A Liquid to Liquid Counterflow Heat Exchanger Is Used to Heat

question 18

Multiple Choice

A liquid to liquid counterflow heat exchanger is used to heat cold fluid from 50°C to 150°C. Assuming that the hot fluid enters at 250°C and leaves at 200°C, the log mean temperature difference for the heat exchanger will be closer to

• A)137°C
• B)37,500 kg
• C)128°C
• D)133°C
• E)100°C

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Definitions:

Absolute Value

The distance of a number from zero on the number line, disregarding whether it is positive or negative.

Set Notation

A system of symbols and terminology used to define and describe sets and their relationships in mathematics.

Absolute Value Inequality

An inequality that involves the absolute value of a variable or expression, comparing it to a number.

Absolute Values

The distance of a number from zero on the number line, disregarding the sign of the number.