This study deals with the recovery of the energy available in hot and cold streams that exchanging heat. This can be done by heat exchanger network, to minimize the cost and the use of utilities. The transfer of energy from the hot stream to the cold stream depends on the rate of flow, area of the exchanger, the heat transfer coefficient and temperature gradient along each stream.
This investigation covers a study of the thermal expansion of basic lubricating oils. The three types of Iraqi base lube oil –Stocks, namely 40 Stock, 60 Stock, 150 Stock and also lubricating oil with additives from Al -Dura refinery. The investigation also covers the effect of additives on the thermal expansion coefficient of a lubricating oil.
Because of the practical importance of analyzing and controlling the systems arises the need to study the frequency response analysis for any system of several industrial plants. The frequency response used for the studies of dynamic characteristics of chemical processes and control loops in the present work. The process control implemented for different control strategies and compare between them by using frequency response techniques.
