| 公式: 單段壓縮
Ps K Pd K-1/K
HP/Qm3/min = ------------ * ------- * [(------) – 1]
0.45625 K – 1 Ps
Ps:進氣絕對壓力Qs:空氣量K:Cp/Cv 1.4 Pd:排氣壓力
例:一台14m3/min 壓縮機,排氣壓力7kg/cm2G,問馬力多少?
Ps / 0.45625 = 1.033 / 0.45625 = 2.264
K / K – 1 = 1.4 / (1.4 – 1) = 3.5
[(Pd/Ps)^K-1/K]-1 = 0.796
2.264 * 3.5 * 0.796 * 14 = 88.3 hp
公式: 雙段壓縮
Ps nK Pd K-1/nK
HP/Qm3/min = ------------ * ------- * [(------) – 1]
0.45625 K – 1 Ps
Ps / 0.45625 = 1.033 / 0.45625 = 2.264
2K / K – 1 = 2 * 1.4 / (1.4 – 1) = 7
[(Pd/Ps)^K-1/2K]-1 = 0.345
2.264 * 7 * 0.345 * 14 = 76.54hp
|
公式:
144 Ps Qs K Pd K-1/K
HP = ------------ * ------- * [(------) – 1]
33000 K – 1 Ps
Ps 進氣絕對壓力
Qs 空氣量
K Cp/Cv 1.4
Pd 排氣壓力
例:一台495cfm 壓縮機,排氣壓力100PSIG,問馬力多少?
144*Ps*Qs/33000 = 144 * 14.7 * 494 / 33000 = 31.68
K / K – 1 = 1.4 / (1.4 – 1) = 3.5
[(Pd/Ps)^K-1/K]-1 = 0.796
31.68 * 3.5 * 0.796 = 88.28hp |
公司名稱：九華企業行
