Nishigandha Patel | MIT PUNE (original) (raw)

Uploads

Papers by Nishigandha Patel

International Research Journal on Advanced Science Hub, Dec 29, 2023

Springer eBooks, Sep 22, 2023

Springer eBooks, Sep 22, 2023

Applied Thermal Engineering, 2011

In this study, a compression ignition (CI) engine operated with n-Butane blended di-methyl ether ... more In this study, a compression ignition (CI) engine operated with n-Butane blended di-methyl ether (DME) fuel was experimentally investigated. Specifically, the performance, emissions characteristics, and combustion stability of a CI engine fueled with n-Butane blended DME fuel were examined at 1500 rpm. All the experimental results were compared to the results of diesel fuel with the same experimental conditions. The percentage of n-Butane in the fuel blend ranged from 0 to 40% by mass. The results showed that stable engine operation was possible for a wide range of engine loads up to 30% n-Butane by mass. The engine power output and fuel consumption were improved with the blended fuel since the energy content of n-Butane is much higher than that of DME. Exhaust emission measurements showed that when the blended fuels at low engine loads were used, hydrocarbon and CO emissions increased due to partial burn from over-mixing. Soot and NOx emissions were comparable for all blends. Our results on engine power output and exhaust emissions demonstrate that blended fuels up to 30% n-Butane by mass can be used as an alternative to diesel in a CI engine, and n-Butane blended DME fuel has the potential to enlarge the DME market.

International Journal of Recent Technology and Engineering (IJRTE)

The issue of vehicle accidents due to human error and behavior (rash driving, drink and drive, et... more The issue of vehicle accidents due to human error and behavior (rash driving, drink and drive, etc.) is on rising resulting into fatality and economical loss. In order to overcome these issues, the autonomous vehicle is being explored as a probable solution. Driver will be replaced by AI based autonomous system; The main objective is to convert the manual operated EV into autonomous vehicle. The project work is divided into three main parts i.e., Control System for Vehicle Control, AI (Artificial Intelligence) and UI (User Interface). The main objective of User Interface is to give information regarding vehicles health i.e. battery remaining, charging time, distance to be covered, etc. AI will be use as decision making system or we can say brain of the autonomous vehicle. System Control or Vehicle Control System is to control the vehicle’s steering, acceleration and braking system with the help of PID controller while the vehicle is being operated in autonomous mode. The main purpos...

Frontiers in Mechanical Engineering

Conventional cold storage systems increase the risk of damage and are no longer used for the long... more Conventional cold storage systems increase the risk of damage and are no longer used for the long-term storage of agricultural products. Thus, newer affordable and energy-efficient storage systems are required for enhancing the shelf life of farm produce. We investigated the coefficient of performance (COP) of an earthen clay pot refrigerator with a thermoelectric cooler (TEC) and explored cooling strategies to enhance cooling and electrical performance for increasing the shelf life of farm produce. We used MATLAB Simulink to analyze Peltier TEC module efficiency. The intrinsic characteristics, including the Seebeck coefficient (α), thermal conductivity (K), and electrical resistance (R), were determined, forming the basis of the Peltier module in MATLAB Simulink. Thermal characteristics such as COP and cooling capacity were studied as a function of system voltage (Vin) and current (Iin). The model was equipped with a 12 V/6 A, 60 W TEC and was verified by simulation investigation. ...

This review paper highlights the various aspects of a robotic arm after reviewing several success... more This review paper highlights the various aspects of a robotic arm after reviewing several successful research papers on manipulators.[26] Nowadays, Robotic arms are being used in industries to minimize the human errors and increase efficiency, productivity, precision of the operations taking place. One of the most important advantages of introducing Robotic arm in Industries is that it can work in crucial conditions like high temperatures, pressures where it's risky for humans to work.[11] Since a manipulator comes under Flexible Automation, they can be updated and modified easily. We have referred several research papers which have been experimentally verified to observe the different types of controllers used and different methodologies used by different authors to decide the degrees of freedom of a manipulator used for the picking of an object and placing it at specified position. Thus, knowledge acquainted after referring all these papers, will help in Designing the Robotic arm.[26]

