Development and fabrication of a hybrid holographic solar concentrator for concurrent generation of electricity and thermal utilization

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:201324

Froehlich, K; Wagemann, U; Frohn, B; Schulat, J; Stojanoff, C G ^[1]

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1. Technical Univ. of Aachen (Germany). Lehr- und Forschungsgebiet Hochtemperaturthermodynamik

The efficiency of photovoltaic generators that are based on different semiconductor materials with optimized band-gaps can achieve considerably higher values than those obtained from single junction devices, e.g. Si-based solar cells. Hence, the splitting of the solar spectrum for use with the different band gap cells is a desired characteristic of the solar collector. An enhanced efficiency is realized with the concentration of the incident solar radiation onto the corresponding solar cell. The optical characteristics of the holographic solar concentrator satisfy these requirements. The undiffracted solar radiation should be collected by an absorber that also cools the solar cells. This is the concept of the hybrid collector for electricity and thermal utilization that is presented in this paper. It can achieve an electrical efficiency about 22% and a thermal efficiency of 35% with a temperature of 100 C.

• OSTI ID: 201324
• Report Number(s): CONF-930722--; ISBN 0-8194-1266-X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ALUMINIUM ARSENIDE SOLAR CELLS
CONCENTRATOR SOLAR CELLS
DESIGN
ENERGY EFFICIENCY
GALLIUM ARSENIDE SOLAR CELLS
HOLOGRAPHY
HYBRID SYSTEMS
OPTICAL SYSTEMS
PHOTOVOLTAIC POWER SUPPLIES
SOLAR ABSORBERS
SOLAR THERMAL CONVERSION