Answer:d
Explanation:
(d) chain drive belt drive gear drive
Answer:
It should be in Park or Neutral.
Explanation:
A binary geothermal power operates on the simple Rankine cycle with isobutane as the working fluid. The isentropic efficiency of the turbine, the net power output, and the thermal efficiency of the cycle are to be determined
Assumptions :
1. Steady operating conditions exist.
2. Kinetic and potential energy changes are negligible.
Properties: The specific heat of geothermal water (
[) is taken to be 4.18 kJ/kg.ºC.
Analysis (a) We need properties of isobutane, we can obtain the properties from EES.
a. Turbine
P![P_{3} = 3.25mPa = (3.25*1000) kPa\\= 3250kPa\\from the EES TABLE\\h_{3} = 761.54 kJ/kg\\s_{3} = 2.5457 kJ/kg\\P_{4} = 410kPa\\\\s_{4} = s_{3} \\h_{4s} = 470.40kJ/kg\\\\T_{4} = 179.5^{0} C\\\\h_{4} = 689.74 kJ/KG\\\\ The isentropic efficiency, n_{T} = \frac{h_{3}-h_{4} }{h_{3}- h_{4s} }](https://tex.z-dn.net/?f=P_%7B3%7D%20%3D%203.25mPa%20%3D%20%283.25%2A1000%29%20kPa%5C%5C%3D%203250kPa%5C%5Cfrom%20the%20EES%20TABLE%5C%5Ch_%7B3%7D%20%3D%20761.54%20kJ%2Fkg%5C%5Cs_%7B3%7D%20%3D%202.5457%20kJ%2Fkg%5C%5CP_%7B4%7D%20%3D%20410kPa%5C%5C%5C%5Cs_%7B4%7D%20%3D%20s_%7B3%7D%20%5C%5Ch_%7B4s%7D%20%3D%20470.40kJ%2Fkg%5C%5C%5C%5CT_%7B4%7D%20%3D%20179.5%5E%7B0%7D%20C%5C%5C%5C%5Ch_%7B4%7D%20%3D%20689.74%20kJ%2FKG%5C%5C%5C%5C%20The%20%20isentropic%20%20efficiency%2C%20n_%7BT%7D%20%3D%20%5Cfrac%7Bh_%7B3%7D-h_%7B4%7D%20%20%7D%7Bh_%7B3%7D-%20h_%7B4s%7D%20%7D)
=![=\frac{761.54-689.74}{761.54-670.40} \\=\frac{71.8}{91.14} \\=0.788](https://tex.z-dn.net/?f=%3D%5Cfrac%7B761.54-689.74%7D%7B761.54-670.40%7D%20%5C%5C%3D%5Cfrac%7B71.8%7D%7B91.14%7D%20%5C%5C%3D0.788)
b. Pump
![h_{1} = h_{f} @ 410kPa = 273.01kJ/kg\\v_{1} = v_{f} @ 410kPa = 0.001842 m^{3}/kgw_{p,in} = \frac{v_{1}(P_{2}-P_{1}) }{n_{p} } \\\\= \frac{0.01842(3250-410)}{0.9} \\\\ =5.81kJ/kg\\h_{2} =h_{1} + w_{p,in}\\ = 273.01+5.81\\ = 278.82 kJ/kg\\\\w_{T,out} = m^{.} (h_{3} -h_{4} )\\=(305.6)(761.54-689.74)\\=305.6(71.8)\\=21,942kW\\\\](https://tex.z-dn.net/?f=h_%7B1%7D%20%3D%20h_%7Bf%7D%20%40%20410kPa%20%3D%20273.01kJ%2Fkg%5C%5Cv_%7B1%7D%20%3D%20v_%7Bf%7D%20%40%20410kPa%20%3D%200.001842%20m%5E%7B3%7D%2Fkgw_%7Bp%2Cin%7D%20%3D%20%20%5Cfrac%7Bv_%7B1%7D%28P_%7B2%7D-P_%7B1%7D%29%20%20%20%7D%7Bn_%7Bp%7D%20%7D%20%5C%5C%5C%5C%3D%20%5Cfrac%7B0.01842%283250-410%29%7D%7B0.9%7D%20%5C%5C%5C%5C%20%3D5.81kJ%2Fkg%5C%5Ch_%7B2%7D%20%3Dh_%7B1%7D%20%2B%20w_%7Bp%2Cin%7D%5C%5C%20%20%20%20%20%20%20%20%20%20%3D%20273.01%2B5.81%5C%5C%20%20%20%20%20%20%20%20%20%20%20%3D%20278.82%20kJ%2Fkg%5C%5C%5C%5Cw_%7BT%2Cout%7D%20%3D%20m%5E%7B.%7D%20%20%28h_%7B3%7D%20-h_%7B4%7D%20%29%5C%5C%3D%28305.6%29%28761.54-689.74%29%5C%5C%3D305.6%2871.8%29%5C%5C%3D21%2C942kW%5C%5C%5C%5C)
![W^{.} _ {P,in} = m^{.} (h_{2} -h_{1}) \\=m^{.} w_{p,in \\=305.6(5.81)\\\\=1,777kW\\W^{.} _{net} = W^{.} _{T, out} - W^{.} _{P,in} \\= 21,942-1,777\\=20,166 kW\\\\HEAT EXCHANGER\\\\Q_{in} = m^{.} _{geo} c_{geo} (T_{in-T_{out} } )\\=555.9(4.18)(160-90)\\=162.656kW\\](https://tex.z-dn.net/?f=W%5E%7B.%7D%20_%20%7BP%2Cin%7D%20%3D%20m%5E%7B.%7D%20%28h_%7B2%7D%20-h_%7B1%7D%29%20%5C%5C%3Dm%5E%7B.%7D%20%20w_%7Bp%2Cin%20%5C%5C%3D305.6%285.81%29%5C%5C%5C%5C%3D1%2C777kW%5C%5CW%5E%7B.%7D%20%20_%7Bnet%7D%20%3D%20W%5E%7B.%7D%20_%7BT%2C%20out%7D%20-%20W%5E%7B.%7D%20%20_%7BP%2Cin%7D%20%5C%5C%3D%2021%2C942-1%2C777%5C%5C%3D20%2C166%20kW%5C%5C%5C%5CHEAT%20EXCHANGER%5C%5C%5C%5CQ_%7Bin%7D%20%3D%20m%5E%7B.%7D%20_%7Bgeo%7D%20c_%7Bgeo%7D%20%28T_%7Bin-T_%7Bout%7D%20%7D%20%29%5C%5C%3D555.9%284.18%29%28160-90%29%5C%5C%3D162.656kW%5C%5C)
c. ![The thermal efficiency of the cycle n_{th} =\frac{W^{.} _{net} }{Q^{._{in} } } \\\\= \frac{20,166}{162,656} \\=0.124\\=12.4%](https://tex.z-dn.net/?f=The%20thermal%20efficiency%20of%20the%20cycle%20%20n_%7Bth%7D%20%20%3D%5Cfrac%7BW%5E%7B.%7D%20_%7Bnet%7D%20%7D%7BQ%5E%7B._%7Bin%7D%20%7D%20%7D%20%5C%5C%5C%5C%3D%20%5Cfrac%7B20%2C166%7D%7B162%2C656%7D%20%5C%5C%3D0.124%5C%5C%3D12.4%25)
They ran different shapes and materials through a wind tunnel to see which shape and material would decrease energy output so that it takes in equal COthan it puts out.