Incorporating Thermal Storage Into a SEGS Plant Using TRNSYS: A Status Report

Solar Energy ◽  
2004 ◽  
Author(s):  
Jade D. Braithwaite ◽  
Robert Boehm
Keyword(s):  
Power Generation ◽  
Storage Tank ◽  
Plug Flow ◽  
Transient Simulation ◽  
Status Report ◽  
Tank Model ◽  
Component Type ◽  
Different Types ◽  
Fluid Properties ◽  
Generating System

Two new preliminary component types were developed for the transient simulation program TRNSYS with IISiBat that models three different types of sensible thermal storages for analysis with use in a solar electric generating system (SEGS) simulation. One component containing a fully mixed, a stratified and a plug flow tank model options has been developed such that the input and parameter specifications are similar so that all three models could be easily placed into one component type. A single, cylindrical direct storage tank with one inlet and one outlet that evaluates fluid properties as a function of temperature is representative for all three models. The second component is a storage controller that passes along pertinent charging, dwell or discharging information to the storage and integrates the storage into a given SEGS model. Results were generated for each storage tank integrated into a SEGS VI simulation model for temperature distribution and power generation.

Status Report—Advanced Heat Exchanger Technology for a CCGT Power Generation System

1983 ◽  
Vol 105 (2) ◽  
pp. 348-353 ◽  
Author(s):  
D. E. Wright ◽  
L. L. Tignac
Keyword(s):  
Power Generation ◽  
Heat Exchanger ◽  
Fluidized Bed ◽  
Ceramic Materials ◽  
Department Of Energy ◽  
Test Facility ◽  
Status Report ◽  
Test Results ◽  
Generation System ◽  
Power Generation System

Rocketdyne is under contract to the Department of Energy for the development of heat exchanger technology that will allow coal to be burned for power generation and cogeneration applications. This effort involves both atmospheric fluidized bed and pulverized coal combustion systems. In addition, the heat exchanger designs cover both metallic and ceramic materials for high-temperature operations. This paper reports on the laboratory and small AFB test results completed to date. It also covers the design and installation of a 6×6 ft atmospheric fluidized bed test facility being used to correlate and expand the knowledge gained from the initial tests. The paper concludes by showing the direction this technology is taking and outlining the steps to follow in subsequent programs.

Analysis and Operation Optimization of Recompression Supercritical Carbon Dioxide Power Generation System Based on the Power Flow Method

2018 ◽  
Author(s):  
Xia Li ◽  
Qun Chen ◽  
Xi Chen
Keyword(s):  
Heat Transfer ◽  
Carbon Dioxide ◽  
Power Generation ◽  
Mass Flow ◽  
Power Flow ◽  
Heat Transfer Process ◽  
Working Fluid ◽  
Generation System ◽  
Fluid Properties ◽  
Power Generation System

Due to the peculiar physical properties, supercritical carbon dioxide (sCO2) is considered as a promising working fluid in power generation cycles with high reliability, simple structure and great efficiency. Compared with the general thermal systems, the variable properties of sCO2 make the system models obtained by the traditional modelling method more complex. Besides, the pressure distribution in the system will affect the distribution of the fluid properties, the fluid properties influencing the heat transfer process will produce an impact on the temperature distribution which will in turn affect the pressure distribution through the mass flow characteristics of all components. This contribution introduces the entransy-based power flow method to analyze and optimize a recompression sCO2 power generation system under specific boundary conditions. About the heat exchanger, by subdividing the heat transfer area into several segment, the fluid properties in each segment are considered constant. Combining the entransy dissipation thermal resistance of each segment and the energy conservation of each fluid in each segment offers the governing equations for the whole heat transfer process without any intermediate segment temperatures, based on which the power flow diagram of the overall heat transfer process is constructed. Meanwhile, the pressure drops are constrained by the mass flow characteristics of each component, and the inlet and outlet temperatures of compressors and turbines are constrained by the isentropic process constraints and the isentropic efficiencies. Combining the governing equations for the heat exchangers and the constraints for turbine and the compressors, the whole system is modeled by sequential modular method. Based on this newly developed model, applying the genetic algorithm offers the maximum thermal efficiency of the system and the corresponding optimal operating variables, such as the mass flow rate of the working fluid in the cycle, the heat capacity rate of the cold source and the recompression mass fraction under the given heat source. Furthermore, the optimization of the system under different boundary conditions is conducted to study its influence on the optimal mass flow rate of the working fluid, the heat capacity of the cold source and the maximum system thermal efficiency. The results proposes some useful design suggestions to get better performance of the recompression supercritical carbon dioxide power generation system.

