Introduction
System model
Selection of motor
Selection of battery bank
Selection of propeller
Modeling of hybrid energy system components
Sizing of PV modules and batteries
Mathematical model of diesel generator
Mathematical model of charge controller
Mathematical model of battery bank
Objective function
Techno-financial feasibility analysis
Net present cost (NPC)
Renewable fraction
Levelized cost of energy (COE)
Sensitivity analysis
HOMER simulation
Energy resource
PV model
Battery model
DEG model
System economics and constraint
Rectifier model
Structure of boat
Numerical results and discussion
PV | DEG | Battery | Rectifier (kW) |
\(C_i\)
| NPC |
\(\digamma\)
| Diesel (L) | DEG (h) |
---|---|---|---|---|---|---|---|---|
0.6 | 1 | 4 | 1 | $770 | $4102 | 0.61 | 279 | 1423 |
0.6 | 1 | 0 | 1 | $590 | $15,085 | 0.27 | 1383 | 8697 |
Components |
\(C_\text {c}\)
|
\(A_\text {c}\)
|
\(A_\text {r}\)
|
\(A_\text {f}\)
|
\(A_\text {T}\)
|
---|---|---|---|---|---|
PV | 226 | 17.7 | 0 | 0 | 18 |
DEG | 334 | 26.1 | 34.7 | 170.9 | 232 |
Battery | 180 | 14.1 | 28.7 | 0 | 43 |
Rectifier | 90 | 2.3 | 0.8 | 0 | 3 |
Total | 830 | 60.3 | 64.2 | 170.9 | 321 |
Avoided cost of energy | $/L | 0.4 |
GHG emission reduction credit | $/tCO\(_2\)
| 2.0 |
GHG reduction credit duration | year | 25 |
GHG credit escalation rate | % | 2 |
Avoided cost of capacity | $/kW-year | 120 |
Energy cost escalation rate | % | 6 |
Inflation | % | 2 |
Discount rate | % | 6 |
Project life | year | 25 |
Pollutant | Emission (kg/Ye) from Case A | Emission (kg/Ye) from Case B |
---|---|---|
Carbon dioxide | 734 | 2134 |
Carbon mono-oxide | 1.813 | 2.341 |
Unburned hydro carbon | 0.201 | 0.511 |
Particulate matter | 0.1367 | 0.165 |
Sulfur dioxide | 1.475 | 4.484 |
Nitrogen oxides | 16.8 | 48.0 |
DEG unit cost | NPC ($) | COE ($/kWh) |
\(f_{\text {ren}}\)
| DEG (L) |
---|---|---|---|---|
0.4 | 2941 | 0.165 | 0.59 | 379 |
0.7 | 4102 | 0.23 | 0.61 | 279 |
0.8 | 4474 | 0.25 | 0.61 | 272 |
0.9 | 4853 | 0.272 | 0.61 | 266 |
Length of hull | 0.5 m |
Wetted area of hull | 2.2 m\(^2\)
|
Speed | 2 m/s |
Ditto | 7.2 km/h |
Ditto | 3.88 Kts |
Reynold’s number | 1,000,000 |
Coefficient of drag | 0.0051 |
Drag | 23 N
|
Propulsive power | 46 W |
Eta propeller | 90 \(\%\)
|
Eta motor | 90 \(\%\)
|
Eta motor controller | 98 \(\%\)
|
Battery voltage | 24 V |
Current | 9 A |
Cable power loss | 3 W |
Eta cable | 97.4 \(\%\)
|
Electrical power (motor) | 56 W |
Electrical power (battery) | 114 W |
Intelligent-assisting system (IAS)
-
charge controller (for controlling the charging of battery by the hybrid source);
-
ignition Controller (for controlling the initial motor torque);
-
boat submergence depth information (to determine the safety level of the boat);
-
sensor module (for additional sensory information);
-
GPS module (for the acquisition of location information);
-
network interface (for accessing wireless network);
-
visualization module (for displaying critical system parameters);
-
voice synthesis (for alarm purpose by auditory mean);
-
visual alarm (for alarm purpose by visual mean).