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Development of a hybrid solar thermal power plant with new collector field, and its thermal and exergy analyses

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Journal of the Brazilian Society of Mechanical Sciences and Engineering Aims and scope Submit manuscript

Abstract

In the present study, a hybrid solar thermal power plant (STPP) developed with a new LS-3 collector is introduced and analyzed by the exergy analysis. The results are compared with a hybrid STPP in the base case. Energy and exergy analyses are also carried out to understand the performance of the solar fields. In the developed system design, a new parabolic trough collector field is added to increase the temperature of generated steam entering the steam turbine. The analysis of results for the solar fields shows that the energy and exergy losses in the collector–receiver subsystem of the Therminol VP-1 oil collector field are more than the other subsystems. The maximum exergy destruction of the system occurs in the auxiliary boiler and then in the solar collectors’ fields. Also, comparative results of the newly developed system with the base case show that exergy destruction decreases from 6.61 MW to 3.1 MW, and exergy efficiency increases from 7% to 11.97% for developed STPP with LS-3 collectors and STPP in the form of the base case, respectively.

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Abbreviations

A:

Area (\({\text{m}}^{2}\))

\({\text{C}}_{{\text{p}}}\) :

Specific heat (kJ/kg K)

e:

Specific exergy (kJ/kg)

\({\dot{\text{E}}}\) :

Exergy rate (MW)

\({\text{e}}_{{\text{k}}}^{{{\text{ch}}}}\) :

Standard chemical exergy rate of kth component

H:

Specific enthalpy (kJ/kg)

IR:

Irreversibility (MW)

I:

Solar intensity (W/\({\text{m}}^{2}\))

K:

Thermal conductivity (W/mK)

L:

Length (m)

\({\dot{\text{m}}}\) :

Mass flow rate (kg/sec)

N:

Number of collectors

P:

Pressure (bar)

\({\dot{\text{Q}}}\) :

Heat transfer rate (MW)

R:

Gas constant (kJ/kg K)

\({\text{R}}_{{\text{b}}}\) :

Geometric factor

s:

Specific entropy (kJ/kg K)

T:

Temperature (°C)

W:

Work (kJ)

\({\dot{\text{W}}}\) :

Work rate (MW)

\({\text{W}}_{0}\) :

Aperture (m)

x:

Molar fraction

\({\upalpha }\) :

Absorptivity of absorber

\({\upvarepsilon }\) :

Exergy efficiency

\({\upeta }_{^\circ }\) :

Optical efficiency

\({\upeta }\) :

Energy efficiency

\({\uptheta }\) :

Angle of incidence

\({\uptheta }_{{\text{z}}}\) :

Zenith angle

\(\rho\) :

Density (\({\text{m}}^{3}\)/kg)

\({\uptau }\) :

Transmissivity of cover

\(\phi\) :

Ratio of fuel chemical exergy to lower heat value

0:

Dead state

a:

Ambient

b:

Beam

c:

Collector

ch:

Chemical

D:

Destruction

F:

Fuel

f:

Fluid

i:

Inlet

k:

Component

L:

Loss

o:

Outlet

P:

Product

ph:

Physical

Q:

Heat transfer

r:

Receiver

s:

Solar/absorber

u:

Useful

w:

Work

DE:

Dish/engine system

CHP:

Combined heat and power

CRS:

Central receiver

CSP:

Concentrating solar power

CRS:

Central receiver system

LF:

Linear Fresnel

LHV:

Lower heating value (kJ/kg)

LS-3:

Luz system three

SLT:

Second law of thermodynamics

SRC:

Steam Rankine cycle

STPP:

Solar thermal power plant

ORC:

Organic Rankine cycle

PTC:

Parabolic trough collector

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Funding

The authors have no financial or proprietary interests in any material discussed in this article.

Author information

Authors and Affiliations

  1. Engineering School, West Tehran Islamic Azad University, Tehran, Iran

    Elahe Javadzadeh

  2. Mechanical and Aerospace Engineering Department, School of Engineering, Garmsar branch, Islamic Azad University, Garmsar, Iran

    Ali Baghernejad

Authors
  1. Elahe Javadzadeh
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  2. Ali Baghernejad
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Contributions

AB presented, designed and analyzed the study. EJ performed the exergy analysis and organized the results and wrote the first draft of the manuscript. AB and EJ contributed to manuscript revision, and read and approved the submitted version.

Corresponding author

Correspondence to Ali Baghernejad.

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The data that support the findings of this study are available from the corresponding author, upon reasonable request.

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All code for data analysis associated with the current submission is available.

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Technical Editor: Monica Carvalho.

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Javadzadeh, E., Baghernejad, A. Development of a hybrid solar thermal power plant with new collector field, and its thermal and exergy analyses. J Braz. Soc. Mech. Sci. Eng. 44, 91 (2022). https://doi.org/10.1007/s40430-022-03359-4

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