A summary of the available literature on heat transfer to liquid-solid fluidized beds is presented. The influence of process parameters such as bed geometry, flow velocity, and fluid and particle properties on heat transfer is discussed. 36 correlations based on various models or empirical assumptions are presented. The predictions of the correlations are compared with a database comprising 2665 measured data for a variety of fluids and particles. A new empirical correlation is developed which predicts the measurements better than published correlations.