Graphene Sensor Board Heat Transfer to Prevent VOC Condensation
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Solution Overview
Problem
Existing gas sample evaluation systems face challenges in accurately detecting volatile organic compounds (VOCs) due to condensation on graphene sensors, which inhibits their functionality, and require significant power consumption for heating to prevent condensation.
Innovation Solution
A gas sample evaluation system with a housing design that directs the gas flow across a circuit board, incorporating thermal conductors to transfer heat from one side to the other, minimizing condensation and reducing power needs by utilizing heat from the gas sample, and potentially powered heat sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating is applied to prevent condensation on graphene sensors, then sensor functionality is maintained, but power consumption increases significantly
Solution Approach 1:
The system uses the thermal energy already present in the incoming gas sample to warm the sensor board through thermal conductors, eliminating the need for external heating power sources. The gas sample essentially heats itself as it flows through the system, with thermal conductors directing this heat to the graphene sensors.
Solution Approach 2:
Thermal conductors serve as intermediaries to transfer heat from the gas sample to the sensor board. These conductors enable passive heat transfer without requiring active heating elements, reducing power consumption while maintaining sensor temperature above dew point.
2Reliability
If thermal conductors are added to transfer heat to graphene sensors, then condensation is prevented, but device complexity increases
Solution Approach 1:
The thermal conductors are integrated directly into the sensor board structure, merging the heat transfer function with the existing sensor mounting platform. This integration minimizes additional components and simplifies the overall system architecture while achieving effective heat transfer.
3Temperature
If the flow path is designed to be circuitous, then heat transfer efficiency improves, but the device volume increases
Solution Approach 1:
The circuitous flow path is implemented locally around the sensor board area where heat transfer is most needed, rather than making the entire flow path complex. This localized approach maximizes heat transfer efficiency at the critical sensor interface while minimizing the overall volume increase.
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 system effectively prevents condensation on graphene sensors while reducing power requirements, enhancing portability and accuracy in VOC detection.
Implementation Method 1
The one or more thermal conductors can convey heat absorbed from an incoming gas sample from the first side to the second side of the sensor board and to the plurality of graphene sensors
Data Source
AI summary
Embodiments herein relate to systems and devices for evaluating gas samples. In an embodiment, a measurement system for gas samples is included having a housing with an inflow port, an outflow port, and a sensor board disposed within the housing. The sensor board can include a first side, a second side, and one or more thermal conductors, wherein the one or more thermal conductors pass from the first side to the second side of the sensor board. A flow path can extend from the inflow port to the outflow port. A plurality of graphene sensors can be disposed on the second side. The one or more thermal conductors can convey heat absorbed from an incoming gas sample from the first side to the second side of the sensor board and to the plurality of graphene sensors. Other embodiments are also included herein.