Engineering Board Exam Reviewer · Thermodynamics · medium

Water enters a cooling tower at 40 °C and leaves at 30 °C. The entering air has a wet-bulb temperature of 25 °C. What are the range and approach?

  1. Range = 5 ° C, Approach = 10 ° C
  2. Range = 10 ° C, Approach = 5 ° C
  3. Range = 15 ° C, Approach = 10 ° C
  4. Range = 10 ° C, Approach = 15 ° C

Answer

B. Range = 10 ° C, Approach = 5 ° C

Solution

Range = 40 - 30 = 10 ° C. Approach = 30 - 25 = 5 ° C.

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