Three-dimensional CFD modeling of two-phase slurry flows is demonstrated in this paper. The flow ... more Three-dimensional CFD modeling of two-phase slurry flows is demonstrated in this paper. The flow domain consists of a vertically oriented annular pipe with outer and inner diameter of 0.125 m and 0.025 m, respectively. A mixture velocity range of 0.0738– 0.197 m/s and overall volumetric concentration range of 0.8%–1.8% with 0.23 mm grain size (dp) are used for the simulation. Eulerian model with Reynolds Stres Model (RSM) for turbulence closure is adopted to analyze the monodispersed sand particles of varying granular diameters. The objective of this work is to study the slurry flow using CFD simulation and validating the simulation with experimental studies available in the literature. The simulated pressure losses are found to be in good agreement with experimental results at different conditions. Pressure drop per meter or pressure gradient increases with flow velocity of mixture but after a peak point pressure gradient decreases with the increasing velocity. This phenomena in vertical annular flow and its reasons are described in this paper. Effects of effulx solid concentration of slurry on pressure gradient is also studied.
Three-dimensional CFD modeling of two-phase slurry flows is shown in this paper through 26mm diam... more Three-dimensional CFD modeling of two-phase slurry flows is shown in this paper through 26mm diameter horizontal pipe for mixture velocity range of 3.5–4.7m/s and overall volumetric concentration range of 9.95%–34% with three grain sizes viz. 0.165, 0.29 and 0.55 mm. Eulerian model with Reynolds Stres Model (RSM) turbulence closure is adopted to analyze the monodispersed sand particles of varying granular diameters and density 2650 kg/m 3. The objective of this work is to analyze the sensitivity slurry flow using CFD simulation and validating the simulation with experimental studies available in the literature. The simulated local solid concentration values and pressure gradients are found to be in good agreement with experimental results at different conditions. Pressure drop per meter or pressure gradient increases with flow velocity of mixture. Effects of grain size on various slurry flow parameters especially on local solid concentration distribution is also studied.
This system is designed for advance Robotic control. It based on sensor data acquisition and soft... more This system is designed for advance Robotic control. It based on sensor data acquisition and software data processing. With those systems controlling a robotic hand by hydraulic and electric means. It is separated by two different sections. First, data acquisition section with differential sensor data (Gyro sensor, Flex sensor, Pressure sensor). Second, software processed data application system consisting of robotic hand. Specialty of this system is it gives precise control of robotic arm following human hand movement. It also gives touch and pressure feelings in robotic hand. A lot of work can be done easily with the help of it. Like this system gives remote bomb disposal, hazardous environmental work remotely, remote operation, remote medical help and so on.
The most important addition of modern science is renewable energy. And the most useful and the mo... more The most important addition of modern science is renewable energy. And the most useful and the most cheaply renewable power generation source is Hydropower. Flowing water creates energy that can be captured and turned into electricity. This is called Hydroelectric power or Hydropower. Hydropower is considered a renewable energy resource because it uses the earth's water cycle to generate electricity. Water evaporates from the earth's surface, forms clouds, precipitates back to earth, and flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of electricity is generated by hydropower. The government has set a target of meeting 5 per cent of the electricity demand by 2015 by utilizing renewable energy and 10 per cent by the year 2020. Currently, renewable energies contribute to less than 1 per cent of the country's total electricity generation .The aim of our analysis is to demonstrate and observe the hydropower of our country in micro-scale by our experimental setup which is completely new in concept .This paper consists results of our findings and we find larger the number of stroke higher the rpm correspondingly higher efficiency. We find maximum rpm for 2stroke when fixed fly wheel weight was 18Kg and water was 10liter. It might help in case of utilizing this renewable energy potential at high scale.
The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impa... more The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impact on today’s successful thermal management. It is an ascending technology to satisfy present requirement of increasing thermal performance. Focusing
on this, an experiment has been done on the open loop pulsating heat pipes (OLPHP) to observe their performance characteristics by using two types of working fluid by varying inclination angles. The experiment is performed on 2.5 mm inner diameter and 3 mm outer diameter OLPHP with an insert of copper wire of 1 mm diameter and fins are added on the condensation section. This investigation is done using methanol and ethanol with 50% filling ratio in OLPHP with 8 loops. In this experiment the effects on the performance of using fins with insert with two different fluids (methanol and ethanol) and the variation of inclination angles are investigated. The results show that the performance characteristics in all the circumstances are better for setup with fin and insert than the normal setup. As higher thermal resistance indicates better performance, so we can say that setup with methanol performs better than ethanol. This performance is best at 45˚ inclination angle. It can be seen that, higher the inclination angle, better the performance and this performance is best at 45˚ inclination angle for this experiment.
