The presence of flash gas in the high...

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Question 1 of 205eccef9ebacbc34ba4d4618a

The presence of flash gas in the high pressure liquid lines of a refrigeration system is undesirable due to which of the following reasons? erosion of the TXV valve seat will be increased refrigeration system capacity will be decreased

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🔍 Key Concepts

• Flash gas in high-pressure liquid lines and how it forms • Effect of gas vs liquid state on expansion valves (TXV – thermostatic expansion valve) • How flash gas affects cooling capacity and valve erosion in a refrigeration system

💭 Think About

• Think about what the TXV is designed to work with: is it expecting mostly liquid, mostly vapor, or a mix at its inlet? How would flash gas change the flow through the valve seat? • If part of the liquid line has already flashed to gas before the expansion valve, what happens to the amount of liquid actually available to flash in the evaporator and absorb heat? • Consider whether gas bubbles moving at high velocity over a valve seat are more or less likely to cause mechanical erosion compared with pure liquid flow at the same conditions.

✅ Before You Answer

• Be clear on the difference between liquid line and suction line conditions and where flash gas is a problem. • Verify how system capacity is defined (amount of heat the system can remove) and how reduced liquid to the evaporator would change that. • Ask yourself whether erosion of the valve seat is a typical, primary concern mentioned in standard refrigeration texts when discussing flash gas in the liquid line.

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