Boiling cooling device and boiling cooling system
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Solution Overview
Problem
Conventional boiling cooling devices experience reduced cooling capacity due to impurity precipitation on the heat transfer surface, which hinders the boiling process and impairs heat transfer efficiency.
Innovation Solution
A boiling cooling system that incorporates a microbubble generator to produce microbubbles, which are introduced into the refrigerant to promote boiling and clean the heat transfer surface, comprising a pump, microbubble generator, boiling cooler, radiator, and gas-liquid separator to maintain efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fine spiral grooves are formed on the heat transfer tube surface to promote boiling, then boiling occurrence is enhanced, but impurities precipitate on the grooves and cover the heat transfer surface, lowering cooling capacity
Solution Approach 1:
The microbubble generator introduces microbubbles into the refrigerant before it reaches the boiling cooler. These microbubbles serve as preliminary foam nucleuses that attach to the heat transfer surface, creating controlled nucleation sites that prevent impurity accumulation on the grooves while maintaining boiling efficiency
Solution Approach 2:
Microbubbles act as an intermediary substance between the refrigerant and the heat transfer surface. They facilitate boiling by providing alternative nucleation sites away from the grooves, preventing impurities from directly contacting and covering the heat transfer surface
2Temperature
If fine grooves are formed on the heat transfer surface to enhance boiling, then heat transfer efficiency is improved, but the grooves become covered with precipitated impurities, hindering boiling
Solution Approach 1:
The microbubble generator extracts the nucleation function from the heat transfer surface grooves and relocates it to microbubbles in the refrigerant flow. This separates the boiling promotion function from the heat transfer surface, preventing impurities from covering the grooves
Solution Approach 2:
Instead of relying on the physical grooves on the heat transfer surface to create nucleation sites, the system creates virtual nucleation sites using microbubbles in the refrigerant. These bubble-based nucleation sites replicate the function of groove-based nucleation without the associated impurity accumulation problem
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 promotes boiling and prevents cooling capacity degradation by using microbubbles as foam nucleuses, enhancing heat transfer and maintaining performance over time by preventing impurity adhesion and maintaining heat transfer efficiency.
Implementation Method 1
a microbubble generator to produce microbubbles and incorporate the microbubbles into the refrigerant discharged from the pump
Implementation Method 2
a boiling cooler to which the refrigerant containing the microbubbles is supplied and which boils the refrigerant
Implementation Method 3
a radiator to cool the refrigerant after the refrigerant is boiled and before the refrigerant is taken in by the pump
Implementation Method 4
a gas-liquid separator to separate gas from the circulating refrigerant after the refrigerant is boiled and before the refrigerant is taken in by the pump
Implementation Method 5
a pump to circulate refrigerant
Data Source
AI summary
A boiling cooling device and a boiling cooling system which can promote boiling and restrain the cooling capacity of the device from deteriorating. A boiling cooling device includes: a pump to circulate refrigerant; a microbubble generator to produce microbubbles and incorporate the microbubbles into the refrigerant discharged from the pump; a boiling cooler to which the refrigerant containing the microbubbles is supplied and which boils the refrigerant; a radiator to cool the refrigerant after the refrigerant is boiled and before the refrigerant is taken in by the pump 11; and a gas-liquid separator 15 to separate gas from the circulating refrigerant after the refrigerant is boiled and before the refrigerant is taken in by the pump.