量 ENERGY EFFICIENCY AUDIT
數 不 金 年 例 Year Equipment Maintenance Energy 1 760,000 75,000 1,935,000 2 75,000 1,935,000 3 75,000 1,935,000 4 75,000 1,935,000 5 75,000 1,935,000 6 75,000 1,935,000 7 75,000 1,935,000 8 75,000 1,935,000 9 75,000 1,935,000 10 75,000 1,935,000 Total 760,000 750,000 19,350,000
冷 率 7.5/10 11/15 滑螺 Kg/cm² 7 8 10 13 kw/(m³.min ¹) 7.5 8.4 9.5 7.9 8.9 10.1 8.7 9.9 11.2 9.9 11.2 12.7 15/20 18.5/25 6.9 7.9 8.9 7.4 8.4 9.4 8.3 9.4 10.7 9.5 10.7 12.1 冷 22/30 30/40 37/50 45/60 6.8 7.6 8.3 7.2 8.1 8.8 8.1 9.1 10.2 9.1 10.2 11.5 55/75 75/100 90/125 6.1 6.9 7.8 6.5 7.3 8.3 7.7 8.7 9.8 8.6 9.7 11.0 110/150 6.0 6.7 7.5 6.3 7.1 8.0 7.4 8.3 9.5 8.4 9.4 10.6 7.5/10 11/15 6.9 7.7 9.0 7.3 8.2 9.5 8.6 9.7 10.7 9.5 10.8 12.1 15/20 18.5/25 6.5 7.3 8.3 6.9 7.7 8.8 8.2 9.2 10.2 9.3 10.4 11.5 冷 22/30 30/40 37/50 45/60 6.2 7.0 7.9 6.6 7.4 8.4 7.8 8.8 9.8 8.7 9.8 10.9 55/75 75/100 90/125 5.8 6.5 7.5 6.1 6.9 8.0 7.5 8.4 9.3 8.4 9.4 10.4 110/150 5.6 6.3 7.1 6.0 6.7 7.5 7.2 8.1 9.0 8.1 9.1 10.0
120,00 performance curve L75RS vs. Fixed speed premium at 7 bar, 7500 ltr. tank, delta _p 0,5 bar P = ( ) [ kw ] m 3 /min kwh, total input power 100,00 80,00 60,00 40,00 20,00 4 0,00 0,00 2,00 4,00 6,00 8,00 10,00 12,00 14,00 16,00 m3/min, demand L 75RS 75 kw, fixed speed premium
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1600 cfm @ 100 psi = 400 hp 1400 cfm @ 125 psi = 400 hp 1200 cfm @ 150 psi = 400hp 755 l/s @ 7 bar = 300kW 660 l/s @ 8 bar = 300 kw 566 l/s @ 10 bar = 300 kw 7
Pressure cascade control with pressure switch Total pressure range Old Compressor 1 Compressor 2 Compressor 3 Compressor 4 Compressor 5 Typical cascade control of several interconnected compressors: The disadvantage of this arrangement is the summing up of the pressure ranges resulting in a common wide pressure range. Economically unfavorable Please note: a pressure increase of 1 bar = 6 to 10% higher input power!
Pressure range control with pressure sensor Modern Pressure savings Compressor 1-5 New pressure range Modern control variant of several interconnected compressors: Advantage: All connected compressors are controlled using a common host pressure sensor within a very narrow pressure range. Pressure switch systems are also equipped with sensor control. Very economic Please note: A pressure increase of 1 bar = 6 to 10% higher input power!
: : (for smaller piston compressors) :
No! A volume flow control depends on the properties of the compressor (model) drive engine (permissible number of starts per hour) compressed-air system control range required :
: Performance 100% 80% 70% 20% Idling 100% 50% 0% Quantity delivered Continuously variable control of the inlet valve enables adjustment of the supply quantity between 100% and 50% Power consumption is reduced to min. 80%
By means of Regulated Speed, there is good adjustment to varying consumption of compressed air No idling, therefore, no idling costs No peaks Increased investment costs (electrical system) Advice: Plants with several compressors require tuning between controlling range and available standard compressors
Make energy consumption the first consideration! WHY?
