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TED - Tenders Electronic Daily (Publications Office of the EU) verified 1 week ago Prior information notice

Study on risk and feasibility assessment of geothermal use of mine water at the Wismut GmbH site in Aue

Original Deutschland - Dienstleistungen von Architektur-, Konstruktions- und Ingenieurbüros und Prüfstellen - Studie zur Risiko- und Machbarkeitsabschätzung geothermischer Grubenwassernutzung am Standort Aue der Wismut GmbH

Closed Germany Chemnitz Architecture & engineering services

Buyer Wismut GmbH

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Summary

Machine-generated summary

Wismut GmbH is procuring a study on the risk and feasibility of using geothermal energy from flooded mine water at its Aue site. The current situation: a central oil heating system at Hartenstein with up to 920 kW capacity and an annual heat demand of about 1.3 GWh, and the flooded Rundschacht 371 shaft, 1,090 m deep, linked to a mine field with about 36 million m3 of flood volume. Contaminated water at 27 to 28 °C circulates in the shaft. Nearby, the Schlema-Alberoda water treatment plant handles around 500 m3/h of pumped flood water, discharging at 20 to 24 °C into the Zwickauer Mulde. Both heat sources are currently unused.

Description

Die Wismut GmbH betreibt am Standort Hartenstein (Talstraße 7, 08118 Hartenstein) eine zentrale Ölheizungsanlage mit einer maximalen Leistung von 920 kW. Die Anlage hat einen derzeitigen jährlichen Wärmebedarf von ca. 1,3 GWh. Direkt am Standort befindet sich der geflutete, 1.090 m tiefe Rundschacht 371 mit einem lichten Profil von 38,46 m² und einem Ansatzpunkt bei 355 m NN. Er besitzt drei Anbindungen (in den Sohlenniveaus -540 m, -990 m und -1.080 m) an das weitläufige Grubenfeld mit ca. 36 Mio. m³ Flutungsraum. Im Schacht zirkuliert kontaminiertes Flutungswasser mit einer Temperatur von 27 - 28 °C und einem mittleren Einstauniveau zwischen 300 m und 305 m NN. Das Einstauniveau kann in Ausnahmefällen ein Maximum von bis zu 316 m NN und ein Minimum von 286 m NN erreichen. Der Schacht ist mit einer tagesnahen Plombe verwahrt, die drei Monitoringöffnungen (Rohrtouren) aufweist. Weiterhin befindet sich in 800 m Entfernung (Luftlinie) die Wasserbehandlungsanlage (WBA) Schlema-Alberoda. Hier erfolgt die Behandlung des mit Unterwasserpumpen gehobenen Flutungswassers mittels Kalkfällung. Die Anlage wird im kontinuierlichen Regime gefahren, muss aber tageweise für Wartungs- und Instandhaltungsmaßnahmen außer Betrieb genommen werden. Der durchschnittliche Durchsatz der Anlage beträgt 500 m³/h. Das behandelte Wasser wird über eine Wasserrösche (Ableitungsstollen) im freien Abfluss in die Zwickauer Mulde abgeschlagen. Die Wassertemperatur beträgt dabei ca. 20 - 22 °C im Winter und 23 - 24 °C im Sommer. Beide Wärmequellen werden derzeit nicht genutzt.

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Source: TED - Tenders Electronic Daily (Publications Office of the EU)

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Last verified against TED - Tenders Electronic Daily (Publications Office of the EU) 1 week ago

Wismut GmbH

Germany

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Germany · Architecture & engineering services

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Based on 12,387 awards with a named winner over the last 3 years. Counted by award, not by value, because lot and framework amounts are not comparable. Concentrated means the three most frequent winners took 65% or more of the awards; many suppliers, under 35% with at least ten different winners.

Competition

tenders per lot on average (open and restricted procedures)
5.5
of those lots received a single tender
11%
of the awards went to companies based in another country
1%
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As the official award notices state them, over the last 3 years. Tenders per lot count open and restricted procedures only: in a negotiated procedure or a direct award a single tender is the procedure itself. The country is the one the notice gives for the winner.

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