In consulting the refrigerant pressure-enthal...

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Question 1 of 205eccef9dbacbc34ba4d45e5a

In consulting the refrigerant pressure-enthalpy and mechanical refrigeration system diagrams shown in the illustration, in the direction of refrigerant flow, what letters in the pressure-enthalpy diagram correspond to points 9 and 1 on the refrigeration cycle diagram? See illustration GS-RA-21.

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🔍 Key Concepts

• Follow the direction of refrigerant flow through the mechanical refrigeration cycle (numbers 1–9). • Relate each numbered point (especially compressor suction and discharge) to the states on the pressure-enthalpy diagram. • Recognize that the line between the two letters you choose must represent the compression process (low-pressure vapor to high-pressure vapor).

💭 Think About

• On the piping diagram, which component is located between points 9 and 1, and what thermodynamic process happens there? • Looking at the pressure-enthalpy diagram, which segment shows refrigerant going from low pressure to high pressure without passing through the condenser or evaporator? • Which lettered point best represents the refrigerant condition entering the compressor (suction) and which represents the discharge condition (leaving the compressor)?

✅ Before You Answer

• Verify which numbered points in the mechanical diagram are before and after the compressor in the direction of flow. • On the pressure-enthalpy chart, confirm which endpoints of each lettered segment go from low-pressure region to high-pressure region (compression) rather than remaining at constant pressure. • Make sure the starting letter you select matches the end of the evaporator/suction line, and the ending letter matches the start of the condenser/discharge line.

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