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Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 4, Problem 4.8P
An occupied space is being held at 76 F (24 C) and 50 percent relative humidity. A measurement of the globe temperature gives 80 F (27 C), and the mean air velocity is determined to be 30 fpm (0.15 m/s). Is this facility comfortable for sedentary functions of a mixed group in light clothing in the summer? If not, how would you attempt to change the situation?
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Chapter 4 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
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Ch. 4 - Discuss how an emergency government mandate to set...Ch. 4 - In the heating seasons the heat loss from a...Ch. 4 - Air motion can be good or bad, depending on the...Ch. 4 - To save energy in large, chilled water systems,...Ch. 4 - Overhead fans (Casablanca fans) are often reversed...Ch. 4 - A school classroom is designed for 30 people. (a)...Ch. 4 - Carbon dioxide is being generated in an occupied...Ch. 4 - Each person in a room is assumed to be producing...Ch. 4 - An air-handling system must handle 2000 cfm with a...Ch. 4 - Prob. 4.20PCh. 4 - How many filter modules will be required using the...Ch. 4 - Work Problem 4-21 assuming that the filter is a...Ch. 4 - The M-200, 0.60.60.2 filters of Table 4-3 are to...Ch. 4 - Investigate the feasibility of using 100 percent...Ch. 4 - Work Problem 4-24 but replace the 100 percent...Ch. 4 - Using M-15 filter media and the requirement of 60...Ch. 4 - A filter system is available that will filter out...Ch. 4 - A maximum of 10 smokers are anticipated in a smong...Ch. 4 - Solve Ex. 4-4 assuming that the filter is in...Ch. 4 - Solve Problem 4-28 assuming that the filter is in...Ch. 4 - Fora 3000-ft3 combination and exercise operation,...Ch. 4 - A classroom with a capacity of 225 people is...
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- Q 6: The air in a room has a pressure of 101.3 kPa and a dry bulb temperature of 24°C, with a wet bulb temperature of 17°C. Using the psychrometric chart determine the humidity ratio, the enthalpy, the relative humidity, the dew point temperature, and the specific volume of the humid air. (Ans : 0.0094 kgv/kgda, 47.6 kJ/kgda, 50%, 12.9°C, 0.854 m/kgda) 3arrow_forwardFor air at 80 8C dry bulb temperature and 20 8C dew-point temperature, determine its humidity, relative humidity, wet bulb temperature, enthalpy, humidvolume and humid heat.arrow_forward12 bales of cotton, each weighing 486 lb, were held for conditioning in a humid warehouse kept at a relative humidity of 95%. Calculate the total mass of water, in lb, held within these bales at the end of the conditioning period.arrow_forward
- Ambient air is at a pressure of 100 kPa, dry bulb temperature of 300C and 60% relative humidity. The saturation pressure of water at 300C is 4.24 kPa. The specific humidity of air (in g/ kg of dry air) is (correct to two decimal places).arrow_forwardMoist air at 32 degrees Cdb and relative humidity of 60% enter a refrigeration system with a flow rate of 90 kg/min. Saturated air at 15 degrees Cdb leaves the system. Calculate the heat and moisture removed in kW and kg/s respectively.arrow_forwardplease do asaparrow_forward
- Please don't provide handwritten solution ....arrow_forwardThe total volume of a new house is 685 m3. Before the heat is turned on, the air temperature inside is 10°C, and the relative humidity is 46 percent. After the air is warmed to 15°C how much water vapor must be added to the air to make the relative humidity 46 percent?arrow_forwardCalculate the specific humidity if the relative humidity is50% and the capacity of the air (saturation specifichumidity) is 30g/kg. answer choices can be: 15 g/kg0.15 g/kg0.60 g/kg60 g/kgarrow_forward
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