Engineering, 24.03.2020 18:01 texassaint797
Liquid flows at steady state at a rate of 2 lb/s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. The liquid specific enthalpy at the inlet is 40.09 Btu/lb and at the exit is 40.94 Btu/lb. The pump requires 3 Btu/s of power to operate. If kinetic energy effects are negligible and gravitational acceleration is 32.174 ft/s2, the heat transfer rate associated with this steady state process is most closely:
A) 2.02 Btu/s from the liquid to the surroundings.
B) 3.98 Btu/s from the surroundings to the liquid.
C) 4.96 Btu/s from the surroundings to the liquid.
D) 1.04 Btu/s from the liquid to the surroundings.
Answers: 2
Btu/lb)
Btu/lb)
)
)
= 3 Btu/s![Q_{cv}-W{cv}+m[(h_1-h_2)+(\frac{V_1^2-V_2^2}{2})+g(z_1-z_2)]=0](/tpl/images/0561/0359/16e63.png)
![Q_{cv}-W{cv}+m[(h_1-h_2)+g(z_1-z_2)]=0](/tpl/images/0561/0359/3924d.png)
![Q_{cv}-(-3)+2[(40.09-40.94)+\frac{32.174(0-100)}{778*32.174} ]=0\\Q_{cv}+3+2[-0.85-0.1285 ]=0\\Q_{cv}+3+2(-0.9785)=0\\Q_{cv}+3-1.957=0\\Q_{cv}+1.04=0\\Q_{cv}=-1.04\\](/tpl/images/0561/0359/ef0f5.png)
Other questions on the subject: Engineering
Engineering, 04.07.2019 18:10, yasminothman02
An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet
Answers: 3
Engineering, 04.07.2019 18:10, skpdancer1605
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
Engineering, 04.07.2019 18:20, ashleyjaslin
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
Answers: 3
You know the right answer?
Liquid flows at steady state at a rate of 2 lb/s through a pump, which operates to raise the elevati...
Questions in other subjects:
Biology, 14.01.2020 04:31
Mathematics, 14.01.2020 04:31
Computers and Technology, 14.01.2020 04:31
Mathematics, 14.01.2020 04:31
