When a refrigeration compressor is in the...

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Question 1 of 205eccef9dbacbc34ba4d45fba

When a refrigeration compressor is in the 'off' cycle, how will the thermal expansion valve respond?

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5eccef9dbacbc34ba4d45fba

When a refrigeration compressor is in the 'off' cycle, how will the thermal expansion valve respond?

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🔍 Key Concepts

• Thermal expansion valve (TXV) operation during normal running vs. when refrigerant flow stops • Relationship between compressor running, evaporator pressure, and TXV bulb/sensing temperature • Difference between systems with evaporator pump‑down (low pressure control) and systems controlled only by a space thermostat

💭 Think About

• Think about what provides the force that keeps a TXV open or closed. What happens to that driving force when the compressor stops and suction pressure starts to change? • In a pump‑down system, what does the low‑pressure cutout actually do to the evaporator pressure before the compressor turns off, and how would that affect the TXV position? • In a system with only a thermostat (no pump‑down), what happens to evaporator pressure and superheat when the compressor shuts off but liquid refrigerant is still present at the TXV inlet?

✅ Before You Answer

• For each choice, ask: Is there still pressure/temperature difference across the TXV that would keep it significantly open? • Check whether pump‑down means the evaporator is mostly emptied of liquid refrigerant before shut‑off, and how that influences the TXV • Decide whether a TXV can truly "keep controlling superheat" when there is little or no refrigerant flow through the evaporator.

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Question 1 of 205eccef9dbacbc34ba4d45fba

When a refrigeration compressor is in the 'off' cycle, how will the thermal expansion valve respond?

Back

Question 1 of 20

5eccef9dbacbc34ba4d45fba

When a refrigeration compressor is in the 'off' cycle, how will the thermal expansion valve respond?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

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