A numerical simulation of a liquid overfeed system working with pure refrigerants in steady state conditions has been performed. The global algorithm is based on the sequential resolution of the different elements of the system (compressor, evaporator, condenser, ... ). For each element, a simplified mathematical model based on global balances of mass, momentum and energy is used. For the evapo...

Mathematical model for a multiple effect evaporator system with condensate-, feedand productflash and steam splitting Ravindra Bhargava, Shabina Khanam*, Bikash Mohanty & Amiya K Ray Department of Chemical Engineering, Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247 667, India Department of Chemical Engineering, National Institute of Technology Rourkela, Rour...

The objectives of this study are to provide experimental data and a correlation that can be used in the optimal design of an evaporator under frost conditions. In the present study, we tested both a single stage and a two-stage evaporator with a variation of operating parameters and fin geometry under frost conditions. The effects of tube space and fin alignment on the heat transfer performance...

The rehabilitation ol' thc Xinavane sugar factory in Mozambique necessitated a redesign of the evaporator station. The particular arrangement at Xinavane proved to be extremely sensitive to changes i n operating parametcrs. Using this evaporator station as an example, the concept of design robustness (suitability under a range of operating conditions) is introduccd. A rigorous evaporator simula...

An electron beam evaporator has been assembled, tested and used for deposition of thin nickel films. Flux and deposition rates has been measured with an oscillating quartz crystal monitor (QCM), an ion sensor wire, and visible deposition on a mirror on front of the evaporator. A thin nickel rod of 2 mm diameter was found to improve the pressure in comparison to a 6-mm nickel rod. The flux was t...

Heat pipe is a device that transports heat with minimal temperature drop using the latent heat of fluid in a closed container. In vertical type named as thermosyphon (Wickless), capillary action is replaced by the gravitational force, this condenser is placed above evaporator. In this paper, to investigate the effect of inlet air temperature and the air mass flow rate was studied. The temperatu...

The last stage in the design process for a chemical product is its manufacture, where the purification has an important role. Short-path evaporation is a safe method suitable for separation and purification of thermally unstable materials. In this work the process modelling and a systematic strategy of solution is presented for a short-path evaporator to obtain the desired product specification...