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Analysis on the feasibility of a PV-diesel generator hybrid system without energy storage

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Abstract

A sustainable option in the mandatory use of diesel generator set (DG) is its integration into the solar photo-voltaic system (PV). A major issue, in this integration, is achieving an optimum mix of energy delivered by DG as well as that obtainable from PV. This paper determines the optimum mix of outputs from a PV and the DG on the basis of minimum cost of energy in Rs/kWh. A time step simulation-based methodology is adopted. Results indicate, if 70 % of the annual energy demand is met by DG while remaining 30 % is met by the PV, the cost of energy will be the least at 13.1 Rs/kWh. Sensitivity of the optimum mix is examined in the light of relevant parameters.

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Abbreviations

A :

Fuel curve coefficient, l/kWh

A m :

Peak current rating of a module (A)

A p :

Peak current rating of a PV array (A)

ALCC:

Annualized life cycle cost (Rs/year)

AOM:

Annual operation and maintenance cost (Rs/year)

AFC:

Annual fuel cost (Rs/year)

B :

Fuel curve coefficient of diesel generator (l/kWh)

COE:

Cost of energy (Rs/kWh)

C 0 :

Capital cost of component (Rs)

CRF:

Capital recovery factor (year−1)

D :

Discount rate (%)

N :

Life of equipment (year)

E dem :

Annual energy requirement (kWh)

FF:

Fill factor

G :

Global irradiance (kW/m2)

G std :

Standard global irradiance (kW/m2)

I sc :

Short circuit current at test conditions (A)

\(I_{\text{sc}}^{{\prime }}\) :

Short circuit current at given irradiance (A)

I m :

Current corresponding to maximum power point (A)

L :

Demand load (kW)

L 1 :

Load energy requirement per day (Wh/day)

L 2 :

Rating of the inverter (kW)

L 3 :

Daily average Ah supplied by the PV array (Ah/day)

N :

Number of modules

NOCT:

Nominal operating cell temperature (°C)

N p :

Number of modules in parallel

N s :

Number of modules in series

OF:

Overload factor of the inverter

P dg :

Power output from diesel generator (kW)

P dg_r :

Rated capacity of diesel generator

P pv :

Power output from PV array (kW)

P du :

Power dumped (kW)

S p :

Peak sunshine hours per day (h)

t :

Time (h)

T :

Total time period (time horizon) (h)

V m :

Voltage corresponding to maximum power point (V)

V l :

Load voltage (V)

V oc :

Open circuit voltage (V)

\(V_{\text{oc}}^{{\prime }}\) :

Open circuit voltage at given irradiance (V)

T a :

Ambient temperature (°C)

T c :

Cell temperature (°C)

ΔFC:

Differential fuel consumption (l)

ΔE du :

Differential energy dumped (kWh)

η i :

Efficiency of inverter

DG:

Diesel generator

PV:

Solar PV

LF:

Load Factor

CL:

Connected Load

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Authors and Affiliations

  1. Department of Mechanical Engineering, Pimpri-Chinchwad College of Engineering, Pune, 411007, India

    Anindita Roy

  2. Mechanical Engineering Department, College of Engineering Pune, Pune, India

    Govind N. Kulkarni

Authors
  1. Anindita Roy
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  2. Govind N. Kulkarni
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Correspondence to Govind N. Kulkarni.

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Roy, A., Kulkarni, G.N. Analysis on the feasibility of a PV-diesel generator hybrid system without energy storage. Clean Techn Environ Policy 18, 2541–2553 (2016). https://doi.org/10.1007/s10098-015-1070-2

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  • DOI: https://doi.org/10.1007/s10098-015-1070-2

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