Design of floating solar PV system for typical household on Debre Mariam Island

Figures & data

Figure 1. Location map of Debre Mariam Island.

Table 1. Monthly average daily insolation incident on horizontal surface (kWh/m²/day) of Bahir Dar

Lat 11.5742°N Lon 37.3614°E	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual average
20 years average	6.4	6.7	7.0	6.9	6.6	5.6	4.6	4.8	6.03	6.6	6.4	6.1	6.14

Table 2. Maximum daily temperature (°C) of Bahir Dar

Lat 11.5742°N Lon 37.3614°E	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual average
20 years average	29	31	32	32	32	29	26	25	26	27	28	28	28.75

Table 3. Monthly average wind speed (m/s) at Bahir Dar

Lat 11.5742°N Lon 37.3614°E	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual average
20 years average	6.64	7.1	7.14	7.36	7.3	7.34	6.12	5.74	5.98	6.5	6.7	6.7	6.72

Table 4. Daily load demand of single households with low income

Appliance	Quantity	Power rating (W)	Hours/day	Peak load (W)	Daily use of electricity (Wh per day)
Lighting	3	11	5	33	165
Tape/radio	1	14	2	14	28
TV set	1	60	4	60	240
Mobile charger	1	4	4	4	16
Stove	1	1000	3	1000	3000
Sub total				1,111	3,449
Total (250 household)				277,750	862,250

Table 5. Daily load demand of single households with high income

Appliance	Quantity	Power rating (W)	Hours/day	Peak load (W)	Daily use of electricity (Wh per day)
Lighting	3	11	5	33	165
Tape/radio	1	14	2	14	28
TV set	1	60	4	60	240
Mobile charger	1	4	5	4	20
Fan	1	3	4	3	12
Stove	1	2000	4	2000	8000
Refrigerator	1	132	24	132	3168
Sub total				2,246	11,633
Total (50 household)				112,300	581,650

Table 6. Daily load demand of Saint Mariam Monastery

Appliance	Quantity	Power rating (W)	Hours/day	Peak load (W)	Daily use of electricity (Wh per day)
Lighting	6	11	6	66	396
Microphone	1	55	10	55	550
Total				121	946

Table 7. Daily load demand of Water pump for drinking

Appliance	Quantity	Power rating (W)	Hours/day	Peak load (W)	Daily use of electricity (Wh per day)
Water pump	3	960	6	2880	17,280
Total				2,880	17,280

Table 8. Daily load demand of health post

Appliance	Quantity	Power rating (W)	Hours/day	Peak load (W)	Daily use of electricity (Wh per day)
Lighting	6	11	6	66	396
Refrigerator	1	200	12	200	2400
Total				266	2,796

Table 9. Daily load demand of school

Appliance	Quantity	Power rating (W)	Hours/day	Peak load (W)	Daily use of electricity (Wh per day)
Lighting for office and classroom	15	11	4	165	660
Mobile charger	4	4	2	16	32
Tape/radio	6	14	4	84	336
Desktop Computer	2	55	8	110	880
Photocopy machine	1	185	5	185	925
Printer	1	77	3	77	231
Total				637	3,064

Table 10. Solar photovoltaic specification

Module type	HCP78X9-400 W
Maximum power $P_{max}$	400W
Open-circuit voltage $V_{oc}$	51.6 V
Maximum power voltage $V_{mp}$	42.0 V
Short-circuit current $I_{sc}$	9.95A
Maximum power current $I_{mp}$	9.53A
Module efficiency (%)	18.38%
Power tolerance	0~+5 W
Temperature coefficient of $I_{sc}$	0.05%/^oC
Temperature coefficient of $V_{oc}$	−0.31%/^oC
Temperature coefficient of $P_{max}$	−0.38%/^oC
Standard test environment	Irradiance 1000 W/m^2, cell temperature 25°C, Spectrum AM 1.5

Figure 2. MATLAB/Simulink model of floating PV system.

Figure 3. Output power on land.

Figure 4. Output power at water surface.

Availability of data and materials

All data generated or analyzed during this study are included in this published article.