Performance Analysis of a Modified Laboratory Hammer Mill: Field Test Results from Different Tropical Crops

In order to facilitate system design and performance analysis, a virtual prototype for metro train electropneumatic brakes is proposed. A virtual braking environment that consists of a three-car train model and six electropneumatic brakes model is elaborated. The virtual braking environment can be used to research the relation between braking response and electropneumatic brake’s parameters and to simulate axle loading transfer. By comparing the simulation results with bench test data, the electropneumatic brake model is proven to be quite accurate. Based on the proposed virtual prototype, a test train brake is designed, and a couple of field tests are carried out. The average deceleration of electropneumatic compound service brake at the initial speed of 45 km/h is 0.83 m/s2, the braking distance is 94 m, and that of pure air service brake at the speed of 43 km/h is 0.64 m/s2, the braking distance is 111 m. The field test results satisfy the test train requirements, which further proves the effectiveness of the proposed virtual prototype.

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Long Term Field Test Results of Experimental EPDM and PUF Roofing

10.21236/ada226197 ◽

1990 ◽

Author(s):

David M. Bailey ◽

Stuart D. Foltz ◽

Myer J. Rosenfield

Keyword(s):

Field Test ◽

Test Results ◽

Term Field

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Identifying Personality Disorders that are Security Risks: Field Test Results

10.21236/ada564011 ◽

2011 ◽

Cited By ~ 3

Author(s):

Olga G. Shechter ◽

Eric L. Lang

Keyword(s):

Personality Disorders ◽

Field Test ◽

Test Results ◽

Security Risks

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Performance Analysis of the Test Results on a Two-Stage Transonic Fan

Journal of Engineering for Power ◽

10.1115/1.3227372 ◽

1983 ◽

Vol 105 (1) ◽

pp. 125-129

Author(s):

Baoshi Chen ◽

Tianyi Zhang

Keyword(s):

Mach Number ◽

Performance Analysis ◽

Radial Distribution ◽

Flow Separation ◽

High Load ◽

Test Results ◽

Two Stage ◽

Stall Margin ◽

High Incidence ◽

Transonic Fan

Test results obtained from a two-stage fan are analysed and the reasons that caused the design performance target not to be attained are presented in this paper. Addition of a partspan shroud on rotor 1 caused higher losses and changed radial distribution of parameters. Modification on the flowpath and chord length of stator 1 resulted in excessively high inlet Mach number and flow separation in the hub region. The high load and high incidence at the hub of rotor 2 caused higher losses and reduced stall margin of the fan.

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Estimation of Outdoor PM2.5 Infiltration into Multifamily Homes Depending on Building Characteristics Using Regression Models

Sustainability ◽

10.3390/su13105708 ◽

2021 ◽

Vol 13 (10) ◽

pp. 5708

Author(s):

Bo-Ram Park ◽

Ye-Seul Eom ◽

Dong-Hee Choi ◽

Dong-Hwa Kang

Keyword(s):

Regression Analysis ◽

Correlation Analysis ◽

Field Test ◽

Outer Surface ◽

Regression Models ◽

Field Tests ◽

Test Results ◽

Correlation And Regression Analysis ◽

Building Characteristics ◽

Pm2.5 Concentration

The purpose of this study was to evaluate outdoor PM2.5 infiltration into multifamily homes according to the building characteristics using regression models. Field test results from 23 multifamily homes were analyzed to investigate the infiltration factor and building characteristics including floor area, volume, outer surface area, building age, and airtightness. Correlation and regression analysis were then conducted to identify the building factor that is most strongly associated with the infiltration of outdoor PM2.5. The field tests revealed that the average PM2.5 infiltration factor was 0.71 (±0.19). The correlation analysis of the building characteristics and PM2.5 infiltration factor revealed that building airtightness metrics (ACH50, ELA/FA, and NL) had a statistically significant (p < 0.05) positive correlation (r = 0.70, 0.69, and 0.68, respectively) with the infiltration factor. Following the correlation analysis, a regression model for predicting PM2.5 infiltration based on the ACH50 airtightness index was proposed. The study confirmed that the outdoor-origin PM2.5 concentration in highly leaky units could be up to 1.59 times higher than that in airtight units.

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