RUNGTA INTERNATIONAL OF JOURNAL OF MECHANICAL AND AUTOMOBILE ENGINEERING

• Volume 1 (Jan 2024- Dec 2024)
Issue 1

1. Driving the Future: A Comprehensive Analysis of the Transition to Electric Vehicles for Sustainable Mobility

Pradeep kumar-1,

Shaziya Islam-1, Neelabh Sao-2, Irshad Alam-3, Mandeep Kumar-4, Mimshad Alam-5

Author Affiliations
Department of Computer Science & Engineering -Data Science, Rungta College of Technology, Bhilai, India-490023

ABSTRACT:
The escalating environmental impact of conventional internal combustion engine (ICE) vehicles has intensified the global call for cleaner, more sustainable transportation solutions. Electric vehicles (EVs) have emerged as a promising alternative, offering reduced emissions, lower operating costs, and enhanced energy efficiency. This research paper investigates the transition toward electric mobility by analysing technological advancements, policy support, market trends, and socio-economic challenges associated with EV adoption. The primary objective is to evaluate the effectiveness and scalability of EVs in contributing to global sustainability goals. A mixedmethods approach was employed, including an extensive review of academic literature, analysis of global EV adoption statistics, and case studies from EV-leading nations such as Norway, China, and the United States. The findings reveal that while EVs offer substantial environmental benefits and long-term economic advantages, their widespread adoption is constrained by factors such as high initial costs, limited charging infrastructure, and concerns over battery production and disposal.

Keywords: Electric Vehicles (EVs) Sustainable Transportation Environmental Impact Internal Combustion Engine (ICE) Vehicles EV Adoption Technological Advancements

Corresponding author’s email address: k.pradeep.p091@gmail.com

2. Evaluating COP in Marine Applications with Contemporary Refrigerants

Suraj Kumar Bandhekar-1,

Rahul Mishra- 1, Sanjay G. Sakharwade-2, Sameer Singh-3, Kush Kumar Dewangan-4, Anant Kumar-5

Author Affiliations
12345- Department of Mechanical Engineering, Rungta College of Engineering & Technology, Bhilai- 490024

ABSTRACT:
Marine refrigeration systems aboard seagoing vessels and offshore facilities are crucial for maintaining refrigerated containers, cargo hold refrigeration, and domestic refrigeration on cruise ships. The International Maritime Organization’s MARPOL Annex VI restricts the use of refrigerants that deplete the ozone layer in maritime applications. New regulations from the organization mandate that all stakeholders, including crew members and shipowners, transition to using modern refrigerants. Refrigerants such as R1234yf, R1234ze (E), R1234ze (Z), and R1234zd (E) have replaced older alternatives like R407f and R404A. These newer refrigerants have significantly lower global warming potential compared to their traditional counterparts. In this study, the performance of these modern refrigerants in marine applications was assessed analytically, focusing on their Coefficient of Performance (COP). The analysis involved using seawater in the condenser circuit to facilitate heat exchange during the refrigeration cycle. Parametric analyses were conducted at various temperatures with these next-generation refrigerants. The comparison considered factors like COP, safety, and environmental impact. Results indicated that R1234ze (Z) demonstrated superior COP performance compared to the other refrigerants. However, an increase in seawater temperature supplied to the system resulted in a reduction of up to 50% in COP. The study concluded that while modern refrigerants are more environmentally friendly, they show a slight decrease in COP performance.

Keywords: Marine refrigerants, COP, Refrigeration, Low GWP refrigerant

Corresponding author’s email address: suraj.bandhekar@rungta.ac.in

3. Role of Thermal Engineering in 3D Printing Technology: A Review

Rahul Mishra-1, Suraj Kumar Bandhekar-2, Kush Kumar Dewangan-3, Sanjay G Sakharvade-4, Sameer Singh-5, Anant Kumar-6

Author Affiliations
1,2,3,4,5,6- Department of Mechanical Engineering, Rungta College of Engineering and Technology, Bhilai 490024, C.G., India

