The main purpose of the simulation program presented in this study is to analyse the compression of CO 2 from low to high pressure suitable for pipeline transport. The program is flexible in the sense that the number of compression stages can be specified. The program also includes modelling of liquefaction of CO 2 at any pressure below the critical point with subsequent pumping to the final desired pressure. The program calculates required compression power, cooling duty, liquefaction duty as well as refrigeration power (by refrigerant vapour compression) and pumping power. In addition, the program provides CAPEX estimates, OPEX estimates, and it calculates the levelised cost of CO 2 compression (LCOCC). This allows a full techno-economic analysis providing a basis for minimizing both energy and levelised cost of transporting CO 2 .