scholarly journals Comparative analysis of SOFC-MGT top-level and new bottom-level system performance

2021 ◽  
Vol 271 ◽  
pp. 04013
Author(s):  
Qiao Run-Peng ◽  
He Jun-Neng ◽  
Liang Qian-Chao ◽  
Yang Fan ◽  
Fu Da-Wang
Keyword(s):  
System Performance ◽  
Circulatory System ◽  
Simulation Models ◽  
Simulation Software ◽  
Circulation System ◽  
Level System ◽  
Bottom Level ◽  
Output Performance ◽  
Simulink Simulation ◽  
Two Systems

In order to make the SOFC-MGT system more widely used, the mathematical simulation models of the SOFC-MGT top-level circulatory system and the new bottom circulatory system were first established, and then the performance of the two systems was analyzed and compared using Matlab/Simulink simulation software. The research results show that the output performance of the SOFC-MGT top-level circulation system is due to the new bottom-level circulation system, and the stack output performance of the two systems is not much different.

A comparison of two techniques for growing minimally water-stressed plants

1982 ◽  
Vol 60 (3) ◽  
pp. 219-223 ◽  
Author(s):  
Kerry T. Hubick ◽  
David R. Drakeford ◽  
David M. Reid
Keyword(s):  
Nutrient Solution ◽  
Water Availability ◽  
Nutrient Medium ◽  
Growth Characteristics ◽  
Stress Physiology ◽  
Easy Access ◽  
Circulation System ◽  
Support Medium ◽  
Two Systems

Two watering systems used for growing minimally stressed plants are described. An aeroponics system, which relies on a mist of nutrient solution applied to roots without a root support medium, affords control over water availability and easy access to roots. A continuous circulation system, which constantly circulates nutrient medium, also provides control over water availability as well as control over pO2 and stress duration in flooded plants. A comparison is made of the growth characteristics of plants grown in the two systems with those grown by traditional watering methods. The significance of watering prehistory to stress physiology experiments is discussed.

Understanding the Importance of Capturing Climate and Occupancy Trends During Concept-Stage Sustainable Building Design

2018 ◽  
Author(s):  
Sean Lin ◽  
Bahaa Albarhami ◽  
Salvador Mayoral ◽  
Joseph Piacenza
Keyword(s):  
Energy Consumption ◽  
Simulation Models ◽  
Building Design ◽  
Building Energy ◽  
Simulation Software ◽  
Phase Iii ◽  
Data Set ◽  
Climate Zones ◽  
Leed Certification ◽  
Actual Energy Consumption

This paper presents a comparison of concept stage computational model predictions to capture how building energy consumption is affected by different climate zones. The California State University, Fullerton (CSUF) Student Housing Phase III, which received a Platinum Leadership in Energy and Environmental Design (LEED) certification for the Building Design and Construction category, and its performance in a LEED California Nonresidential Title 24 (NRT24) and ASHRAE 90.1 climate zones is used as a case study to illustrate the method. Through LEED approved simulation software, the standard compliant energy simulation models are compared to the occupancy scheduled models along with the actual energy consumption in different climate zones. The results provide insight to how variables within student dormitory life affect total building energy usage. Total amount of energy consumed per area is one new factor providing understanding into occupancy trends. This new data set reveals more understanding regarding how and where the energy is consumed to maintain a comfortable learning environment.

scholarly journals The Development Of Modules Based On Problem Solving with Mind Map About Blood Circulation System Material for Students Class VIII Junior High School

2019 ◽  
Vol 3 (1) ◽  
pp. 1-8
Author(s):  
Salmi Halen ◽  
Lufri Lufri ◽  
Dwi Hilda Putri
Keyword(s):  
Problem Solving ◽  
Small Group ◽  
Junior High School ◽  
Circulatory System ◽  
Development Stage ◽  
Circulation System ◽  
Practice Test ◽  
Blood Circulation System ◽  
Class Viii ◽  
The Right

The implementation of the 2013 Curriculum is to create a creative and innovative person. One of the right approaches is Problem Solving. Circulatory system material is the material that suits the problem solving approach. Less varied teaching materials will make the learning process becomes monotonous so that learners are not interested to learn. Therefore, a research aimed to produce problem-based solving module with mind map of circulatory system material for students of class VIII SMP.This research is a development research using development procedure from Plomp with three stages: initial investigation stage, development stage or prototype, and assessment phase. The object of this research is problem solving module minded mind map, and the subject of research is teachers and learners SMPN 15 Padang.Validity results obtained an average of 86.46% with valid criteria. The results of small group practice test (small group) obtained an average of 100% very practical category. Modular practicality test obtained an average result of 83.33% with practical category, while learners of 79.32% with practical category. It can be concluded that problem solving module with mind map about circulation system material for students of class VIII SMP has been valid and practical.

