Heating, Ventilation, and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9781119628798
Author: Faye C. McQuiston; Jerald D. Parker; Jeffrey D. Spitler
Publisher: Wiley Global Education US
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Chapter 1, Problem 1.10P
A room with dimensions of
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Determine the rate of sensible heat loss from a building due to infiltration if the outdoor air at – 5oC and 90 kPa enters the building at a rate of 35 liters per second when the indoor is maintained at 20oC
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Cold water at a rate of 30 L/min is mixed with hot water at 44 L/min in a continuous manner in a mixing chamber. The rate of water output from the mixing chamber (in kg/s) is
Chapter 1 Solutions
Heating, Ventilation, and Air Conditioning: Analysis and Design
Ch. 1 - Convert the following quantities from English to...Ch. 1 - Convert the following quantities from SI to...Ch. 1 - A pump develops a total head of 50 ft of water...Ch. 1 - A fan is observed to operate with a pressure...Ch. 1 - The electric utility rate for a facility during...Ch. 1 - For the business whose monthly electrical energy...Ch. 1 - Detmine the interest rate at which the project in...Ch. 1 - How much could a company afford to spend on an...Ch. 1 - Make the following volume and mass flow rate...Ch. 1 - A room with dimensions of 31020m is estimated to...
Ch. 1 - Compute the heat transferred from water as it...Ch. 1 - Air enters a heat exchanger at a rate of 5000...Ch. 1 - Water flowing at a rate of 1.5 kg/s through a heat...Ch. 1 - Air at a mean temperature of 50 F flows over a...Ch. 1 - Repeat Problem 1-10 for air at 10 C, a tube with...Ch. 1 - Air at 1 atm and 76 F is flowing at the rate of...Ch. 1 - Air flowing at the rate of 1000 cfm and with a...Ch. 1 - A chiller is providing 5 tons of cooling to an air...Ch. 1 - Air is delivered to a room at 58 F and the same...Ch. 1 - A chiller is to pro;ide 12 tons of cooling to a...Ch. 1 - Air is being rnished to a 30-ft by 40-ft by 12-ft...Ch. 1 - If cold outside air at 20 F is leaking into a...Ch. 1 - A Btu-meter is a device that measures water flow...Ch. 1 - A heat pump uses a 100,000-gallon swimming pool as...Ch. 1 - A heat pump uses a 100,000-gallon swimming pooi as...
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- Air whose density is 0.082 lbm/ft3 enters the duct of an air-conditioning system at a volume flow rate of 450 ft3/min. If the diameter of the duct is 16 in, determine the velocity of the air at the duct inlet and the mass flow rate of air.arrow_forwardFind the dryness fraction of a steam having a specific volume of 15 m3 /kg after expansion in a turbine. The specific volumes of saturated liquid and saturated vapor corresponding to the pressure are 0.001 m3 /kg and 15.25 m3 /kg, respectively.arrow_forwardA cooling tower is a device that cools a spray of water by passing it through a stream of air. If 15 m3/s of air at 30°C dry-bulb and 20°C wet-bulb temperature and an atmospheric pressure of 90 kPaa enters the tower and the air leaves saturated at 28°C. This air stream cool a spray of water entering at 35°C with a flow rate of 20 kg/s. What is the partial vapor pressure of entering air in kPaa?arrow_forward
- Subject : Thermofluid Question : Water enters a hydraulic turbine through a 40-cm diameter pipe at a rate of 0.6 m3/s and exits through a 25-cm diameter pipe as shown by Figure 2. The pressure drop in the turbine is measured by a mercury manometer to be 1.4 m. For a combined turbine–generator efficiency of 80 percent and disregarding the effect of the kinetic energy correction factors.Determine the net electric power output. [Note: Take the density of water to be 1000kg/m3]arrow_forwardA fan is to be selected to ventilate a bathroom whose dimensions are 2 m × 3 m × 3 m. The air velocity is not to exceed 7 m/s to minimize vibration and noise. The combined efficiency of the fan–motor unit to be used can be taken to be 50 percent. If the fan is to replace the entire volume of air in 15 min, determine (a) the wattage of the fan–motor unit to be purchased, (b) the diameter of the fan casing, and (c) the pressure difference across the fan. Take the air density to be 1.25 kg/m3 and disregard the effect of the kinetic energy correction factors.arrow_forwardA fluid flows at 450 ft/s with specific volume of 12.8 ft3 /lbm, pressure of 14.7 psia and specific enthalpy of 430 Btu/lbm. Determine (a) the specific internal energy and (b) the total energy if potential energy is neglected. Ans: 395.2 Btu/lbm; 434.04 Btu/lbmarrow_forward
- Air at a rate of 1000cfm is cooled from 80⁰Fdb and 70⁰Fwb until it is saturated at 55⁰F. Determine the amount of moisture removed (lb/min), sensible heat removed (BTU/min), total heat removed (BTU/min), and the sensible heat factor.arrow_forwardA desktop computer is to be cooled by a fan whose flow rate is 0.40 m3/min. Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3. Also, if the average velocity of air is not to exceed 110 m/min, determine the minimum diameter of the casing of the fan.arrow_forwardAir enters the duct of an air-conditioning system at 15 psia and 50°F at a volume flow rate of 450 ft3 /min. The diameter of the duct is 10 in, and heat is transferred to the air in the duct from the surroundings at a rate of 2 Btu/s. Determine the velocity of the air at the duct inlet.arrow_forward
- Determine the rate of sensible heat loss from a building due to infiltration if the outdoor air at – 5oC and 90 kPa enters the building at a rate of 35 liters per second when the indoor is maintained at 20oC a. 0.35 kW c. 0.53 kW b. 0.37 kW d. 0.73 kWarrow_forward1. What is the specific enthalpy at the outlet of the turbine and compressor in KJ/Kg 2.what is the power output per unit mass flow rate of air of the turbine . 3.what is the rate of heat input per unit mass flow rate of the air during the heat addition processarrow_forwardThe change of enthalpy of air in a cooling tower is 53 Btu/lb and the mass flow of air is 435.71 lb/min. Water enters the tower at the rate of 50 gpm and 115 °F. Determine the exit temperature.arrow_forward
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