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The Stand-alone Heliostat; El Heliostato Autonomo

Abstract

The first Autonomous Heliostat has been developed by CIEMAT at PSA facilities in Almeria. This heliostat is an innovative approach to reducing the civil engineering work costs in heliostat fields of central tower plants. Channels, cables and other electric elements have been eliminated in the new heliostat. Thus, one 70-m''2, classical T glass/metal heliostat has been adapted to include all the new stand-alone concept components. A PV system is able to drive two sun-tracking DC motors between 5 and 24 Vdc, 0 and 15A. The heliostat communicates with the control room 400-m away by using a radio-modern working at 9600 baud. An anemometer, a wind switcher, light and ambient temperature sensors have been installed on the heliostat for self-protection decision-making. A PV panel integrated into the heliostat reflecting surface, eliminates cabling and other elements required for a conventional power supply. Communication lines between master control and local control have been replaced by radio-modern. Testing has validated the technical feasibility of the prototype and quantified the real consumption and efficiencies of new elements. The extra costs produced by the autonomous concepts are compared with the cost of civil work in conventional heliostat field. (Author) 8 refs.
Authors:
Garcia Navajas, G; Egea Gea, A [1] 
  1. Ciemat. Madrid (Spain)
Publication Date:
Jul 01, 2000
Product Type:
Technical Report
Report Number:
CIEMAT-942
Reference Number:
EDB-01:045470
Resource Relation:
Other Information: PBD: 2000
Subject:
14 SOLAR ENERGY; HELIOSTATS; SOLAR EQUIPMENT; SOLAR TRACKING SYSTEMS; SOLAR ENERGY; CONTROL SYSTEMS; COMMUNICATIONS; RADIO EQUIPMENT; PHOTOVOLTAIC POWER SUPPLIES
OSTI ID:
20118381
Country of Origin:
Spain
Language:
Spanish
Other Identifying Numbers:
TRN: ES00E0398
Availability:
Available to ETDE participating countries only(see www.etde.org); commercial reproduction prohibited; OSTI as DE20118381
Submitting Site:
SP
Size:
89 pages
Announcement Date:
Jun 04, 2001

Citation Formats

Garcia Navajas, G, and Egea Gea, A. The Stand-alone Heliostat; El Heliostato Autonomo. Spain: N. p., 2000. Web.
Garcia Navajas, G, & Egea Gea, A. The Stand-alone Heliostat; El Heliostato Autonomo. Spain.
Garcia Navajas, G, and Egea Gea, A. 2000. "The Stand-alone Heliostat; El Heliostato Autonomo." Spain.
@misc{etde_20118381,
title = {The Stand-alone Heliostat; El Heliostato Autonomo}
author = {Garcia Navajas, G, and Egea Gea, A}
abstractNote = {The first Autonomous Heliostat has been developed by CIEMAT at PSA facilities in Almeria. This heliostat is an innovative approach to reducing the civil engineering work costs in heliostat fields of central tower plants. Channels, cables and other electric elements have been eliminated in the new heliostat. Thus, one 70-m''2, classical T glass/metal heliostat has been adapted to include all the new stand-alone concept components. A PV system is able to drive two sun-tracking DC motors between 5 and 24 Vdc, 0 and 15A. The heliostat communicates with the control room 400-m away by using a radio-modern working at 9600 baud. An anemometer, a wind switcher, light and ambient temperature sensors have been installed on the heliostat for self-protection decision-making. A PV panel integrated into the heliostat reflecting surface, eliminates cabling and other elements required for a conventional power supply. Communication lines between master control and local control have been replaced by radio-modern. Testing has validated the technical feasibility of the prototype and quantified the real consumption and efficiencies of new elements. The extra costs produced by the autonomous concepts are compared with the cost of civil work in conventional heliostat field. (Author) 8 refs.}
place = {Spain}
year = {2000}
month = {Jul}
}