Maintaining the performance of a fuel cell stack requires appropriate management water in membrane electrode. One solution is to apply an external humidifier supply gases. However, operating conditions change continuously, which significantly affects and gas characteristics. A straightforward module needed for integration with system model. In this study, lumped-mass model was used simulate hol...

We consider the initial-boundary value problem for an inhomogeneous time-fractional diffusion equation with a homogeneous Dirichlet boundary condition, a vanishing initial data and a nonsmooth right-hand side in a bounded convex polyhedral domain. We analyse two semidiscrete schemes based on the standard Galerkin and lumped mass finite element methods. Almost optimal error estimates are obtaine...

In this study, dispersion analysis is carried out in the Euler-Bernoulli beam with periodic lumped mass, and periodicity effects are investigated. First, relation derived using propagator matrix method for an infinitely long mass. The banded frequency spectrum given depending on mass ratio. Then, case of a finite number masses, effect wave propagation was investigated transmission function obta...

Building thermal transfer models are essential to predict transient cooling or heating requirements for performance monitoring, diagnosis and control strategy analysis. Detailed physical models are time consuming and often not cost effective. Black box models require a significant amount of training data and may not always reflect the physical behaviors. In this study, a building is described u...