Heat transfer data from measurements covering 15 Roberts evaporator vessels at 3 mills (82 data sets total) is presented. Heat transfer coefficient (HTC) is plotted against brix, temperature, temperature difference ( At) and viscosity respectively. It is shown that the influnce of At on HTC cannot be deduced from this type of data. The pronounced difference in operating conditions between last ...

In this paper, the performance of the cutting tool with nanocrystalline multilayer coatings (TiN+TiAlN) for machining of superalloy Inconel 718 in the dry and wet conditions was studied. The multi layer TiN and TiAlN with nanocrystalline structure was applied by physical vapor deposition technique (arc evaporation) on the WC-Co inserts. The results of the ball on disc wear test and the machinin...

The mathematical model to predict the performance and the exergetic efficiency in a multi-effect desalination system with thermal vapor compression (MED-TVC system) has been presented. The energy and the concentration conservation law were developed for each effect, considering the boiling point elevation and the various thermodynamic losses by developing the mathematical models. These analyses...

Some recent results of molecular dynamics simulations of the condensation/evaporation and velocity distribution of n-dodecane (C12H26), the closest approximation to Diesel fuel, at a liquid-vapour interface in equilibrium state are briefly described. It is shown that molecules at the liquid surface need to gain relatively large translational energy to evaporate. Vapour molecules with large tran...

Abstract One of the key limiting factors in evaporation rate sessile droplets is evacuation generated vapour away from liquid-air interface. In absence convection, main driving mechanism diffusivity: as mass diffusion quite a slow process, this generally leads to small rates. For liquids with heavy vapour, natural convection induced by density gradients cloud can increase significantly on groun...

Organic Rankine Cycles (ORC) and Trilateral Flash (TFC) are very similar power cycles; ideally, they have a reversible adiabatic (isentropic) compression, an isobaric heating, isentropic expansion cooling. The main difference is that for ORC, the heating includes full evaporation of working fluid (prior expansion); therefore, starts in saturated or dry vapour state, while TFC, terminates upon r...

Reductions in fossil fuel use and increases in system efficiency are required to make space heating more environmentally benign. Ground loop heat pumps offer an alternative heating solution that is more environmentally benign than conventional methods. Past studies of these heat pumps have usually focused on basic system arrangements, but new advanced systems are being developed. Here, energy a...