Effects of shading and blocking in compact linear fresnel reflector field

Vashi Sharma*, Sourav Khanna, Jayanta K. Nayak, Shireesh B. Kedare

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In a compact linear fresnel reflector field, 's' number of reflector-rows lying between two receivers can be configured in 2s ways. Each possible configuration will lead to different energy loss, electricity generation and cost of electricity. The variations in energy losses, energy collection by fluid, electricity generation and cost of electricity with length (L) and width (w) of aperture of a reflector-row, spacing between adjacent reflector-rows (p), number of reflector-rows (2n), receiver-height (H), collector-configuration and location have been studied. It is found that the collector configuration has no significant effect on annual shading. However, it affects annual energy losses due to cosine effect, blocking and the factors τ and α significantly. As a result, the cost of electricity can be improved significantly by varying collector configuration. The cost of electricity decreases with increment in p/w and later on, it starts increasing. The best p/w ratio corresponding to minimum cost of electricity is 1.44 for H/nw = 0.3 and 1.85 for H/nw = 0.7. The energy collection by fluid increases rapidly with increment in H/nw initially. However, beyond H/nw about 0.7, further increase in H/nw does not lead to significant increase in energy collection.

Original languageEnglish
Pages (from-to)633-653
Number of pages21
JournalEnergy
Volume94
Early online date15 Dec 2015
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Blocking
  • Compact linear fresnel reflector
  • Cost of electricity
  • Shading

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