— CSP technologies are well developed and offer many advantages compared to other renewable energy options. They can also be very effective in many locations with high solar radiation around the world. However today they are less competitive than other technologies. Understanding the limitations, and identifying opportunities for improvements, requires a detailed analysis of the energy conversi...

an optimal design and fabrication of compressors requires flow investigation through the compressor components. flow field inside the volute is fully three dimensional and turbulent. better understanding of flow mechanism leads to improve the volute design procedure. in this research the experimental and numerical flow investigation through a radial flow compressor volute are performed to recog...

To evaluate the temporal relationship between blood flow, blood pressure, and muscle contractions, we continuously measured femoral arterial inflow with ultrasound Doppler at onset of passive exercise and voluntary, one-legged, dynamic knee-extensor exercise in humans. Blood velocity and inflow increased ( P < 0.006) with the first relaxation of passive and voluntary exercise, whereas the arter...

Qualitatively, it is known that the reactants content within the catalyst layer (CL) is the driving moments for the kinetics of reaction within the CL. This paper aimed to quantitatively express the level of enhancement in electrical power due to enrichment in the oxygen content. For a given MEA, a flow field (FF) designer is always willing to design a FF to maximize the content of oxygen in al...

Analysis of non-laminar flows in coarse alluvial beds has a wide range of applications in various civil engineering, oil and gas, and geology problems. Darcy equation is not valid to analyze transient and turbulent flows, so non-linear equations should be applied. Non-linear equations are classified into power and binomial equations. Binomial equation is more accurate in a wide range of velocit...

To allow efficient and user-friendly development of a component-based application, component systems have to provide a rather complex development infrastructure, including a tool for component composition, component repository, and a runtime infrastructure. In this paper, we present and evaluate benefits of using meta-modeling during the process of defining a component system and also during cr...

In this paper, a robust local controller has been designed to balance the power for distributed energy resources (DERs) in an islanded microgrid. Three different DER types are considered in this study; photovoltaic systems, battery energy storage systems, and synchronous generators. Since DER dynamics are nonlinear and uncertain, which may destabilize the power system or decrease the performanc...

In this work, the effects of N2 addition to SF6 plasma used in isotropic silicon etching Micro-electromechanical systems (MEMS) with Au components are investigated. A four-variables Doehlert design was implemented for optimizing parameters (power, pressure, gas flow rate, and N2/SF6 ratio) maximize lateral etch rate Si using SF6/N2 mixture. The optimized condition founded a 1.8 µm/min was: powe...

A milliwatt power s~urcc (MPS) has been developed to satisfy the rcquircments of scvcral potcntial solar system cxploration missions. Thc MPS is a small power source consisting of thrce major componcnts: a spacc qualified heat same (RHU), a thermopile (thermoelectric convcncr or TEC) and a containcc to dircct the RHU heat to the TEC. Thermopiles from Hi-Z Technology, Inc. of San Diego and thc I...