Jülich Solar Power Tower—Experimental Evaluation of the Storage Subsystem and Performance Calculation

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Stefan Zunft ◽  
Matthias Hänel ◽  
Michael Krüger ◽  
Volker Dreißigacker ◽  
Felix Göhring ◽  
...  
Keyword(s):  
Solar Power ◽  
Measurement Data ◽  
Test Results ◽  
High Discharge ◽  
Central Receiver ◽  
Solid Media ◽  
Storage Behavior ◽  
And Performance ◽  
Solar Power Tower ◽  
Set Up

Storage technology based on solid media heated in direct contact—so-called regenerators—is well suited to promote the market introduction of solar central receiver plants with air receivers. However, starting from existing technologies, several design issues need to be addressed. A test campaign was performed at the Solar Power Tower Jülich, an experimental central receiver plant, to experimentally verify the functionality and to quantify the performance of the plant’s storage subsystem. To this end, a gas burner used during commissioning of the plant, was reactivated and used to run a series of operation sequences. Computer simulations have been set up and applied to retrace the storage behavior to confirm the validity of the underlying models and to gain further insight into the relevant phenomena. The test results confirm the full functionality of the storage subsystem, the ability to perform cycling at high discharge heat rates and relatively low heat losses, supporting the view that the technology represents a promising basis for up-scaled implementations. Measurement data and simulation results are in good agreement, confirming the maturity of existing design tools.

scholarly journals Solar Thermal Power: Appraisal of Solar Power Towers

2018 ◽  
Vol 225 ◽  
pp. 04003
Author(s):  
Hashem Shatnawi ◽  
Chin Wai Lim ◽  
Firas Basim Ismail
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Solar Power ◽  
Thermal Power ◽  
Tube Material ◽  
Power Cycles ◽  
Solar Thermal Power ◽  
Central Receiver ◽  
Receiver System ◽  
Solar Power Tower

This study delves into several engineering procedures related to solar power tower plants. These installations come with central receiver system technologies and high-temperature power cycles. Besides a summary emphasizing on the fundamental components of a solar power tower, this paper also forwards a description of three receiver designs. Namely, these are the tubular receiver, the volumetric receiver and the direct absorber receiver. A variety of heat transfer mediums were assessed, while a comprehensive explanation was provided on the elements of external solar cylindrical receivers. This explanation covers tube material, molten salt, tube diameter and heat flux.

Multi-aiming strategy design for quadruple prism shaped central receiver in solar power tower system

2017 ◽  
Vol 4 (2) ◽  
pp. 223-230
Author(s):  
Wenjun Huang ◽  
Yingmei Qi ◽  
Fuxing Yi ◽  
Dewen Li ◽  
Hao Wang
Keyword(s):  
Solar Power ◽  
Central Receiver ◽  
Solar Power Tower ◽  
Strategy Design ◽  
Tower System

Design and performance analysis of a multi-reflection heliostat field in solar power tower system

2020 ◽  
Vol 160 ◽  
pp. 498-512
Author(s):  
Yeguang Hu ◽  
Zhigang Xu ◽  
Chaoying Zhou ◽  
Jianjun Du ◽  
Yingxue Yao
Keyword(s):  
Performance Analysis ◽  
Solar Power ◽  
And Performance ◽  
Solar Power Tower ◽  
Tower System

The Design and Testing of a Molten Salt Steam Generator for Solar Application

1988 ◽  
Vol 110 (1) ◽  
pp. 38-44 ◽  
Author(s):  
W. A. Allman ◽  
D. C. Smith ◽  
C. R. Kakarala
Keyword(s):  
Molten Salt ◽  
Steam Generator ◽  
Test Facility ◽  
Process Conditions ◽  
Test Results ◽  
Overall Design ◽  
Central Receiver ◽  
And Performance ◽  
Design And Testing ◽  
Solar Application

This paper describes the design and testing of the Steam Generator Subsystem (SGS) for the Molten Salt Electric Experiment at Sandia Laboratories in Albuquerque, New Mexico. The Molten Salt Electric Experiment (MSEE) has been established at the Department of Energy’s five megawatt thermal Solar Central Receiver Test Facility, to demonstrate the feasibility of the molten salt central receiver concept. The experiment is capable of generating 0.75 megawatts of electric power from solar energy, with the capability of storing seven megawatt-hours of thermal energy. The steam generator subsystem transfers sensible heat from the solar-heated molten nitrate salt to produce steam to drive a conventional turbine. This paper discusses the design requirements dictated by the steam generator application and also reviews the process conditions. Details of each of the SGS components are given, featuring the aspects of the design and performance unique to the solar application. The paper concludes with a summary of the test results confirming the overall design of the subsystem.