Techno-Societal 2020, 2021

The mitticool refrigerator works on the principle of evaporative cooling which keeps the fruits, ... more The mitticool refrigerator works on the principle of evaporative cooling which keeps the fruits, vegetables and dairy products fresh. Mitticool refrigerator works well in hot and dry weather without electricity. The current study investigates the efficiency of mitticool refrigerator with decrease in inner temperature with respect to outer wind velocity and relative humidity. The study is further extended to different compartments and walls of the refrigerator to calculate the performance of the mitticool refrigerator for different seasons. The results showed that the refrigeration effect achieved in the mitticool refrigerator depends on ambient temperature and humidity. The maximum refrigeration effect achieved in summer is 4.5 °C due to high Dry bulb temperature (DBT). The minimum refrigeration effect achieved in winter is 2.5 °C due to low DBT. It is also observed that in the rainy season, refrigeration effect is 3 °C due to high relative humidity. The refrigeration effect at day ...

International Journal of Current Engineering and Technology

Micromixing technology has experienced rapid development in the past few years. Micromixers repre... more Micromixing technology has experienced rapid development in the past few years. Micromixers represent one of the essential components in integrated microfluidic systems for chemical, biological and medical applications In general, macro-scale mixing is achieved with turbulence while mixing in micro-scale is done by diffusion. This is due to low Reynolds number i.e laminar behavior of the flow in micro channels. Micro-mixer with obstacles located on the channel wall as well as waveform configurations are used to enhance mixing in the channel, so as to reduce the mixing length. Micro channels with different geometric layout and with different shapes and sizes of obstacles such as rectangular, triangular and semicircular enhance their mixing length. The triangular obstacles within the T as well as Y channel gave minimum mixing length for the same distance between the obstacles. The commercial computational fluid dynamics tool for micro-fluidics, known as Comsol multyphysics, is used to study the effect of different configuration on pressure drop as well as to study the mixing of two fluids in different configurations. Computational fluid dynamics (CFD) is often used to rigorously examine the influence of the shape of microchannels on mass transport phenomena in the flow field. Fabrication of micro channels is done on PDMS and Photochemical Machining. The fabrication of microfluidic by PDMS is easier and more flexible than in silicon or glass. The use of PDMS as a material reduces the time, complexity, and cost of prototyping. It is observed that mixing length required for Plain channel without obstacle is more than channel with obstacles. Because due to obstacles, turbulence is created at tip of obstacles which increases mixing rate.

International Research Journal on Advanced Science Hub, Dec 29, 2023

Springer eBooks, Sep 22, 2023

Springer eBooks, Sep 22, 2023

Applied Thermal Engineering, 2011

In this study, a compression ignition (CI) engine operated with n-Butane blended di-methyl ether ... more In this study, a compression ignition (CI) engine operated with n-Butane blended di-methyl ether (DME) fuel was experimentally investigated. Specifically, the performance, emissions characteristics, and combustion stability of a CI engine fueled with n-Butane blended DME fuel were examined at 1500 rpm. All the experimental results were compared to the results of diesel fuel with the same experimental conditions. The percentage of n-Butane in the fuel blend ranged from 0 to 40% by mass. The results showed that stable engine operation was possible for a wide range of engine loads up to 30% n-Butane by mass. The engine power output and fuel consumption were improved with the blended fuel since the energy content of n-Butane is much higher than that of DME. Exhaust emission measurements showed that when the blended fuels at low engine loads were used, hydrocarbon and CO emissions increased due to partial burn from over-mixing. Soot and NOx emissions were comparable for all blends. Our results on engine power output and exhaust emissions demonstrate that blended fuels up to 30% n-Butane by mass can be used as an alternative to diesel in a CI engine, and n-Butane blended DME fuel has the potential to enlarge the DME market.

International Journal of Recent Technology and Engineering (IJRTE)

The issue of vehicle accidents due to human error and behavior (rash driving, drink and drive, et... more The issue of vehicle accidents due to human error and behavior (rash driving, drink and drive, etc.) is on rising resulting into fatality and economical loss. In order to overcome these issues, the autonomous vehicle is being explored as a probable solution. Driver will be replaced by AI based autonomous system; The main objective is to convert the manual operated EV into autonomous vehicle. The project work is divided into three main parts i.e., Control System for Vehicle Control, AI (Artificial Intelligence) and UI (User Interface). The main objective of User Interface is to give information regarding vehicles health i.e. battery remaining, charging time, distance to be covered, etc. AI will be use as decision making system or we can say brain of the autonomous vehicle. System Control or Vehicle Control System is to control the vehicle’s steering, acceleration and braking system with the help of PID controller while the vehicle is being operated in autonomous mode. The main purpos...

