Nested-Pipe Radiator Design for Engine Fluid Heating Efficiency
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Solution Overview
Problem
Conventional fluid heating devices for engines have limited heat radiation areas and long heat transfer distances, resulting in low heating efficiency due to the use of a single radiator pipe with heat being radiated only from the inner peripheral face, leading to inefficient fluid heating.
Innovation Solution
A fluid heating device comprising a holder, a heater, and a radiator pipe formed by an outer and inner pipe, where heat is transferred between the outer and inner pipes to radiate heat efficiently to fluid passing through both pipes, increasing the heat radiation area and reducing the distance for heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radiator pipe is used, then the device structure is simple, but the heat radiation area is limited and heating efficiency is low
Solution Approach 1:
The single radiator pipe is segmented into an outer pipe and an inner pipe, creating a multi-pipe structure. This segmentation increases the heat radiation area by providing multiple surfaces (outer surface of outer pipe, inner and outer surfaces of inner pipe) for heat transfer to the fluid, while maintaining relatively simple device structure through the nested configuration of the pipes.
2Device complexity
If a single radiator pipe is used, then the device structure is simple, but the heat transfer distance is long
Solution Approach 1:
By dividing the single pipe into outer and inner pipes, the heat transfer path is segmented. The inner pipe provides a direct heat transfer path from the heater to the fluid in its interior, while the outer pipe simultaneously heats the fluid in the annular space between the pipes. This segmentation creates multiple shorter heat transfer distances compared to a single long pipe.
Solution Approach 2:
The inner pipe is nested within the outer pipe, creating a concentric configuration where the heater is positioned inside the inner pipe. This nesting arrangement allows heat to be transferred from the heater through the inner pipe wall to the fluid inside, and simultaneously through the outer pipe wall to the fluid in the annular space, effectively reducing the maximum heat transfer distance from the heater center to any fluid element.
3Device complexity
If a single radiator pipe is used, then the device structure is simple, but the heating efficiency is low
Solution Approach 1:
The segmentation of the radiator pipe into outer and inner pipes creates multiple heat radiation surfaces that simultaneously heat different portions of the fluid. This increases the overall heat transfer rate and heating efficiency while maintaining a relatively simple device structure through the straightforward nested pipe configuration.
Solution Approach 2:
The single pipe structure is transformed into a three-dimensional nested pipe configuration. The inner pipe is positioned concentrically within the outer pipe, creating radial and axial heat transfer paths. This dimensional change from a single linear pipe to a nested tubular structure increases the effective heat radiation area and improves heating efficiency by utilizing multiple spatial dimensions for heat transfer.
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 configuration enhances fluid heating efficiency by providing a larger heat radiation area and shorter heat transfer distance, effectively increasing the overall heating performance.
Implementation Method 1
heat of the heater is radiated to fluid passing through the radiator pipe via the radiator pipe
Implementation Method 2
the heat generated by the heater is transferred to the outer pipe and the inner pipe
Data Source
AI summary
There is provided a fluid heating device for an engine with increased heating efficiency of fluid. The fluid heating device for an engine includes: a holder; a heater; and a radiator pipe, the radiator pipe is inserted into the holder, the heater is housed in the holder, heat of the heater is radiated to fluid passing through the radiator pipe via the radiator pipe. The radiator pipe is formed by an outer pipe and an inner pipe in the outer pipe, the heat generated by the heater is transferred to the outer pipe and the inner pipe, the fluid passing inside and outside the inner pipe in the outer pipe is heated by heat radiation from the outer pipe and the inner pipe.