465Q Gasoline Engine Turbocharger Matching and Performance Calculation

2012 ◽  
Vol 500 ◽  
pp. 223-229 ◽  
Author(s):  
Peng Qi Zhang ◽  
Dong Hui Zhao ◽  
Peng Wu ◽  
Yin Yan Wang
Keyword(s):  
Simulation Model ◽  
Fuel Consumption ◽  
Test Bench ◽  
Gasoline Engine ◽  
Test Results ◽  
Simulation Error ◽  
And Performance ◽  
Set Up ◽  
Performance Calculation ◽  
Supercharged Engine

This article take the Dongan 465Q non-supercharged engine as the research object, the simulation model is built by GT-POWER and the corresponding test bench is set up. The simulation error is less than 3%, which indicates that the parameters of this model is correct, and can be used for further study of the gasoline engine. The supercharger, Garrett GT12, is selected by the matching calculation. The non-supercharged 465Q engine is modified as a turbocharged engine. The test results show that the power and the fuel consumption of the turbocharged engine is improved obviously, whose power is increased by 48% and fuel consumption is reduced by 4%.

scholarly journals Experimental Investigation of an Automotive Magnetorheological Shock Absorber

2017 ◽  
Vol 11 (4) ◽  
pp. 253-259
Author(s):  
Łukasz Jastrzębski ◽  
Bogdan Sapiński
Keyword(s):  
Shock Absorber ◽  
Measurement Data ◽  
Test Results ◽  
Experimental Examination ◽  
Piston Velocity ◽  
Testing Program ◽  
Technical Data ◽  
Piston Displacement ◽  
Operating Current ◽  
Set Up

AbstractThe study summarises the experimental examination of an automotive magnetorheological (MR) shock absorber under electrical and mechanical excitations, investigates its current and force responses and the energy dissipation in the system. The aim of experiments was to acquire measurement data that allows in next step of the research program to engineer an energy harvesting device for the absorber. The work covers basic technical data of the absorber, description of the experimental set-up, scenario of testing program and test results of the device. Of particular importance is the influence the operating current, piston displacement amplitude and piston velocity have on the absorber’s response.

scholarly journals Development of Steelmaking Slag Based Solid Media Heat Storage for Solar Power Tower Using Air as Heat Transfer Fluid: The Results of the Project REslag

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6092
Author(s):  
Michael Krüger ◽  
Jürgen Haunstetter ◽  
Joachim Hahn ◽  
Philipp Knödler ◽  
Stefan Zunft
Keyword(s):  
Heat Transfer ◽  
Solar Power ◽  
Axial Flow ◽  
Cost Effective ◽  
Heat Transfer Fluid ◽  
Steelmaking Slag ◽  
Solid Media ◽  
Partial Load ◽  
Solar Power Tower ◽  
Eu Project

Solar power towers with thermal energy storage based on direct-flow regenerators have the potential to generate cost-effective base-load electricity. An inventory option that opens up further cost-saving potential but has not yet been extensively investigated for this application is slag from electric arc furnace. This use has not only economic advantages, but also serves environmental protection, since a large proportion of this type of slag is currently not used any further, but is disposed of in landfills. In the completed EU project REslag, various subsequent uses of the slag were investigated, including the possibility presented here of using sintered slag pebbles as an inventory for regenerators in solar power towers with air as the heat transfer fluid. The main results from the different phases of the project are presented, with a focus on the investigations not yet published. In addition to results from thermal simulations on different designs and on the partial load and off-design behavior of the storage lead concept “Axial flow—standing”, these are mainly results from fluid mechanical calculations on the distributor design of the storage and from material investigations on the slag. In summary, it can be stated that the sintered slag pebbles are thermally, mechanically and chemically competitive with conventional inventory materials and the principle feasibility of a slag-based storage was confirmed by the results of these investigations. The defined storage lead concept was elaborated in detail and the performance of the design was confirmed by simulations and experiments.

scholarly journals A Comprehensive Analysis of Partial Shading Effect on Output Parameters of a Grid-connected PV System

