Celi Power Sysrerns Projecr in Connecricur can be seen. Projecr parricipanrs included ehe Gas Research Insrirure, DOE and Unired Techonolgies Corpornrion. On-site foel celi power planrs concain rhree rnajor sub-sysrerns or secrions. In ehe fuel processing secrion, nacurnl gas is converrecl ro a hyclrogen-rich fuel. Ir is rhen feci inro ehe power secrion, where ehe hydrogen is elecrrochernicallyreacred wich oxygenfrorn ehe air coproduce direcc currenc elecrriciry and by-producr hear (in rhe form ofhor warer or srearn). In ehepower conclicioning seccion, ehe direcc currenc electricicy is converced ro alrernacing currenc at ehe appropriate frequency and volcage levels. This 40 KW power plant, developecl by ehe Tearn To Aclvance Research on Gas Energy Transforrnacion (TARGET) and ehe Uniced Technologies Corporacion, achieved rocal efficiencies of up ro 80% and pavecl ehe way for cechnical and operacional field cescing. Phorographs 2 ancl 3 are ofa wasce heac recovery and use projecc in New York dernonstrating a binary Rankine eyde cogeneracion syscern used co generace power from sirnulaced wasce heac which was clevelopecl by Mechanical Technology Inc. as pare ofa $ 1 .5 millionprojeccwich DOE. Herearegeneral views of ehe cogenerncion equipmenc. The inicial rest rnns were conducrecl under conclicions designed cosimulace chose of a diesel-powered eleccric generacor commonly DOGAL GAZ DERGİSİ SAYI. 33 106 usecl in srnaller power plancs. Heac frorn a hor gas, cluplicacing ehe 520-degree Fahrenheic exhausc ofa curbo-chargecl diesel engine is used firsc co produce scearn ro spin a curbine. Exhausc frorn ehe sceam curbine is eben usecl co vaporize freon which, in curn, spins a second curbine. The cwo turbines are couplecl co a single generaror by using special gears. This procluces adclicional eleccricicy ebat can be used on-site or feci co a power grid. Phorographs 4 ancl 5 are views of ehe cechııicians working on ehe cogeneracion equiprnenc. Cogenerarors, boch QF ancl non-QF, accouncecl for nearly three-quarters of rocal U.S. nonucilicy eleccriciry generaciııg capaciry in 1991 (Figure 5). Tlıe primary eııergy source is genernlly a fossil fuel (coal, perroleum, or nacural gas), alrhough reııewable energy sources are also used, parricularly wood ancl waste. Ic should be noted ebat cogenernrion is not always economically efficienc, even clıough it may use energy more efficiencly. Tlıus, while cogeneracion may conserve eııergy resources, ic may wasce rota! resources. In 1992, former Presidenc George Bush signecl
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