70
V. Nawandar et al.
differently. To calculate the payback period, both the improvements are collectively
and differently stated.
i. Solar PV Calculations
Similar to the analysis of Mode 1, this analysis is done using RETScreen as
discussed below.
To generate 22 MWh of electricity in one year, poly-Si-based solar PV is
suggested. Fifty-six solar PV panels of 235 W each will be required. The power
rating of the panels together is 13.16 kW, with 14.1% efficiency as specified in
Table 14.
The total investment of solar PV panels is around Rs. 855,400. The annual electricity export income is expected to be Rs. 163,185, and the annual GHG savings is
around 26 tCO 2 equivalent. With the total life expectancy of 20 years, total GHG
savings are expected to be 524 tCO 2 equivalents, as shown in Table 15. Similar to
Mode 1, with 18.3% of IRR, the simple payback period is expected to be 5.3 years
for the solar PV-based energy input.
ii. LPG Calculations
The LPG-based results are similar to the Mode 2 results. Individually, LPG-based
setup with the capital investment of approximately Rs. 60,000 gives annual savings
of about Rs. 53,153.2/year. This gives the simple payback period of 1.15 years. The
annual GHG savings by LPG are estimated to be around 30.7 tCO 2 /year.
Table 14 Basic details of
solar PV cells (Mode 3)
Type of solar PV
Poly-SI
Model (manufacturer)
Poly-SI-TSM-PC05 (Trina Solar)
Efficiency (%)
14.4
Nominal operating
temperature (°C)
45
Power capacity/panel (W) 235
Power capacity (kW)
13.16
Number of panels
56
Total electricity exported
(MWh)
22.082
Solar collector area (m 2 )
93
Table 15 Economic analysis
of solar PV (Mode 3)
Total investment
Rs. 855,400
Electricity export rate
Rs. 7390/MWh
Yearly savings from electricity export
Rs. 163,185
Payback period
5.3 years
GHG savings per year
26 tCO 2
GHG savings over the life of the project
524 tCO 2
V. Nawandar et al.
differently. To calculate the payback period, both the improvements are collectively
and differently stated.
i. Solar PV Calculations
Similar to the analysis of Mode 1, this analysis is done using RETScreen as
discussed below.
To generate 22 MWh of electricity in one year, poly-Si-based solar PV is
suggested. Fifty-six solar PV panels of 235 W each will be required. The power
rating of the panels together is 13.16 kW, with 14.1% efficiency as specified in
Table 14.
The total investment of solar PV panels is around Rs. 855,400. The annual electricity export income is expected to be Rs. 163,185, and the annual GHG savings is
around 26 tCO 2 equivalent. With the total life expectancy of 20 years, total GHG
savings are expected to be 524 tCO 2 equivalents, as shown in Table 15. Similar to
Mode 1, with 18.3% of IRR, the simple payback period is expected to be 5.3 years
for the solar PV-based energy input.
ii. LPG Calculations
The LPG-based results are similar to the Mode 2 results. Individually, LPG-based
setup with the capital investment of approximately Rs. 60,000 gives annual savings
of about Rs. 53,153.2/year. This gives the simple payback period of 1.15 years. The
annual GHG savings by LPG are estimated to be around 30.7 tCO 2 /year.
Table 14 Basic details of
solar PV cells (Mode 3)
Type of solar PV
Poly-SI
Model (manufacturer)
Poly-SI-TSM-PC05 (Trina Solar)
Efficiency (%)
14.4
Nominal operating
temperature (°C)
45
Power capacity/panel (W) 235
Power capacity (kW)
13.16
Number of panels
56
Total electricity exported
(MWh)
22.082
Solar collector area (m 2 )
93
Table 15 Economic analysis
of solar PV (Mode 3)
Total investment
Rs. 855,400
Electricity export rate
Rs. 7390/MWh
Yearly savings from electricity export
Rs. 163,185
Payback period
5.3 years
GHG savings per year
26 tCO 2
GHG savings over the life of the project
524 tCO 2