Pasteurization Plant Heat Pump Energy Management
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Solution Overview
Problem
Existing pasteurization plants face inefficiencies in energy management due to varying operation conditions, limiting the exploitation of heat pumps' energy efficiency.
Innovation Solution
The implementation of a method and plant design that utilizes multiple pasteurization lines with a heat pump system, where heated and cooled liquids are circulated between lines based on demand, using heat exchangers and buffer tanks to optimize energy transfer and storage, allowing for continuous high-performance operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single pasteurization line with heat pump is used, then energy efficiency is improved, but the system cannot adapt to varying operation conditions and maintain high COP under all conditions
Solution Approach 1:
The pasteurization system is divided into multiple independent pasteurization lines (first pasteurization line, second pasteurization line), each capable of independent operation. This segmentation allows the heat pump to serve multiple lines simultaneously or individually, enabling better adaptation to varying operational demands while maintaining high energy efficiency through optimized thermal energy distribution across the divided system.
2Adaptability or versatility
If multiple pasteurization lines are added to handle varying demand, then adaptability is improved, but system complexity increases
Solution Approach 1:
Multiple pasteurization lines are merged into a single integrated system sharing common heat pump, heat exchangers, and buffer tanks. This merging approach provides adaptability to handle varying operational demands across different lines while avoiding the complexity of completely independent systems, as the shared thermal energy infrastructure coordinates temperature control across all lines through centralized heat management.
Solution Approach 2:
The heat pump system is designed with universal functionality to serve multiple pasteurization lines simultaneously or individually. The heat exchangers and buffer tanks are configured to handle thermal energy requirements from any combination of lines, making the system multi-functional and adaptable to various operational scenarios without requiring line-specific dedicated equipment.
3Productivity
If heat pump operates continuously at high capacity, then productivity is improved, but energy efficiency decreases when demand is low
Solution Approach 1:
The heat pump system incorporates dynamic operation modes that can adjust capacity based on actual thermal demand. The system can operate in different configurations: serving multiple lines simultaneously at reduced capacity, serving individual lines at variable capacities, or storing thermal energy in buffer tanks during peak production periods. This dynamic adaptability maintains productivity while optimizing energy efficiency by matching heat pump output to actual demand conditions.
Solution Approach 2:
The buffer tanks are used to store pre-heated or pre-cooled process liquid in advance, allowing the heat pump to operate efficiently during periods of high demand while preparing thermal energy ahead of time. This preliminary action enables the system to maintain high productivity during peak operations without requiring the heat pump to run at maximum capacity continuously, thereby preserving energy efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances energy efficiency by matching thermal energy supply with demand across pasteurization lines, maximizing the coefficient of performance (COP) of the heat pump and reducing the need for less efficient heating and cooling means.
Implementation Method 1
a heating liquid is heated by means of a heating means of a heat pump
Implementation Method 2
a cooling liquid is cooled by means of a cooling means of the heat pump
Implementation Method 3
the heated heating liquid from the heating means of the heat pump is used to heat process liquid with a high temperature level of the first pasteurizing line by means of a first heating heat exchanger
Implementation Method 4
the cooled cooling liquid from the cooling means of the heat pump is used to cool process liquid with a low temperature level of the first pasteurizing line by means of a first cooling heat exchanger
Data Source
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AI summary
The invention relates to a pasteurizing plant and a method for operating a pasteurizing plant. The pasteurizing plant comprises at least two pasteurizing lines. A heating means of a heat pump is used to heat a heating liquid, and a cooling means of the heat pump is used to cool a cooling liquid. Based on heating and/or cooling demand in the pasteurizing lines, the heated heating liquid and/or the cooled cooling liquid each are used to heat respectively cool process liquid of the pasteurizing lines.