2018 ◽  
Vol 8 (2) ◽  
pp. 749
Author(s):  
H. Rahimi Mirazizi ◽  
M. A. Shafiyi
Keyword(s):  
Harmonic Distortion ◽  
Comprehensive Analysis ◽  
Test Results ◽  
Pv System ◽  
Partial Shading ◽  
Pv Panel ◽  
System Output ◽  
Multi Level ◽  
And Performance ◽  
Set Up

One of the issues of grid-connected photovoltaic systems is the effect of the partial shading on the key parameters and performance of the system. In practice, a share of the entire PV panel may shadded because of the various reasons, inevitably. In this case, the key parameters of the system output are affected with respect to the shading extent and paradigm. In this paper, the effects of the various partial shading patterns on the ouput of the system are examined. This is performed by deriving relevant equations and appropriate modeling of the system and defining different scenarios. The analysis on the system performance is carried out on the dominant output parameters including panel voltage, panel power, and total harmonic distortion (THD) of the inverter. Also, the study considers the effect of using bypass diodes in the panels or not. Addintionally, to compare derived conclusions, the study is implementd on a practical system. The set up is made up of a 7-level multi-level inverter, a Z-source converter, and 1 kW lateral circuitry. The real world test results of the study demonstrate a negligible deviation compared to the simulation results.

Simulation of Utility-Scale Central Receiver System Power Plants

2009 ◽  
Author(s):  
Michael J. Wagner ◽  
Sanford A. Klein ◽  
Douglas T. Reindl
Keyword(s):  
Power Plants ◽  
Solar Power ◽  
Unit Cost ◽  
Concentrating Solar Power ◽  
Central Receiver ◽  
Receiver System ◽  
Parabolic Dish ◽  
Tool Set ◽  
Solar Power Tower ◽  
Economic Analyses

The operation of solar energy systems is necessarily transient. Over the lifetime of a concentrating solar power plant, the system operates at design conditions only occasionally, with the bulk of operation occurring under part-load conditions depending on solar resource availability. Credible economic analyses of solar-electric systems requires versatile models capable of predicting system performance at both design and off-design conditions. This paper introduces new and adapted simulation tools for power tower systems including models for the heliostat field, central receiver, and the power cycle. The design process for solar power tower systems differs from that for other concentrating solar power (CSP) technologies such as the parabolic trough or parabolic dish systems that are nearly modular in their design. The design of an optimum power tower system requires a determination of the heliostat field layout and receiver geometry that results in the greatest long-term energy collection per unit cost. Research presented in this paper makes use of the DELSOL3 code (Kistler, 1986) which provides this capability. An interface program called PTGEN was developed to simplify the combined use of DELSOL3 and TRNSYS. The final product integrates the optimization tool with the detailed component models to provide a comprehensive modeling tool set for the power tower technology.

scholarly journals Short-Term Forecasts of DNI from an Integrated Forecasting System (ECMWF) for Optimized Operational Strategies of a Central Receiver System

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1368 ◽  
Author(s):  
Lopes ◽  
Conceição ◽  
Silva ◽  
Fasquelle ◽  
Salgado ◽  
...  
Keyword(s):  
Solar Power ◽  
Weather Prediction ◽  
Electric Energy ◽  
Numerical Weather Prediction Model ◽  
Short Term ◽  
Operational Strategies ◽  
Central Receiver ◽  
Receiver System ◽  
Forecasting System ◽  
Solar Power Tower

Short-term forecasts of direct normal irradiance (DNI) from the Integrated Forecasting System (IFS) and the global numerical weather prediction model of the European Centre for Medium-Range Weather Forecasts (ECMWF) were used in the simulation of a solar power tower, through the System Advisor Model (SAM). Recent results demonstrated that DNI forecasts have been enhanced, having the potential to be a suitable tool for plant operators that allows achieving higher energy efficiency in the management of concentrating solar power (CSP) plants, particularly during periods of direct solar radiation intermittency. The main objective of this work was to assert the predictive value of the IFS forecasts, regarding operation outputs from a simulated central receiver system. Considering a 365-day period, the present results showed an hourly correlation of ≈0.78 between the electric energy injected into the grid based on forecasted and measured data, while a higher correlation was found for the daily values (≈0.89). Operational strategies based on the forecasted results were proposed for plant operators regarding the three different weather scenarios. Although there were still deviations due to the cloud and aerosol representation, the IFS forecasts showed a high potential to be used for supporting informed energy dispatch decisions in the operation of central receiver units.

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