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Development of a solar tracking system of a nonelectric power source by using a metal hydride actuator

Published on Dec 1, 2017in Solar Energy4.674
· DOI :10.1016/j.solener.2017.08.056
Shin'ya Obara15
Estimated H-index: 15
(Kitami Institute of Technology),
Kazuhiro Matsumura3
Estimated H-index: 3
+ 3 AuthorsTakanori Suda1
Estimated H-index: 1
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Abstract
Abstract This study develop the solar tracking system of a nonelectric power source by using a metal hydride (MH) actuator with solar radiation drive. The proposed tracking system includes two MH reactors of the same shape that are placed perpendicular to the solar cell array. A shielding plate is installed between the MH reactors to interrupt the solar radiation from each MH reactor. The solar angle of direction changes when there is a temperature difference between the MH reactors. This is because a gap occurs in the equilibrium pressure of the hydrogen sealed hermetically in each reactor, and the actuator angle of direction follows the sun according to this pressure difference. This study also present the result of the proposed system after four months of testing. Moreover, this study examine the wind’s influence on the proposed MH actuator by applying heat fluid simulation. In order to achieve highly reliable solar tracking with the proposed system, excessive cooling by wind should be prevented by installing a windshield.
  • References (12)
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References12
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#1L.M. Fernández-Ahumada (UCO: University of Córdoba (Spain))H-Index: 2
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Abstract This paper presents the analytical deduction of generic and unified equations of the movement of solar tracking systems. These equations reproduce published equations, which only consider the sun position, or the equations of the astronomical movement. As a novelty, these equations are more generic, thus allowing the optimization of the positioning of PV installations where diffuse and reflected irradiance are usable. The analysis of the results obtained criticizes the axiomatic idea – ...
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#1M. Natarajan (VIT University)H-Index: 4
#2T. Srinivas (VIT University)H-Index: 15
Abstract A novel gravity based passive solar tracking mechanism; suitable to a linear solar concentrating collector has been conceptualized, developed, simulated, analyzed and tested experimentally. Attempt has been made to minimize the tracking load and error by controlling in dripping rate or filling rate of liquid in the gravity system. The identified key influencing design parameters in the proposed mechanism are sprocket wheel radius, spring stiffness and tracking radius. Large sprocket whe...
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#1Chao Kai Yang (KUAS: National Kaohsiung University of Applied Sciences)H-Index: 1
#2Tsung Chieh Cheng (KUAS: National Kaohsiung University of Applied Sciences)H-Index: 4
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Abstract An open-looped altitude-azimuth concentrated solar-tracking system without additional power was developed in this study. This system adopted the Fresnel lens module to concentrate sunlight on a Stirling engine’s heating head while conducting measurements for the temperature profile of the heating head. We also installed solar panels on both sides of the solar tracking system to supply power to the driving motors and reduce the torque needed for mechanism operation. The results show that...
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#1George Cristian Lazaroiu (Politehnica University of Bucharest)H-Index: 13
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Abstract Photovoltaic technology allows to directly convert solar energy into electrical energy with clear advantages: no environmental impact during operation, reliability and durability of the systems, reduced operating costs and maintenance, ability to both supply remote customers and simply connect to the electrical network. This paper evaluates the performance of two photovoltaic systems: one fixed and one equipped with a sun tracker. The objective of this research is to analyze the increas...
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#1Mitsuru Sato (Showa University)H-Index: 6
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Abstract A metal hydride (MH) actuator provides mechanical work by applying the hydrogen pressure transition that originates from the reversible reaction of the MH alloy as it absorbs and desorbs hydrogen gas. The MH actuators that have been reported employ a Peltier element or an electrical heating resistance wire as a heat source. This paper describes the design of an MH actuator that is driven by low-quality heat sources, such as solar heat or surplus heat. A certain composition of a LaNi 5 -...
