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Modeling and optimization of photovoltaic serpentine type thermal solar collector with thermal energy storage system for hot water and electricity generation for single residential building

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Abstract

Increasing surface temperature has a significant effect on the electrical performance of photovoltaic (PV) panels. A closed-loop forced circulation serpentine tube design of cooling water system was used in this study for effectively management of the surface temperature of PV panels. A real-time experiment was first carried out with a PV panel with a cooling system at heat transfer fluid (HTF) flow rates of 60 kg h−1, 120 kg h−1, and 180 kg h−1. Based on the experimentation, a correlation for a nominal operating cell temperature (NOCT) and thermal efficiency for collector was developed for experimental validation of useful energy gained, cell temperature, and electric power generation. The developed correlations were validated with the use of electric power electrical power and useful energy gained in photovoltaic serpentine thermal solar collector (PV/STSC) and fitting into the experimental results with a deviation of 1% and 2.5% respectively. Further, with the help of developed correlations, a system was developed in the TRNSYS tool through which an optimization study was performed based on electric and hot water demand. The findings indicated an optimal system with an 8-m2 PV/STSC area, a HTF flow rate of 60 kg h−1, and thermal energy storage (TES) system having a volume and height of 280 l and 0.8 m could meet 91% and 33% of the hot water demand for Ac loads and 78% or DC loads, respectively.

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Data availability

The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

HTF :

Heat transfer fluid

NOCT:

Nominal operating cell temperature

PV/STSC:

Photovoltaic serpentine thermal solar collector

TES:

Thermal energy storage

F R :

Heat removal factor

τ:

Transmissivity

α:

Absorptivity

A p :

Aperture area (m2)

G t :

Incident solar radiation (W m−2)

U t :

Overall heat loss coefficient (W m−2 K−1)

T i :

Inlet temperature (K)

T a :

Ambient temperature (K)

U L :

Overall heat loss coefficient from the solar collector (W m−2 K−1)

Q s :

Energy supplied by the TES system (W)

Q AUX :

Auxiliary heater’s additional energy (W)

Q max :

Electric heater maximum heating rate (W)

UA:

Overall loss coefficient between the heater and its surroundings during operation (W/m2K)

ηhtr:

Auxiliary heater efficiency

C f :

Specific heat of the fluid (kJ/kg K)

p peak :

Peak power in the solar panel (W)

GTavg :

Average solar radiation in a day (W m−2

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Authors and Affiliations

Authors

Contributions

Conceptualization: S. Christopher and B Srimanickam; methodology: S. Christopher and B Srimanickam; formal analysis: A Saranya and M Metilda. Writing original draft preparation: S. Christopher, B Srimanickam A Saranya, and M Metilda; Writing reviews: A Saranya and M Metilda; supervision: S. Christopher.

Corresponding author

Correspondence to Christopher Sathiya Satchi.

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The authors declare no competing interests.

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Baskaran, S., Satchi, C.S., Amirtharajan, S. et al. Modeling and optimization of photovoltaic serpentine type thermal solar collector with thermal energy storage system for hot water and electricity generation for single residential building. Environ Sci Pollut Res 29, 59575–59591 (2022). https://doi.org/10.1007/s11356-022-19957-7

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  • DOI: https://doi.org/10.1007/s11356-022-19957-7

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