Method for applying an absorbent or refrigerant
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Thermally driven absorption refrigeration systems face limitations, particularly with pure water as a refrigerant at ambient temperatures below 0°C, due to high heating requirements and inefficiencies with ionic liquids, which result in poorer heat and mass transfer densities compared to aqueous lithium bromide solutions.
Innovation Solution
A distribution device with a jet device is used to radiate the sorbent or refrigerant as jets onto the heat exchange surface, creating turbulent flows that enhance the absorption and desorption processes, improving heat and mass transfer densities by overcoming the limitations of ionic liquids and allowing efficient operation at temperatures below 0°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ionic liquids are used as absorbent, then the system can operate at temperatures below 0°C, but the heat and mass transfer densities are poorer
Solution Approach 1:
The patent applies dynamic jet injection to introduce the absorbent into the absorber, creating turbulent flow patterns that enhance heat and mass transfer. The jet device generates controlled chaos and mixing in the absorbent flow, transforming the static or laminar flow of ionic liquids into dynamic turbulent flow, thereby overcoming the poor transfer densities while maintaining sub-zero operating temperatures
Solution Approach 2:
The patent changes the flow regime parameter from laminar to turbulent by using jet injection. This parameter change fundamentally alters the heat and mass transfer characteristics of the ionic liquid absorbent, increasing the transfer densities by an order of magnitude while preserving the ability to operate at temperatures below 0°C
2Productivity
If aqueous lithium bromide solution is used, then high heat and mass transfer densities are achieved, but the system cannot operate efficiently at temperatures below 0°C
Solution Approach 1:
The patent changes the absorbent type parameter from aqueous lithium bromide solution to ionic liquids, which have different thermodynamic properties that enable sub-zero operation. Combined with the jet injection method, this parameter change allows the system to achieve both high transfer densities and low operating temperatures
3Ease of manufacture
If absorbent is applied by sprinkling, then the application is simple, but the heat and mass transfer efficiency is limited
Solution Approach 1:
The patent uses hydraulic jet injection to deliver the absorbent into the absorber. The jet device utilizes fluid dynamics and pressure-driven flow to inject the absorbent directly onto the heat exchange surface, creating turbulent flow patterns that dramatically enhance heat and mass transfer efficiency compared to simple sprinkling methods
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 approach enables the use of ethanol with ionic liquids to achieve similar heat and mass transfer densities as aqueous lithium bromide solutions, facilitating efficient operation at low temperatures and improving system performance with increased heat transfer and reduced viscosity-related issues.
Implementation Method 1
forming turbulent flows of the sorbent on the heat exchange surface
Implementation Method 2
the sorbent... at least partially absorbs the refrigerant from the refrigerant environment
Implementation Method 3
at least partially desorbs the refrigerant from the sorbent into an environment of the sorbent
Implementation Method 4
transfers the released heat (via the heat exchange surface) to the heat exchanger
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a device for an absorption refrigerator or an absorption heat pump having a heat exchanger through which a working medium flows, said device having a distribution apparatus for a sorbent which is designed to apply the sorbent to a heat exchange surface of the heat exchanger (1) in a refrigerant environment such that the sorbent, which forms a working pair with the refrigerant, at least partially absorbs the refrigerant from the refrigerant environment and emits heat released in the process to the heat exchanger, or at least partially desorbs the refrigerant from the sorbent into the environment of the sorbent and in the process receives heat from the heat exchanger. The distribution apparatus has a jet apparatus (2) which is designed to spray the sorbent in the form of one or more jets (5) onto the heat exchange surface, forming turbulent flows of the sorbent on the heat exchange surface. The invention also relates to an absorber, a desorber, an absorption refrigerator, an absorption heat pump, a method for applying an absorbent, a device for a refrigerator or a heat pump, and a method for applying a refrigerant.