Flue Gas Chimney With Nested PVDF Pipes For Condensing Heater Modernization
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Solution Overview
Problem
Existing exhaust chimneys for heating systems are not adaptable for modernization, particularly when replacing conventional heating devices with low-temperature or condensation heaters, as they require structural changes and additional stainless steel pipes, which are costly and often not feasible due to building laws and aesthetic concerns.
Innovation Solution
A flue gas chimney design with adjustable receiving elements and flexible additional chimney pipes made of PVDF, allowing for optimal use of the available opening cross-section, with temperature regulation using secondary air to prevent overheating, and the use of plastic or steel materials for durability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional heating devices are replaced with low-temperature or condensation heaters, then energy efficiency is improved, but the existing exhaust chimney cannot be used and structural changes are required
Solution Approach 1:
The solution segments the exhaust system into two separate pathways: the existing exhaust chimney continues to serve conventional heating devices, while new low-temperature heaters connect through additional chimney pipes that run independently through receiving elements in the exhaust chimney wall. This segmentation allows both heating system types to coexist without requiring structural changes to the original exhaust chimney.
Solution Approach 2:
The additional chimney pipes are nested within the structure of the existing exhaust chimney by passing them through receiving elements embedded in the chimney wall. The receiving elements contain passage openings that guide the additional pipes through the chimney structure, allowing the new pipes to be integrated into the existing system without disrupting its integrity.
2Adaptability or versatility
If additional stainless steel pipes are routed on the outside of the building for each modernized residential unit, then individual modernization is enabled, but construction costs and work complexity increase significantly
Solution Approach 1:
The solution merges the exhaust pathways for both conventional and modern heating systems into a single integrated structure. The additional chimney pipes for low-temperature heaters are combined with the existing exhaust chimney by passing them through receiving elements in the chimney wall, allowing both exhaust streams to be handled by one unified system rather than requiring separate external piping for each residential unit.
Solution Approach 2:
The receiving elements in the exhaust chimney wall serve multiple functions: they provide passage openings for additional chimney pipes, maintain the structural integrity of the exhaust chimney, and enable both conventional and low-temperature heating systems to share the same exhaust infrastructure. This multi-functionality eliminates the need for separate external piping solutions.
3Adaptability or versatility
If additional chimney pipes are arranged in the exhaust gas shaft with receiving elements having passage openings, then individual heating system modernization is enabled, but the arrangement must optimize the available opening cross-section
Solution Approach 1:
The receiving elements are positioned at specific locations in the exhaust chimney wall with passage openings sized and shaped to match the requirements of individual additional chimney pipes. Each receiving element is locally optimized to accommodate its specific pipe while minimizing the space required in the exhaust chimney cross-section, allowing efficient use of the available area.
Solution Approach 2:
The arrangement allows for dynamic configuration where receiving elements can be added or positioned at different heights along the exhaust chimney to accommodate modernization of different residential units in any order. The system can adapt to various combinations and sequences of modernization projects without requiring a fixed, predetermined layout.
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
Enables seamless modernization of individual heating systems without structural changes, reducing costs and ensuring compatibility with both conventional and modern heating systems, while maintaining the durability and safety of the chimney infrastructure.
Implementation Method 1
The exhaust gas generated by the heating system is fed into the exhaust duct via the outlet and discharged to the environment via the upper end
Implementation Method 2
this tough, UV-resistant and high-temperature-resistant material not only being suitable for relatively high exhaust gas temperatures, but also having a high level of resistance, particularly to aggressive substances occurring in condensation or wet chimneys has condensate
Implementation Method 3
temperature regulation using secondary air to prevent overheating
Data Source
Figure 1
Figure 2~3
AI summary
The chimney (1) has an exhaust duct (25) running over multiple floors (11-17) of a residential building (10). The duct comprises a lower end (28) and an upper end (27) that is arranged on a roof of the building. A connection point (22) connects the duct with an outlet of heating installations (19, 20) i.e. low-temperature and/or condensation heaters. Exhaust gas produced by the outlet is lead into the duct and transferred to environment through the duct upper end. An additional chimney pipe (35) is arranged in the duct and projects from the connection point into area of the duct upper end.