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A Hybrid Simulation Model To Predict The Steady-State Thermal Profile Of Hermetic Reciprocating Compressors, Fernando A. Aardoom, Victor H. P. Rosa, Cesar J. Deschamps
A Hybrid Simulation Model To Predict The Steady-State Thermal Profile Of Hermetic Reciprocating Compressors, Fernando A. Aardoom, Victor H. P. Rosa, Cesar J. Deschamps
International Compressor Engineering Conference
Numerical simulation models are paramount to design compressors that follow reliability and efficiency requirements. This paper presents a simulation model to predict the steady-state thermal profile of hermetic reciprocating compressors. A finite element method is used to compute the temperature distribution of the solid components and the fluid in the suction and discharge lines, whereas a lumped-parameter formulation is used to evaluate the internal environment temperature and the gas temperature at the end of the compression cycle. The heat transfer between the gas and the solid components is predicted using imposed convective heat transfer coefficients; some of which are estimated …
Evaluating Reserve Strength Of Girder Bridges Due To Bridge Rail Load Shedding, Yao Wang, Mirela D. Tumbeva, Ashley P. Thrall
Evaluating Reserve Strength Of Girder Bridges Due To Bridge Rail Load Shedding, Yao Wang, Mirela D. Tumbeva, Ashley P. Thrall
JTRP Technical Reports
This research experimentally and numerically evaluated the reserve strength of girder bridges due to bridge rail load shedding. The investigation included: (1) performing non-destructive field testing on two steel girder bridges and one prestressed concrete girder bridge, (2) developing validated finite element numerical models, and (3) performing parametric numerical investigations using the validated numerical modeling approach. Measured data indicated that intact, integral, reinforced concrete rails participate in carrying live load. Research results culminated in recommendations to evaluate the reserve strength of girder bridges due to the participation of the rail, as well as recommendations for bridge inspectors for evaluating steel …