Given the below results from the rocket propellant simulator:
http://rocketworkbench.sourceforge.net/equil.phtml
We have an air+methane+water fuel mixture rocket expelling droplets of
liquid water travelling at 1305m/s with a Carnot efficiency of about 70%.
If you take two such rocket engines and put them in place of the water
droplets of a Lord Kelvin's Thunderstorm, you have would would appear to be
an electrohydrodynamic DC power station with the following rather
characteristics:
* very high voltage
* high power to weight
* reasonably efficient
* burns a fuel that is cheap for at least the next several years
* NOx in sub-ppm as the only pollutant other than CO2 (which is a green
house gas)
* might even be used as water treatment.
* the only moving parts are the compressors
* very little touble with cooling capacity given the H2O mass flow rate
* with additional downstream equipment might be tuned to treat water as a
side job
Sorry for the cross-post to vortex-l as well as arocket but this is up
Beatty's (vortex-l's) alley and certainly involves small scale liquid
rocketry.
Results
Propellant composition
Code Name mol Mass (g) Composition
976 WATER 512.0000 9223.8235 2H 1O
578 METHANE 55.0000 882.3353 1C 4H
15 AIR (DRY AT SEA LEVEL) 1.0000 15479.2332 835N 224O 5AR
Density : 2.261 g/cm^3
5 different elements
H O C N AR
Total mass: 25585.392031 g
Enthalpy : -5907.12 kJ/kg
149 possible gazeous species
3 possible condensed species
CHAMBER THROAT EXIT
Pressure (atm) : 100.000 54.524 1.000
Temperature (K) : 851.960 741.912 273.659
H (kJ/kg) : -5907.117 -6079.928 -6758.571
U (kJ/kg) : -6212.081 -6345.499 -6856.528
G (kJ/kg) : -13075.582 -12322.436 -9061.163
S (kJ/(kg)(K) : 8.414 8.414 8.414
M (g/mol) : 23.228 23.228 23.228
(dLnV/dLnP)t : -1.00000 -1.00000 -1.00000
(dLnV/dLnT)p : 1.00000 1.00000 1.00000
Cp (kJ/(kg)(K)) : 1.59515 1.54548 1.37312
Cv (kJ/(kg)(K)) : 1.23719 1.18752 1.01517
Cp/Cv : 1.28933 1.30143 1.35261
Gamma : 1.28933 1.30143 1.35261
Vson (m/s) : 627.05454 587.89672 355.38692
Ae/At : 1.00000 9.06046
A/dotm (m/s/atm) : 8.28502 75.06605
C* (m/s) : 828.50159 828.50159
Cf : 0.70959 1.57508
Ivac (m/s) : 1039.62801 1380.02098
Isp (m/s) : 587.89672 1304.95492
Isp/g (s) : 59.94878 133.06837
Molar fractions
Ar 4.5393e-03 4.5393e-03 4.5393e-03
CO2 4.9932e-02 4.9932e-02 4.9932e-02
H2O 5.6468e-01 5.6468e-01 5.6468e-01
NO 2.9860e-07 2.9860e-07 2.9860e-07
NO2 5.0825e-08 5.0825e-08 5.0825e-08
N2 3.7903e-01 3.7903e-01 3.7903e-01
O2 1.8155e-03 1.8155e-03 1.8155e-03
