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I I I I I I I I I I I I' I I I, I I I I It should be EIlphasized that this represents a theoritical condition. That due to the dynamic nature of the flows, salinities, and changes in YDP production, based upon aging of the reverse oSlOOsis membranes, actual oonditions and results would be different than the case presented here. Al. Off-Peak. Firm Power This plan represents anl y a rocx:Iest change in plant operation. During peak power periods operation of the reverse oSlOOsis membranes, which are heavy power users, would be stopped. This would reduce power requirements during peak hours by 70 to 80 peroent and reduce the overall power requirem3nt 15 to l8 percent. However, it would recIuce the effective YDP capacity by about 25 percent. , 1\nnua.l O&M oosts, including the cost for 55,000 acre-feet annually of reject stream repla,-",uE!nt. water, would be about $25.2 million. Potential annual savings would be $2.3 million. ::::;.-- 1\dvantages : o Reduces energy requirem3nt during peak hours by 70 to 80 percent. o Reduces power costs by reducing the plant product and utilizing offpeak rates. Disadvantages: o Reduces YDP output to 75 percent of rated. productivity and would not always meet Minute No. 242 without additional releases fran ii"lJ"'::-~ ',!\ ny" 1 '"': ',f f.l'2};> " ,'. ,c. ....',,'..,' C, ft 1.''1.. L;' t ~. t. '~i"':: .~: ~":'_~ f~"~\ ;~ { ~ II ~ 'Ilo...j r;"";"!,: c:: " "J ~ :. ',.. ~..~. >.! S · ..." ".~ ,~- ~ It" J '1 ,. !'! \ ~ ~ t.~ ~ :~.. ~; ;1 UII.II',.'ff:_..:...d 1Cc:T"=....n.\ ~ .~ ~ ~ ""'..:. "~. ""7, JP "" ~ ~ ~J : ,.. ," ,-;: <-~ "'I'- ,., ,. 1 " +:. .. " ,.. ~.. ~"~L. 'i ~j}~Ui~1