Two-Phase Closed Thermosiphon Condenser for Rapid Distillation Control
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Solution Overview
Problem
Maintaining precise distillation conditions in petroleum distillation processes is challenging due to the varying characteristics of petroleum constituents, and existing condensers like ice water or circulating cooling baths fail to meet the required temperature gradient and rapid temperature change needs.
Innovation Solution
A two-phase closed thermosiphon (TPCT) condenser system using a working fluid that circulates without a mechanical pump, maintaining a constant temperature through a boiling fluid's isochoric nature, assisted by gravity, with copper tubing and a controller to manage heating and cooling elements for efficient heat removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ice water or circulating cooling baths are used to cool the condenser, then cooling is provided, but the temperature gradient cannot be maintained below the threshold and rapid temperature changes cannot be achieved
Solution Approach 1:
The patent replaces the mechanical recirculation pump system with a thermosiphon-based passive circulation system. The working fluid circulates through the condenser coils and heat exchanger driven by natural convection and phase change, eliminating mechanical components that compromise temperature control reliability and gradient maintenance.
Solution Approach 2:
The patent utilizes phase transitions of the working fluid (liquid to vapor and back) to achieve efficient heat transfer. The fluid evaporates in the heat exchanger absorbing heat from the distillation apparatus and condenses in the condenser coils releasing heat to the cooling medium, maintaining precise temperature gradients through latent heat exchange.
2Ease of operation
If recirculation pumps are used to circulate cooling fluid, then cooling fluid circulation is achieved, but device complexity and maintenance needs increase
Solution Approach 1:
The thermosiphon system is self-regulating and requires no external control or mechanical intervention. The working fluid automatically circulates through evaporation and condensation cycles, with the phase change process itself driving the circulation and maintaining equilibrium without pumps, valves, or controls.
Solution Approach 2:
The patent eliminates mechanical recirculation pumps and associated mechanical systems by using a passive thermosiphon mechanism where natural convection and phase change drive the cooling fluid circulation, significantly reducing device complexity and maintenance requirements.
3Temperature
If conventional condensers are used, then condensation of vapors is achieved, but the temperature must be changed rapidly for different samples which is difficult to accomplish
Solution Approach 1:
The thermosiphon system dynamically adapts to different temperature requirements for different petroleum samples. By adjusting the cooling medium temperature or flow rate, the system rapidly achieves new thermal equilibrium states, with the phase change mechanism enabling quick response to temperature changes without thermal inertia from large fluid volumes or mechanical systems.
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 TPCT condenser achieves a low temperature gradient and rapid temperature adjustments, ensuring accurate distillation results with reduced maintenance needs and increased reliability by eliminating the need for recirculation pumps.
Implementation Method 1
A two-phase closed thermosiphon (TPCT) condenser system using a working fluid that circulates without a mechanical pump, maintaining a constant temperature through a boiling fluid's isochoric nature
Implementation Method 2
A two-phase closed thermosiphon (TPCT) condenser system using a working fluid that circulates without a mechanical pump, maintaining a constant temperature through a boiling fluid's isochoric nature
Implementation Method 3
A two-phase closed thermosiphon (TPCT) condenser system using a working fluid that circulates without a mechanical pump, maintaining a constant temperature through a boiling fluid's isochoric nature, assisted by gravity
Implementation Method 4
a cooling element coupled to the condensation block, wherein the controller is further configured to control the cooling element to condense vapors of the working fluid in the condensation block
Implementation Method 5
a heating element coupled to an outside of the outer tube; and a controller configured to control the heating element to heat a working fluid in the outer tube
Data Source
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AI summary
A distillation condenser may include an inner condenser tube that includes an inlet to receive vapors from a distillation vessel and an outlet to connect to a reception vessel to receive a distilled liquid condensed from the vapors; an outer tube enclosing the inner condenser tube; and a heating element coupled to an outside of the outer tube. The distillation condenser may further include a controller configured to control the heating element to heat a working fluid in the outer tube and to cause the distillation condenser to function as a two-phase closed thermosiphon (TPCT) as a result of the heated working fluid.