Equipped with its Solver and-in and VBA, Microsoft Excel makes an ideal educational platform for design analyses of fluid-thermal systems. This paper illustrates this capability by considering a common type these systems; which is the double-pipe heat exchanger. While used optimisation analysis, VBA development user-defined function (UDF) that determines optimum standard-pipe size system.

Multiple loop heat pipes which have two evaporators and two condensers in one loop are a kind of active heat transfer device. Since they have two evaporators and two condensers, the operating mode also becomes multiple. This work discusses the cases that multiple loop heat pipes were operated with one condenser at high temperature and the other at low temperature. To avoid the high temperature ...

Aim of this study is to evaluate a new three-equation turbulence model applied to flow and heat transfer through a pipe. Uncertainty is approximated by comparing with published direct numerical simulation results for fully-developed flow. Error in the mean axial velocity, temperature, friction, and heat transfer is found to be negligible. Keywords—Heat Transfer, Nusselt number, Skin friction, T...

The Habanero 1 and 3 doublet is the major component in the original electricity generation plan for the Geodynamics geothermal project in the Cooper Basin of South Australia. Various heat extraction studies have been conducted using simplified models such as a single fracture connecting the two wells or an equivalent porous medium representing the reservoir. In our approach, a more realistic fr...

We report novel flexible thermal ground planes (FTGPs) based on heat pipe technology. FTGP’s effective thermal conductivities are much higher than those of copper and graphite heat spreaders’. We report mylaraluminum, copper-Kapton, and all-polymer FTGP prototypes and advanced technologies which will further enable high-performance FTGPs.

The new geometrical design of stand-pipe air distributor for the combustion of the municipal solid waste was presented. The new design of the air distributors enables penetration of incombustible and unburnt carbon through opening between the air distributors, thus providing easy maintenance work. The fluidized bed experimental rig was constructed using Perspex column in which air was supplied ...

The generation of electricity from solar thermal source has continued to garner more attention due to the very attractive environmental performance, the applicability to small distributed users and as alternative to the fossil fuels power generation. Indeed, solar thermal energy, through the coupling with ORC systems, becomes fit for electric power generation as well and, with a proper thermal ...

Electromagnetic Formation Flight (EMFF) is a novel propellantless propulsion technology for formation flying satellites. Actuation in relative degrees of freedom for formation flight satellites is provided using electromagnetic forces and reaction wheels. One application for EMFF is stationkeeping for fractionated spacecraft architectures. The benefit of EMFF is that by replacing thrusters for ...

recently, the use of renewable energies has increased to  environmental pollution, limitation of fossil energy resources and energy security  one of the means that enable us to use such energies is fuel cells (fc). however, there are many problems  in the commercialization of fc from an economically and operation perspective. one of the most important problems is heat management. new heat pipes...

1.1 The computer programs included in this practice provide a calculational procedure for predicting the heat loss or gain and surface temperatures of insulated pipe or equipment systems. This procedure is based upon an assumption of a uniform insulation system structure, that is, a straight run of pipe or flat wall section insulated with a uniform density insulation. Questions of applicability...