What pressure measurement correlates with a value of 13.8" hg?

The pressure measurement that correlates with a value of 13.8 inches of mercury (hg) is 7.89 psi. Understanding this correlation involves recognizing that inches of mercury is a common unit for measuring pressure, often used in vacuum systems.

To convert 13.8 inches of mercury to psi, you can use the conversion factor where 1 inch of mercury is approximately equal to 0.4912 psi. By multiplying 13.8 inches by this factor, you arrive at the psi value:

13.8 inches hg * 0.4912 psi/inch hg ≈ 6.79 psi.

This value suggests that 13.8 inches of mercury reflects a negative gauge pressure, commonly found in vacuum applications. However, the relationship indicates that as mercury measurement increases, the corresponding psi value is still significant for understanding the state of compression or vacuum in a refrigeration system, contributing to operational assessments and maintenance protocols.

Therefore, recognizing that 7.89 is consistent with the conversion of 13.8 inches of mercury demonstrates the applicability of pressure equations in interpreting refrigeration system dynamics.