Plate Heat Exchanger with Elongated Water Flow Path
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional plate type heat exchangers have inefficient heat exchange with exhaust gases due to short circulating water flow paths and inadequate water supply near the burner, leading to insufficient heat retrieval.
Innovation Solution
A high-efficiency plate type heat exchanger with stacked unit fluidized beds connected in up and down directions to elongate the circulating water flow path to at least two passes and includes a baffle plate with distribution holes to enhance heat transfer, increasing the water flow near the burner and effectively using heat transfer areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If circulating water paths of layers are independent and water flows in one direction only, then the structure is simple, but the flow path is short and heat exchange is insufficient
Solution Approach 1:
The patent merges the circulating water paths of different layers by connecting them in series through the stacked plate structure. Water flows from the water inlet through multiple layers sequentially and exits through the water outlet, creating a continuous elongated flow path that increases heat exchange efficiency while maintaining structural simplicity through the modular stacked design
2Device complexity
If a large amount of circulating water is supplied to the lowest layer far from the burner, then the water supply system is simple, but the highest layer close to the burner receives insufficient water for effective heat exchange
Solution Approach 1:
The patent applies local quality by configuring the water inlet to supply circulating water preferentially to the highest layer close to the burner, where the exhaust gas temperature is highest and heat exchange potential is greatest. This localized optimization ensures effective heat retrieval at the most critical location while the stacked plate structure naturally distributes water to other layers
3Ease of operation
If exhaust gas communication holes are large and dispersed, then exhaust gas flows easily through the plates, but heat exchange time with circulating water is insufficient
Solution Approach 1:
The patent extends the heat exchange process from a single pass through the plates to a multi-dimensional continuous flow path. By connecting circulating water paths across multiple layers in series, water flows through each layer sequentially, increasing the total residence time and distance for heat exchange between the circulating water and exhaust gas while maintaining adequate flow through the communication holes
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 solution significantly improves heat exchange efficiency by elongating the circulating water flow path and increasing the water flow near the burner, allowing for more effective heat retrieval from exhaust gases while optimizing the heat transfer area.
Implementation Method 1
circulating water exchanges heat with the exhaust gas while flowing along a path between the upwardly bent plate 110 and the downwardly bent plate 120
Implementation Method 2
a heat exchanger is an apparatus which transfers heat by intersecting a heating fluid and a fluid to be heated which have different temperatures
Implementation Method 3
inserting a baffle plate having distribution holes between unit fluidized beds, absorbing heat of an exhaust gas
Data Source
AI summary
A high-efficiency plate type heat exchanger increases a heat-exchanging efficiency with an exhaust gas by connecting unit fluidized beds formed with stacked heat exchanging plates to each other in up and down directions, and elongating a flow path of circulating water to be greater than or equal to two passes (2-PASS). The heat exchanger retrieves heat of an exhaust gas by increasing a flow amount of circulating water of a portion close to a burner while a circulation path is elongated as described above. In addition, the high-efficiency plate type heat exchanger increases efficiency thereof by inserting a baffle plate having distribution holes between unit fluidized beds, controlling a flow of an exhaust gas while reducing an exhaust speed of the exhaust gas using heat exchanging fins of the baffle plate, absorbing heat of the exhaust gas, and effectively using a heat transfer area.