ABSTRACT:
Thermal engineering plays a crucial role in enhancing the quality and reliability of 3D-printed products. This paper explores how thermal engineering principles impact 3D printing, influencing material behavior, heat transfer, and thermal management strategies. Additive manufacturing (AM), commonly known as 3D printing, has transformed manufacturing by enabling rapid prototyping and customized production. However, the effectiveness and consistency of printed components largely depend on how heat is controlled throughout the process. The present paper highlights the significant contributions of thermal engineering to 3D printing technology, including advancements in thermal control systems and challenges in high-temperature printing. It also examines the integration of thermal models to improve printing precision. Additionally, we discuss the mechanical, thermal, and microstructural properties of composite materials, focusing on metalinfused polymers like polylactic acid (PLA) and acrylonitrile styrene acrylate (ASA). Key challenges such as porosity, optimising thermal conductivity, and managing anisotropic behaviour are addressed, along with potential solutions through improvements in printing parameters and post-processing techniques.

Keywords: 3D Printing, Solidification, Heat Transfer, Composite Material, Cement Technology, etc

Corresponding author’s email address: rahul.mishra@rungta.ac.in

4. Stability analysis of flashing-driven natural circulation loops: Influence of orientation of heaters and coolers

Kush Kumar Dewangan-1,

Sanjay G Sakharwade-1, Sameer Singh-2, Rahul Mishra-3, Suraj Bandhekar-4, Anant Kumar-5

Author Affiliations
12345-Department of Mechanical Engineering, Rungta College of Engineering & Technology, Bhilai, India- 490024

ABSTRACT:
A steady state model has been developed to study the operation of a flashing driven natural circulation loop at low-pressure conditions. The heat transport capacity of the natural circulation loop (NCL) is usually low and depends strongly on the length of the riser. As riser length increases, the tendency of flashing in the adiabatic section of the riser increases as a result of an increase in the density difference between the riser and the downcomer. The position or orientation of the heater and the cooler can be manipulated to modify the driving force for the circulation in the loop. Thereby, the hydrodynamic and heat transport characteristics of the loop can be controlled. One dimensional two-phase homogeneous equilibRUm model (HEM) has been considered for estimating the void fraction in the two-phase region. Circulation with flashing and without flashing in the adiabatic section of the riser has been compared for the steady state condition. This study focuses on the influences of cooler and heater orientations on the performance of flashing driven natural circulation loops. Based on the presented model, it can be predicted that, at low operating pressure, flashing at the unheated riser section has a significant impact on the NCL’s performance. The full paper reports the variation of void fraction, circulation rate, and the limit of operation over a range of working parameters.

Keywords: flashing driven natural circulation loop, two-phase flow, Ledinegg type instability.

Corresponding author’s email address: kush.kumar.dewangan@rungta.ac.in

5. Topology Optimization and Development of Biodegradable ABACA Polymer Composite Leaf-Spring for Electric Vehicles

Avi Raj Singh-1, Abhinav Shrivastava-2, Mahima Nilmarkar-3, Ronit Ranjan-4, Yash Malvai-5, Manish Sah-6

Author Affiliations

13456- Department of Mechanical, Rungta College of Engineering and Technology, Bhilai, India-490023

2- Department of Mechanical, Rungta College of Engineering and Technology, Bhilai, India-490023

ABSTRACT:
This research focuses on the topology optimization and development of a bio-degradable ABACA polymer composite leaf-spring for electric vehicles, aiming to enhance performance while promoting sustainability. The study integrates advanced computational techniques and material science principles to design an optimized, lightweight, and structurally efficient leaf-spring. To achieve optimal design efficiency, topology optimization techniques are employed using a gradient-based algorithm that iteratively removes unnecessary material while maintaining structural integrity. The optimization framework defines the design domain, objective function, and constraints to ensure minimal weight and maximum stiffness. The study then transitions to computational simulations, leveraging Simscale’s cloud-based platform to conduct stress analysis, vibration analysis, and deformation evaluations under real-world loading conditions. The material selection process centers around ABACA polymer composites, known for their high strength-to-weight ratio and biodegradability. The formulation and manufacturing procedures integrate polymer infusion and layering techniques to develop a robust composite structure.

Keywords: Topology Optimization, Bio-Degradable ABACA Polymer Composite, Computational Techniques, Material Science Principles

Corresponding author’s email address: singhaviraj1903@gmail.com

RUNGTA INTERNATIONAL OF JOURNAL OF MECHANICAL AND AUTOMOBILE ENGINEERING