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Research Papers

Short-Duration Performance Acceptance Test of Parabolic Trough Solar Field: A Case Study

[+] Author and Article Information
Ali Elmaihy

Department of Power Engineering,
Military Technical College,
Cairo 11838, Egypt
e-mail: ali.elmaihy@mtc.edu.eg

Ahmed El Weteedy

Department of Power Engineering,
Military Technical College,
Cairo 11838, Egypt
e-mail: aelweteedy@mtc.edu.eg

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 April 23, 2017; final manuscript received July 21, 2017; published online August 22, 2017. Assoc. Editor: Gerardo Diaz.

J. Sol. Energy Eng 139(5), 051010 (Aug 22, 2017) (9 pages) Paper No: SOL-17-1152; doi: 10.1115/1.4037383 History: Received April 23, 2017; Revised July 21, 2017

Extensive solar field performance testing is often required as part of the plant commissioning process in order to ensure that actual solar field performance satisfies both technical specifications and performance guarantees between the involved parties. In this study, short duration (15 min) steady state performance acceptance test for Kuraymat integrated solar combined cycle (ISCC) solar field was carried out in agreement with the general guidelines of the earlier National Renewable Energy Laboratory (NREL) report on parabolic trough (PT) collector fields (Kearney, 2011, “Utility-Scale Parabolic Trough Solar Systems—Performance Acceptance Test Guidelines,” National Renewable Energy Laboratory, Golden, CO, NREL Report No. SR-5500-48895 and Kearney, 2010, “Development of Performance Acceptance Test Guidelines for Large Commercial Parabolic Trough Solar Fields,” National Renewable Energy Laboratory, Golden, CO, NREL Report No. SR-5500-49367) which is in full agreement with the plant documentations provided by FLAGSOL (2010, “Specification: Performance Test Procedure. Plant Documentations,” Customer Doc-ID: KU1-FLG-000-QP-M-001). This work includes measurement of the thermal power output of PT system under clear sky conditions over a short period during which thermal steady state conditions exist. The methodology of the solar field testing is presented while a special consideration is provided for the model formulation and uncertainty associated with the measured data. The measured results together with the associated uncertainties were compared with model predictions. All tests for both northern and a southern collector subfields that satisfy the test conditions are accepted based on acceptance test evaluation criteria.

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References

Figures

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Fig. 1

Schematic diagram of Kuraymat ISCC solar field

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Fig. 2

Direct normal irradiation measured at Kuraymat ISCC on Aug. 12, 2013, during the test period

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Fig. 3

Dry bulb temperature and wind velocity at Kuraymat ISCC on Aug. 12, 2013, during the test period

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Fig. 4

Measured HTF temperatures at inlet and outlet of the Southern subfield for Aug. 12, 2013, during the test period

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Fig. 5

Measured HTF mass flow rate of the Southern subfield at Kuraymat ISCC for Aug. 12, 2013, during the test period

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Fig. 6

Thermal power output predicted by the model as compared to measured thermal output for Aug. 12, 2013

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Fig. 7

Solar field parasitic power consumption predicted by the model as compared to measured parasitic power for Aug. 12, 2013

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