Abstract: In this research kerosene is used as coolant instead of water in the respect of identical and distinct properties.The heat transfer coefficient along full flow path has obtained with the kerosene coolant through an even heated straight tube,and relation between the heat transfer cooling of kerosene and water has been determined in the case of the vapor liquid two phase boiling flow.The key problem of the kerosene used as coolant is “coking property” and instability of wall temperature.However,it does happen in some particular working conditions,but the working conditions can be regulated with an empirical formula for the initial point annular flow Z N to eliminate the coking zones.The Several useful conclusions have been drawn for the cooling passage of turbine vane.