Peformance Comparison For Large Dsp(For Distribution)
0 likes597 views
The document compares the performance characteristics of 160kW class screw compressors from Hitachi and Competitor A. Hitachi compressors have higher discharge pressure and capacity, lower shaft input power, and higher specific power compared to Competitor A compressors. At unloading conditions, Hitachi compressors also have lower power consumption.
Peformance Comparison For Large Dsp(For Distribution)
- 1. HITACHI OIL FREE SCREW NEXTseries WATER COOLED TWO STAGE DSP 132～160kW ～ DSP 200～240kW ～ Comparison Material
- 2. Performance Manufacturer - HITACHI DSP Competitor A Output Wk 132 145 160 200 132 145 160 200 Catalogue value Discharge Pressure aP M 0.75 0.75 0.75 0.75 0.69 0.69 0.69 0.69 .tnereff d s erusser P deta R i i Capacity n m/3 m i 23.4 26.0 28.5 37.0 23.8 26.3 28.3 36.3 ecna mrofrep egakcap lato T： H dna sso erusserp gn du cn to N： A l i l i ed s no tcus ta es r erutarep met i i i Shaft input Wk 138.6 152.3 168.0 220.0 129.8 142.3 156.3 199.9 ed s egrahcs d ta sso erusserp gn du cn to N i i l i l i i C lI ）α- yt capa （℃03 te n ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ Comparison at sam condition e Discharge Pressure 0.69 0.69 0.69 0.69 0.69 0.69 0.69 0.69 Capacity n m/3 m i 23.4 26.0 28.5 37.0 23.0(-α ) 25.4(-α ) 27.3(-α ) 35.0(-α ) ）no tp muss（ ℃5=s TΔ a Pk2=s PΔ A i a , ： Shaft input (Main motor) Wk 132.4 145.4 160.4 210.1 131.7 144.4 158.6 202.9 ）no tp muss（ a P M20 0=d PΔ A i a . ： Shaft input (Auxiliary motor) Wk 0.4 0.4 0.4 0.4 1.5 1.5 1.5 1.5 Total shaft input Wk 132.8 145.8 160.8 210.5 133.2 145.9 160.1 204.4 Specific power ) n m / 3 m / Wk i ( 5.674 5.608 5.644 5.689 5.805 5.753 5.867 5.838 100% 100% 100% 100% 102.3% 102.6% 104.0% 102.6% egatnavda ％0 4～3 2 ： hcat H . . i i Power consumption at unloading Shaft input (Main motor) Wk 26.3 28.9 31.9 41.8 36.3 39.8 43.8 56.0 Total shaft input Wk 26.7 29.3 32.3 42.2 37.8 41.3 45.3 57.5 re wop l a ms: hcat H l i i 100% 100% 100% 100% 141.6% 141.0% 140.0% 136.2% 2
- 3. Performance Manufacturer - HITACHI DSP Competitor A Output Wk 132 145 160 200 132 145 160 200 Catalogue value Discharge Pressure aP M 0.75 0.75 0.75 0.75 0.69 0.69 0.69 0.69 .tnereff d s erusser P deta R i i Capacity n m/3 m i 23.4 26.0 28.5 37.0 23.8 26.3 28.3 36.3 ecna mrofrep egakcap lato T： H dna sso erusserp gn du cn to N： A l i l i ed s no tcus ta es r erutarep met i i i Shaft input Wk 138.6 152.3 168.0 220.0 129.8 142.3 156.3 199.9 ed s egrahcs d ta sso erusserp gn du cn to N i i l i l i i C lI ）α- yt capa （℃03 te n ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ Comparison at sam condition e Discharge Pressure 0.69 Characteristic0.69Perform 0.69 0.69 of ance 160kW class) 0.69 （0.69 0.69 0.69 Capacity n m/3 m i 081 23.4 26.0 28.5 37.0 23.0(-α ) 25.4(-α ) 27.3(-α ) 35.0(-α ) ）no tp muss（ ℃5=s TΔ a Pk2=s PΔ A i a , ： Shaft input (Main motor) Wk 132.4 061 145.4 160.4 210.1 131.7 144.4 158.6 202.9 ）no tp muss（ a P M20 0=d PΔ A i a . ： Shaft input (Auxiliary motor) Wk 0.4 W 0.4 0.4 0.4 1.5 1.5 1.5 1.5 Total shaft input Wk 0 4 1k 132.8 145.8 160.8 210.5 133.2 145.9 160.1 204.4 （ Specific power ) n m / 3 m / Wk i ( 5.674 0 2 1t u Competitor A5.805 5.608 5.644 5.689 5.753 5.867 5.838 p 100% n 100% 100% 100% 102.3% 102.6% 104.0% 102.6% egatnavda ％0 4～3 2 ： hcat H . . i i 0 0 1i t f Power consumption at unloading 08 a h s HITACHI DSP Shaft input (Main motor) Wk 26.3 28.9 31.9 41.8 36.3 39.8 43.8 56.0 06 l a Total shaft input Wk 26.7 t o 29.3 32.3 42.2 37.8 41.3 45.3 57.5 re wop l a ms: hcat H l i i 04 T 100% 100% 100% 100% 141.6% 141.0% 140.0% 136.2% 02 0 0 5 02 51 01 52 03 )n m/3 m( yt capa C i i 3
