It is necessary to replace the defective thermal expansion valve in a refrigeration system. If the valve is improperly sized, what could be the result? starvation of the evaporator coil if the valve is undersized constant hunting of the TXV and pressure surging if the valve is oversized
• Behavior of a thermal expansion valve (TXV) in a refrigeration system • What happens to evaporator feeding when a TXV is too small vs. too large • Effects of hunting and pressure surging in refrigeration controls
• Think about how refrigerant flow through the TXV affects how full or empty the evaporator coil becomes under normal load. • Consider what a physically smaller (undersized) or larger (oversized) valve means for its ability to control refrigerant flow accurately. • Ask yourself: which of the two listed effects logically follows from not having enough flow capacity, and which from having too much, reacting too strongly to temperature/pressure changes?
• Verify what starvation of the evaporator coil means in terms of refrigerant flow and valve capacity. • Review what hunting of a TXV is, and why an oversized control device might tend to overcorrect. • Confirm whether both, one, or neither of the described effects are realistic outcomes in standard refrigeration theory.
No comments yet
Be the first to share your thoughts!