Description: Das Projekt "Dampferzeugung mithilfe eines Waermewandlers" wird vom Umweltbundesamt gefördert und von GEA Luftkühlergesellschaft Happel, Hauptabteilung Forschung und Entwicklung durchgeführt. Objective: To install a heat transformer for the recovery of waste heat contained in wet steam (70-120 degree C.) which is at present not used, to produce steam at 130-150 degree C. The project is expected to confirm, if not improve upon, results already obtained with an existing pilot installation. Operating 8,000 hrs/yr a steam production of 31,600 tons/yr at 2.5 bar corresponding to 2046 TEP/yr is expected. Payback is estimated at 4.2 yrs. General Information: The heat transformer is fed by process waste heat at a temperature of about 100 degree C. A part of this energy is transformed to a higher temperature heat (ca 130 degree C.) and constitutes that fraction which can be recovered, the remainder being exhausted at a lower temperature of about 40 degree C. The working fluid is a solution of water mixed lithium bromide (LiBr). In comparison with ammonia (NH3), this solution allows operation either under vacuum or slight over pressure in the transformer's internal circuits thus avoiding the high pressures (up to 40 bar) seen when NH3 is used. LiBr leaks are almost completely avoided. The heat transformer will be installed in a chemical firm (Degussa works, in Wesseling, Cologne) where the steam coming from a dehydration unit will be used as the heat source. The transformer will extract 4.7 Mw from the heat potential available in this steam. Of this 4.7 Mw, 2.3 Mw will substitute 3.52 ton/hr of steam at 3 bar of the boiler production. The remainder, 2.4 Mw will serve to heat 110 m3/hr of water from 15 to 34 degree C. The efficiency of the transformer, defined as the ratio of the energy transformed to the highest temperature (2.3 Mw) and the waste energy supplied at lower temperature (4.7 Mw), is 48 per cent. Achievements: The planning, mechanical design, and the erection was finished in June 1988. There were problems from the very beginning of the first test series under design conditions with 100 degree C waste steam. From the recorded data, small leakages could be detected at high temperature, but no leakage could be detected on the cooled down heat transformer. Due to these leakages, pitting corrosion occurred in the absorber tubes. This generated some small holes in some of the stainless steel tubes. During the demonstration phase of the project several performance tests were executed. Due to varying steam production of the dryer and varying composition (air content) of the exhaust steam, the efficiency of the heat transformer (that is the recovered heat in the form of produced steam of 130-150 degree C) varies too. The cop was found to be between 0.33 to 0.4. Typical values are Exhaust Steam Produced Steam Steam Pressure Cop: t/hr t/hr bar, 6,45 2,1 3,4 0,33; 7,4 2,8 3,0 0.38; 5,0 2,03 3,0 0,4.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Köln ? Ammoniak ? Bromid ? Lithium ? Seen ? Abfallbehandlung ? Absorber ? Abwärmenutzung ? Chemische Industrie ? Heizenergie ? Prozesswärme ? Temperaturverteilung ? Thermodynamik ? Wasserdampf ? Wassertemperatur ? Prozessabwärme ? Korrosion ? Warmwasserbereiter ? Energierückgewinnung ? Amortisation ? Arbeitsstoff ? Materialprüfung ? Alternative Energie ? Abwärme ? U-Bahn ? Wärme ? Wärmeerzeugung ? Warmwasserbereitung ? Edelstahl ? Energetische Verwertung ? Wärmeeffizienz ? Vergleichsanalyse ? Energieeinsparung ? Abfall ? Energieumwandlung ? Niedrigwasser ? Energienutzung ? Chemisches Verfahren ? Wassernutzung ? Dampfdruck ? Wirkungsgrad ? Wirtschaftlichkeit ? Dampfkessel ? Daten ? Chemikalien ? Höhle ? Forschung und Entwicklung ? Kühlung ? Ökoeffizienz ? Energietechnik ? Umwelttechnik ? Produktdesign ? Entwässerung ? Kessel ? Umweltfreundliche Technologie ? Leckage ? Anlagenbetrieb ? Physikalische Größe ? Versuchsanlage ? Anlagenbau ? Pilotprojekt ? Temperaturerhöhung ? Wärmetransport ? Transformationsraum ? Wiederfindungsrate ? Wärmefluss ? Wärmetransformator ? Substitutionseffekt ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1984-11-14 - 1992-12-31
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