الفهرس 
Chapter One: Introduction and Literature ReviewOnly 14 pages are availabe for public view
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Abstract
An un-baffled shell-and-tubes heat exchanger design with respect to heat transfer coefficient and pressure DROP is investigated experimentally and CFD modeling. Overall Heat transfer coefficients were estimated for two-phase flow in shell and tubes heat exchanger for different flow patterns. A two-phase heat transfer experimental setup was built for this study and a total of 44 two-phase heat transfer data with different flow patterns were obtained. For these data, the superficial Reynolds number ranged approximately between (650-4,000) and (27,000-170,000) for the liquid (ReSL) in first and second heat exchangers respectively and ranged approximately between (2,600-11,000) and (87,000-162,000) for the gas (ReSG) in the first and second heat exchanger respectively.The temperature and velocity profiles are examined in detail.
Results indicate to the overall heat transfer coefficient (U) and pressure DROP 〖(∆P〗_pipes) increases with ReSG increases for a fixed ReSL. Overall heat transfer coefficient (U) increase for low ReSL with increase ReSG in which ranged between (2-8%) and (3-21%) for first and second heat exchanger respectively, but for high ReSL the overall heat transfer coefficient is increased gradually when increase ReSG for both heat exchangers in the range between 0.5-1% and from 10 to 14% for first and second heat exchangers respectively.
An un-baffled shell-and-tubes heat exchanger design with respect to heat transfer coefficient and pressure DROP is investigated experimentally and CFD modeling. Overall Heat transfer coefficients were estimated for two-phase flow in shell and tubes heat exchanger for different flow patterns. A two-phase heat transfer experimental setup was built for this study and a total of 44 two-phase heat transfer data with different flow patterns were obtained. For these data, the superficial Reynolds number ranged approximately between (650-4,000) and (27,000-170,000) for the liquid (ReSL) in first and second heat exchangers respectively and ranged approximately between (2,600-11,000) and (87,000-162,000) for the gas (ReSG) in the first and second heat exchanger respectively.The temperature and velocity profiles are examined in detail.
Results indicate to the overall heat transfer coefficient (U) and pressure DROP 〖(∆P〗_pipes) increases with ReSG increases for a fixed ReSL. Overall heat transfer coefficient (U) increase for low ReSL with increase ReSG in which ranged between (2-8%) and (3-21%) for first and second heat exchanger respectively, but for high ReSL the overall heat transfer coefficient is increased gradually when increase ReSG for both heat exchangers in the range between 0.5-1% and from 10 to 14% for first and second heat exchangers respectively.