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Organic Rankine Cycle

First heliostat field made in Brazil

Submitted by Baerbel Epp on April 19, 2018
Photo: USPThe University of São Paulo in Pirassununga (see photo) is about to get its own field of heliostats on campus. Once completed, the sea of mirrors will focus sunlight onto a receiver connected to an Organic Rankine Cycle system. The heat transfer fluid will be ambient air. The ORC turbine ‘waste’, hot water at 90 °C, will be directed to a nearby abattoir. The demonstration plant is part of SMILE, which is short for Solar-Hybrid Microturbine Systems for Cogeneration in Agro-Industrial Electricity and Heat Production.
Photo: USP

Italy: 10,000 m² ORC-Connected Fresnel and Parabolic Trough Fields

Submitted by Baerbel Epp on September 19, 2017
Fresnel Collector Field ItalyItaly’s feed-in tariff for medium-size concentrating solar power plants has supported the installation of a 10,000 m² Fresnel collector array in Sardinia (see photo). The mirrors have been in operation since spring this year and are connected to an Organic Rankine Cycle (ORC) unit with 600 kW of nominal electric power. Construction for a second demonstration system, a 5 MWth parabolic trough field linked to an ORC turbine, is currently underway in Sicily. Both installations heat thermal oil to between 250 and 300 °C and use it to transfer heat directly from the solar panels to the ORC units by Italian-based Turboden, bringing their electrical efficiency to up to 25 %.
Photo: CSP-F (FERA Group)
 

Denmark: Concentrating Solar Collectors for District Heat in Northern Europe

Submitted by Baerbel Epp on August 11, 2017
BronderslevBrønderslev, a Danish municipality with a population of 12,500, is setting up a multi-purpose renewable heat plant for their district heating network. So far, local utility Brønderslev Forsyning has been operating seven gas-fired combined heat and power (CHP) plants and two gas boilers to produce 130 GWh of heat each year. In the future, most of the yearly district heating demand is planned to be met by a new Organic Rankine Cycle (ORC) unit which receives its energy from two wood chip boilers with 10 MW each and from a 16.6 MWth parabolic trough collector field with a mirror area of 27,000 m². 
Photo: Aalborg CSP
 

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