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<p>Receivers of solar parabolic dish concentrators play a vital role in translating solar radiation to thermal energy. Designing the receiver must be done carefully to maximize the process of translating the incoming focused solar radiation to thermal energy. Among the several design parameters of the coiled tubular receiver, the tube size also greatly influences the receiver's heat transfer aspects. The receivers are made of a spiral tube with two different tube sizes and tube wall thickness, and this paper focuses on an experimental performance study comparing the energy and exergy of receivers with a thicker tube and a thinner tube. Based on the experimental results, the average heat loss of the thinner tube receiver was 17.24% greater than that of the thicker tube receiver, which affected the system efficiency. The average energy efficiency and exergy efficiency for the receiver with a thicker tube and the receiver with a thinner tube are 56.21% and 5.45%, respectively, and 39.4% and 3.55%, respectively. The results reveal significant effects of tube dimension on the energy and exergy performance.</p>

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Energy and exergy performance comparison of spiral tube receiver with thinner and thicker tubes for a solar parabolic dish concentrator

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • G. Sathishkumar,
  • V. Thirunavukkarasu,
  • M. Cheralathan

摘要

Receivers of solar parabolic dish concentrators play a vital role in translating solar radiation to thermal energy. Designing the receiver must be done carefully to maximize the process of translating the incoming focused solar radiation to thermal energy. Among the several design parameters of the coiled tubular receiver, the tube size also greatly influences the receiver's heat transfer aspects. The receivers are made of a spiral tube with two different tube sizes and tube wall thickness, and this paper focuses on an experimental performance study comparing the energy and exergy of receivers with a thicker tube and a thinner tube. Based on the experimental results, the average heat loss of the thinner tube receiver was 17.24% greater than that of the thicker tube receiver, which affected the system efficiency. The average energy efficiency and exergy efficiency for the receiver with a thicker tube and the receiver with a thinner tube are 56.21% and 5.45%, respectively, and 39.4% and 3.55%, respectively. The results reveal significant effects of tube dimension on the energy and exergy performance.