Project 1. (2014)
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Welcome to my Projects webpage
Projects
Projects
Design and fabrication of a prototype of six legged robot using crank rocker Mechanism
Design and fabrication of a prototype of six legged robot using crank rocker Mechanism
This is my Bachelors final year project. This project aims to design a six legged robot by modifying the crank rocker mechanism that can walk successfully in uneven terrain. This a solid parts design and assemly plus embedded programming project. The protype is remote controlled. Tools used were Solid edge, C programming, keil compiler, machine shop and soldering lab. Atmel 89S52 miecrocontroller was used for processing. Necessary code was written into microcontroller using Keil compiler software. The robot model is a DC powered ,simple and robust prototype. High power consumption due to heavy and robust body had limited the use of prototype for prolonged duration. Addition of a solar powering chasis and sensers can make this module applicable in natural exploration projects unaccessible by explorers where smooth terrain is unlikely.
Main components of the project and their design
Main components of the project and their design
The main components of the robot were mechanical chasis, RF transmitter module and RF reciever module. The process of their design and fabrication is discussed below.
Design of mechanical body
Design of mechanical body
Each part of the chasis was designed and assembled together using Computer Aided Machine drawing in Solidedge software. the fixed components were joined by arc welding and movable joints were connected using pin to give them rotational motion in single plane.
Transmitter Module
Transmitter Module
this module was used to send the signals to the reciever module sing remote frequency trasmitter. four switched were used to send unique signals for front , back , left and right motion of the robot.
Reciever Module
Reciever Module
The reciever module consisted of the main working circuit of the robot. The signals from the transmitter were recieved from the transmitter by RF reciever, decoded by the Rf decoder to send bit patterns to the microcontroller. as per the input ,the microcontroller calls the different functions mentioned in the code to send its own bit patterns to H-bridge circuit that in turn determines the direction of DC motors connected to the walking mechanism.
Further Scope
Further Scope
addition of sensors and solar pannel.
modification of walker mechanism to give higher range of motions.
use of lighter material for energy efficiency.
Project 2. (2023)
Investigation of viability of PVT integration to the geothermal energy system at Kingston hill business school
This project provides an investigation of impact in annual energy production of PVT installed on a roof top of Kingston University Business School building and change in core temperature of the boreholesystem when combined with the Borehole Heating and cooling system installed at the site based on data analysis of pump parameters, pump input and output, sunlight availability at the site and space available for PVT installation over a yeartime span. tools used for this project were Sketchup software, Solidworks, Ansys fluent, simulink and excel spread sheets.
Site selection and preliminary accessment
Site selection and preliminary accessment
site was selected on the basis of sufficient exposure to sunlight and avilability of Borehole geothermal heating and cooling system. Solar energy data was obtained from www.renewables.ninja website. Heam pump parameters and energy consumption data were obtained from the energy management department of Kinston University. The heat pump was assumed to be working under heading mode when ambiant temperature was less than 15 degree celcius and vice versa.The heating and cooling load on the BTES was calculated based on the electrical energy consumed by geothermal heat pump while heating and cooling mode with the help of heating and cooling COP of the heatpump assumed to be fairly constant over the year.
experimental site
experimental site
the kingston university business school building was chosen for the project as it has sufficient roof top space, proper access to sunlight and brohole heat exchanger system available
PVT module 3D design
PVT module 3D design
PVT module was built in Sketchup with the dimensions of selected PVT module for shadow analysis and space optimization.
Building 3D design for shadow analysis
Building 3D design for shadow analysis
shadow analysis for the proper positioning of PVT modules in the rooftop was done using Sketchup software. Data related to project site building was collected and the 3D design was built in Sketechup for the purpose.
3D modeling of the bore hole for CFD analysis
3D modeling of the bore hole for CFD analysis
3D model of the bore hole sytem was made as per the datat available and CFD analysis for heat transmission was done to determine the thermal resistance of the borehole.
inlet contours
inlet contours
the temperature of inlet temperature of the inlet fluid. A large number of temperature values were taken for simulation
outlet contours
outlet contours
this the result obtained after simulation in Ansys fluent. This value determines the thermal losses inside the borehole from which borehole thermal resistance can be calculated
Thermal resistance of the bole was found to be 0.05026744 K.m/W from the cfd analysis.
simulation od heatflow in the system using Simulink and matlab
simulation od heatflow in the system using Simulink and matlab
Detailed Simulink models were formulated for the simulation of the heat flow. Simulink tools were used o input the weather data, heat pump parameters , heating and cooling loads into the system to get the heat input and output into the system. Power output of the PVT pannels was also determined using weather data , module parameters including temperature coefficient of the module.
Result Analysis
Result Analysis
Analysing the results of the simulation, It was found that combination of PVT to a a heat pump with BTES as heat sink can improve the efficiency of PVT and additionally can improve the core temperature of BTES which is beneficial for a heating dominant heat pump system.
change in maximum electrical output
change in maximum electrical output
significant increment in the electrical efficiency of the module was seen due to cooling effect of Borehole heat exchanger running in conjunction with the Geothermal heat pump. As aresult of this, the electrcal capacity factor of the electrical power plant could be increase from 16.26% to 17.49%
change in thermal profile of the BTES
change in thermal profile of the BTES
significant amount of heat energy was found to be pumped into the borehole system out of waste solar energy that was not utilized for production of solar energy. Over the year, deducting the heat extracted y pump, a net amount of 207632.7593 MJ of thermal energy was found to be pumped into the system resuting an yearly increase of core temperature of BTES by 0.131224 degree Celcius.
Further scopes for study
Further scopes for study
Single year of data is not quite sufficient for studying the effect of change of core temperature to the COP of the heat pump. Simulating the data for multiple year can provide the effect of change in core temperature in COP of heat pump which can be visualised by COP graphs of the heat pump.
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