Iodine Plasma Generator Feedback Control
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Solution Overview
Problem
Conventional plasma generators using Xenon as a propellant require high-pressure storage in cylindrically symmetric tanks, which compromises storage density and is expensive, whereas iodine, being more reactive and less expensive, can be stored at low pressure in non-cylindrically symmetric tanks, but lacks effective flow rate regulation in existing systems.
Innovation Solution
An iodine fueled plasma generator system with a feedback control subsystem that regulates the flow rate of iodine vapor based on discharge current, pressure, and temperature, using a thermal throttle to modulate viscosity and phase changes, and includes non-cylindrically symmetric storage and accumulator vessels for increased density and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If iodine is used as propellant instead of xenon, then cost is reduced and storage density is improved, but flow rate regulation capability deteriorates
Solution Approach 1:
The system changes the physical state parameter of iodine from condensed phase to vapor phase through controlled heating, enabling flow regulation. The heating device adjusts iodine temperature to control vapor pressure and flow rate to the plasma generator, transforming iodine's properties to achieve both high storage density and controllable flow.
Solution Approach 2:
The system utilizes phase transition of iodine from solid/liquid condensed phase to vapor phase. The heating device induces this phase change, and the resulting vapor flow is regulated by controlling the heating parameters, thereby achieving flow rate regulation while maintaining high storage density in the condensed phase.
2Volume of moving object
If iodine is stored at low pressure in non-cylindrically symmetric tanks, then storage density improves, but conventional flow control methods become ineffective
Solution Approach 1:
The system replaces conventional mechanical flow control mechanisms (valves, mass flow controllers) with a thermal control system. By using a heating device to control iodine vapor generation, the system achieves flow regulation through thermal parameters rather than mechanical adjustments, simplifying the flow control mechanism while improving storage volume efficiency.
Solution Approach 2:
The heating device acts as an intermediary between the condensed phase iodine storage and the plasma generator. It transforms the iodine and regulates the vapor flow, mediating the transition from high-density storage to controlled delivery without requiring complex flow control hardware in the low-pressure storage system.
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 enhances storage density, reduces costs, and improves performance by effectively regulating iodine vapor flow to the plasma generator, allowing for higher thrust-to-power ratios and easier high-power testing.
Implementation Method 1
a heating device proximate to the storage vessel configured to create iodine vapor from the condensed phase iodine
Implementation Method 2
The thermal throttle may be configured to use temperature to modulate the viscosity of the iodine vapor to regulate the flow rate of the iodine vapor to the plasma generator
Implementation Method 3
The thermal throttle may be configured to change the phase of the iodine vapor to regulate the flow rate of the iodine vapor to the plasma generator
Data Source
AI summary
An iodine fueled plasma generator system includes a plasma generator. At least one storage vessel is configured to store condensed phase iodine therein. A heating device proximate to the storage vessel is configured to create iodine vapor from the condensed phase iodine. A propellant management subsystem is configured to deliver the iodine vapor to the plasma generator. A feedback control subsystem is responsive to one or more of plasma generator discharge current, the pressure of the iodine vapor, and/or the temperature of the iodine vapor configured to regulate the flow rate of the iodine vapor to the plasma generator.