in this article the effect of fouling on tube side and the overall performance of preheat exchangers of crude distillation unit of petroleum refinery have been investigated. for this purpose the experimental data of australian light crude oil in surface temperature of 200-260oc and the velocity between 0.25 to 0.4 m/s have been used. first, an overall dirty heat transfer coefficient was calcula...

An existing commercial scale low temperature R-502 refrigeration plant has been extensively instrumented for evaluating R-502 long term replacements R-404A, R-407A and R-507. This installation is part of the refrigeration plant located at the Thermal Technology Centre. The R-502 retrofit test facility has an internally compounded two stage 40 HP reciprocating compressor equipped with desuperhea...

A wide variety of heating and cooling applications use heat exchangers. The increase in energy prices, the requirement for size reduction, restriction on greenhouse gas emissions has led to need finding ways develop efficient cost-efficient way enhance model a exchanger by visualizing effects design parameters is using Computational Fluid Dynamics (CFD). reason this exploration was lead an exam...

This paper presents an interactive finned-tube evaporator and condenser design program, EVAP-COND (ver. 3), which incorporates a computational intelligence module, ISHED (Intelligent System for Heat Exchanger Design), for optimization of refrigerant circuitry. This paper presents ISHED’s design, its function, the parameters controlling an optimization run, selected examples of ISHED experimenta...

In this experiment effect of two full and half width sinusoidal inner tubes in triplex-tube heat exchanger with phase change material (PCM) was investigated. Length and diameter of the tubes have been chosen such that the area of each tube to be the same. Charging and discharging processes were carried out by inner tube, outer tube and both. Results indicated, PCM melting and solidification tim...

A MODEL OF AN AIR-CONDITIONING CONDENSER AND EVAPORATOR WITH EMPHASIS ON IN-TUBE ENHANCEMENT Kuo-Hsiu Huang Michael B. Pate Mechanical Engineering Department Iowa state University Ames, Iowa 50011 A computational model for air-conditioning condensers and evaporators with in-tube enhancement has been developed. The purpose of this model is to provide a tool for the design of plate tinned-tube he...

Abstract To verify the operational feasibility of plate-and-tube evaporative cooling frost-free heat pump exchanger and its influence factors, a single was selected as simulation object, VOF model, RNG k-ε self-programmed UDF program were used to control water vapor transfer mass air flow rate on internal law model. The results show that velocity increases, percentage turbulent inside model sol...