(800) 952-0121          email icon1 

The Hydro-Thermal Hydroheater is the genuine Jetcooker and has been a part of slurry mashing heating for over thirty years. Although it is a staple at many ethanol facilities, some facilities haven’t fully optimized their Hydroheater. If you aren’t taking the time to find your ideal inlet temperature and differential pressure, then you might be missing out on additional yield later in your process*.

K610 All PhasesOptimal Hydroheater Outlet Temperature Set Point

Determining your optimal outlet temperature is dependent on a lot of factors. Specifically, your feedstock and enzyme supplier will play a part in your ideal temperature.

Typically, hammer mill to a sieve size corn has an ideal outlet temperature of 210-215°F (99- 101°C). Using a blended feedstock, you should set the temperature higher – around 220-225°F (104-107°C). It is essential to determine ideal or optimal temperature set points based on your plant’s specific operating conditions.


Differential Pressure Recommendations


Differential pressure is also dependent on your feedstock. Typically, corn has an ideal differential pressure of 40 psi, while a blended feedstock has a slightly higher perfect differential pressure of 45 psi. The Jetcooker should be run to various shear to measure the sugar results to get the ideal differential pressure set point based on the plant’s specific operating conditions.


 Achieving the correct differential pressure has many benefits, including:

  • Taking advantage of all benefits the Hydroheater offers
  • Steam efficiency
  • Enzyme efficiency
  • Shear optimization to maximize the conversion of starch to sugars

Understanding Abrasiveness

The Jetcooker works at optimal levels when it is well-maintained and optimized, allowing you to achieve precise temperature control and optimal yield later. Knowing how abrasive your mash a driving factor in forecasting is how often you should rebuild (and even replace) your Hydroheater. Abrasive materials can wear away at parts over time, affecting the heater’s efficiency, making annual maintenance essential. Maintenance of your heater is critical.


Achieving the ideal yield, producing desirable co-products, and reducing energy usage highlight the many challenges facing Ethanol producers. The Jetcooker is ideally suited to help ensure a maximum output during the mashing process is achieved or efficiently reduce energy usage per bushel.

Need more information about optimizing your Jetcooker? Contact one of our steam experts today to ensure that you take full advantage of all the Hydroheater benefits.

*Please note that the suggestions made are based on a typical facility. You may need to adjust the conditions to achieve your ideal production results.

HTC.logo.white1 01

Hydro-Thermal is the global leader in the development and manufacturing of Hydroheaters. Through our vast global channel partners, we support hydro heating in six continents and all industrialized areas. We create heating systems for a variety of industries including: pulp, paper, chemical, ethanol, food & beverage, metal, & more!

Hydro-Thermal Corporate 

400 Pilot Court
Waukesha, WI 53188 USA
Phone: (262) 548-8900
Fax: (262) 548- 8908