Pulsating heat pipe (PHP) is a two-phase thermal control device with arbitrary number of turns wh... more Pulsating heat pipe (PHP) is a two-phase thermal control device with arbitrary number of turns which is basically used for the thermal management of microelectronic devices as there is a requirement of miniaturization of heat exchangers. To fulfill today’s increasing demand of power electronic applications PHP is a proven technology which works on principle of oscillation of the working fluid and phase change phenomenon in a capillary tube. An experimental investigation has been done on both close and open loop pulsating heat pipes by using suitable working fluid to observe their thermal performance. It has performed on 2 mm inner diameter and 2.5 mm outer diameter open and close loop pulsating heat pipe with fin added on the condensation section. The overall experiment is done by using methanol with 50% filling ratio at 0⁰ (vertical) inclination angle on close loop pulsating heat pipe (CLPHP) and open loop pulsating heat pipe (OLPHP) with 8 loops. In both the pipe
evaporation section is 50mm, adiabatic section is 120 mm and condensation section is 80 mm. The main objective of this experiment is to observe the effect of their thermal performance while using fins and without fin i.e. the basic form. The paper attempt theoretical and experimental investigation on the thermo-physical properties of working fluid and will also show the result regarding the significance of using fin on CLPHP and OLPHP.
The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impa... more The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impact on today’s successful thermal management. It is an ascending technology to satisfy present requirement of increasing thermal performance. Focusing on this, an experiment has been done on the close loop pulsating heat pipes (CLPHP) to observe their performance characteristics by
using two working fluids with varying inclination angles of 0⁰ (vertical), 30⁰ and 45⁰. The experiment is performed on 2.5 mm
inner diameter and 3 mm outer diameter CLPHP with an insert of copper wire of 1 mm diameter and fins are added on the
condensation section where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80
mm.This investigation is done using ethanol and methanol with 50% filling ratio in CLPHP with 8 loops. Methanol shows better
performance at 45⁰inclination than ethanol due to their physio chemical properties at different conditions.In this experiment the effects on the performance of using fins with insert and the variation of inclination angles are investigated. The results show the better performance characteristics and enhancement of heat transfer in the present experimental set-up because of using fin and insert.
Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devi... more Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devices for heat transfer
applications, especially suited for thermal management of electronics. A closed loop pulsating heat pipe (CLPHP) made of copper with 2 mm ID and 2.5 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to analyze and compare the effects on the heat transfer performances of CLPHP with finned and un-finned condenser section with inclination angle of 0⁰ (vertical), 30⁰ and 45⁰. Methanol is used as working fluid with 50% filling ratio in CLPHP with 8 loops during the experimentation. The experimental results indicate a strong influence of gravity and thermo physical properties of the working fluid on the performance of the CLPHP studied with different orientation and heat load. The results demonstrate the effect of fin used in condenser section, the input heat flux, inclination angle orientation and physio chemical properties of the working fluid on the thermal performance of the device. The finned CLPHP at 45 inclination exhibits the considerable enhancement of heat transfer compared with that of CLPHP without fin.
Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devi... more Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devices for heat transfer applications, especially suited for thermal management of electronics. A closed loop pulsating heat pipe (CLPHP) made of copper with 2.5 mm ID and 3 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to analyze and compare the effects on the heat transfer performances of CLPHP with finned, fin-inserted and un-finned condenser section with inclination angle of 0 (vertical), 30 and 45. Methanol and Ethanol are used as working fluids with 50% filling ratio in CLPHP with 8 loops during the experimentation. The experimental results indicate a strong influence of gravity and thermo physical properties of the working fluid on the performance of the CLPHP studied with different orientation and heat load. The results demonstrate the effect of fin and fin-insert used in condenser section, the input heat flux, inclination angle orientation and physiochemical properties of the working fluid on the thermal performance of the device. The finned and fin-inserted CLPHP at 45 inclination exhibit the considerable enhancement of heat transfer compared with that of CLPHP without fin. The results indicate that the performance of PHP changes with different fill ratio, orientation and heat load. Better heat transfer performance is obtained from finned pulsating heat pipe with Methanol at 45 inclinations.
