LaFeSi-based magnetocaloric material analysis: cyclic endurance and thermal performance results

2020 ◽  
Author(s):  
Sergiu Lionte ◽  
Alexander Barcza ◽  
Michel Risser ◽  
Christian Muller ◽  
Matthias Katter
Keyword(s):  
Thermal Performance ◽  
Cyclic Endurance ◽  
Material Analysis ◽  
Performance Results

scholarly journals Thermal Performance Visualization Using Object−Oriented Physical and Building Information Modeling

2020 ◽  
Vol 10 (17) ◽  
pp. 5888
Author(s):  
WoonSeong Jeong ◽  
Wei Yan ◽  
Chang Joon Lee
Keyword(s):  
Thermal Performance ◽  
Thermal Energy ◽  
Object Oriented ◽  
Building Design ◽  
Energy Performance ◽  
Information Modeling ◽  
Performance Simulation ◽  
Performance Visualization ◽  
Building Information ◽  
Performance Results

This study demonstrates the research and development of a visualization method called thermal performance simulation. The objective of this study is providing the results of thermal performance simulation results into building information modeling (BIM) models, displaying a series of thermal performance results, and enabling stakeholders to use the BIM tool as a common user interface in the early design stage. This method utilizes a combination of object-oriented physical modeling (OOPM) and BIM. To implement the suggested method, a specific BIM authoring tool called the application programming interface (API) was adopted, as well as an external database to maintain the thermal energy performance results from the OOPM tool. Based on this method, this study created a prototype called the thermal energy performance visualization (TEPV). The TEPV translates the information from the external database to the thermal energy performance indicator (TEPI) parameter in the BIM tool. In the TEPI, whenever BIM models are generated for building design, the thermal energy performance results are visualized by color-coding the building components in the BIM models. Visualization of thermal energy performance results enables non-engineers such as architects to explicitly inspect the simulation results. Moreover, the TEPV facilitates architects using BIM as an interface in building design to visualize building thermal energy performance, enhancing their design production at the early design stages.

Thermal Performance of a Thin Flat Plate Heat Pipe

2009 ◽  
Author(s):  
Wei Qu ◽  
Shijuan Li ◽  
Hongwu Yang
Keyword(s):  
Thermal Conductivity ◽  
Flat Plate ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Tilt Angle ◽  
Test Results ◽  
Test Setup ◽  
Plate Heat ◽  
Flat Plate Heat Pipe ◽  
Performance Results

A thin flat plate heat pipe (TFPHP) with a new structure of wick is fabricated and tested. The wick is formed by the narrow foils folded, the liquid passage and capillary force is provided by the folded clearance of the foils, the vapor passage is shaped by the periodic holes of the foils. One aluminum TFPHP of 260×60×4 mm3 size is made and the test setup is established. The test results show that the spreader has good performance as, at the horizontal state, the power transferred can reach 18.5W, the corresponding thermal conductivity is 838W/(m·°C). For different tilt angle, we have the performance results. The effects of parameters to the performance are discussed. The spreader is significant for the spreading of point power.

scholarly journals Simulation Methodology Based on Wind and Thermal Performance for Early Building Optimization Design in Taiwan

2021 ◽  
Vol 13 (18) ◽  
pp. 10033
Author(s):  
Chuan-Hsuan Lin ◽  
Min-Yang Chen ◽  
Yaw-Shyan Tsay
Keyword(s):  
Thermal Performance ◽  
Optimization Design ◽  
Evaluation Methods ◽  
Built Environments ◽  
Subtropical Climate ◽  
Simulation Methodology ◽  
Building Geometry ◽  
Early Decision ◽  
Performance Results

In a subtropical climate like that of Taiwan, the high temperature and humid environmental conditions often result in discomfort and health effects for building occupants. With regard to building geometry, the wind environment and thermal comfort assessment, which can enhance energy efficiency and the comfort and health of occupants, both ought to be considered as soon as possible in the design process. In view of the limited comprehensive design evaluation methods and design workflows regarding wind and thermal performance currently available, this research aims to develop an early decision support workflow that includes suggested performance evaluation methods and design optimization processes. The results of our case study show that the building had clear performance results using the proposed evaluation methods, making it easier for architects to understand and compare alternatives. Appropriate analysis and visualization of the results also effectively assisted architects in determining design solutions and making relevant decisions. The methods and results in this article can facilitate performance-based buildings for healthy and energy-efficient built environments.

scholarly journals Development of Photovoltaic Module with Fabricated and Evaluated Novel Backsheet-Based Biocomposite Materials

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3007 ◽  
Author(s):  
M. H. Alaaeddin ◽  
S. M. Sapuan ◽  
M. Y. M. Zuhri ◽  
E. S. Zainudin ◽  
Faris M. AL-Oqla
Keyword(s):  
Thermal Performance ◽  
Polyvinylidene Fluoride ◽  
Heat Dissipation ◽  
Accelerated Aging ◽  
Weather Conditions ◽  
Photovoltaic Module ◽  
Solar Module ◽  
Sugar Palm Fiber ◽  
Considerable Impact ◽  
Performance Results

