System To Heat Water For Hydraulic Fracturing

A geologic formation hydraulic fracturing system, comprising:

• a) a transportable heating apparatus including a direct contact heater capable of increasing temperature of an amount of water at ambient temperature by up to about 40 degrees Fahrenheit (about 22 degrees Celsius) while continuously maintaining a flow rate of said amount of water of up to about 700 gallons per minute;
• b) a water inlet fitting configured to connect said transportable heating apparatus to a first water flowline which delivers said amount of water at said ambient temperature from a water source;
• and
• c) a water outlet fitting configured to connect said transportable heating apparatus to a second water flowline which delivers said amount of water to one or more fracturing pumps which inject said amount of water into a wellbore at sufficient pressure to hydraulically fracture a geologic formation.