The thermal-power-plant condenser tubes, conducting cooling seawater, experienced frequent leakages, prompting the hereby presented failure analysis. Visual inspection of corroded/ruptured tube segments revealed that localized corrosion may be linked to seawater sediments and thick layers products at water side. Sediments were found along bottom adjacent point contact between baffle plates exte...

A heat pump system requires proper refrigerant charge amount. Once refrigerant is charged into a heat pump system, its charge amount is fixed. For this reason, prediction of optimal refrigerant charge amount is very important in order to yield best performance. Too low charge amount degrades capacity of heat pump. On the other hand, excessive charge amount decreases coefficient of performance (...

A fast and simple method for the oxidative iodination of some aromatic amines, under microwave irradiation, is reported, using diiodine and the the strongly Hbonded urea-hydrogen peroxide addition compound (H2NCONH2···H2O2, UHP) as the oxidant. The reactions were carried out in boiling CHCl3 under a reflux condenser to afford, within 10 minutes, the purified monoiodinated products in 40-80% yie...

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...