Experimental performance analysis of an improved receiver for Scheffler solar concentrator

Malwad, Dnyaneshwar; Tungikar, Vinod B.

doi:10.1007/s42452-020-03848-y

Cited by 10 publications

(6 citation statements)

References 35 publications

(38 reference statements)

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“…As can be observed, Mekonnen et al [24][25][26] found the overall heat loss factors of 62 W/m 2 K, 109 W/m 2 K, 41.8 W/m 2 K, respectively which were higher than IR system of present study which was found to be 59.65 W/m 2 K. For COR, present study performed well with 0.29 compared to Mekonnen et al [24] who found 0.16. In terms of the first figure of merit, the AFR system for the present study performed well comparing with the IR system, system studied by Mekonnen et al [24] and systems studied by Chandak et al [33].…”

Section: Comparison Of Findings Of Present Work With Similar Studiessupporting

confidence: 58%

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Performance analysis of parabolic dish solar cooking system with improved receiver designs

Theu

Kimambo

2023

Renew. Energy Environ. Sustain.

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Lack of access to clean energy for cooking and heating applications is one of the challenges faced by households in developing countries. Solar cooking is one of the solutions, but suffers low adoption and utilization due to various challenges including technical limitation. This study investigated initiatives on improving the technical viability of parabolic dish solar system used for direct cooking by focusing on the receiver. Three receiver prototypes namely; Insulated, Oil-filled and Air-filled, all incorporated with a base circular ring, were constructed and their performance was compared experimentally with the conventional receiver. The maximum temperature inside cooking vessels were 154 °C, 99 °C, 141 °C and 128 °C while standardized stagnation temperature and first figure of merit (F1) were found to be 159 °C, 100 °C, 154 °C and 109 °C; and 0.26, 0.15, 0.54 and 0.17, for systems with insulated receiver, oil-filled receiver, air-filled receiver, and conventional receiver, respectively. The second figure of merit (F2), overall heat loss factor, heat exchange factor and optical efficiency were determined as 0.36, 0.15, 0.14 and 0.33; 59.7 W/m2 K, 28.6 W/m2 K, 20.49 W/m2 K and 73.4 W/m2 K; 0.18, 0.75, 0.69 and 0.23; 25%, 4%, 4% and 17%. The study found that the cooking system with Insulated Receiver gave more merits and was established as the best.

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Section: Comparison Of Findings Of Present Work With Similar Studiessupporting

confidence: 58%

“…Glazing enhanced the performance. The overall heat loss coefficient without glazing was 41.8 W/m 2 K and with glazing was 6.04 W/m 2 K. [26] Experimental performance analysis of an improved receiver for Scheffler solar concentrator…”

Section: Referencesmentioning

confidence: 99%

Performance analysis of parabolic dish solar cooking system with improved receiver designs

Theu

Kimambo

2023

Renew. Energy Environ. Sustain.

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“…In this experiment, under average beam radiation 640 W/m 2 receiver temperature of 241 • C, 266 • C, 253 • C was achieved with first, second and third arrangement. The average thermal efficiency of the receiver for first, second and third arrangements has been calculated 57.71%, 60.93% and 68.03%, receiver cover with tube coil increases the overall efficiency of the system" [10]. In this study, the receiver with the third arrangement was found efficient, while, in [11], Ruelas et al found that the more suitable geometry for the receiver has an elliptical form.…”

Section: Introductionmentioning

confidence: 54%

“…The size of the image also affects the size of both the receiver and the eventual secondary optics. Malwad et al in [10] analyze three receiver versions: "In these experiments, a receiver with three different types of arrangement was tested under identical solar radiation condition . .…”

Section: Introductionmentioning

confidence: 99%

Optical Raytracing Analysis of a Scheffler Type Concentrator

et al. 2021

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The Scheffler type concentrator is a curved metal reflector particularly suitable for solar thermal systems with a receiver fixed to the ground. Its operating principle is to deform the reflector throughout the year to optimize its performance in collecting sunlight. This study analyses the optical performance of a Scheffler reflector during the year. A CAD software tool is utilized to reproduce the mechanical deformations of a real Scheffler concentrator and the shape of the light spot on the receiver is analyzed by means of raytracing simulations. The starting configuration is the equinoctial paraboloid, which produces a point-like spot on the two equinox days only. On all other days of the year, this paraboloid is deformed in a suitable way in order to keep the spot as small as possible, but, even so, it is no longer a point-like spot. In the present work the simulated light distributions on the receiver, generated by the paraboloids (deformed or original), are compared. The results confirm the working principle of the Scheffler type concentrator and allow correctly sizing the receiver.

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“…The work objective of [ 29 ] was to save electrical energy for a 1-ton room air conditioner by developing a solar refrigeration system. The designed solar-powered ejector refrigeration system was integrated with a flat-plate collector and Scheffler concentrator [ 30 ]. New design basics were using a Scheffler concentrator as a vapor system and an ejector as a cooling system.…”

Section: Introductionmentioning

confidence: 99%

Performance study on a solar concentrator system for water distillation using different water nanofluids

Hameed

Diabil

Al-Fahham

2023

Heliyon

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Experimental performance analysis of an improved receiver for Scheffler solar concentrator

Cited by 10 publications

References 35 publications

Performance analysis of parabolic dish solar cooking system with improved receiver designs

Performance analysis of parabolic dish solar cooking system with improved receiver designs

Optical Raytracing Analysis of a Scheffler Type Concentrator

Performance study on a solar concentrator system for water distillation using different water nanofluids

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