Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 35, Problem 14RQ
If the fresh-air requirements for the house in question 13 were to be 0.4 air changes per hour, how much fresh air must be taken in per minute?
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1. If 1 gallon of oil = 1.4 therm, how many gallons have been wasted by heat loss in Feb? (1 therm = 100,000 BTU)_____________________________________________________________________________________2. If $1.30 per therm, how much did you waste from house heat loss in Feb?
#9
4. Relative Humidity calculations (use the Water vapor Pressures and Contents scale)!
The actual water content (absolute humidity) of a sample of room air is measured and is
°C, what is the relative
found to be
If the room temperature is
humidity?
Use examples below to fill in the blanks above:
a. Absolute humidity is 11.91 mg/L; Temperature is at 24 °C
b. Absolute humidity is 13.89 mg/L; Temperature is at 30°C
c. Absolute humidity is 10.01 mg/L; Temperature is at 60 °F
Chapter 35 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 35 - Name the four comfort factors.Ch. 35 - State three ways the body gives off heat.Ch. 35 - Lower room temperatures can be offset in winter by...Ch. 35 - Perspiration cools the body by________.Ch. 35 - Relative humidity is measured using a A....Ch. 35 - Name the two unknowns that are easiest to obtain...Ch. 35 - Air that contains all of the moisture that it can...Ch. 35 - In order for an air-conditioning coil to remove...Ch. 35 - For a room to be comfortable, the following...Ch. 35 - With a dry-bulb reading of 70F and a wet-bulb...
Ch. 35 - Relative humidity in question 10 is _______%.Ch. 35 - A gas furnace has an output of 60,000 Btu/h. The...Ch. 35 - A house has 3500ft2 of floor space and a 9-ft...Ch. 35 - If the fresh-air requirements for the house in...Ch. 35 - If the outside fresh-air conditions were to be 93F...Ch. 35 - If the air leaving the cooling coil were to be 55F...Ch. 35 - Using the answers from questions 14, 15, and 16,...Ch. 35 - Describe why fresh air is important in a house.
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