Summary of Mike Soucy’s presentation at PaperWeek 2026
In his presentation, Mike Soucy from Kadant examined thermocompressors from a process engineering standpoint, positioning them as a key component in optimizing steam and condensate systems in tissue machines.
At the core of the discussion was the thermodynamic imbalance inherent in many tissue machines. During operation, high-pressure steam is used to drive Yankee dryers and associated systems, while a significant volume of blow-through steam is generated to evacuate condensate from Yankee dryers. In many cases, this blow-through steam steam is only partially recovered, resulting in a loss of energy.
Process integration and steam balance
Soucy emphasized that the effectiveness of thermocompressors depends largely on proper system integration.
Key parameters include:
- Motive steam pressure and availability
- Required differential pressure across the Yankee
- Yankee operating pressure requirements
- Yankee's syphon performance curve
- Condensing load for the various production conditions
- Control strategies to maintain stable operation under variable loads
Energy efficiency and system optimization
The technical value of thermocompressors lies in their ability to convert otherwise wasted energy into productive use.
This results in:
- reduced specific steam consumption per tonne of tissue
- lower boiler load and associated fuel demand
- improved overall thermal efficiency of the steam system
Proper sizing and system analysis are therefore essential to ensure optimal performance.
A system-level approach
The presentation underscored that thermocompressors should not be viewed in isolation, but as part of a broader steam and condensate management strategy.
Their effectiveness increases when combined with:
- optimized condensate removal systems
- well-designed steam distribution networks
- accurate instrumentation and control systems
Conclusion
From a technical standpoint, thermocompressors represent a mature and effective solution for improving energy efficiency in tissue machines. By enabling the full recovery and reuse of blow-through steam, they contribute to a more balanced and efficient system. In the current context of rising energy costs and increased focus on process optimization, thermocompressors are increasingly recognized not only as auxiliary components, but as an integral part of modern steam system design.
About the Author
Vice President, Corporate Accounts at Kadant
Mike Soucy has almost 40 years of experience in the pulp and paper industry, specializing in steam and condensate systems. He is currently Vice President, Corporate Accounts at Kadant and resides in Knoxville, Tennessee. He has previously served as President of the Systems and Services Group at Kadant Johnson, President of Kadant Canada, and President of Dry-Con Inc. He also held the role of Steam and Condensate System Product Manager at Valmet Energy. Mike Soucy holds a degree in Mechanical Engineering from Lakehead University in Thunder Bay, Ontario, and is a licensed Professional Engineer in the province of Ontario.
Kadant Inc. is a global supplier of technologies and engineered systems that drive Sustainable Industrial Processing®. The company provides engineered systems and technologies that enhance efficiency, optimize energy utilization, and maximize productivity in in pulp, paper, and industrial processing.
