Design charts for Scheffler reflector

Reddy, Desireddy Shashidhar; Khan, Mohd. Kaleem; Alam, Md. Zeeshan; Rashid, Haroon

doi:10.1016/j.solener.2018.01.081

Cited by 25 publications

(11 citation statements)

References 15 publications

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“…The receiver is made of cast iron having a volume 18 l. The focal image size is measured by placing a flat black color metallic plate at the focal point of the concentrator. The diameter of the focal image is measured to be 0.47 ± 0.02 m. In addition, from the design chart given by Reddy et al [29] maximum diameter of the focal image formed on a flat receiver is calculated to be 0.42 m. Hence, in the present study, a 50-m 2 aperture area of the receiver is selected in order to intercept all reflected radiations.…”

Section: Solar Receiver Descriptionmentioning

confidence: 90%

Experimental performance analysis of an improved receiver for Scheffler solar concentrator

Malwad¹,

Tungikar²

2020

SN Appl. Sci.

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Section: Solar Receiver Descriptionmentioning

confidence: 90%

Experimental performance analysis of an improved receiver for Scheffler solar concentrator

Malwad¹,

Tungikar²

2020

SN Appl. Sci.

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“…A Scheffler collector of 8 m 2 area was designed and investigated with the principle of medium temperature applications. In this paper, the designing method is very easy, resilient, and does not require any distinctive computational setup, for desirable domestic as well as industrial applications [17,25].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of a Scheffler reflector for the medium temperature applications

Kumar¹

2021

Journal of Thermal Engineering

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This research problem reveals the experimental investigation at a pressure of 1.5 bar and temperature of 120°C for the medium thermal applications utilizing the four Scheffler reflectors with 16 m 2 surface area each. The Scheffler collector associated with absorber plate of mild steel of size, 0.45 m diameter, and 0.025 m thick was assessed in June 2018. The variation in solar beam radiation over the entire day was observed from 840 W/m 2 to 1278 W/m 2 , while, the absorber plate temperature was recorded within the extent of 116-195°C, however, the maximum heating temperature was measured 129°C at the end-use. The Scheffler collectors performed appropriately in the morning and evening time with substantial heat loss factor and lower optical efficiency factor. The energy efficiency of 59.28% has been achieved which is higher as compared to the parabolic solar concentrator. The higher concentration ratio of the Scheffler collector indicates it as an efficient substitute to replace fossil fuels. The system is viable for more than 1600 kWh/m 2 yearly solar potential while the cost of heating is greater than 0.05 $/kWh for them. This paper concludes that the Scheffler reflector is the most promising solar technology for the medium-temperature applications.Cite this article as: Kumar A. Experimental investigation of a Scheffler reflector for the medium temperature applications.

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“…There are some publications that can help manufacture a SSC. A mathematical modeling for an 8 m 2 SSC and design generalized chart were presented by Munir, Hensel, and Scheffler (2010) and Reddy, Khan, Alam, and Rashid (2018), respectively. They showed the parameters to take into account when designing the reflector: how to define the parabola equations, structural bars, and how the tracking system works, for example.…”

Section: Introductionmentioning

confidence: 99%

Technical analysis of an oven with coupled receiver for scheffler solar concentrator tested under cloudy weather conditions

Dib¹,

Marques²,

Figueiredo³

et al. 2020

Acta Sci Technol

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Most of the solar collectors experiments are carried out under clear-sky conditions to evaluate the maximum performance of collectors, even though this condition is not critical for some uses, such as cooking. The optical and thermal performance of a solar oven heated by Scheffler concentrator is here analyzed in more adverse weather conditions. The receiver for conversion and heat transfer of the concentrated solar energy is coupled to an oven specially developed for this work. The Scheffler concentrator geometry is a lateral cut angled 43.23° of a paraboloid matrix, and it works in a two-axis tracking system, to always maintain its focal image at the stationary receiver with the progression of the Earth rotation and solar declination movements. A model for distributing the daily radiation over the hours is used to compare the results. The time-constant experimental method is considered. The heating and cooling tests were carried out at the official local time. The maximum temperature achieved by the absorber was 328°C, and the maximum average temperature in the oven was 150°C. The results for heat loss factor were evaluated, and the trends for thermal efficiency and optical efficiency factor were analyzed for the system considered.

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Design charts for Scheffler reflector

Cited by 25 publications

References 15 publications

Experimental performance analysis of an improved receiver for Scheffler solar concentrator

Experimental performance analysis of an improved receiver for Scheffler solar concentrator

Experimental investigation of a Scheffler reflector for the medium temperature applications

Technical analysis of an oven with coupled receiver for scheffler solar concentrator tested under cloudy weather conditions

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