- 4. Dimensions HITACHI DSP 160kW Competitor A 160kW Starter is installed in the package. Starter is installed in the package. External starter is required. 1925 1850 2500 2700 1600 1565 HITACHI DSP Model Dimensions(m ) m 2 Footprint (m ) Volum 3 e(m ) Weight(kg) (kW) W D H A= 100% A=100% A= 100% 132 2500 1600 1925 4.00 106.5% 7.70 110.8% 3800 107.2% 145 94.7% 98.5% 86.4% 160 94.7% 98.5% 86.4% 200 2800 1800 1950 5.04 119.3% 9.83 109.0% 4800 92.1% 240 107.3% 98.1% 81.8% Competitor A Model Dimensions(m ) m Footprint(m ) 2 Volum 3 e(m ) Weight(kg) (kW) W D H 132 2400 1565 1850 3.76 6.95 3545 145 2700 1565 1850 4.23 7.82 4400 160 4440 200 2700 1565 2133 4.23 9.01 5210 250 3000 1565 2133 4.70 10.01 5870 4
- 5. Screw rotor HITACHI DSP Competitor A ●Coating：Teflon free ： ● Coating：Containing Teflon ： ●Material of rotors：Stainless steel ： ● Material of rotors：Carbon steel ： 5
- 6. Structure of Intercooler and Aftercooler HITACHI DSP Competitor A Casing for cooler ●Air in copper tubes ●Air in copper tubes ●Air in aacast iron cooler casing ●Air in cast iron cooler casing ● HITACHI : No rust is occurred in copper tubes. ● Competitor A: Aftercooler might be clogged by the rust which is occurred by drain back flow in the cast iron cooler casing. 6
- 7. Oil fume remove system (1/2) HITACHI DSP Competitor A 【Standard】 】 【Standard】 】 OMR Breather Ejector Gear casing ● HITACHI: 99.99% oil fume is removed by OMR. ● Competitor A: If the filter is clogged,internal pressure of gear casing is increased and oil might enter the air end. 7
- 8. Oil fume recovery system (2/2) HITACHI DSP Competitor A 【Standard】 【Option】Electric dust collector 1.99.99％ oil fume can be removed 1.NOT original technology 2.Patented original design and structure 2.Only 99% oil fume can be removed. 3.No need to top up the oil (but must change following manual) 3.Less performance with oil spot on the 4.The reliability of Shaft seal is increased because of the electrode negative pressure in the gear case. 4.Pay attention for high voltage 5.No effect for shaft seal Ejector：Maintain the negative pressure in Remover Element the gear casing High voltage electrode Float Trap (send the collected oil) 8
- 9. Shaft Seal (1/3) HITACHI･･･ ･･･Visco type seal＋Air seals ･･･ ＋ Competitor A･･･ ･･･Visco type seal＋Stainless seal ･･･ ＋ The precisely grounded low friction high durability carbon + stainless steel holder ring air seals are used to prevent the compressed air from leaking out of the compression chamber. The brass, internal square grooved visco-type seals are used to prevent the oil that lubricates the gears and bearings from entering the compression chamber. The visco-type seals generate a positive pressure to push the oil fumes back to the gear case. Rotor side Bearing side Air seals Vent hole Visco-type seal 9
- 10. Shaft Seal (2/3) HITACHI DSP Competitor A Air out Vent hole Air in Vent hole 2 small vent holes Large diameter vent hole The number of the vent hole is NOT a point of shaft seal function ! 10
- 11. Shaft Seal (3/3) HITACHI DSP Competitor A Air end Air End Oil piping for shaft seals Oil pan for Vent hole shaft seals No oil pan is required on HITACHI Oil pan is required because of oil leak DSP because of high durability of from shaft seals. shaft seals. 11
- 12. ＥＮＤ ＥＮＤ 12