The plant produces hot water for the entire campus. It also provides energy for the cooling (cooling) of the university buildings, which is a significant cost factor because of the high outside temperatures. The cooling system is based on a lithium-bromide-based absorption chiller with a cooling capacity of 1,575 kW. This makes the system not only the largest, but also the most powerful solar-powered cooling project worldwide. To compensate for differences between energy production and consumption loads, two heat accumulators with 30 m³ each as well as a 7 m³ hot water tank were installed.
The collector type used for this project “Gluatmugl HT” is a particularly suitable for high temperatures (80-95 ° C) of suitable large area collector. By a double cover the collector achieves a very low heat loss.
In addition to the outer highly transparent solar glass pane (unstructured float glass), an inner cover made of a transparent and high temperature resistant Teflon film is installed. In order to reduce heat losses due to the high working temperatures, the “Gatmugl HT” collector has a back wall insulation consisting of 120 mm mineral wool. & Nbsp; This collector is operated by the Austrian company ökoTech Produktionsgesellschaft für Umwelttechnik mbH, a subsidiary of S.O.L.I.D. Austria group. Over 10,000m² of the new collector type are already in operation.
The facility was built by S.O.L.I.D. as an energy service. This means that the university does not buy the facility, but with S.O.L.I.D. a long-term contract for the acceptance of solar-produced heat and cold. The UWCSEA pays the same price, which costs Fernkälte in Singapore. Since the conceptual design, the planning, the construction and the optimization of the plant were carried out to a large extent in Austria, the domestic value added amounts to about 75%.
The large-scale plant complies with the criteria of the “Greenmark Platinum” certificate, the highest certification for environmentally sound construction in Singapore and received the Solar Pioneer Award 2010. The S.O.L.I.D. GmbH is currently working on further projects that will exceed the dimensions of the plant presented here.