Study on Damage Performance of Oil Storage Tank in the Basis of Modal Test and FEA

2010 ◽  
Vol 163-167 ◽  
pp. 2507-2510
Author(s):  
Guo Feng Du ◽  
Cheng Xiang Xu ◽  
Shan Po Jia
Keyword(s):  
Storage Tank ◽  
Damage Identification ◽  
Single Point ◽  
Physical Parameters ◽  
Modal Parameter ◽  
Tank Model ◽  
Modal Test ◽  
Oil Storage ◽  
Oil Storage Tank ◽  
Foundation Parameters

In order to learn about the dynamic characteristics of the oil storage tank, detect and identify the damaged oil storage tank, based on the basic principle of the experimental modal analysis, the modal test was maken on the vertical dome roof steel oil storage tank model with the hammer method of multi-point input and output on single point, and the identification ability of the modal parameter was studied when the oil storage tank model is damaged. At the same time, we carried out the model's simulation calculation with FEA, considering the effects of the structural physical parameters and the foundation parameters of the oil storage tank. The calculated results of modal test are in accordance with test values, the analysis results provides certain basis for the damage identification and health monitoring work of the oil storage tank structure.

The Principle of Ultrasonic Cross-Correlation Flowmetering

1975 ◽  
Vol 8 (2) ◽  
pp. 65-70 ◽  
Author(s):  
J. Coulthard
Keyword(s):  
Cross Correlation ◽  
Operating Characteristics ◽  
Different Types ◽  
Flow Systems ◽  
Fluid Properties

This paper describes the principles and general operating characteristics of ultrasonic cross-correlation flowmeters for liquids and gases. A great deal of research is currently proceeding to determine the performance of these instruments when measuring different types of fluids, but the general form of results are given for various flow systems. Since there is no restriction to flow and the measurement is largely independent of the fluid properties there is a great deal of interest in applying the technique in industry when suitable ‘peak-seeking’ correlators become available.

Transient Analysis of a Multi-phase Induction Machine Operating as Generator

2016 ◽  
Vol 2 (1) ◽  
pp. 79
Author(s):  
Alok Kumar Mohanty ◽  
K B Yadav
Keyword(s):  
Power Generation ◽  
Performance Analysis ◽  
Experimental Analysis ◽  
Transient Analysis ◽  
Induction Machine ◽  
Experimental Results ◽  
Three Phase ◽  
Different Types ◽  
Generating Mode ◽  
Multi Phase

<em>Multi-phase machines are considered serious contenders as compared to the three phase machines for variable applications in generating mode. </em><em>This paper presents the transient performance analysis of a multi-phase induction machine operating in six-phase mode for power generation. In this paper the simulation and experimental analysis of a six-phase machine in generating mode have been made. The simulations are made and the machine functionality was investigated during no-load and when subjected to different types of loads. Experimental results are provided to confirm the ability of these models to represent during no load as well as during load period and the result were found to be satisfactory for power generation</em>.

scholarly journals Status Report on Sample Preparation Protocols Developed at the LMC14 Laboratory, Saclay, France: From Sample Collection to 14C AMS Measurement

Radiocarbon ◽  
2017 ◽  
Vol 59 (3) ◽  
pp. 713-726 ◽  
Author(s):  
J-P Dumoulin ◽  
C Comby-Zerbino ◽  
E Delqué-Količ ◽  
C Moreau ◽  
I Caffy ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Storage Time ◽  
Status Report ◽  
Sample Collection ◽  
Laboratory Sample ◽  
Different Types ◽  
Chemical Pretreatments ◽  
Sampling Procedures

AbstractThe main objective of this report is to present the dating process routinely applied to different types of samples at the Laboratoire de Mesure du Carbone 14 (LMC14). All the results and protocols refer to our procedures over the last 5 years. A description of the sorting and chemical pretreatments of the samples as well as the extraction and graphitization of CO2 are reported. Our last study concerning the degradation of the blank level according to the storage time of the targets between graphitization and accelerator mass spectrometry (AMS) measurement is also presented. This article also provides information on how to submit a valid laboratory sample. We give details relating to sampling procedures on site as well as contamination issues relative to the 14C dating methodology.

Research on General Interface Model Suitable for Electromechanical Transient Simulation

2014 ◽  
Vol 551 ◽  
pp. 326-330
Author(s):  
Xiao Yan Sun ◽  
Yong Qiang Zhu
Keyword(s):  
Power Generation ◽  
Transient Simulation ◽  
Interface Model ◽  
Generation System ◽  
Modeling And Control ◽  
New Energy ◽  
Power Generation System ◽  
And Control ◽  
General Interface ◽  
Made In

New energy power generation system needs interface converter to connect to the grid. Because the type of new energy is different, its interface converter is also different. In order to adapt to the diversification of the modeling and control strategy of the converter, a generalized interface model is established in this paper. The model is based on the electromechanical transient simulation, which ignores the physics switching device and simplifies the control module. Finally, adaptive verifications are made in PSCAD/EMTDC and Matlab/Simulink for photovoltaic power generation system and wind power generation system. The results of simulation prove the validity of the generalized model.

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