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The clearance volume is the volume remaining above the piston of an engine when it reaches top dead center. It represents the space between the piston and cylinder head at the end of the compression stroke.
The calculator uses the formula:
Where:
Explanation: The clearance volume is calculated by subtracting the stroke volume from the total volume of refrigerant in the compressor before compression occurs.
Details: Accurate clearance volume calculation is crucial for determining compressor efficiency, volumetric efficiency, and proper compressor sizing for refrigeration systems. It affects the compressor's ability to handle different refrigerant volumes and pressures.
Tips: Enter the total volume of refrigerant in the compressor and the stroke volume in cubic meters. Both values must be positive, and the total volume must be greater than the stroke volume for a valid calculation.
Q1: Why is clearance volume important in compressors?
A: Clearance volume affects compressor efficiency, re-expansion losses, and the amount of refrigerant that can be compressed in each cycle.
Q2: What are typical clearance volume values?
A: Clearance volume typically ranges from 2-10% of the swept volume, depending on compressor design and application.
Q3: How does clearance volume affect compressor performance?
A: Larger clearance volumes reduce volumetric efficiency because more refrigerant remains in the cylinder after discharge, reducing the amount of fresh refrigerant that can be drawn in.
Q4: Can clearance volume be adjusted?
A: In some compressor designs, clearance volume can be adjusted using clearance pockets or variable volume ratio mechanisms to optimize performance for different operating conditions.
Q5: What happens if clearance volume is too large?
A: Excessive clearance volume significantly reduces compressor capacity and efficiency due to increased re-expansion of trapped refrigerant.