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parabolic trough collectors

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
 

USA: Solar Steam Installation for California’s Pistachio Harvest

Submitted by Baerbel Epp on July 10, 2017
SunvaporCalifornian start-up Sunvapor has found its first solar steam customer for a demonstration system with the Green Parabolic Trough Collector technology developed in-house. In April 2017, it announced that it had gone into partnership with Horizon Nut to install a 50-kW solar process heat installation at the latter’s pistachio processing facility in Firebaugh. Sunvapor’s CEO and founder Philip Gleckman confirmed that the system is scheduled to come online at the end of this year. The fluid heated to 230 °C is said to be used for pasteurising, blanching and roasting pistachios. Horizon Nut is a growers’ cooperative which collectively processes about 70 % of the pistachios in California. The photo shows a laboratory prototype of the parabolic trough collector with the wooden mounting system. This prototype was used to validate the structural model.
Photo: Sunvapor
 

India: Honeywell Successfully Showcases Solar Cooling Project

Submitted by Baerbel Epp on June 9, 2017
HoneywellTypically, lighting and air conditioning account for more than half of overall electricity consumption in India’s industrial offices. As applications in industry have been hit with the highest tariff of all power consumers, it will need new solutions to reduce the electricity demand of conventional AC systems. To this end, Honeywell Technology Solutions based in Hyderabad in the southern state of Telangana has been operating a pilot project for solar thermal cooling since March 2013. The lithium-bromide chiller is connected to 128 parabolic trough collectors, each with a reflector area of 6.41 m², and provides air cooling at temperatures between 21 °C and 23 °C for six months a year. The collectors were delivered by the solar energy division of Indian manufacturer Thermax. 
Photo: Honeywell Technology Solutions
 

China: Vicot Solar Systems Provide Heat at Siemens and Procter & Gamble Facilities

Submitted by Baerbel Epp on March 6, 2017
THVP SiemensWith Procter & Gamble and Siemens subsidiary Trench, Vicot Solar Technology has two prominent references in China to showcase the successful integration of solar heat into industrial processes. The plant at Trench High Voltage Products (THVP) in Shenyang (see photo) came online in November 2014 and has since been operated by THVP itself. Backed up by an oil heating unit, the system’s parabolic trough collectors with 3,255 m² of aperture area provide heat at 150 °C for processes in the electronics factory and supply the heating systems of the 33,000 m² office and the production facilities in winter.
Photo: Vicot
 

India: Showcase in Fast-Growing Dairy Industry

Submitted by Baerbel Epp on February 18, 2017
Amul Fed DairyAmul Fed Dairy based in Gandhinagar in the western Indian state of Gujarat is one of the country’s biggest milk-processing plants and is owned by Gujarat Cooperative Milk Marketing Federation. In October 2016, it had a 560 m² parabolic trough collector field installed to allow for the feed-in of solar steam into the factory grid. The INR 15.7 million (around EUR 220,000) system was set up by Thermax, an Indian manufacturer of solar heating and cooling technology. It was designed to reduce gas consumption by about 50,000 m³ each year – which barely meets 0.59 % of the energy demand for the entire facility. India is one of the world’s largest producers of milk, with an annual output of 140 million tonnes, a figure that will probably rise to 200 million by 2022. 
Photo: Amul Fed Dairy
 

USA: SunShot Funds Development of Cost-Effective Concentrating Collectors

Submitted by Baerbel Epp on August 29, 2016
SunshotOn 28 July, the US Department of Energy (DOE) awarded grants to six research projects which aim to reduce the costs of concentrating solar collectors. The initiative is called COLLECTS, which is short for Concentrating Optics for Lower Levelized Energy Costs, and focuses on the most expensive component of a CSP plant: the collectors / the reflector. One of the beneficiaries of the COLLECTS budget of nearly USD 9 million is California-based, early-stage technology provider Sunvapor, which is planning to supply the industry with solar steam solutions more cost-effective than natural gas-based steam boilers. COLLECT is part of the DOE’s SunShot initiative started in 2011.
 

Denmark: Solar Concentrating Systems to Offer Wide Array of Uses

Submitted by Baerbel Epp on June 20, 2016
Aalborg Tars InaugurationAt present, the Danish turnkey supplier of concentrating solar systems, Aalborg CSP, has two more large projects under construction. Both installations – one for Danish district heating company Brønderslev Forsyning and one for Australian vegetables producer Sundrop Farms – cover electricity and heat demand at their sites. Yet another first-of-its-kind project was inaugurated in August 2015 in the Danish village of Tårs (see photo), 30 km north of Aalborg. It entailed 4,039 m² of parabolic trough collectors and a preheating flat plate collector field of 5,972 m². Simulations have pointed to a 31 % coverage of annual heat demand even without seasonal storage, since overheating in summer can be avoided by moving the parabolic trough collectors out of focus. Aalborg CSP is an experienced planner of steam and boiler systems and has been offering concentrating solar solutions since 2007. 
Photo: Tårs
 

Denmark: Combined CSP and Flat Plate Collector System Supplies Solar District Heating

Submitted by Baerbel Epp on January 30, 2015
Solar District Heating Tars7 January 2015 was the starting date for the construction of a unique solar heat plant for district heating in the Danish village of Tårs, 30 km north of Aalborg. It combines parabolic trough collectors and flat plate collectors in order to cover 30 % of the heat demand by the village’s district heating network, without the need for seasonal storage. The system is expected to come into operation during the second quarter of 2015. 
Photo: Aalborg CSP
 

Switzerland: Parabolic Trough Collectors Produce Heat for Dairy

Submitted by Baerbel Epp on September 22, 2014
LESAewz’s latest solar project as an energy service company (ESCO) is the solar plant at dairy company Lataria Engiadinaisa SA (LESA), which is located at an altitude of 1,700 m in the Swiss Alps. With its 115 m² of parabolic trough collectors by NEP Solar, the solar plant heats thermo-oil up to a temperature of 180 °C in order to provide heat for steam production. The investment of Swiss Franc (CHF) 500,000 was jointly financed by the Swiss Federal Office of Energy and ewz. The heat is sold to LESA at the same full cost as steam production by the dairy´s installed oil boiler. The project won the Swiss Solar Prize in 2012. 
Photo: ewz
 

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