Heat exchanger radiator, ventilation arrangement of building, and method for using ventilation arrangement of building
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Solution Overview
Problem
Ventilation systems in large public buildings face efficiency decreases when occupancy is low, as reducing blower speeds halves the amount of replacement air, leading to increased energy consumption and reduced heat energy recovery.
Innovation Solution
Adjusting the surface area of heat exchanger radiators and the amount of heat transfer liquid in response to changes in air replacement, while maintaining the flow rate of the heat transfer liquid, to optimize heat exchange efficiency across different usage situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the blower rotation speed is reduced to halve the ventilation amount, then the energy consumption of blowers is reduced, but the heat exchange efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the heat exchanger surface area adjustable rather than fixed. The system dynamically adapts the active heat exchange surface to match the reduced air flow conditions, ensuring efficient heat transfer even at lower ventilation rates. This resolves the contradiction by allowing the heat exchanger to maintain effectiveness across varying operational conditions.
Solution Approach 2:
The patent changes the parameter of heat exchanger surface area in response to changing ventilation requirements. When air replacement amount decreases, the system adjusts the active surface area downward proportionally, maintaining optimal heat exchange efficiency. This parameter adaptation resolves the contradiction between reduced ventilation and maintained heat recovery efficiency.
2Productivity
If only the air replacement amount is changed, then the ventilation efficiency adapts to occupancy, but the heat exchange efficiency deteriorates
Solution Approach 1:
The system dynamically couples the heat exchanger surface area adjustment with the air replacement amount adjustment. Both parameters change together in proportion, maintaining the optimal relationship between air flow and heat exchange surface. This dynamic coordination ensures that ventilation efficiency adapts to occupancy while heat exchange efficiency is preserved.
Solution Approach 2:
The patent implements coordinated parameter changes by simultaneously adjusting the active heat exchanger surface area and the air replacement amount. When occupancy decreases, both parameters are reduced proportionally, maintaining the optimal heat exchange to air flow ratio. This resolves the contradiction by ensuring heat exchange efficiency deteriorates no more than necessary when adapting ventilation to lower occupancy.
3Loss of energy
If the heat exchanger surface area is reduced to match reduced air volume, then the heat exchange efficiency is maintained, but the system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the heat exchanger into multiple independent sections or zones that can be individually activated or deactivated. This allows the active heat exchange surface area to be adjusted in discrete steps matching different ventilation requirements. The segmentation approach maintains heat exchange efficiency while managing system complexity through modular design.
Solution Approach 2:
The system implements dynamic surface area adjustment through mechanisms such as variable geometry heat exchanger sections, movable partitions, or selectively activatable zones. This dynamic capability allows the heat exchanger to adapt its effective surface area to match the current air replacement rate, maintaining efficiency without requiring a completely redesigned static system.
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 maintains high heat exchange efficiency and reduces energy consumption by matching the heat exchanger's surface area and liquid flow to the reduced air volume, improving heat recovery efficiency by up to 40% and lowering operational costs.
Implementation Method 1
heat exchanger radiator of supply air to heat/cool supply air, and at least one heat exchanger radiator of exhaust air to heat/cool exhaust air
Implementation Method 2
heat exchange in relation to a change in the amount of air replaced in the building
Implementation Method 3
heat exchanger circuit based on the circulation of heat transfer liquid to conduct heating/cooling to the heat exchanger radiator
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
A ventilation arrangement (1) of a building, having at least one supply air channel (2) that has at least one heat exchanger radiator (4) of supply air, and at least one exhaust air channel (5), which has at least one heat exchanger radiator (7) of exhaust air, at least one heat exchanger circuit (8) based on the circulation of heat transfer liquid to conduct heating/cooling to the heat exchanger radiators of the supply air channel and exhaust air channel, and a control unit (20) to change the amount of air to be replaced in the building by changing the amount of air brought in the building through the supply air channel and by changing in the corresponding proportion the amount of exhaust air removed through the exhaust air channel. The control unit (20) is adapted to change the surface area of said supply air and exhaust air heat exchanger radiators (4, 7), which takes part in the heat exchange, in relation to a change in the amount of air replaced in the building, and the amount of heat transfer liquid fed to said supply air and exhaust air radiator (4, 7), in relation to the change in the amount of air replaced in the building without substantially changing the rate of flow of the heat transfer liquid in the heat exchanger radiators (4, 7). Additionally, a method of using the ventilation arrangement of a building, and liquid-gas heat exchanger radiator.