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ORANGE COUNTY JAIL HVAC SYSTEM UPGRADE LIFE CYCLE COST ANALYSIS ~NTRC]D~JCTI~N In an ahem. t to ident%fy the best replacement system for the Orange bounty fail H~'AC system .p . ho~en far fur~he~. stud ~n this Life ~ cl.e host Anal sus. This Est the. fol~dw~ng systems were c ~ ~ ~ Y y does NAT indicate any order of preference: ~ Four-pipe hydro~uc systems using constant volume 4-pipe air handling units. This scheme would involve running new hat water piping and chilled water piping where necessary, new chillers and boilers, and new air handli~ag units. ~ dater source heat pump units distributed in closets and on mechanical platforms. This system would involve adding a cooling tower and heat exchanger, replacing existing bailers, runtung new piping throughout the building, ~ and installing new water source heat . pumps in the building. ® ~~ air handling units with hot water heat. This system would require replacing air haridli~ ~ units, re lacing boilers and hat water piping, and adding ~~ condensing units g p on the roof. ~~ Oeathermal heat pumps. Though it may have bean attractive, this option 'was eliminated due to the a~-~senee of adequate area and tl~e camplication~ ass~a~ciated with installing 1 S- 2~~ ~SQ~ dee wells ~ aced out on ~0~ x ~~~ .grid spacing. T'he terrain surrounding the p P . jail is predorninatel~ payed areas ~sixeets~ and. parking}, adjacent buildings, and gaassy areas containing a significant amount of trees. ~. order to maintain a high level of eff ciency, geatliermal well fields should be located as dose la the building as possible tea minimize .the amount of pumping power required. horizon#al trenching anal vertical drillin~~ in.~e immediate area of the jail would slgnifcantly disrupt services to this ~ ~ " ~y r building and the surrounding bu~ld~ngs as well. The gassy area surrounding the Old Cvu~~thouse was eluted because the trenching and drilling required could destroy the root system. for the treed .in this area. Alsoa any piping would have to be tunneled below the :street and would have to be coordinated with any utilities in this area ~xnuch are unknown}. ~FT~iC~~ O~F ANALYSE Cost estimates far system were performed far each of the s~ste~n,s described above, based on historical cash data and RS beans cast estimating manuals. These estimates are far comparison u ~ ~ ~ uses only at this point as the project budget will need to reflect other design ele~~nentss prices, p~ and. pl~asing~ etc. The building envelope and load characteristics were .modeled using Bquest software ~OC~~-2~. Building use was n~adeled based on 24-hour occupancy and energy output was compared. with actual utility usage obtained from. the owner to verify the accuracy of the ~nadel,