How does compressor volumetric capacity change when suction temperature drops_________________?
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Answer: A. increases
Explanation
When suction temperature drops, incoming refrigerant gas density increases, which enhances mass flow rate and volumetric capacity. Higher gas density means each stroke of the compressor pumps a greater mass of refrigerant through the refrigeration cycle. This increased mass flow directly translates into higher cooling capacity produced by the vapor-compression refrigeration system. Compressor volumetric capacity depends directly on the density of suction vapor entering the cylinder during the intake stroke. Gas laws dictate that lowering the temperature of a confined gas at constant pressure increases its density significantly. Refrigeration compressors act as volumetric displacement devices designed to move specific cubic volumes of gas per minute.
Stating that capacity decreases ignores the direct proportional relationship between gas density and mass flow rate in compressors. Capacity remaining unaffected contradicts basic thermodynamic gas laws governing refrigerant vapor density and volumetric flow. Capacity fluctuating unpredictably is incorrect because compressor behavior follows strict, predictable thermodynamic principles.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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