Frontiers in Mechanical Engineering

Conventional cold storage systems increase the risk of damage and are no longer used for the long... more Conventional cold storage systems increase the risk of damage and are no longer used for the long-term storage of agricultural products. Thus, newer affordable and energy-efficient storage systems are required for enhancing the shelf life of farm produce. We investigated the coefficient of performance (COP) of an earthen clay pot refrigerator with a thermoelectric cooler (TEC) and explored cooling strategies to enhance cooling and electrical performance for increasing the shelf life of farm produce. We used MATLAB Simulink to analyze Peltier TEC module efficiency. The intrinsic characteristics, including the Seebeck coefficient (α), thermal conductivity (K), and electrical resistance (R), were determined, forming the basis of the Peltier module in MATLAB Simulink. Thermal characteristics such as COP and cooling capacity were studied as a function of system voltage (Vin) and current (Iin). The model was equipped with a 12 V/6 A, 60 W TEC and was verified by simulation investigation. ...

This review paper highlights the various aspects of a robotic arm after reviewing several success... more This review paper highlights the various aspects of a robotic arm after reviewing several successful research papers on manipulators.[26] Nowadays, Robotic arms are being used in industries to minimize the human errors and increase efficiency, productivity, precision of the operations taking place. One of the most important advantages of introducing Robotic arm in Industries is that it can work in crucial conditions like high temperatures, pressures where it's risky for humans to work.[11] Since a manipulator comes under Flexible Automation, they can be updated and modified easily. We have referred several research papers which have been experimentally verified to observe the different types of controllers used and different methodologies used by different authors to decide the degrees of freedom of a manipulator used for the picking of an object and placing it at specified position. Thus, knowledge acquainted after referring all these papers, will help in Designing the Robotic arm.[26]

Techno-Societal 2020, 2021

The mitticool refrigerator works on the principle of evaporative cooling which keeps the fruits, ... more The mitticool refrigerator works on the principle of evaporative cooling which keeps the fruits, vegetables and dairy products fresh. Mitticool refrigerator works well in hot and dry weather without electricity. The current study investigates the efficiency of mitticool refrigerator with decrease in inner temperature with respect to outer wind velocity and relative humidity. The study is further extended to different compartments and walls of the refrigerator to calculate the performance of the mitticool refrigerator for different seasons. The results showed that the refrigeration effect achieved in the mitticool refrigerator depends on ambient temperature and humidity. The maximum refrigeration effect achieved in summer is 4.5 °C due to high Dry bulb temperature (DBT). The minimum refrigeration effect achieved in winter is 2.5 °C due to low DBT. It is also observed that in the rainy season, refrigeration effect is 3 °C due to high relative humidity. The refrigeration effect at day ...

International Journal of Current Engineering and Technology

Micromixing technology has experienced rapid development in the past few years. Micromixers repre... more Micromixing technology has experienced rapid development in the past few years. Micromixers represent one of the essential components in integrated microfluidic systems for chemical, biological and medical applications In general, macro-scale mixing is achieved with turbulence while mixing in micro-scale is done by diffusion. This is due to low Reynolds number i.e laminar behavior of the flow in micro channels. Micro-mixer with obstacles located on the channel wall as well as waveform configurations are used to enhance mixing in the channel, so as to reduce the mixing length. Micro channels with different geometric layout and with different shapes and sizes of obstacles such as rectangular, triangular and semicircular enhance their mixing length. The triangular obstacles within the T as well as Y channel gave minimum mixing length for the same distance between the obstacles. The commercial computational fluid dynamics tool for micro-fluidics, known as Comsol multyphysics, is used to study the effect of different configuration on pressure drop as well as to study the mixing of two fluids in different configurations. Computational fluid dynamics (CFD) is often used to rigorously examine the influence of the shape of microchannels on mass transport phenomena in the flow field. Fabrication of micro channels is done on PDMS and Photochemical Machining. The fabrication of microfluidic by PDMS is easier and more flexible than in silicon or glass. The use of PDMS as a material reduces the time, complexity, and cost of prototyping. It is observed that mixing length required for Plain channel without obstacle is more than channel with obstacles. Because due to obstacles, turbulence is created at tip of obstacles which increases mixing rate.