Fuel Cell Air Conditioning Module With Bypass Humidity Mixing
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Solution Overview
Problem
Conventional air supply systems for fuel cell systems in railway vehicles are cumbersome, with significant pressure losses and pressure drops due to complex piping arrangements, and fail to efficiently regulate temperature and humidity, while also not meeting fire safety standards due to flammable materials.
Innovation Solution
A compact power supply and air conditioning module with a metallic external envelope, featuring an air circuit with a heat exchanger, humidifier, distribution, and mixing spaces, along with a bypass branch and flow control valves, optimized for efficient air flow regulation and reduced pressure losses, and constructed from fire-resistant materials like stainless steel or aluminum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional air supply systems are used with complex piping arrangements, then the system can provide air flow to fuel cells, but significant pressure losses and pressure drops occur
Solution Approach 1:
The patent integrates the heat exchanger, humidifier, distribution space, and mixing space into a single unified module with a compact internal air circuit. This merging of previously separate components eliminates complex external piping arrangements and reduces pressure losses while maintaining reliable air flow to fuel cells.
Solution Approach 2:
The air circuit is nested within the module housing, with the heat exchanger, humidifier, distribution space, and mixing space arranged in a compact nested configuration. This nesting eliminates the need for extensive external piping and reduces pressure drops associated with complex routing.
2Reliability
If conventional air supply systems are used, then air can be supplied to fuel cells, but temperature and humidity regulation is inefficient
Solution Approach 1:
The air circuit performs preliminary conditioning by cooling the air in the heat exchanger and humidifying it in the humidifier before the air reaches the fuel cells. This preliminary action ensures optimal temperature and humidity levels for maximum fuel cell efficiency and productivity.
Solution Approach 2:
The module incorporates sensors that monitor temperature, pressure, and relative humidity, with electronic interfaces that regulate the air conditioning processes. This feedback mechanism ensures precise temperature and humidity control to optimize fuel cell performance.
3Reliability
If conventional equipment is used in railway vehicles, then air supply functions can be provided, but fire safety standards are not met due to flammable materials
Solution Approach 1:
The module is constructed with a metallic housing and uses metal components for the heat exchanger, humidifier, and air circuit elements. These metallic (inert) materials replace flammable materials, creating a fire-resistant environment that meets railway vehicle safety standards while maintaining all air supply functions.
4Volume of moving object
If a compact module design is implemented, then installation space is reduced, but the integration of multiple functions (heat exchange, humidification, distribution, mixing) becomes more challenging
Solution Approach 1:
The patent combines the heat exchanger, humidifier, distribution space, and mixing space into a single integrated module. This merging allows multiple functions to be performed within a compact volume while managing integration complexity through unified design and internal air circuit routing.
Solution Approach 2:
The components are arranged in a nested configuration where the air circuit flows sequentially through the heat exchanger, humidifier, distribution space, and mixing space within the compact module housing. This nesting achieves space efficiency while organizing the complexity of multiple functions in a structured manner.
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 module enhances fuel cell efficiency and lifespan by optimizing air temperature and humidity control, minimizes pressure losses, and meets fire safety standards by reducing flammable materials, resulting in a more reliable and compact air conditioning system for railway vehicles.
Implementation Method 1
a heat exchanger, an air humidifier, a distribution space and a mixing space, arranged on the air circuit and received in the external casing
Implementation Method 2
the air humidifier comprising a main air path, arranged between the distribution and mixing spaces on the air circuit
Data Source
Figure 1
Figure 2
AI summary
The invention relates to an air supply and conditioning module (40) for a vehicle fuel cell system (24), said module comprising: - an air inlet (60) and an air outlet (62), provided on an outer casing; - an air circuit (46) received in the outer casing and opening onto the inlet and outlet; and - a heat exchanger (48), an air humidifier (50), a distribution space (52) and a mixing space (54), arranged on the air circuit; the humidifier being arranged between the distribution and mixing spaces; the outlet (62) being arranged downstream of the mixing space; the air circuit comprising a bypass branch (71), connecting the distribution and mixing spaces away from the humidifier and comprising a regulating valve (72).