Heat transfer systems, compositions and methods
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Solution Overview
Problem
Exposure of zinc-containing components to refrigerant and lubricant in heat transfer systems leads to corrosion and deterioration, affecting the longevity and robustness of the system and working fluid.
Innovation Solution
Incorporating a protective agent comprising a compound according to Formula I, where R and R1 are independently selected from hydrogen, alkyl, hydroxyalkyl, and alkylthio, into the working fluid to protect zinc-containing components and refrigerants from corrosion and deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zinc-containing components are used in heat transfer systems, then system robustness and longevity are improved, but corrosion and deterioration occur when exposed to refrigerant and lubricant
Solution Approach 1:
The patent introduces an intermediary substance (protective agent or coating) that mediates between the zinc-containing components and the refrigerant-lubricant mixture. This intermediary layer prevents direct contact between the harmful refrigerant mixture and the zinc surface, thereby eliminating corrosion while allowing the zinc components to maintain their structural integrity and protective functions throughout the system's operational life.
2Productivity
If zinc-containing components are exposed to working fluid, then heat transfer operation is enabled, but deterioration of refrigerant and lubricant occurs
Solution Approach 1:
The protective agent serves as an intermediary barrier that allows heat transfer operations to proceed normally while preventing chemical reactions between the zinc components and the refrigerant-lubricant mixture. This intermediary layer maintains the chemical stability of the working fluid by blocking direct contact with zinc surfaces that would otherwise catalyze deterioration reactions.
Solution Approach 2:
The patent creates an inert protective environment around the zinc components through the application of protective agents or coatings. This inert layer isolates the reactive zinc surface from the working fluid, preventing chemical reactions that would lead to refrigerant and lubricant deterioration, while still permitting the system to function as intended.
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 protective agent enhances the chemical stability and longevity of zinc-containing components and refrigerants, providing improved performance and durability of heat transfer systems.
Implementation Method 1
the working fluid comprising refrigerant and at least one protective agent comprising a compound according to Formula I
Data Source
AI summary
The present invention relates to heat transfer systems and methods involving zinc-containing surfaces in contact with a working fluid comprising refrigerant, lubricant and a protective agent comprising a compound according to Formula I:where R and R1 are each independently selected from the group consisting of hydrogen, alkyl, hydroxyalkyl and alkylthio, provided that at least one of R and R1 is alkylthio.