A coke packed humidifier is to be designed to cool 3,000 cfm of saturated air from 150 to 75 °F at barometric pressure. Cooling water at 50°F will be allowed to heat up to 100°F. Gas velocity will be 3,000 lb of dry air per sq ft of total cross section. Water velocity is 1,200 lb/h per sq ft of total cross section. Over-all coefficient of sensible heat transfer from air to water = 300 BTU/h·ft3·°F. Calculate the height and diameter of cooling tower required. Round your answers to the nearest 0.05 ft.
A coke packed humidifier is to be designed to cool 3,000 cfm of saturated air from 150 to 75 °F at barometric pressure. Cooling water at 50°F will be allowed to heat up to 100°F. Gas velocity will be 3,000 lb of dry air per sq ft of total cross section. Water velocity is 1,200 lb/h per sq ft of total cross section. Over-all coefficient of sensible heat transfer from air to water = 300 BTU/h·ft3·°F. Calculate the height and diameter of cooling tower required. Round your answers to the nearest 0.05 ft.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter1: Heat, Temperature, And Pressure
Section: Chapter Questions
Problem 17RQ: Convert 22C to Fahrenheit.
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Question
- Show your complete solution to the questions given below. State all assumptions used during the Draw relevant figures, if necessary.
- Do not round off during your calculations. Unless otherwise specified, express your final answer/s to the nearest four decimal If it is a very small/very large number, express your final answer/s in scientific notation to the nearest two decimal places.
Box your final answers.
PROBLEM 5
A coke packed humidifier is to be designed to cool 3,000 cfm of saturated air from 150 to 75 °F at barometric pressure. Cooling water at 50°F will be allowed to heat up to 100°F. Gas velocity will be 3,000 lb of dry air per sq ft of total cross section. Water velocity is 1,200 lb/h per sq ft of total cross section. Over-all coefficient of sensible heat transfer from air to water = 300 BTU/h·ft3·°F. Calculate the height and diameter of cooling tower required. Round your answers to the nearest
0.05 ft.
ANSWERS:
|
|
Answer |
Maximum Points |
Actual Points |
|
Volume of Air |
|
100 |
|
|
Height of Tower |
|
80 |
|
|
Diameter of Tower |
|
20 |
|
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