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Research Papers

Thermodynamic Performance Evaluation of a Solar Parabolic Dish Assisted Multigeneration System

[+] Author and Article Information
Muhammad Abid

Faculty of Engineering,
Department of Energy Systems Engineering,
Cyprus International University,
North Cyprus via Mersin 10,
Nicosia 10000, Turkey
e-mail: mabid@ciu.edu.tr

Muhammad Sajid Khan

Department of Mechanical Engineering,
Mirpur University of Science & Technology (MUST),
Mirpur, 10250 AJK, Pakistan
e-mail: engr.sajidazam@yahoo.com

Tahir Abdul Hussain Ratlamwala

Department of Mechanical Engineering,
National University of Sciences and Technology,
Islamabad 24090, Pakistan
e-mail: ratlamwala.tahir@gmail.com

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering: Including Wind Energy and Building Energy Conservation. Manuscript received July 20, 2018; final manuscript received June 11, 2019; published online June 28, 2019. Assoc. Editor: Aranzazu Fernandez Garcia.

J. Sol. Energy Eng 141(6), 061014 (Jun 28, 2019) (10 pages) Paper No: SOL-18-1329; doi: 10.1115/1.4044022 History: Received July 20, 2018; Accepted June 12, 2019

The concentration ratio of the parabolic dish solar collector (PDSC) is considered to be one of the highest among the concentrated solar power technologies (CSPs); therefore, such system is capable of generating more heat rate. The present paper focuses on the integration of the PDSC with the combined cycle (gas cycle as the toping cycle and steam cycle as the bottoming cycle) along with the utilization of waste heat from the power cycle to drive the single effect lithium bromide/water absorption cycle. Molten salt is used as a heat transfer fluid in the solar collector. The engineering equation solver (EES) is employed for the mathematical modeling and simulation of the solar integrated system. The various operating parameters (beam radiation, inlet and ambient temperatures of heat transfer fluid, mass flow rate of heat transfer fluid, evaporator temperature, and generator temperature) are varied to analyze their influence on the performance parameters (power output, overall energetic and exergetic efficiencies, outlet temperature of the receiver, and as coefficient of performance (COP) and exergy efficiencies) of the integrated system. The results show that the overall energy and exergy efficiencies are observed to be 39.9% and 42.95% at ambient temperature of 27 °C and solar irradiance of 1000 W/m2. The outlet temperature of the receiver is noticed to decrease from 1008 K to 528 K for an increase in the mass flow rate from 0.01 to 0.05 kg/s. The efficiency rate of the power plant is 38%, whereas COP of single effect absorption system is 0.84, and it will decrease from 0.87 to 0.79. However, the evaporator load is decreased to approximately 9.7% by increasing the generator temperature from 47 °C to 107 °C.

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Figures

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Fig. 1

(a) Solar dish collector with a receiver and (b) cavity receiver of the parabolic dish solar collector

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Fig. 2

(a) Integration of PDSC with the combined power plant cycle along with the single effect absorption refrigeration cycle and (b) T-s diagram of the gas cycle and reheat Rankine cycle

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Fig. 3

Influence of ambient temperature on overall energy and exergy efficiency

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Fig. 4

Effect of ambient temperature on power output and outlet temperature of the receiver

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Fig. 5

Effect of inlet temperature of heat transfer fluid on overall system efficiencies

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Fig. 6

Effect of inlet temperature on heat transfer fluid in the receiver on the outlet temperature and the power output

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Fig. 7

Impact of the mass flow rate of heat transfer fluid on integrated system efficiencies

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Fig. 8

Effect of the mass flow rate of heat transfer fluid on the net work output and the outlet temperature of the receiver

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Fig. 9

DNI effect on overall energy and exergy efficiencies of the system

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Fig. 10

DNI effect on the power output and the evaporator load

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Fig. 11

Effect of generator temperature on COP and overall energy efficiency

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Fig. 12

Effect of evaporator temperature on energetic and exergetic COP of the SE absorption system

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