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Continuous-Flow Microwave Milk Sterilisation System Based on a Coaxial Slot Radiator
Junhui Guo1, Huacheng Zhu1, Yang Yang1
1College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China.
Foods (Basel, Switzerland)
|February 11, 2023
Summary
This study introduces a novel microwave continuous-flow milk sterilization system using a coaxial slot radiator. The new system ensures efficient and uniform heating, overcoming limitations of traditional circular pipes for improved food processing.
Area of Science:
- Food Science and Technology
- Microwave Engineering
- Heat Transfer
Background:
- Microwave continuous-flow liquid food sterilization offers rapid, energy-efficient processing with minimal nutrient loss.
- Traditional circular pipe systems suffer from uneven heating due to microwave focusing, impacting sterilization efficacy.
- Need for improved microwave heating uniformity in continuous-flow systems for liquid foods.
Purpose of the Study:
- To propose and design a novel microwave continuous-flow milk sterilization system utilizing a coaxial slot radiator.
- To optimize the system design for enhanced heating efficiency and uniformity.
- To validate the simulation results through experimental verification.
Main Methods:
- Design of a coaxial slot radiator for efficient microwave radiation.
- Establishment of a multi-physics model for system simulation and optimization.
- Simulation of microwave coaxial slot radiator rotation to assess heating uniformity.
- Experimental setup and validation of simulation findings.
Main Results:
- The coaxial slot radiator design achieved efficient microwave radiation.
- System optimization significantly improved heating efficiency and uniformity compared to conventional methods.
- Simulations demonstrated that rotating the radiator further enhanced heating uniformity.
- Experimental results closely matched simulation predictions, confirming system performance.
Conclusions:
- The proposed microwave continuous-flow milk sterilization system with a coaxial slot radiator effectively addresses uneven heating issues.
- The system demonstrates robust performance, maintaining efficient and uniform heating across varying liquid food dielectric properties.
- This technology offers a promising advancement for industrial liquid food sterilization.
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