A mobile carrier in-situ hydrogen production module tail gas waste heat coupled constant temperature control system

Abstract

The application discloses a mobile carrier in-situ hydrogen production module tail gas waste heat coupled constant temperature control system, and belongs to the technical field of vehicle-mounted / mining alcohol hydrogen production thermal management. The system comprises a tail gas waste heat collection and heat exchange loop, a heat storage buffer cavity, a staged heat tracing unit, a working condition prediction controller, a flow distribution three-way valve and a low-temperature preheating branch. The system collects the waste heat of the power tail gas of a loader and a low-altitude aircraft, and the heat storage cavity stabilizes the waste heat fluctuation. The working condition prediction controller dynamically adjusts the three-way valve to distribute the waste heat flow according to the driving height and the mine operation working condition prediction, and the staged heat tracing unit is started to supplement heat during the low-temperature period. The low-temperature preheating branch is started in advance during the transfer driving stage. The waste heat is used to reduce the power consumption of the electric heat tracing, the problem of the attenuation of the reforming efficiency in the high-altitude and mine low-temperature environment is solved, the reaction temperature of the hydrogen production module is stabilized, various mobile alcohol hydrogen power carriers are adapted, the fuel and electric energy consumption of the whole machine is reduced, and the service life of the catalyst is prolonged.

Description

Technical Field

[0002] This invention belongs to the technical field of mobile carrier methanol in-situ hydrogen production thermal management equipment, specifically relating to a mobile carrier in-situ hydrogen production module exhaust gas waste heat coupling constant temperature control system, applicable to all methanol-hydrogen mobile power equipment such as unmanned mining loaders, low-altitude tiltrotor aircraft, and mining trucks. Background Technology

[0003] Existing temperature control solutions for vehicle-mounted and mining methanol reforming hydrogen production modules mostly rely on constant-power electric heating to maintain the reaction temperature. However, ambient temperatures are extremely low at night in high-altitude and open-pit mines, resulting in high power consumption for electric heating and increased overall machine load. While exhaust gas carries a significant amount of recoverable waste heat, its temperature fluctuates drastically with the load. Directly introducing this gas into the reforming chamber can cause sudden temperature fluctuations in the reactor, subjecting the catalyst to frequent thermal shocks. Furthermore, existing temperature control systems cannot predict low-temperature conditions in advance based on the vehicle's travel route and operating time. The equipment takes a long time to warm up after arriving at the work site, reducing continuous operation efficiency. The lack of an integrated temperature control architecture combining waste heat buffering, condition prediction, and staged heating makes it difficult to balance energy consumption and hydrogen production stability. Summary of the Invention

[0004] Purpose of the invention Overcoming the shortcomings of existing hydrogen production modules, such as high power consumption for temperature control, large temperature fluctuations, and slow temperature rise at low temperatures, this invention provides a tail gas waste heat coupled constant temperature control system. This system recovers power waste heat, predicts low-temperature operating conditions, and adjusts heating power in stages to stabilize the reforming reaction temperature, reduce energy consumption, and extend catalyst life. Technical solution

[0005] A waste heat coupling constant temperature control system for a mobile carrier in-situ hydrogen production module includes a waste heat collection and heat exchange circuit, a heat storage buffer chamber, a staged heat tracing unit, a condition prediction controller, a flow distribution three-way valve, and a low-temperature preheating branch. The waste heat collection and heat exchange circuit is connected to the power exhaust gas pipeline to recover heat, and the heat storage buffer chamber buffers waste heat to smooth temperature fluctuations. The flow distribution three-way valve distributes waste heat to the reforming chamber or the heat dissipation bypass. The condition prediction controller collects ambient temperature, carrier positioning, and operation scheduling data, predicts low-temperature risks, and controls the opening degree of the three-way valve and the staged heat tracing power. When the vehicle is being moved to another location, the low-temperature preheating branch is activated to preheat the module in advance. Beneficial effects

