1. A system configured to facilitate design of a direct electric heating system for a subsea pipeline carrying petrochemicals, the system comprising: one or more processors configured to execute computer program modules, the computer program modules comprising: an input reception module configured to define an input graphical user interface configured to receive entry and/or selection of input values for a target heat to be generated by the direct electric heating system and for a set of heating system parameters that define various aspects of the direct electric heating system including a pipeline through which petrochemicals are flown and cables used for direct electric heating within the pipeline; an input communication module configured to pass input values received through the input graphical user interface to a modeling application that implements the input values in a finite element analysis to determine an output value for required current through the direct electric system required to attain the target heat; an output communication module configured to receive output values from the modeling application for required current through the direct electric system required to attain the target heat and for electrical parameters of the direct electric heating system operating at the target heat; and an output presentation module configured to define an output graphical user interface configured to present one or more of the output values received from the modeling application to the user.