Abstract: An energy consumption evaluation model for atmospheric and vacuum distillation unit of refineries was set up and the model was used to analyze the energy balance of a case unit based on its operation data. From this analysis, the evaluation indexes of energy utilization for the unit and relative devices were obtained, and a comprehensive evaluation was made for the status of energy consumption. The amount, causes and distribution of energy consumption were discussed, the weak parts of energy using were found and some suggestions for energy conservation were proposed. This energy consumption evaluation model is simple and easy to be used; furthermore, the error of data obtained from this model and the standard calculation results is about 2.4%, indicating this method is reliable.

Key words: atmospheric and vacuum distillation unit, energy balance, energy consumption