Flowing water creates energy that can be captured and turned into electricity. This is
called hyd... more Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower. Hydropower is considered a renewable energy resource because it uses the earth's water cycle to generate electricity. Water evaporates from the earth's surface, forms clouds, precipitates back to earth, and flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of electricity is generated by hydropower. The government has set a target of meeting five percent of the electricity demand by 2015 by utilizing renewable energy, and 10 per cent by the year 2020. Currently, renewable energies contribute to less than one percent of the country's total electricity generation.The aim of our thesis is was to demonstrate and observe the hydropower of our country in micro-scale by our experimental setup which is completely new in concept .this thesis paper consists results of our findings and might help in case of utilizing this renewable energy potential.
Three-dimensional CFD modeling of two-phase slurry flows is demonstrated in this paper. The flow ... more Three-dimensional CFD modeling of two-phase slurry flows is demonstrated in this paper. The flow domain consists of a vertically oriented annular pipe with outer and inner diameter of 0.125 m and 0.025 m, respectively. A mixture velocity range of 0.0738– 0.197 m/s and overall volumetric concentration range of 0.8%–1.8% with 0.23 mm grain size (dp) are used for the simulation. Eulerian model with Reynolds Stres Model (RSM) for turbulence closure is adopted to analyze the monodispersed sand particles of varying granular diameters. The objective of this work is to study the slurry flow using CFD simulation and validating the simulation with experimental studies available in the literature. The simulated pressure losses are found to be in good agreement with experimental results at different conditions. Pressure drop per meter or pressure gradient increases with flow velocity of mixture but after a peak point pressure gradient decreases with the increasing velocity. This phenomena in vertical annular flow and its reasons are described in this paper. Effects of effulx solid concentration of slurry on pressure gradient is also studied.
Three-dimensional CFD modeling of two-phase slurry flows is shown in this paper through 26mm diam... more Three-dimensional CFD modeling of two-phase slurry flows is shown in this paper through 26mm diameter horizontal pipe for mixture velocity range of 3.5–4.7m/s and overall volumetric concentration range of 9.95%–34% with three grain sizes viz. 0.165, 0.29 and 0.55 mm. Eulerian model with Reynolds Stres Model (RSM) turbulence closure is adopted to analyze the monodispersed sand particles of varying granular diameters and density 2650 kg/m 3. The objective of this work is to analyze the sensitivity slurry flow using CFD simulation and validating the simulation with experimental studies available in the literature. The simulated local solid concentration values and pressure gradients are found to be in good agreement with experimental results at different conditions. Pressure drop per meter or pressure gradient increases with flow velocity of mixture. Effects of grain size on various slurry flow parameters especially on local solid concentration distribution is also studied.
This system is designed for advance Robotic control. It based on sensor data acquisition and soft... more This system is designed for advance Robotic control. It based on sensor data acquisition and software data processing. With those systems controlling a robotic hand by hydraulic and electric means. It is separated by two different sections. First, data acquisition section with differential sensor data (Gyro sensor, Flex sensor, Pressure sensor). Second, software processed data application system consisting of robotic hand. Specialty of this system is it gives precise control of robotic arm following human hand movement. It also gives touch and pressure feelings in robotic hand. A lot of work can be done easily with the help of it. Like this system gives remote bomb disposal, hazardous environmental work remotely, remote operation, remote medical help and so on.
The most important addition of modern science is renewable energy. And the most useful and the mo... more The most important addition of modern science is renewable energy. And the most useful and the most cheaply renewable power generation source is Hydropower. Flowing water creates energy that can be captured and turned into electricity. This is called Hydroelectric power or Hydropower. Hydropower is considered a renewable energy resource because it uses the earth's water cycle to generate electricity. Water evaporates from the earth's surface, forms clouds, precipitates back to earth, and flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of electricity is generated by hydropower. The government has set a target of meeting 5 per cent of the electricity demand by 2015 by utilizing renewable energy and 10 per cent by the year 2020. Currently, renewable energies contribute to less than 1 per cent of the country's total electricity generation .The aim of our analysis is to demonstrate and observe the hydropower of our country in micro-scale by our experimental setup which is completely new in concept .This paper consists results of our findings and we find larger the number of stroke higher the rpm correspondingly higher efficiency. We find maximum rpm for 2stroke when fixed fly wheel weight was 18Kg and water was 10liter. It might help in case of utilizing this renewable energy potential at high scale.