Understand the air demand It is important to understand the air demand so that the best solution can be identified
Data-logging Process Log compressor system and generate demand profile
車 The addition of a speed regulated compressor to a system enables offload running to be minimised or eliminated thus saving energy
kw 率 100% 80% 60% 40% 20% 20% 40% 60% 80% 100% 量 理
VS LRS- kw 100% 80% Modulation 60% LRS Speed Regulated Load/Unload 40% 20% THEORETICAL CURVE 20% 40% 60% 80% 100% LRS Regulated Speed curve better than THEORETICAL CURVE Air Demand
狀 率 年 量 2000 1500 1000 500 0 20% 40% 60% 80% 100% % 年 量
量 例 省 狀 100 / ( % ) 70 40 LRS- 列 綠
量 例 省 狀 7.6 7.5 / ( ) 7.4 (BAR) 7.3 7.2 7.1 7.0 6.9 LRS- ( ) 6.8 列 車 理 省 狀
數 100% 50% 0% 100% % 50% 0% 車 / 車 LRS 狀 數 冷
400% 300% 1. 2. ( ) 3. 4. LRS 5. % 200% 100% 0% 流 浪 LRS- Cyclon SR
ENERGY SAVING ENERGY CONSUMPTION COMPARISON EXAMPLE ENERGY SAVING @ 50% LOAD 100 LOAD/UNLOAD REGULATION ENERGY CONSUMPTION ( % ) 90 80 70 60 50 40 30 REGULATED SPEED COMPRESSOR 20 ONLOAD OFFLOAD ONLOAD OFFLOAD RS Keeps Energy Consumption In Direct Proportion to Air Demand
The Benefits of Regulated Speed Compressor Unloaded running eliminated Near constant system pressure Soft starting with no current peaks No peak current energy cost penalties Unlimited stopping and starting Reduced mechanical loads Drawing
Maximise Air System Efficiency As a stand alone, or part of a multi-compressor system, a CompAir regulated speed compressor will maintain maximum air system efficiency LRS LRS LRS Keep conventional compressors at full load to exploit their maximum efficiency
15kW 93% 91% 89.5% 37kW 94.5% 93% 91.2% 75kW 95.4% 94.5% 92.7% 90kW 95.4% 94.5% 93% 31
率 籠 IE3 率 2 4 6 η(%) η(%) (rpm) (rpm) (rpm) η(%) KW HP ( ) 60Hz 60Hz 60Hz 0.75 1 77.0 77.0 85.5 85.5 82.5 82.5 1.1 1.5 84.0 84.0 86.5 86.5 87.5 86.5 1.5 2 85.5 85.5 86.5 86.5 88.5 87.5 2.2 3 86.5 85.5 89.5 89.5 89.5 88.5 3.7 5 88.5 86.5 89.5 89.5 89.5 89.5 5.5 7.5 89.5 88.5 91.7 91.0 91.0 90.2 7.5 10 90.2 89.5 91.7 91.7 91.0 91.7 11 15 91.0 90.2 92.4 93.0 91.7 91.7 15 20 91.0 91.0 93.0 93.0 91.7 92.4 18.5 25 91.7 91.7 93.6 93.6 93.0 93.0 3600 1800 1200 22 30 91.7 91.7 93.6 94.1 93.0 93.6 30 40 92.4 92.4 94.1 94.1 94.1 94.1 37 50 93.0 93.0 94.5 94.5 94.1 94.1 45 60 93.6 93.6 95.0 95.0 94.5 94.5 55 75 93.6 93.6 95.4 95.0 94.5 94.5 75 100 94.1 93.6 95.4 95.4 95.0 95.0 90 125 95.0 94.1 95.4 95.4 95.0 95.0 110 150 95.0 94.1 95.8 95.8 95.8 95.4 150 200 95.4 95.0 96.2 95.8 95.8 95.4 185~200 250~270 95.8 95.4 96.2 96.0 95.8 95.8 : (1), CNS14400. (2). (3)η ε=(1 η )x15% ( (4) (%),. (5) (6) Copyright 2013 ITRI 32 32
200hp 26.4CMM Modulation 6.7/7.7/7.2 208A/230A 4447/21610h AP01 Timer drain 28CMM 200hp 26.4CMM 213A Modulation 6.6/7.5/7 53807/54547h 200hp 26.4CMM Modulation 6.6/7.5/7 51359/54145h 200hp 26.4CMM 216A Modulation 7/8/7.5 30222/30529h AP02 AP03 AP04 3 3 4 3 3 4 3 3 4 2 28CMM 30CMM 4 6 4 6 40CMM 220hp 24.4 CMM/8.6bar load/unload 6.8 30397/88197h 34% loading 220hp 24.4CMM/10.8bar Load/unload 6/7 42119/45851h 91% loading OFF AP05 AP06 7.4bar 7.4 7 kg/cm2 5? Total 130CMM 3 4 4 3 40CMM 166CMM 90~120CMM
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Air compressor power consumption: 35
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Flow status: 37
#2 200hp 38
#1 drain air lose 26.4CMM at 8 bar
#2/3 air compressor running at load Modulation
#6 air compressor 10.8 bar model Tank drain air lose
( mm) 2 ( bar ) 4 6 8 10 0.5 1.0 1.5 2.0 3.0 4.0 5.0 6.0 8.0 10.0 8 30 55 100 225 330 510 720 1000 1570 12 45 90 170 375 550 850 1220 2150 3400 15 65 125 240 520 780 1200 1700 3000 4700 20 85 160 310 675 1250 1870 2750 4800 7500 25 105 200 380 825 1500 2300 3350 5850 9200
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( ) : : : 1 MPa= 10 Bar
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