Publications
A simulation model of a system-based concentrated solar power system (CSP) for maximum solar energy harvesting applications
Feb 10, 2023Journal NTU Journal of Renewable Energy
Publisher NTU
Issue 1
Volume 4
Solar energy has piqued people's curiosity since the dawn of civilization, and the technology for harvesting it has advanced at a rapid pace. The development of technology to increase the efficiency of the solar system is of critical relevance due to the energy difficulties that civilization has been facing. Scientists have used the solar concentrated system for several years since it allows for the concentration of solar energy into a concentrate, allowing for a significant increase in energy efficiency. A parabolic dish setup is described in this article as a dish-shaped concentrating collector that reflects solar energy onto a receiver located at the focal point. This concentrator is set atop a framework with assumption of a two-axis tracking system to track the sunlight. Typically, the acquired heat is utilized directly by a heat engine constructed on the receiver that travels with the dish. Typically, the acquired heat is utilized directly by a heat engine constructed on the receiver that travels with the dish. The suggested dish could achieve very high temperatures and might be utilized in solar reactors to generate high-temperature solar fuels. Even though dishes are seldom utilized commercially for power production, engines are now favored for power conversion. Consequently, the purpose of this study is to explain the benefits of this technology in a world where fossil fuel usage is a genuine issue that society must address.
Effects of Weather and Environmental Conditions on the Power Productivity of Photovoltaic Module in Kirkuk City
Feb 10, 2023Journal NTU Journal of Renewable Energy
Publisher NTU
Issue 1
Volume 4
From the beginning of March to the end of August 2022, research is conducted to determine how sensitive monocrystalline solar modules are to variations in environmental factors such as dust and high temperature buildup as well as cloud cover in Kirkuk's environment. In order to evaluate how different environmental factors, affect a solar photovoltaic (PV) module, an experiment was conducted using three solar modules that were identical in all respects. The modules are cleaned on a regular basis in the morning in order to monitor the effect that the accumulation of dust will have on the surface of the dirty module during the months of April and May. According to the findings, the collection of dust has a significant impact on the daily energy yield of the module that has not been cleaned. On the other hand, this impact lasts for a very long time. The influence on the cloud cover can be seen very immediately. Because of this constraint, solar photovoltaics (PV) are an unstable source of power for remote devices, which strongly emphasizes the difficulties associated with frequently cleaning the surface of the module.
PVC gel smart sensor for robotics sensing applications: an experimental and finite element simulation study.
Aug 1, 2022Journal Engineering research express
Publisher IOP Publishing
DOI 10.1088/2631-8695/ac852b
Issue 3
Volume 4
Research is now being done on soft electroactive polymers (EAPs), such as polyvinyl chloride (PVC) gel, as an example, for use in soft robotics and smart sensors. Although the sensing behavior of PVC gel has not yet been thoroughly investigated, it has been determined that this material reacts in some way to the stimuli that come from the outside. PVC gels are being utilized to construct a broad variety of different kinds of smart sensors due to the fact that their deformation may be endlessly configured by variations in electrode arrangement, applied mechanical stress, and the amount of plasticizer contained within the gel. In this study, experimental characterizations and the results of finite element simulations are discussed for a PVC gel compression sensor. The finite element simulation of what happens to PVC gel when it is compressed from the outside using mechanical force has been built using the COMSOL Multiphysics, which is a finite element simulation software. Additional experimental measurements of PVC gels are carried out in order to validate the underlying principles that have been presented thus far by providing context for the results of the simulations and to validate the findings effectively. Based on the findings, it appears that the suggested sensor is able to detect compression at a variety of amplitudes and rates . This study sheds light on the sensing capabilities of PVC gel in sensing investigations and provides a framework for conducting such investigations, thereby laying the groundwork for an increase in the use of PVC gel sensors in soft robotics research in the future.
A pressure difference sensor inspired by fish canal lateral line
Jul 29, 2017Journal Bioinspiration & biomimetics
Publisher IOP Publishing
Issue 5
Volume 14
It is of interest to exploit the insight from the lateral line system of fish for flow sensing applications. In this paper, a novel fish canal lateral line-inspired pressure difference sensor is proposed by embedding an ionic polymer-metal composite (IPMC) sensor within a canal filled with viscous fluid. Such a sensor could be used by underwater robots and vehicles for object detection, angle of attack measurement, and source localization. Unlike the biological counterpart that has open ends on the surface of the body, the proposed sensor has two pores covered with a latex membrane, which prevents the canal fluid from mixing with the ambient fluid. The design and fabrication of the sensor are presented, where the sensor is integrated with a fish-like body. The sensor output is experimentally characterized as the fish-like body is rotated with respect to a dipole source, which confirms that the sensor is capable of capturing the pressure difference between the two pores. Finite element modeling and simulation that capture fluid-structure interactions and IPMC physics are conducted to shed light on the sensor behavior. Finally, the utility of the sensor in underwater robotics is illustrated via orienting the fish-like body towards the dipole source using feedback from the proposed sensor.
Ionic polymer-metal composite torsional sensor: physics-based modeling and experimental validation
Jun 12, 2016Journal Smart Materials and Structures
Publisher IOP Publishing
Issue 7
Volume 27
Ionic polymer-metal composites (IPMCs) have intrinsic sensing and actuation properties. Typical IPMC sensors are in the shape of beams and only respond to stimuli acting along beam-bending directions. Rod or tube-shaped IPMCs have been explored as omnidirectional bending actuators or sensors. In this paper, physics-based modeling is studied for a tubular IPMC sensor under pure torsional stimulus. The Poisson–Nernst–Planck model is used to describe the fundamental physics within the IPMC, where it is hypothesized that the anion concentration is coupled to the sum of shear strains induced by the torsional stimulus. Finite element simulation is conducted to solve for the torsional sensing response, where some of the key parameters are identified based on experimental measurements using an artificial neural network. Additional experimental results suggest that the proposed model is able to capture the torsional sensing dynamics for different amplitudes and rates of the torsional stimulus.
Dynamics of omnidirectional IPMC sensor: Experimental characterization and physical modeling
Aug 12, 2015Journal IEEE/ASME Transactions on Mechatronics
Publisher IEEE
Issue 2
Volume 21
Typical ionic polymer-metal composite (IPMC) sensors are in the shape of beams, and only respond to stimuli acting perpendicular to the beam plane. In this paper, we present a novel, omnidirectional, tubular IPMC sensor that responds to all stimuli perpendicular to the tube axis. With one common inner electrode and four outer electrodes, the tubular IPMC sensor provides four routes of common-ground current outputs. With a custom-made setup, the response of each sensor route is characterized under tip deflection in different orientations at frequencies 1-20 Hz, which verifies the sensor's omnidirectional sensing capability and shows little mechanoelectrical coupling between neighboring sensor routes. An analytical dynamic model, in the form of an infinite-dimensional transfer function, is developed for the sensor, which captures the internal ion-transport physics and the effect of contact resistance. Experimental results show that the proposed model is able to capture the tubular sensor dynamics. Finally, the original model is reduced to a finite-dimensional one, based on which an inversion algorithm is used to reconstruct the mechanical stimulus given the sensor output. The effectiveness of the reconstruction approach is demonstrated experimentally.