Developing of Practical Relations for Energy Analysis of Combined Heat and Power Generation Systems in Bandar-Abbas Oil Refinery Company

In this paper, the energy analysis of Combined Heat and Power (CHP) generation systems of Bandar Abbas Oil Refining Company is performed. In order to investigate the importance of variables affecting the performance of CHP units, sensitivity analysis has been carried out for each of the variables. In this study, in order to facilitate the display of real-time energy efficiency on Distributed Control System (DCS) in the control rooms, the equations for calculation of efficiency have been simplified. The results show that in the case of using design data, the CHP units A, B, C, D and E have energy efficiency of 87.3, 87.3, 87.3, 83 and 75.7%, respectively. Furthermore, when operational data is used, the energy efficiency of these units is calculated as 43.67, 57.3, 57.17, 68.94 and 70.27%, respectively. The results of sensitivity analysis also show that the lower heating value of fuel with 9.74%, the steam flow of the heat recovery steam generator with 6.07% and the inlet water temperature with 4.3% have the greatest effect on efficiency.