Traditionally, manufacturers use steam for indirect heat transfer applications. Steam based heat transfer systems may seem beneficial because water is cheap, easy to source and has a very low environmental impact.
However, to operate effectively, steam based systems require additional equipment such as surge tanks, water softener and blowdown heat recovery technology.
Instead, thermal fluid systems are simpler and cheaper because, unlike steam, they do not have to work at high pressure to maintain a constant temperature. Heat transfer oils offer excellent thermal stability at the intended operating temperature, can operate for extended periods of time and manufacturers can control the temperature based on the application.