The Cryostar Magazine N°3 : pdf file

Energy-Recovery withCryostar - TurbinesProducing clean energy is the way of the future. Through the use of expansion turbinesin natural gas pressure let down stations, Cryostar combines the growing demand fornatural gas fuel with production of clean, ‘green’, electricity.Clean Energy-Production andEnergy-Recovery (ER) havebeen high on the agenda of theenergy sector for many years.Cryostar realised the advantagesof ER early on, and since 1985has been developing expansionturbines for such applications.The first ER-unit with aCryostar turbine was installedat Ravenna, Italy, in 1987, withan output of 1,400 kW.Since then, ER-units havebeen operating successfully inItaly, Germany and the Netherlands.The latest, and mostmodern unit utilising Cryostartechnology, was commissionedin Arlesheim, Switzerland, forthe gas utility company GasverbundMittelland AG (GVM).The installed power is 3,050kW, with electricity productionstanding at about 18,000 MWhper year. Output is produced byone Cryostar expansion turbineTechnical Data of the PlantP r e s s u r e d r o p o f t h e natural gas :M a x . t h r o u g h - p u t o f t h e natural gas :A n nual elec t r i c p o w e r p r o d u c t i o n :T h e r m a l e f f i c i e n c y : 85%Tu r b i n e e f f i c i e n c y : 81%El e c t r i c a l p o w e r o f t h e t u r b i n e :El e c t r i c a l p o w e r o f t h e t w o B H K W s :Tot a l e l e c t r i c a l p o w e r :S u p p l y v o l t a g e i nto the net w o r k :and two block-type thermalpower stations (BHKW) fromJenbacher, and will run at fullpower for about 5,000 hours peryear. The general planning ofthe Arlesheim site was done bySwiss engineering firm, Eicher +Pauli AG.4 0 to 55 b a r35,0 0 0 N m 3 / h18 , 0 0 0 M W h1, 8 0 0 k W2 x 6 25 k W3, 0 5 0 k W13 k VSpring 2004 3