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CASO 3-9<br />

Costo de <strong>la</strong> eneria_a jovechable (CEA)<br />

CEA= K<br />

H11V x E<br />

K a Costo del combustible ($/gal)<br />

aIIIV Valor calorifico del combuatible (Btu/gal)<br />

E Eficiencia de <strong>la</strong> caldera<br />

Coato del vapor a Ia presi6n |P (CVP)<br />

CVP - CNPV x CEA x I 000 ($/1 000 Ib)<br />

Ahorro pr reduicci6n do prei6n do vapor (ARPV)<br />

ARPV- Vtl x CVP 1 - Vt 2 x CVP 2 (/aAo)<br />

Un sistema opera a 125 psig. So determina quo In<br />

presi6n mAxima requerida es do 100 psig. El procoso<br />

requicre de 3 650 Mfltu/a~o. El aistema opera bajo <strong>la</strong>s<br />

siguientes cond icJones:<br />

El sistema do retorno de condensado es abiorto a In<br />

atm6sfern<br />

- l188 ­

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