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#1Nelson A. Kelly (GM: General Motors)H-Index: 24
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Abstract This work describes measurements of the solar irradiance made during cloudy periods in order to improve the amount of solar energy captured during such periods. It is well-known that 2-axis tracking, in which solar modules are pointed at the sun, improves the overall capture of solar energy by a given area of modules by 30–50% versus modules with a fixed tilt. On sunny days the direct sunshine accounts for up to 90% of the total solar energy, with the other 10% from diffuse (scattered) ...
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Finding energy sources to satisfy the world's growing demand is one of society's foremost challenges for the next half-century. The challenge in converting sunlight to electricity via photovoltaic solar cells is dramatically reducing $/watt of delivered solar electricity. In this context the sun trackers are such devices for efficiency improvement. The diurnal and seasonal movement of earth affects the radiation intensity on the solar systems. Sun-trackers move the solar systems to compensate fo...
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#1Kok-Keong Chong (UTAR: Universiti Tunku Abdul Rahman)H-Index: 19
#2Chee-Woon Wong (UTAR: Universiti Tunku Abdul Rahman)H-Index: 9
Azimuth-elevation and tilt-roll tracking mechanism are among the most commonly used sun-tracking methods for aiming the solar collector towards the sun at all times. It has been many decades that each of these two sun-tracking methods has its own specific sun-tracking formula and they are not interrelated. In this paper, the most general form of sun-tracking formula that embraces all the possible on-axis tracking methods is presented. The general sun-tracking formula not only can provide a gener...
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#1Shuichi Ino (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 10
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Rehabilitation systems and assistive technology devices for people with motor disabilities caused by stroke or the aging process require a human-friendly actuator that is soft, compact, slow, noiseless, and environmentally benign. In order to realize these kinds of kinetic rehabilitation systems, we design a soft metal hydride (MH) actuator using a laminate bellows. For the purpose of this study, we develop the soft and light bellows made of a multilayer laminate film. As a result of experimenta...
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#1George M. Lloyd (UNR: University of Nevada, Reno)H-Index: 12
#2Kwang J. Kim (UNR: University of Nevada, Reno)H-Index: 46
Abstract Metal hydrides have been investigated for use in a number of applications, such as heat regenerators, thermal compressors, and hydrogen storage. McKibben actuators are pneumatic actuators that have unique characteristics, such as biomimeticity (having force/linear displacement characteristics similar to muscles), compactness, high force-to-mass ratios, and moreover are lubricationless, noiseless, soft actuating, and environmentally benign. Actuators with these characteristics are ideal ...
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#1Boon-Han Lim (UTAR: Universiti Tunku Abdul Rahman)H-Index: 9
#2Chern-Sing LimH-Index: 1
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Abstract A dual-axis tracked Photovoltaic (PV) system can produce up to 30% more electrical energy in a year as compared to a fixed-tilt PV system. To be economically feasible, a sun-tracker must also be accountable for the cost effectiveness, durability and long-term reliability despite the gain in electrical yield. To achieve this purpose, in this paper, we are reporting a practical industrial design of a large-scale dual-axis sun-tracker consisting of a vertical-axis-rotating-platform and mul...
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#1Mi Yeon Shin (CBNU: Chonbuk National University)
Last. Chang-Ho Yu (CBNU: Chonbuk National University)H-Index: 6
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BACKGROUND: Hydrogen storage using metal hydride (MH) offers various advantages so the global research and development using MH alloys keeps growing. OBJECTIVE: In this paper, we developed a new actuation system using temperature control of the MH module. METHODS: The actuation system consisted of an MH module, fan, mass flow controller (MFC), solenoid valve, actuator, and a temperature and pressure sensor. The MH module, two fans and temperature sensors were set for heating and cooling the MH p...
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#2P. V Ramana (Sardar Vallabhbhai Patel Institute of Technology)
The effectiveness of each solar-operated system mostly depends upon its orientation with respect to sunbeams, and for this, there do plethora of system exist, but as per the ecological and geometrical circumstances, the efficiency of conventional systems varies, and for the reason that, the overall yield is deteriorated. It has known that an external energy source is essential for driving the solar tracking unit. Somehow, if one could minimize or dispense with this external energy source, the ef...
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