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Author: search.filters.author.Boksuwan, SungwanSubject: search.filters.subject.HERMS

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    Developing HERMS Temperature Control: A Study on PID-P and PI-P Cascade Control
    (2025-01-01)
    Panaudomsup, Sumit
    ;
    Subhagandha, Thanachok
    ;
    Chanma, Kittidach
    ;
    Boksuwan, Sungwan
    The Heat Exchange Recirculating Mash System (HERMS) is widely utilized in craft brewing to maintain precise temperature control during the mashing process, which is critical for optimizing enzymatic activity and mash efficiency. This study explores the performance of two cascade control configurations: (1) a PID-P system, where an outer PID loop regulates an inner P loop, and (2) a PI-P system, where an outer PI loop regulates an inner P loop. The system was modeled using First-Order (FO) models, with control parameters optimized using Skogestad's tuning method. Simulations in MATLAB Simulink and real-world experimental validation were conducted to evaluate temperature stability, response time, energy efficiency, and wort quality. Results demonstrate that while both control strategies effectively maintain mash temperature, the PI-P configuration offers improved energy efficiency and reduced power fluctuations, making it more suitable for precision brewing applications. These findings contribute to optimizing HERMS temperature control, enhancing consistency, and reducing energy consumption in both home and industrial brewing setups.
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    Developing Efficient Temperature Control for HERMS: A Study on P, P-Logic, PI, and PID Controllers
    (2025-01-01)
    Subhagandha, Thanachok
    ;
    Boksuwan, Sungwan
    The Heat Exchange Recirculating Mash System (HERMS) is widely used in craft brewing to maintain precise temperature control during the mashing process, which is crucial for achieving optimal sugar extraction and mash efficiency. This study investigates the performance of four different temperature control strategies-P, P-logic, PI, and PID-in maintaining the desired mash temperature profile. The system was modeled using both First-Order Plus Delay (FOPD) and Second-Order Plus Delay (SOPD) models to optimize controller gains through Skogestad's method. Validation of the control strategies was conducted through simulations in MATLAB Simulink. The results showed that while P-logic control maintained stable temperature with 0% overshoot, PI and PID controllers achieved the same with only 30% input energy, compared to 100% used by P-logic. A real-world mashing is conducted with P-logic control. Wort quality was also assessed, with specific gravity, pH, and mash efficiency analyzed. This study highlights the trade-offs between control precision and energy consumption, providing valuable insights for improving HERMS system efficiency in both homebrewing and commercial applications.