Drying Ventilation Box Power Management
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Solution Overview
Problem
Drying hay efficiently while minimizing energy consumption and reducing energy peaks, which are typically high due to the need for heating and dehumidifying air used in the process.
Innovation Solution
Regulating the output of a controllable fan and air dehumidifier using frequency converters to maintain a total power value, adjusting air flow and temperature within the ventilation box by minimizing air intake and maximizing dehumidifier output, and switching between internal and external air sources based on temperature differences to optimize energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air is heated to increase drying efficiency and dehumidified air volume is increased, then drying effectiveness is improved, but energy consumption increases significantly
Solution Approach 1:
The system dynamically adjusts operational parameters (air temperature, air volume, dehumidifier power) based on real-time monitoring of hay moisture content and environmental conditions. By changing parameters adaptively rather than operating at fixed high levels, the system maintains effective drying while reducing overall energy consumption.
Solution Approach 2:
The dehumidifier's compressor waste heat is automatically utilized to preheat the intake air through a heat exchanger. This self-service approach recovers energy that would otherwise be wasted, reducing the additional heating energy required and lowering total energy consumption while maintaining drying effectiveness.
2Productivity
If air is heated to suitable temperature for drying, then drying efficiency increases, but energy consumption peaks occur
Solution Approach 1:
The system performs preliminary heating of intake air using the dehumidifier compressor's waste heat before the air enters the drying chamber. This preheating action reduces the temperature rise required from additional heating sources, smoothing out energy consumption peaks and maintaining steady operational power levels.
Solution Approach 2:
The system converts the harmful waste heat from the dehumidifier compressor into a beneficial resource by using it to preheat the intake air. This transforms energy that would otherwise be wasted into useful thermal energy, reducing the need for additional heating power and eliminating consumption peaks.
3Productivity
If dehumidifier power is increased to provide sufficient dehumidified air volume, then drying capacity is improved, but total power consumption exceeds available supply
Solution Approach 1:
The system dynamically adjusts the dehumidifier power level based on real-time conditions including hay moisture content, ambient temperature, and available power supply capacity. By optimizing the dehumidifier power parameter adaptively rather than operating at maximum capacity, the system maintains adequate drying capacity while ensuring total power consumption remains within supply limits.
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 reduces overall energy consumption and minimizes energy peaks by dynamically controlling fan and dehumidifier outputs, allowing for efficient drying with reduced operational costs.
Implementation Method 1
air is drawn in by means of at least one controllable fan and at least partially supplied to a controllable dehumidifier
Implementation Method 2
air is drawn in by means of at least one controllable fan and at least partially supplied to a controllable dehumidifier in which the air is dehumidified
Implementation Method 3
the air, after having passed through an evaporator of the dehumidifier, is heated by means of a condenser of the dehumidifier
Data Source
Figure 1~2
AI summary
Method for drying material in a ventilation box (2). In order to enable optimized energy consumption that is low and has as few peaks as possible, the invention provides that the method, at least in an initial phase, comprises the following steps: - Reducing the amount of air drawn in to a minimum value by controlling the power of at least one fan (4) to a minimum power value; - Controlling the power of a dehumidifier (5) to a maximum power value, wherein the sum of the minimum power value and the maximum power value is less than or equal to a defined total power value;- Controlling the power of the dehumidifier (5) to a value less than the maximum power value and controlling the power of the at least one fan (4) to a value greater than the minimum power value in order to increase the intake air volume to a setpoint as soon as the internal temperature of the air in the ventilation box (2) exceeds a predetermined value, wherein the sum of the powers of the dehumidifier (5) and the at least one fan (4) is less than or equal to the total power value.;