The current work examines the classification, generation, and utilization of biofuels, particularly in internal combustion engine (ICE) applications. Biofuels are classified according to their physical state, technology maturity, the generation of feedstock, and the generation of products. The methods of production and the advantages of the application of biogas, bioalcohol, and hydrogen in spark ignition engines, as well as biodiesel, Fischer–Tropsch fuel, and dimethyl ether in compression ignition engines, in terms of engine performance and emission are highlighted. The generation of biofuels from waste helps in waste minimization, proper waste disposal, and sanitation. The utilization of biofuels in ICEs improves engine performance and mitigates the emission of poisonous gases. There is a need for appropriate policy frameworks to promote commercial production and seamless deployment of these biofuels for transportation applications with a view to guaranteeing energy security.

Lubrication, emissions, and performance analyses of LPG and petrol in a motorbike engine: a comparative study

Abstract: The increased level of air pollution has caused the automobile industry to investigate alternate greener fuels to make vehicles more environmentally friendly. This study focuses on the perf...