Experimental Performance of a Solar Thermoelectric Cogenerator Comprising Thermoelectric Modules and Parabolic Trough Concentrator without Evacuated Tube

L. Miao, Y. P. Kang, C. Li, S. Tanemura, C. L. Wan, Y. Iwamoto, Y. Shen, H. Lin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A prototype practical solar-thermoelectric cogenerator composed of (1) a primary component of a pile of solar-selective absorber (SSA) slab, thermoelectric (TE) modules, and a depressed water flow tube (multichannel cooling heat sink, MCS), and (2) a parabolic trough concentrator with aperture area of 2 m × 2 m and east–west focal axis was constructed. Its cogeneration performance under the best climatic and solar insolation conditions in Guangzhou, China was tested. For simplicity, the evacuated glass tube to cover the primary component was eliminated from the system. Six Bi2Te3 TE modules were arranged in series, directly bonded to the rear surface of the solar absorber slab. The hot-side temperature of the TE module reached up to 152°C. The experimentally obtained instantaneous results for the solar to electrical conversion efficiency, heat exchange coefficient of the MCS, and overall system efficiency under the best environmental and solar insolation conditions were about 1.14%, 56.1%, and 49.5%, respectively. To justify these values, an equivalent thermal network diagram based on a single-temperature-node heat transfer model representing the respective system components was used to analyze the thermal transfer and losses of the system. Finally, electrical power of 18 W was generated, with 2 L/min of hot water at 37°C being produced and stored in the insulated container.

Original languageEnglish
Pages (from-to)1972-1983
Number of pages12
JournalJournal of Electronic Materials
Volume44
Issue number6
DOIs
Publication statusPublished - 2015 Jun 1
Externally publishedYes

Keywords

  • electrical conversion efficiency
  • electrical power
  • parabolic trough concentrator
  • solar thermal conversion efficiency
  • solar thermoelectric cogenerator
  • Thermoelectric modules

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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