制冷机房设计规范.doc

制冷机房设计规范.doc:..制冷机房设计规范Directory(1) ——- 设计题目:::::供水温度7°C・回水温度12°:自来水在高温度28°::::°°C夏季主导风向:西南夏季室外平均风速::P=.⑴制冷量的确定:Q二1・15X300二345KW⑵制冷机组的选择:•离心式冷水机组。Thepistontypechiller:advantages:easytouse,easytoprocess・Thesystemdeviceissimple,thelubricationiseasy,theexhaustdeviceisnotallowed,theperformanceofthehighspeedmulti-:plexmaintenance,highmaintenancecosts;Cylinderratioislow,themachineisrefrigeratedless,thespiralrefrigerationunit:theadvantages:simplestructure,lessmovingparts,lessvulnerableparts,longlife;Lownoise,pressionratioof20;Thecrewismoreeffectivethanothers・Disadvantages:highprice;・Thecentrifugalchiller:thehighspeedoftheimpeller,pactstructureandlownoise;Theunitcanbemoreeffectivethanhigh,:uracyformaterialstrength;Centrifugalnegativepressuresystem,,therefrigerationsystemselectstheworkingconditionofsc