Evaporative Cooling Insulation for Hydrocarbon Holdup
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Solution Overview
Problem
In hydrocarbon production processes, excessive fugitive heat leads to inefficiencies and environmental issues, and existing insulation methods are costly and energy-intensive, while also causing hydrocarbon holdup in insulating layers.
Innovation Solution
A thermal insulation system using a porous insulating material with distributed liquid water, where the evaporation of water absorbs heat and creates a continuous vapor flow to maintain the insulating layer's temperature and prevent hydrocarbon condensation and holdup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional insulation methods are used to reduce heat loss, then heat retention is improved, but hydrocarbon holdup occurs in the insulating layer
Solution Approach 1:
The patent utilizes the phase transition of water from liquid to vapor through evaporation. Water is introduced into the insulating layer where it evaporates, absorbing heat in the process. The resulting water vapor flows through the insulating layer, creating a convective current that prevents hydrocarbon condensation and holdup while maintaining thermal insulation effectiveness.
2Loss of energy
If freeze walls are used to prevent heat loss in in-situ processes, then heat retention is improved, but energy consumption and cost increase
Solution Approach 1:
The system introduces water into the insulating layer where it automatically evaporates using the heat already present from the heated material. This self-service mechanism absorbs excess heat and prevents fugitive heat loss without requiring external energy input or complex refrigeration systems, making the process energy-efficient and cost-effective.
3Loss of energy
If above-ground retorts with insulation are used to produce hydrocarbons, then heat retention is improved, but the system complexity and cost increase
Solution Approach 1:
The patent changes the thermal parameters of the insulating layer by introducing water that undergoes phase transition. This transforms the insulating layer from a passive thermal barrier to an active thermal management system that dynamically adjusts heat absorption through evaporation, simplifying the overall system design while maintaining effective heat retention.
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
This solution effectively reduces heat loss, minimizes hydrocarbon holdup, and maintains efficient hydrocarbon recovery by utilizing the high latent heat of vaporization of water, thereby improving process efficiency and reducing costs.
Implementation Method 1
Heat from the body of heated material can cause the water to evaporate. Due to the high latent heat of vaporization of water, a large amount of heat can be absorbed by the evaporating water without raising the temperature of the insulating layer.
Implementation Method 2
Due to the high latent heat of vaporization of water, a large amount of heat can be absorbed by the evaporating water without raising the temperature of the insulating layer.
Implementation Method 3
Water vapor can flow from the insulating layer toward the body of heated material. The amount of water in the insulating layer can be sufficient so that the insulating layer also has a continuous flow of water vapor.
Data Source
AI summary
A thermal insulation system can include a body of heated material at an elevated temperature. A layer of porous insulating material can be placed adjacent to and in fluid communication with the body of heated material. The insulating layer can contain distributed liquid water in an amount sufficient to cool the insulating layer through evaporative vapor flow toward the body of heated material. The amount of water can be sufficient to provide water vapor for inhibiting the diffusion and adsorption of hydrocarbons from the heated material. The insulating layer can include a continuous vapor phase. A heat sink material at a lower temperature can be placed adjacent to the insulating layer and opposite from the body of heated material.