Contents
What is the power consumption of a compressor?
A good quality, fully loaded, air-cooled, lubricated rotary-screw compressor consumes about 16.5 kW of power to produce 100 cfm of compressed air at 100 psi. Refrigerated air drying of this air costs another 0.5 kW/100 cfm. Once the compressed air gets to the final end user, it is converted back to mechanical energy.
How do you calculate the power consumption of a compressor?
At the 600 cfm level the kWh for the fully loaded base compressor is calculated as follows: For the trim: Specific power at 45% load would be 33.6 kW/100 cfm (from Figure 3 the unit consumes 72% of full load power at 45% which is 1.6 times the full load sp).
What is specific power of air compressor?
Specific power: the ratio of power to compressed air flow rate at a given pressure typically given the units of kW/100 acfm. The lower the specific power the more efficient the compressor is at a given compressed air loads.
Which compressor is more efficient?
Multi-stage reciprocating compressors are more efficient, run cooler and have longer life than single- stage compressors, all because the intercooler(s) remove the heat of compression. While not typical for plant air, some special-application, two-stage compressors can deliver 250 psig or more.
How can I reduce the power consumption of my compressor?
Here are 10 steps you can take to optimize your compressed air system and save energy costs.
- Turn It Off.
- Fix Existing Leaks.
- Prevent New Leaks.
- Reduce Pressure.
- Check Drains.
- Review Piping Infrastructure.
- Change Filters Systematically.
- Recover Heat.
How efficient is a compressor?
Compressor Size A rotary screw compressor is most efficient when running in a 100 percent loaded condition. As a general rule of thumb, a compressor that is only running at 50 percent capacity will consume 20 percent or more power than a compressor that is running at or close to full capacity.
What affects compressor efficiency?
What influences air compressor energy efficiency? Such factors include type, model, size, motor power rating, system design, control mechanisms, uses and maintenance schedule.
How much power do you need for a compressor?
If this information is not available, we can approximate a typical compressor’s performance using that table at about 3-4 CFM per HP. Now that you have a ballpark power requirement for compressor operation, you need to add in the other loads to arrive at a total load demand on the engine.
What is the power of a screw compressor?
The data showed total package kW consumption numbers of 91, 89 and 90 kW for typical 125 psi rated air cooled screw compressors from large US manufacturers. One horsepower is equivalent to 0.746 kW. A power level of 91 kW is equivalent to 122 HP.
How are compressors used to reduce power consumption?
Firstly, half of the required air (1) is compressed in four stages (2), employing inter-cooling at 28°C in order to reduce the compressors’ power consumption. The rest of the air (3) is extracted from the gas turbine (GT) compressor and mixed before air pre-cooling and purification.
What’s the power factor of an industrial air compressor?
Line voltage to most industrial three phase air compressors is typically 240 V or 480 V and can be read from the compressor motor nameplate. In our experience, the power factor of 50-hp to 150-hp compressors during typical operation is about 85%1.