The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impa... more The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impact on today’s successful thermal management. It is an ascending technology to satisfy present requirement of increasing thermal performance. Focusing
on this, an experiment has been done on the open loop pulsating heat pipes (OLPHP) to observe their performance characteristics by using two types of working fluid by varying inclination angles. The experiment is performed on 2.5 mm inner diameter and 3 mm outer diameter OLPHP with an insert of copper wire of 1 mm diameter and fins are added on the condensation section. This investigation is done using methanol and ethanol with 50% filling ratio in OLPHP with 8 loops. In this experiment the effects on the performance of using fins with insert with two different fluids (methanol and ethanol) and the variation of inclination angles are investigated. The results show that the performance characteristics in all the circumstances are better for setup with fin and insert than the normal setup. As higher thermal resistance indicates better performance, so we can say that setup with methanol performs better than ethanol. This performance is best at 45˚ inclination angle. It can be seen that, higher the inclination angle, better the performance and this performance is best at 45˚ inclination angle for this experiment.
Pulsating heat pipe (PHP) is a two-phase thermal control device with arbitrary number of turns wh... more Pulsating heat pipe (PHP) is a two-phase thermal control device with arbitrary number of turns which is basically used for the thermal management of microelectronic devices as there is a requirement of miniaturization of heat exchangers. To fulfill today’s increasing demand of power electronic applications PHP is a proven technology which works on principle of oscillation of the working fluid and phase change phenomenon in a capillary tube. An experimental investigation has been done on both close and open loop pulsating heat pipes by using suitable working fluid to observe their thermal performance. It has performed on 2 mm inner diameter and 2.5 mm outer diameter open and close loop pulsating heat pipe with fin added on the condensation section. The overall experiment is done by using methanol with 50% filling ratio at 0⁰ (vertical) inclination angle on close loop pulsating heat pipe (CLPHP) and open loop pulsating heat pipe (OLPHP) with 8 loops. In both the pipe
evaporation section is 50mm, adiabatic section is 120 mm and condensation section is 80 mm. The main objective of this experiment is to observe the effect of their thermal performance while using fins and without fin i.e. the basic form. The paper attempt theoretical and experimental investigation on the thermo-physical properties of working fluid and will also show the result regarding the significance of using fin on CLPHP and OLPHP.
The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impa... more The pulsating heat pipe, a serpentine tube of capillary dimension with many turns, has great impact on today’s successful thermal management. It is an ascending technology to satisfy present requirement of increasing thermal performance. Focusing on this, an experiment has been done on the close loop pulsating heat pipes (CLPHP) to observe their performance characteristics by
using two working fluids with varying inclination angles of 0⁰ (vertical), 30⁰ and 45⁰. The experiment is performed on 2.5 mm
inner diameter and 3 mm outer diameter CLPHP with an insert of copper wire of 1 mm diameter and fins are added on the
condensation section where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80
mm.This investigation is done using ethanol and methanol with 50% filling ratio in CLPHP with 8 loops. Methanol shows better
performance at 45⁰inclination than ethanol due to their physio chemical properties at different conditions.In this experiment the effects on the performance of using fins with insert and the variation of inclination angles are investigated. The results show the better performance characteristics and enhancement of heat transfer in the present experimental set-up because of using fin and insert.
Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devi... more Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devices for heat transfer
applications, especially suited for thermal management of electronics. A closed loop pulsating heat pipe (CLPHP) made of copper with 2 mm ID and 2.5 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to analyze and compare the effects on the heat transfer performances of CLPHP with finned and un-finned condenser section with inclination angle of 0⁰ (vertical), 30⁰ and 45⁰. Methanol is used as working fluid with 50% filling ratio in CLPHP with 8 loops during the experimentation. The experimental results indicate a strong influence of gravity and thermo physical properties of the working fluid on the performance of the CLPHP studied with different orientation and heat load. The results demonstrate the effect of fin used in condenser section, the input heat flux, inclination angle orientation and physio chemical properties of the working fluid on the thermal performance of the device. The finned CLPHP at 45 inclination exhibits the considerable enhancement of heat transfer compared with that of CLPHP without fin.
Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devi... more Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devices for heat transfer applications, especially suited for thermal management of electronics. A closed loop pulsating heat pipe (CLPHP) made of copper with 2.5 mm ID and 3 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to analyze and compare the effects on the heat transfer performances of CLPHP with finned, fin-inserted and un-finned condenser section with inclination angle of 0 (vertical), 30 and 45. Methanol and Ethanol are used as working fluids with 50% filling ratio in CLPHP with 8 loops during the experimentation. The experimental results indicate a strong influence of gravity and thermo physical properties of the working fluid on the performance of the CLPHP studied with different orientation and heat load. The results demonstrate the effect of fin and fin-insert used in condenser section, the input heat flux, inclination angle orientation and physiochemical properties of the working fluid on the thermal performance of the device. The finned and fin-inserted CLPHP at 45 inclination exhibit the considerable enhancement of heat transfer compared with that of CLPHP without fin. The results indicate that the performance of PHP changes with different fill ratio, orientation and heat load. Better heat transfer performance is obtained from finned pulsating heat pipe with Methanol at 45 inclinations.
Flowing water creates energy that can be captured and turned into electricity. This is
called hyd... more Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower. Hydropower is considered a renewable energy resource because it uses the earth's water cycle to generate electricity. Water evaporates from the earth's surface, forms clouds, precipitates back to earth, and flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of electricity is generated by hydropower. The government has set a target of meeting five percent of the electricity demand by 2015 by utilizing renewable energy, and 10 per cent by the year 2020. Currently, renewable energies contribute to less than one percent of the country's total electricity generation.The aim of our thesis is was to demonstrate and observe the hydropower of our country in micro-scale by our experimental setup which is completely new in concept .this thesis paper consists results of our findings and might help in case of utilizing this renewable energy potential.
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Papers by Rasel A Sultan
on this, an experiment has been done on the open loop pulsating heat pipes (OLPHP) to observe their performance characteristics by using two types of working fluid by varying inclination angles. The experiment is performed on 2.5 mm inner diameter and 3 mm outer diameter OLPHP with an insert of copper wire of 1 mm diameter and fins are added on the condensation section. This investigation is done using methanol and ethanol with 50% filling ratio in OLPHP with 8 loops. In this experiment the effects on the performance of using fins with insert with two different fluids (methanol and ethanol) and the variation of inclination angles are investigated. The results show that the performance characteristics in all the circumstances are better for setup with fin and insert than the normal setup. As higher thermal resistance indicates better performance, so we can say that setup with methanol performs better than ethanol. This performance is best at 45˚ inclination angle. It can be seen that, higher the inclination angle, better the performance and this performance is best at 45˚ inclination angle for this experiment.
evaporation section is 50mm, adiabatic section is 120 mm and condensation section is 80 mm. The main objective of this experiment is to observe the effect of their thermal performance while using fins and without fin i.e. the basic form. The paper attempt theoretical and experimental investigation on the thermo-physical properties of working fluid and will also show the result regarding the significance of using fin on CLPHP and OLPHP.
using two working fluids with varying inclination angles of 0⁰ (vertical), 30⁰ and 45⁰. The experiment is performed on 2.5 mm
inner diameter and 3 mm outer diameter CLPHP with an insert of copper wire of 1 mm diameter and fins are added on the
condensation section where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80
mm.This investigation is done using ethanol and methanol with 50% filling ratio in CLPHP with 8 loops. Methanol shows better
performance at 45⁰inclination than ethanol due to their physio chemical properties at different conditions.In this experiment the effects on the performance of using fins with insert and the variation of inclination angles are investigated. The results show the better performance characteristics and enhancement of heat transfer in the present experimental set-up because of using fin and insert.
applications, especially suited for thermal management of electronics. A closed loop pulsating heat pipe (CLPHP) made of copper with 2 mm ID and 2.5 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to analyze and compare the effects on the heat transfer performances of CLPHP with finned and un-finned condenser section with inclination angle of 0⁰ (vertical), 30⁰ and 45⁰. Methanol is used as working fluid with 50% filling ratio in CLPHP with 8 loops during the experimentation. The experimental results indicate a strong influence of gravity and thermo physical properties of the working fluid on the performance of the CLPHP studied with different orientation and heat load. The results demonstrate the effect of fin used in condenser section, the input heat flux, inclination angle orientation and physio chemical properties of the working fluid on the thermal performance of the device. The finned CLPHP at 45 inclination exhibits the considerable enhancement of heat transfer compared with that of CLPHP without fin.
