disclosed herein is a fracturing unit for hydraulic fracturing having an engine and a fracturing pump connected to the engine through a variable speed torque converter . also disclosed is a hydraulic fracturing system using multiple fracturing units which are sized similar to iso containers . a hydraulic fracturing system may also force flow back water , produced water , or fresh water through a heat exchanger so that heat from the fracturing engines can be transferred to these liquids in order to vaporize them . a force cooled fractioning unit then can accept the vapor / steam in order to condense the various components and produce distilled water for re - use in the fracturing process or for release into the environment .