Photovoltaic backsheets have considerable impact on the collective performance of solar cells. Material components should withstand certain temperatures and loads while maintaining high thermal stability under various weather conditions. Solar modules must demonstrate increased reliability, adequate performance, safety, and durability throughout the course of their lifetime. This work presents a novel solar module. The module consists of an innovative polyvinylidene fluoride-short sugar palm fiber (PVDF-SSPF) composite backsheet within its structure. It was electrically and thermally evaluated. The current-voltage characteristics (I-V) were obtained using the solar module analyzer, PROVA 210PV. A thermal evaluation was accomplished using a temperature device, SDL200. The thermal test consisted of two different assessments. The first targeted the surface and backsheet of the developed module to correlate their performance from within. The second assessment compared the thermal performance of the fabricated backsheet with the conventional one. Both tests were combined into a heatmap analysis to further understand the thermal performance. Results revealed that the developed module exhibited reasonable electrical efficiency, achieving appropriate and balanced I-V curves. PVDF-SSPF backsheets proved to be thermally stable by displaying less heat absorbance and better temperature shifts. Additional research efforts are highly encouraged to investigate other characteristics. To enhance performance, further analyses are needed such as the damp heat analysis, accelerated aging analysis, and heat dissipation phenomena.

scholarly journals Thermal Performance Evaluation of the Variation of Condenser Dimensions for Foodstuffs Transportation Cooling Systems

2021 ◽  
Vol 21 (3) ◽  
pp. 184-189
Author(s):  
I Gede Bawa Susana ◽  
◽  
I Gede Santosa ◽  
Keyword(s):  
Performance Evaluation ◽  
Thermal Performance ◽  
Room Temperature ◽  
Cooling Time ◽  
Test Results ◽  
Refrigeration System ◽  
Cooling Systems ◽  
Performance Results

The process of sending food using transportation requires a refrigeration system to keep the product fresh. Unsuitable temperatures will cause the transported products to often experience damage so that they are rejected in the mark. To achieve this, it is done through testing using a condenser with several variations of dimensions for a room temperature of 5oC. The dimensions of condenser-1 are (W 23 x H 14) inch2 x 19 mm, condenser-2 is (W 23 x H 14) inch2 x 26 mm, and condenser-3 is (W 23 x H 14) inch2 x 44 mm. The test results show that condenser-3 produces a faster cooling time compared to condenser-2 and condenser-1. Cooling time for condenser-3 is 1160 minutes, while condenser-2 and condenser-1 are 1560 minutes and 1860 minutes, respectively. Condenser-3 provides the lowest compression work of 42.131 kJ/kg compared to condensers 2 and 1, respectively 42.931 kJ/kg, and 46.147 kJ/kg. This has an impact on the COP value, namely condenser-3, condenser-2, and condenser-1 each of 3.437, 3.233, and 2.845. COP at condenser-3 occurs the highest. These results indicate that the largest condenser dimension gives the most optimum thermal performance results. An efficient refrigeration system has low compression work and high COP.

Material analysis techniques using the ion mill

1996 ◽  
Vol 54 ◽  
pp. 1034-1035
Author(s):  
J. P. Benedict ◽  
R. M. Anderson ◽  
S. J. Klepeis
Keyword(s):  
Polished Surface ◽  
Surface Material ◽  
Analysis Techniques ◽  
Material Analysis ◽  
Optical Inspection ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Argon Ions ◽  
The Impact ◽  
Scanning Electron

Ion mills equipped with flood guns can perform two important functions in material analysis; they can either remove material or deposit material. The ion mill holder shown in Fig. 1 is used to remove material from the polished surface of a sample for further optical inspection or SEM ( Scanning Electron Microscopy ) analysis. The sample is attached to a pohshing stud type SEM mount and placed in the ion mill holder with the polished surface of the sample pointing straight up, as shown in Fig 2. As the holder is rotating in the ion mill, Argon ions from the flood gun are directed down at the top of the sample. The impact of Argon ions against the surface of the sample causes some of the surface material to leave the sample at a material dependent, nonuniform rate. As a result, the polished surface will begin to develop topography during milling as fast sputtering materials leave behind depressions in the polished surface.

The Relation Between Financial Incentives, Motivation, and Performance

2017 ◽  
Vol 16 (2) ◽  
pp. 61-76 ◽  
Author(s):  
Anaïs Thibault Landry ◽  
Marylène Gagné ◽  
Jacques Forest ◽  
Sylvie Guerrero ◽  
Michel Séguin ◽  
...  
Keyword(s):  
Financial Incentives ◽  
Work Performance ◽  
Autonomous Motivation ◽  
Compensation Plans ◽  
Work Settings ◽  
Path Analyses ◽  
Three Samples ◽  
And Performance ◽  
Performance Results

Abstract. To this day, researchers are debating the adequacy of using financial incentives to bolster performance in work settings. Our goal was to contribute to current understanding by considering the moderating role of distributive justice in the relation between financial incentives, motivation, and performance. Based on self-determination theory, we hypothesized that when bonuses are fairly distributed, using financial incentives makes employees feel more competent and autonomous, which in turn fosters greater autonomous motivation and lower controlled motivation, and better work performance. Results from path analyses in three samples supported our hypotheses, suggesting that the effect of financial incentives is contextual, and that compensation plans using financial incentives and bonuses can be effective when properly managed.

Sign in / Sign up

Export Citation Format

Share Document