Tempering Jacket Control for Large-Tank Liquid Temperature Stability
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Solution Overview
Problem
Existing liquid treatment devices are energy-intensive and sluggish due to continuous tempering fluid circulation, leading to excessive tempering and potential freezing issues in large-volume tanks used for biological processes.
Innovation Solution
A liquid treatment device with a closed-loop control system that includes a primary and secondary loop of closed-loop controllers, temperature sensors, and a control valve to precisely control the temperature of the liquid in the tank by adjusting the tempering fluid's temperature in the tempering jacket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If tempering fluid circulates continuously through the fluid circuit, then the liquid in the tank can be tempered, but the energy consumption becomes very high
Solution Approach 1:
The system uses periodic action by implementing a control method that activates the tempering fluid circulation only when temperature adjustment is needed, rather than continuous circulation. The control unit monitors the liquid temperature and activates the circulator pump selectively to add or remove heat as required, significantly reducing energy consumption while maintaining effective temperature control.
2Temperature
If tempering fluid circulates continuously, then the liquid temperature can be maintained, but the system becomes sluggish and excessive tempering occurs
Solution Approach 1:
The system implements feedback control by using a temperature sensor to continuously monitor the liquid temperature in the tank and feeding this information back to the control unit. The control unit compares the actual temperature with the desired temperature and adjusts the tempering fluid circulation accordingly, enabling rapid response to temperature changes and preventing excessive tempering.
Solution Approach 2:
The system applies dynamics by making the tempering fluid circulation variable and adaptive rather than static and continuous. The control unit dynamically adjusts the circulation rate and duration based on real-time temperature conditions, allowing the system to respond quickly to temperature changes while maintaining stability when the desired temperature is achieved.
3Quantity of substance
If the liquid volume in the tank is large, then the tank can handle large-scale biological processes, but the system response to temperature changes becomes slow
Solution Approach 1:
The system applies segmentation by dividing the tempering process into discrete, controllable stages. Instead of attempting to temper the entire large volume simultaneously through continuous circulation, the control unit manages the tempering process in controlled intervals, activating the circulator pump only when and where temperature adjustment is needed, thereby improving response speed while handling large liquid volumes.
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
The closed-loop control system allows for precise and efficient temperature control of the liquid, reducing energy consumption, preventing excessive tempering, and minimizing the risk of freezing in the fluid circuit components.
Implementation Method 1
a tempering jacket which surrounds the tank and is arranged in a fluid circuit in which a tempering fluid circulates, and via which the liquid in the tank is tempered
Implementation Method 2
a first temperature sensor which measures the actual temperature of the liquid received in the tank, and a second temperature sensor which measures the actual temperature of the tempering fluid
Data Source
AI summary
A liquid treatment device including a tank for receiving and further processing liquid by means of biological and/or chemical processes taking place in the liquid, a tempering jacket which surrounds the tank and is arranged in a fluid circuit in which a tempering fluid circulates, and via which the liquid in the tank is tempered to control biological processes in the liquid, a control valve which is located in the fluid circuit and via which the liquid flow in the tempering jacket can be closed-loop controlled to adjust the temperature of the liquid in the tank, a first temperature sensor which measures the actual temperature of the liquid received in the tank, a second temperature sensor which measures the actual temperature of the tempering fluid present in the tempering jacket, and an electronic closed-loop control unit for the closed-loop control of a temperature of the tempering fluid present in the tempering jacket. The closed-loop control unit includes a primary loop of closed-loop controlling and a secondary loop of closed-loop controlling, a first electronic closed-loop controller being included in the primary loop of closed-loop controlling and a second electronic closed-loop controller being included in the secondary loop of closed-loop controlling.