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38 <br />Water Source Heat Pum s SHP <br />We considered ceiling-mounted water source heat pumps. One heat pump would be <br />provided far each individual temperature control zone, and would provide the heating/cooling <br />equipment, as well as air distribution equipment within each unit. Heat addition or rejection <br />would be from a piped water supply; which in tum, would be heated or cooled by a hot water <br />boiler or fluid cooler (similar to a cooling tower). . <br />Advantages <br />• Energy efitcient <br />• 19 year median useful life <br />• Multiple units provide good zone temperature control <br />Relatively quiet in small sizes <br />• Remote access available for control and troubleshooting <br />• May be connected with other centralized digital controls <br />Disadvantages - <br />• Higher maintenance costs due to large number of refrigerant systems <br />• fixed outside air and low filtration efficiency will not permit adequate indoor air quality <br />control <br />• Minimal control over space humidity <br />The fallowing is an illustration of a typical system: <br /> Yftitrr Sores Mat Prr~ <br />~ wrrr aer+e~ Hwe run~a• ~ ~ aoo <br />Applla~pe~ F1r~1 P~rfq. t CoRq. M~I~.b. AU- 7ypiea~l Ok 1 <br />ww <br />eaw ~ ~ ` '~+. ~. M <br /> ~..° <br /> ~~ <br /> K I~A'i <br /> r. i a 1t <br /> ..y ~~~ <br /> <br /> <br />~ ~ ~ ~ <br />N <br />N <br />~~ 0 <br />0 <br />DC! g <br />Sp1o~ T~M~ gMP~x N <br />d <br />~a Sbpr + oD MI/R <br />(38) <br />