plate collectors specially designed for processing heat and solar cooling applications, where


high efficiency at


temperatures up to 98°C is needed. The collector has two air chambers separated by teflon foil. In comparison to concentrating systems this collector needs less maintenance and benefits from diffuse radiation. 36 SOLERA parabolic trough collectors of


122m², which can be operated in high temperature conditions, were also installed. They were to act as a temperature booster, so that the already heated up water from the flat plate collectors would be boosted to a maximum of 110°C. Consequently, maximum support for the steam boiler can only be achieved on a clear sunny day.


highly insulating blocks for external walls to 220cm long hollow bricks used in walls over doors and windows. The manufacturing process involves a number of operations where heat is required, from brick extrusion, where hot water or steam is used to increase the raw material ductility, to brick cooking. Dryers are specially designed for hollow


bricks, which typically have thin walls and must be dried quickly in order not to distort their shape during the water evaporation process. The material is dried in less than an hour, by means of a mass of hot air at 220-240°C. The company is using solar heat in an innovative drying system that uses higher temperatures (200°C) to evaporate water from wet bricks. Soltigua’s Fresnel collector FTM is a linear concentrating


“We have been looking to demonstrate to industry that these systems can be relied upon and can save money in the long run”


Large amounts of steam and hot water are


required for the production of meat products, and this is now partly provided by the solar thermal plant. The steam is used for different purposes, though most of it is used in the ham cooking chambers. The hot water generated supports cleaning processes and is used for drying air in climate and maturation rooms, where hard


smoked sausages are produced and stored. Fleischwaren Berger


factory for feed water pre heating of a steam boiler up to 103°C, and tracked concentrating Fresnel collectors


for an


Italian brick drying factory demonstrating direct and indirect steam generation at 200°C. Each of these applications offers a high replication potential.


Steam production for meat and sausage production Fleischwaren Berger, a company that produces meat products such as cooked ham and sausages, installed a large-scale solar thermal plant with a total collector area of 1,068 m². The flat-plate collector field installed by the solar system provider S.O.L.I.D consists of highly efficient flat


www.projectsmagazine.eu.com 29


Brick drying process Laterizi Gambettola SRL is historically active


in the construction business,


especially in manufacturing hollow bricks. Its product catalogue comprises all clay products used in thin walls, ranging from


SOLTIGUA


system for generating heat in the range of 30 KW to several MW at temperatures up to 250°C. It consists of highly reflective polished aluminium mirrors and selectively coated stainless steel receiver tubes. In many industries steam is used as the


main heat carrier. If steam can be produced by solar systems then integration into the existing heat supply infrastructure is not very complicated. At SOLTIGUA two solar steam generation systems are demonstrated: one with indirect steam generation with thermal oil in the collectors (1072 m² collector area) and a thermal oil driven steam boiler, and one with direct steam generation within the collector field (1608 m² collector area).


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