it is about delay time compensation
Hi all : Please, I need some help on Heat Radiation Transfer: How I can derive the formula of the View Factor for a particular configuration, in a way of ending with an expression for the VF as...
15 May 2020 4,929 6 View
Hi all , How can I consider the Optical properties of a surface into the Stefan-Boltzmann law for a problem of Radiation Heat Transfer between a hot Body and a real Surface (namely, a surface...
15 May 2020 9,449 8 View
Dear all : I need to solve the following integral (attached as an image file) The context is on the calculation of View Factors in Radiation Heat Transfer I worked out the this expression from...
15 May 2020 7,500 16 View
Hi all, I'm trying to perform a calculation on the Flux due only to radiation, received at the surface of a Flat Plate Solar Collector placed on the surface of the Earth. The collector is tilted...
14 May 2020 604 24 View
What is a good way (finite element software) to simulate mortar properties between masonry, such as how to model more effective?
09 April 2020 2,381 3 View
Dear all : I'm trying to solve the following problem using COMSOL Multyphysics. I have an enclosed geometry (please see the attached images) with a top flat surface (the celing) and an undulated...
19 March 2020 7,455 5 View
Dear all: I need help, I hope there is someone out there who can help me. I finish drawing the 2D geometry of an Air Solar Collector with an undulated absorber plate (in contrast with a flat...
19 March 2020 5,935 9 View
Hello to all : This question is originated from the idea that every material (except for Superconductors) has a Seebeck Coefficient (S) different than zero, and from the idea that in every case...
19 March 2020 4,192 5 View
Dear Colleagues : Does anyone have literature referencing the diffusion process of Carbon (I mean Carbon atoms) into Bismuth Telluride (Bi2Te3) or into some other compound alike ? E.g. PbTe,...
05 March 2020 2,976 2 View
Hello to all: I'm trying to think in the following interesting problem: I have a system which are polycrystals (grains) of Bi2Te3 (actually this compound is a quaternary alloy of Bi, Te, Se and...
05 March 2020 4,832 3 View
According to my experience most of the selected journals during paper submission are based on journal text matching suggested results from Springer, Elsevier,,,Etc. then the manuscript happened to...
01 March 2021 1,786 3 View
Hi everybody, currently, I am working on the grid-connected inverter. I want to make my grid-connected PV system a PLL-less system. I have studied some reachers are implementing a virtual...
07 February 2021 6,078 2 View
Hey, I try to run my 4 pole IPMSM with PWSVM and use a typical controller with PI-controller with a current loop and speed loop. When I run my system with DC-supply 100 V with a steady-state speed...
28 January 2021 7,354 8 View
i tested boost converter with MPPT and single phase offgrid inverter with close loop control separately. They work fine but when i connect them boost converter doesn't give the output as it did...
17 January 2021 6,428 6 View
I am designing a control system for Hybrid renewable energy systems using Matlab/simulink/simscape, but currently having a problem. Whenever I run the simulation, I get the error shown below. "The...
12 January 2021 2,142 5 View
dear all would you help me to find a scops journal in the field of chemical engineering with fees as I want to publish in a short time. thank you [email protected]
23 December 2020 6,883 1 View
It's hard to understand for me. And I need answers really quick. Hope you can help me.
21 December 2020 8,140 2 View
I need to measure the CCT from rotor angle graph >> is it possible ? HOW? it will be highly appreciated, if you advice any method to calculate the CCT
17 December 2020 8,763 2 View
If you have solar PV panels and a grid-tied inverter, what happens if the system is connected to the grid without a net meter?
13 December 2020 8,874 3 View
Hello everyone, I have two questions and I would like it if you could help me out please. I need to know, in your opinion, what is the most efficient PV panel configuration between a distributed...
09 December 2020 4,606 7 View