Books by Rasel A Sultan
called hydroelectric power or hydropower. Hydropower is considered a renewable
energy resource because it uses the earth's water cycle to generate electricity. Water
evaporates from the earth's surface, forms clouds, precipitates back to earth, and
flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of
electricity is generated by hydropower. The government has set a target of meeting
five percent of the electricity demand by 2015 by utilizing renewable energy, and 10
per cent by the year 2020. Currently, renewable energies contribute to less than one
percent of the country's total electricity generation.The aim of our thesis is was to
demonstrate and observe the hydropower of our country in micro-scale by our
experimental setup which is completely new in concept .this thesis paper consists
results of our findings and might help in case of utilizing this renewable energy
potential.
on this, an experiment has been done on the open loop pulsating heat pipes (OLPHP) to observe their performance characteristics by using two types of working fluid by varying inclination angles. The experiment is performed on 2.5 mm inner diameter and 3 mm outer diameter OLPHP with an insert of copper wire of 1 mm diameter and fins are added on the condensation section. This investigation is done using methanol and ethanol with 50% filling ratio in OLPHP with 8 loops. In this experiment the effects on the performance of using fins with insert with two different fluids (methanol and ethanol) and the variation of inclination angles are investigated. The results show that the performance characteristics in all the circumstances are better for setup with fin and insert than the normal setup. As higher thermal resistance indicates better performance, so we can say that setup with methanol performs better than ethanol. This performance is best at 45˚ inclination angle. It can be seen that, higher the inclination angle, better the performance and this performance is best at 45˚ inclination angle for this experiment.
evaporation section is 50mm, adiabatic section is 120 mm and condensation section is 80 mm. The main objective of this experiment is to observe the effect of their thermal performance while using fins and without fin i.e. the basic form. The paper attempt theoretical and experimental investigation on the thermo-physical properties of working fluid and will also show the result regarding the significance of using fin on CLPHP and OLPHP.
using two working fluids with varying inclination angles of 0⁰ (vertical), 30⁰ and 45⁰. The experiment is performed on 2.5 mm
inner diameter and 3 mm outer diameter CLPHP with an insert of copper wire of 1 mm diameter and fins are added on the
condensation section where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80
mm.This investigation is done using ethanol and methanol with 50% filling ratio in CLPHP with 8 loops. Methanol shows better
performance at 45⁰inclination than ethanol due to their physio chemical properties at different conditions.In this experiment the effects on the performance of using fins with insert and the variation of inclination angles are investigated. The results show the better performance characteristics and enhancement of heat transfer in the present experimental set-up because of using fin and insert.
applications, especially suited for thermal management of electronics. A closed loop pulsating heat pipe (CLPHP) made of copper with 2 mm ID and 2.5 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to analyze and compare the effects on the heat transfer performances of CLPHP with finned and un-finned condenser section with inclination angle of 0⁰ (vertical), 30⁰ and 45⁰. Methanol is used as working fluid with 50% filling ratio in CLPHP with 8 loops during the experimentation. The experimental results indicate a strong influence of gravity and thermo physical properties of the working fluid on the performance of the CLPHP studied with different orientation and heat load. The results demonstrate the effect of fin used in condenser section, the input heat flux, inclination angle orientation and physio chemical properties of the working fluid on the thermal performance of the device. The finned CLPHP at 45 inclination exhibits the considerable enhancement of heat transfer compared with that of CLPHP without fin.
called hydroelectric power or hydropower. Hydropower is considered a renewable
energy resource because it uses the earth's water cycle to generate electricity. Water
evaporates from the earth's surface, forms clouds, precipitates back to earth, and
flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of
electricity is generated by hydropower. The government has set a target of meeting
five percent of the electricity demand by 2015 by utilizing renewable energy, and 10
per cent by the year 2020. Currently, renewable energies contribute to less than one
percent of the country's total electricity generation.The aim of our thesis is was to
demonstrate and observe the hydropower of our country in micro-scale by our
experimental setup which is completely new in concept .this thesis paper consists
results of our findings and might help in case of utilizing this renewable energy
potential.