space age

Kaeser has in­tro­duced the space-sav­ing FSD ro­tary screw com­pres­sors

Farms & Farm Machinery - - News -

Kaeser Com­pres­sors has launched its lat­est-gen­er­a­tion space-sav­ing FSD series ro­tary screw com­pres­sors.

Based on the premise that air-cool­ing of ro­tary screw com­pres­sors can be sig­nif­i­cantly more cost ef­fec­tive than wa­ter­cool­ing, Kaeser uses a ra­dial fan to draw in am­bi­ent air di­rectly through the cooler with­out be­ing pre-warmed.

The com­pany says the 250kW-plus FSD com­pres­sors can there­fore be used in am­bi­ent tem­per­a­tures as high as 45C

A ther­mo­stat-con­trolled ra­dial fan for fluid cool­ing helps achieve fur­ther en­ergy sav­ings.

It is in­te­grated into Kaeser’s new Elec­tronic Thermo Man­age­ment (ETM) sys­tem, which “reg­u­lates oil tem­per­a­ture to en­sure a safe and con­sis­tent dif­fer­en­tial from the dew point tem­per­a­ture, thereby avoid­ing un­nec­es­sar­ily high com­pressed air dis­charge tem­per­a­tures and lead­ing to ad­di­tional en­ergy sav­ings”, Kaeser says.

With the heat re­cov­ery op­tion, a sec­ond ETM sys­tem al­lows for even more ef­fi­cient us­age of the avail­able heat en­ergy.

“This op­ti­mised ef­fi­ciency re­sults from the newly re­fined screw com­pres­sor blocks equipped with high ef­fi­ciency and flow op­ti­mised Sigma Pro­file ro­tors,” the com­pany says.

“De­vel­oped by Kaeser and con­tin­u­ously en­hanced ever since, the Kaeser Sigma Pro­file achieves power sav­ings of up to 15 per­cent com­pared with con­ven­tional screw com­pres­sor block ro­tor pro­files.

“Fur­ther­more, the screw com­pres­sor block is di­rectly driven by an en­ergy-sav­ing IE4 su­per pre­mium ef­fi­ciency mo­tor that op­er­ates at a low speed of 1490 rpm.

Di­rect drive not only elim­i­nates the trans­mis­sion losses as­so­ci­ated with gear drive, but also re­duces en­ergy con­sump­tion, main­te­nance re­quire­ment and sounds lev­els.”

The FSD.3 series ro­tary screw com­pres­sors are also avail­able in wa­ter- cooled ver­sions.

Each ver­sion is avail­able with 250kW or 315kW drive power, work­ing pres­sures of 7 to 15 bar and free air de­liv­er­ies from

29.2 to 58 m3/min. They are avail­able as a stan­dard fixed speed ma­chine or with Sigma Fre­quency Con­trol.

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