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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Chapter 1, Problem 1.3P
A pump develops a total head of 50 ft of water under a given operating condition. What pressure is the pump developing in SI units and terminology?
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Chapter 1 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
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- Oil of specific gravity 0.80 is being pumped. A pressure gage located downstream of the pump reads 280 kpa. What is the pressure head in meter of oil?arrow_forwardA pump has a displacement volume of 5 in3. rotates at 1000 rpm and 1000 psi. If the volumetric efficiency is 92% and the mechanical efficiency is 89%. What is the overall efficiency of the pump?.arrow_forwardFind the pressure head at entry of the pipe, when the pressure of flowing fluid is 275 N/cm? The pressure head at entry (Unit in Pascal)?arrow_forward
- A pressure gage is attached to the pump and reads 85 kPa. if tha atmospheric pressure is 29.9 Hg, what is the absolute pressure of water pumped?arrow_forwardThe plunger diameter of a single-acting reciprocating pump is 115 mm and the stroke is 230 mm. The suction pipe is 90 mm in diameter and 4.2 m long. If cavitation takes place at the suction head of 4 m, the barometer stands at 10.3 m of water, and the water level in the sump is 3 m below the pump cylinder axis.3.1 Find the maximum allowable speed to operate the pump3.2 What power is expected in overcoming friction at this speed, take ƒ = 0.01arrow_forwardThe plunger diameter of a single-acting reciprocating pump is 115 mm and the stroke is 230 mm. The suction pipe is 90 mm in diameter and 4.2 m long. If cavitation takes place at the suction head of 4 m, the barometer stands at 10.3 m of water, and the water level in the sump is 3 m below the pump cylinder axis. 3.1 Find the maximum allowable speed to operate the pump 3.2 What power is expected in overcoming friction at this speed, takef = 0.01arrow_forward
- What is the power ratio of a pump to its 1/5 scale model if the ratio of the heads is 4 to 1?arrow_forwardA farmer has a pump which discharges 100 lpm of water at a head of 10 m. The pump is driven by anelectric motor at speed of 1700 rpm through 4”x 4” pulley-drive combination for the motor and thepump, respectively, what would be the pump output if the motor pulley is changed to six inchesdiameter?arrow_forwardFor a pumper truck pumping water to a fire, the back pressure is the additional pressure on the pump caused by the height of the nozzle. (Another way of thinking of back pressure is as the minimum pressure the pumper must produce in order to make water flow out the end of the nozzle.) Consider a pumper at street level pumping water through a hose to firefighters on the top of the ninth floor of a building. If each floor is 16 feet high, what is the head of water at the mouth of the nozzle?arrow_forward
- A water pump develops a total head of 200 ft. The pump efficiency is 80% and the motor efficiency is 87.5%. If the power rate is 1.5 cents per kw-hr, what is the power cost for pumping 1000 gal/hr?arrow_forwardThe performance data for a centrifugal water pump are shown in Table for water at 77°F (gpm = gallons per minute). (a) For each row of data, calculate the pump efficiency (percent). Show all units and unit conversions for full credit. (b) Estimate the volume flow rate (gpm) and net head (ft) at the BEP of the pumparrow_forwardNot yet answered سؤال 1 Marked out of 100.00 A closed reservoir filled by water, is under the pressure of 49 KPa as shown in the Fig.1. find the velocity of water (V) which leaves the reservoir. P=49 KPa 3m Fig.1arrow_forward
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