scholarly journals A numerical simulation of realistic top coal caving intervals under different top coal thicknesses in longwall top coal caving working face

2021 ◽  
Author(s):  
Chuang Liu ◽  
Huamin Li
Keyword(s):  
Numerical Simulation ◽  
Coal Seam ◽  
Distinct Element ◽  
Simulation Models ◽  
Simulation Software ◽  
Thick Coal Seam ◽  
Coal Recovery ◽  
Working Face ◽  
Longwall Top Coal Caving ◽  
Selection Of

Abstract In the process of longwall top coal caving, the selection of the top coal caving interval along the advancing direction of the working face has an important effect on the top coal recovery. To explore a realistic top coal caving interval of the longwall top coal caving working face, longwall top coal caving panel 8202 in the Tongxin Coal Mine is used as an example, and 30 numerical simulation models are established by using Continuum-based Distinct Element Method (CDEM) simulation software to study the top coal recovery with 4.0 m, 8.0 m, 12.0 m, 16.0 m, 20.0 m and 24.0 m top coal thicknesses and 0.8 m, 1.0 m, 1.2 m, 1.6 m and 2.4 m top coal caving intervals. The results show that with an increase in the top coal caving interval, the single top coal caving amount increases. The top coal recovery is the highest with a 0.8 m top coal caving interval when the thickness of the top coal is less than 4.0 m, and it is the highest with a 1.2 m top coal caving interval when the coal seam thickness is greater than 4.0 m. These results provide a reference for the selection of a realistic top coal caving interval in thick coal seam caving mining.

The Optimal Control of Vehicle`s Steering and Braking System

2013 ◽  
Vol 473 ◽  
pp. 243-246
Author(s):  
Guo Li ◽  
Cheng Yao Jia ◽  
Wen Zheng Zhang
Keyword(s):  
Neural Network ◽  
Fuzzy Neural Network ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Braking System ◽  
Simulink Simulation ◽  
Neural Network Controller ◽  
Network Controller ◽  
Fuzzy Neural ◽  
The Membership Function

In order to make a research on the vehicle`s ABS and AFS system,the fuzzy neural network controller was designed on the basis of the electric vehicle`s steering and braking models. Then the genetic algorithms was used to improve the parameters of the membership function. Finally, the Matlab/Simulink simulation software has been used in the simulation analysis. The result of simulation proves that the designed system has good tracking performance and more stronger systemic robustness .

Dynamic performance investigations of a turbojet engine using a cross-application visual oriented platform

2008 ◽  
Vol 112 (1129) ◽  
pp. 161-169 ◽  
Author(s):  
K. G. Kyprianidis ◽  
A. I. Kalfas
Keyword(s):  
Gas Turbine ◽  
Initial Conditions ◽  
Dynamic Performance ◽  
Simulation Models ◽  
Simulation Software ◽  
Performance Models ◽  
Programming Environments ◽  
Performance Simulation ◽  
Spreadsheet Program ◽  
Turbojet Engine

Abstract This paper presents the development of visual oriented tools for the dynamic performance simulation of a turbojet engine using a cross-application approach. In particular, the study focuses on the feasibility of developing simulation models using different programming environments and linking them together using a popular spreadsheet program. As a result of this effort, a low fidelity cycle program has been created, capable of being integrated with other performance models. The amount of laboratory sessions required for student training during an educational procedure, for example for a course in gas turbine performance simulation, is greatly reduced due to the familiarity of most students with the spreadsheet software. The model results have been validated using commercially available gas turbine simulation software and experimental data from open literature. The most important finding of this study is the capability of the program to link to aircraft performance models and predict the transient working line of the engine for various initial conditions in order to dynamically simulate flight phases including take-off and landing.

Huge Forging Equipment Hydraulic System Dynamic Analysis

2012 ◽  
Vol 619 ◽  
pp. 459-462 ◽  
Author(s):  
Miao Xie ◽  
Jun Meng ◽  
Wen Xin Xu ◽  
Rong Bao Dong ◽  
Jian Liang Wang
Keyword(s):  
Hydraulic System ◽  
Simulation Models ◽  
Simulation Software ◽  
Hydraulic Systems ◽  
System Pressure ◽  
Hydraulic Hammer ◽  
Hammer Head ◽  
Working Principle ◽  
Switching Characteristics ◽  
Hammer Forging

In order to optimize the dynamic characteristic of hydraulic system of large forging equipment. It based on the model of one company of a certain aero-engine hydraulic system of hydraulic hammer forging, analysis the composition and working principle of hydraulic systems. Using simulation software AMESim, simulate the model of hydraulic systems and by changing the system pressure, flow and effect of the hammer-head stroke to explore this kind of switching characteristics of forging equipment’s hydraulic system. The result shows that this kind of simulation models can reflect the working status of hydraulic hammer well, and provide a technical reference for analysis and tuning equipment that with similar to forging equipment.

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