Journal of Solar Energy Engineering: Recent submissions
Now showing items 821-840 of 3077
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Description and Computer Modeling of a Ball and Socket Hub That Enables Teetering for Three Bladed Wind Turbines
(The American Society of Mechanical Engineers (ASME), 2015)A horizontal axis wind turbine with a ballandsocket hub is disclosed. The hub enables horizontal axis turbines with two or more blades to teeter in response to wind shear gradients. Computer modeling was done using existing ... -
Development of a Solar Receiver Based on Compact Heat Exchanger Technology for Supercritical Carbon Dioxide Power Cycles
(The American Society of Mechanical Engineers (ASME), 2015)Supercritical carbon dioxide (sCO2) can be used both as a heat transfer and working fluid in solar power tower plants. The main concern in the design of a direct sCO2 receiver is the high operating pressures, i.e., close ... -
Conceptual Design and Performance Analysis of a Solar Thermal Photovoltaic Powered Absorption Refrigeration System
(The American Society of Mechanical Engineers (ASME), 2015)A conceptual design of the power system for a water–lithium bromide absorption system is presented in this work for a given cooling load. The proposed system utilizes both solar thermal and the photovoltaic (PV) generated ... -
Probabilistic Analysis to Quantify Optical Performance and Error Budgets for Next Generation Heliostats
(The American Society of Mechanical Engineers (ASME), 2015)Current heliostats cost ∼$200/m2 of reflective area and are estimated to contribute up to 50% of the total solar power tower plant costs. A drastic overall cost reduction is required in order for concentrated solar thermal ... -
Behavior of a Solar Collector Loop During Stagnation
(The American Society of Mechanical Engineers (ASME), 2015)A mathematical model simulating the emptying behavior of a pressurized solar collector loop with solar collectors with a good emptying behavior is developed and validated with measured data. The calculated results are in ... -
Comparative Analysis of Single and Dual Media Thermocline Tanks for Thermal Energy Storage in Concentrating Solar Power Plants
(The American Society of Mechanical Engineers (ASME), 2015)A moltensalt thermocline tank is a lowcost option for thermal energy storage (TES) in concentrating solar power (CSP) plants. Typical dualmedia thermocline (DMT) tanks contain molten salt and a filler material that provides ... -
A Novel Model for Daily Energy Production Estimation of Grid Connected Photovoltaic System
(The American Society of Mechanical Engineers (ASME), 2015)The rapidly growing markets for distributed and centralized gridconnected photovoltaic (PV) systems require the reliable and available information for reflecting and predicting the electricity generation of PV systems. In ... -
Photovoltaics Energy Prediction Under Complex Conditions for a Predictive Energy Management System
(The American Society of Mechanical Engineers (ASME), 2015)Solar energy converted and fed to the utility grid by photovoltaic modules has increased significantly over the last few years. This trend is expected to continue. Photovoltaics (PV) energy forecasts are thus becoming more ... -
CuO Nanoparticles Based Bulk Heterojunction Solar Cells: Investigations on Morphology and Performance
(The American Society of Mechanical Engineers (ASME), 2015)Copper oxide (CuO) is a ptype semiconductor having a band gap energy of 1.5 eV, which is close to the ideal energy gap of 1.4 eV required for solar cells to allow good solar spectral absorption. The inherent electrical ... -
Stress and Fracture Analyses of Solar Silicon Wafers During Suction Process and Handling
(The American Society of Mechanical Engineers (ASME), 2015)Solar wafer/cell breakage depends on the combination of the stresses generated in the handling and the presence of structural defects such as cracks. Suction process is a common loading during silicon wafer handling. This ... -
Design of a Solar Reactor to Split CO2 Via Isothermal Redox Cycling of Ceria
(The American Society of Mechanical Engineers (ASME), 2015)The design procedure for a 3 kWth prototype solar thermochemical reactor to implement isothermal redox cycling of ceria for CO2 splitting is presented. The reactor uses beds of mmsized porous ceria particles contained in ... -
Sun Relative Pointing for Dual Axis Solar Trackers Employing Azimuth and Elevation Rotations
(The American Society of Mechanical Engineers (ASME), 2015)We present an algorithm to calculate the azimuth and elevation angles for a dual axis tracker to be pointed away from the sun with a desired orientation between the sun and the tracker face. Desired tracker positions are ... -
Improvement in Solar Chimney Power Generation by Using a Diffuser Tower
(The American Society of Mechanical Engineers (ASME), 2015)The solar chimney prototype, operated in Spain from 1982 to 1989, verified the concept of the solar chimney. The power generation mechanism in this system is to turn the wind turbine placed inside a high rise cylindrical ... -
Twenty Four Hour Solar Irradiance Forecast Based on Neural Networks and Numerical Weather Prediction
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, several models to forecast the hourly solar irradiance with a day in advance using artificial neural network techniques have been developed and analyzed. The forecast irradiance is the one incident on the ... -
Modular Design and Experimental Testing of a 50 kWth Pressurized Air Solar Receiver for Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2015)A hightemperature highconcentration pressurizedair solar receiver is considered for driving a power generation Brayton cycle. The modular design consists of a cylindrical SiC cavity surrounded by a concentric annular ... -
Numerical Simulation of Natural Convection in Solar Cavity Receivers
(The American Society of Mechanical Engineers (ASME), 2015)Cavity receivers used in solar power towers and dish concentrators may lose considerable energy by natural convection, which reduces the overall system efficiency. A validated numerical receiver model is desired to better ... -
Design Considerations of Photovoltaic/Thermal Air Systems: Energetic and Exergetic Approaches
(The American Society of Mechanical Engineers (ASME), 2015)Photovoltaic/thermal (PV/T) is an integrated panel simultaneously producing combined heat and electricity. In order to examine the effect of the dimensional, operational, and environmental parameters, energetic and exergetic ... -
Parametric Consideration of a Thermal Water Pump and Application for Agriculture
(The American Society of Mechanical Engineers (ASME), 2015)This research studied the effects of suction heads on the efficiency of a thermal water pump with steam. In order to save energy, the authors also studied the appropriate amount of air added to a steam working fluid. Cooling ... -
Geographical Limitations on Integral Collector Storage Collectors Due to Freezing
(The American Society of Mechanical Engineers (ASME), 2015)Passive integral collector storage (ICS) solar water heaters can potentially heat water at lower costs then active systems with freeze protection. However, ICS panels can freeze in cold weather. This study developed a model ... -
A Circuit Based Approach to Simulate the Characteristics of a Silicon Photovoltaic Module With Aging
(The American Society of Mechanical Engineers (ASME), 2015)The aging of photovoltaic modules results inevitably in a decrease of their efficiency all through their lifetime utilization. An approach to simulate the evolution of electrical characteristics of a photovoltaic module ...