[0006] 1. Recovering waste heat from exhaust gas replaces most of the electric heating power, reducing the electrical energy and methanol consumption of mobile carriers; 2. The heat storage chamber buffers the temperature fluctuations of the exhaust gas and eliminates the impact of alternating hot and cold temperatures on the catalyst; 3. By leveraging positioning and scheduling information for preheating, equipment can be put into full-load hydrogen production as soon as it is in place, thus improving operational efficiency; 4. Multi-level graded heating ensures the minimum working temperature for remodeling in extreme low-temperature environments, suitable for mining, high-altitude and low-temperature scenarios. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall architecture of the system; Attached diagram labels: 1-Exhaust gas waste heat collection and heat exchange circuit, 2-Heat storage buffer chamber, 3-Flow distribution three-way valve, 4-Stage heat tracing unit, 5-Low temperature preheating branch, 6-Operating condition prediction controller. Detailed Implementation

[0008] The exhaust gas waste heat collection and heat exchange circuit adopts a shell-and-tube heat exchanger. The outer layer carries high-temperature exhaust gas, while the inner layer carries a heat-conducting medium and connects to a heat storage buffer chamber. The chamber is filled with paraffin phase change heat storage material. The flow distribution three-way valve is an electrically controlled three-way reversing valve, with one end connected to the heat storage chamber, one end connected to the hydrogen production reforming jacket heat exchange pipeline, and the other end connected to the external heat dissipation bypass of the fuselage. The graded heat tracing unit consists of low, medium, and high-grade electric heat tracing wires, laid in the insulation jacket of the reforming module. The operating condition prediction controller is connected to the vehicle positioning module, ambient temperature sensor, and mine / aircraft dispatch communication unit to obtain real-time altitude, on-site temperature, and estimated standby time. When it is predicted that the area will enter a low-temperature region, the low-temperature preheating branch is activated for low-power preheating during the transfer and driving phase. During normal operation, waste heat is used first, and heat tracing is activated in stages when the ambient temperature is below the threshold. In high-temperature operating conditions, the three-way valve switches to the bypass to release excess heat. The entire system's signal interface is compatible with the vehicle's CAN bus for mobile alcohol-hydrogen equipment, and can be directly integrated with the in-situ hydrogen production module.

Claims

1. A waste heat coupling constant temperature control system for exhaust gas from a mobile carrier in-situ hydrogen production module, characterized in that, It includes a waste heat collection and heat exchange circuit for exhaust gas, a heat storage buffer chamber, a staged heat tracing unit, a working condition prediction controller, a flow distribution three-way valve, and a low-temperature preheating branch. The exhaust gas waste heat collection and heat exchange circuit is connected to the power exhaust gas pipeline of the mobile carrier for recovering exhaust gas waste heat. The heat storage buffer cavity is connected to the exhaust gas waste heat collection and heat exchange circuit to balance the waste heat temperature fluctuation. The input end of the flow distribution three-way valve is connected to the heat storage buffer cavity, and the two outputs are respectively connected to the heat exchange cavity of the hydrogen production module and the bypass heat dissipation pipeline. The graded heat tracing unit is arranged in the interlayer of the hydrogen production module to provide multi-level auxiliary heating. The low-temperature preheating branch is controlled by the working condition prediction controller and is used to preheat the module in advance during the transfer. The operating condition prediction controller is connected to the exhaust gas temperature sensor, the carrier positioning module, and the ambient temperature acquisition unit, and outputs valve control and heat tracing adjustment commands.

2. The mobile carrier in-situ hydrogen production module tail gas waste heat coupling constant temperature control system according to claim 1, characterized in that, The heat storage buffer chamber is filled with a phase change heat storage medium, which retains residual heat during short-term shutdowns.

3. The mobile carrier in-situ hydrogen production module tail gas waste heat coupling constant temperature control system according to claim 1, characterized in that, The working condition prediction controller divides the low temperature risk threshold into three levels based on the positioning height and the standby time in the mining area.

4. The mobile carrier in-situ hydrogen production module tail gas waste heat coupling constant temperature control system according to claim 1, characterized in that, The flow distribution three-way valve increases the bypass heat dissipation flow under high temperature conditions and closes the bypass under low temperature conditions, so that all the waste heat is supplied to the reforming module.

5. The mobile carrier in-situ hydrogen production module tail gas waste heat coupling constant temperature control system according to claim 1, characterized in that, The low-temperature preheating branch only starts during the transfer of the carrier to the work site and does not occupy the power during the work period.

Images