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RGC15/ Clip-On Reefer Generator The model RGC15 mounts to properly equipped ISO containers, in front of the refrigeration unit's upper face. Generator sets are typically provided with "pin” mounting to attach to the container’s header rail. Clamp mounting to the corner casting of the container is available as an option. In either case, when mounted, the RGC15 envelope allows acce1 more
RGU15/ Underslung Reefer generator The underslung RGU15 is designed for applications requiring under mounting of the container chassis between the I-beams to allow for maximum road clearnance and even weight distribution. Four-point quick disconnect mounting hardware allows it to be easily mounted and removed. more
4LT4000H9 MH/ Hydraulic 9m 4*1000W Metal halide lamp diesel-driven lighting tower GTL ‘ s hydraulic lighting towers, lamp post can be raised up to 9 m, resistance to wind force 9, equipped with brushless alternator, each lamp holder has independent control switch. Suitable for railway, electric, public security, oil fields, metallurgy, petrochemical enterprises and other large-scale construction operations, accident repair, resc1 more
4SLT400M7 4*100W LED Solar Light Tower 4SIT400M7 LED GTL Lighting Towers is arugged, mobile outdoor light systems that providhigh-intensity, bright white lighting on-demand, where and when you need4SLT400M7 LED lighting towers is durablle and reliable. lt can cover up to 2304 m2 of lightin.area, suitable for any terrain and environment. The height of the lighting tower can extend tc7met1 more
Cummins 20~115 KVA Silent & Open Gen-set Cummins is the world's largest independent diesel engine manufacturer, with the industry's largest power range of diesel and natural gas engine line. GTL cummins unit adopts DCEC/CCEC/XCEC and original engine as driving power, with high overall reliability, long continuous operation time and low fuel consumption. In particular, cummins' worldwide s1 more
185CFM 7Bar Diesel Screw Air Compressor A rotary-screw compressor is a type of gas compressor, such as an air compressor, that uses a rotary-type positive-displacement mechanism. They are commonly used to replace piston compressors where large volumes of high-pressure air are needed, either for large industrial applications such as chillers, or to operate high-power air tools such as jac1 more
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How does high altitude affect the performance of air compressors?
How does the air compressor system work?
Most mobile air compressor systems are powered by diesel engines. When you turn on this engine, the air compression system sucks in ambient air through the compressor inlet, and then compresses the air into a smaller volume. The compression process forces the air molecules closer together, increasing their pressure. This compressed air can be stored in storage tanks or directly power your tools and equipment.
As the altitude increases, the atmospheric pressure decreases. Atmospheric pressure is caused by the weight of all air molecules above you, which compress the air around you downward. At higher altitudes, there is less air above you and therefore lighter weight, which results in lower atmospheric pressure.
What effect does this have on the performance of the air compressor?
At higher altitudes, lower atmospheric pressure means that air molecules are less tightly packed and less dense. When an air compressor sucks in air as part of its intake process, it sucks in a fixed volume of air. If the air density is low, there are fewer air molecules sucked into the compressor. This makes the volume of compressed air smaller, and less air is delivered to the receiving tank and tools during each compression cycle.
Relationship between atmospheric pressure and altitude
Engine power reduction
Another factor to consider is the effect of altitude and air density on the operation of the engine driving the compressor.
As altitude increases, the air density decreases, which results in a roughly proportional decrease in the horsepower your engine is able to produce. For example, a normally aspirated diesel engine might have 5% less power available at 2500 m/30℃ and 18% at 4000 m/30℃, when compared to operation at 2000m/30℃.
Reduced engine power can result in a situation where the engine bogs down and the RPM drops which results in fewer compression cycles per minute and therefore less compressed air output. In extreme cases, the engine may not run the compressor at all and will stall.
Different engines have different de-rate curves depending on the design of the engine, and some turbocharged engines can compensate for the effect of altitude.
If you are working or plan to work at a higher altitude, it is recommended to consult your specific air compressor manufacturer to determine the impact of altitude on your air compressor.
De-rate curves example of the engine
How to overcome problems related to altitude
There are some ways to potentially overcome the challenges of using air compressors in high altitude areas. In some cases, a simple adjustment of the engine speed(RPM) to increase the speed of the compressor will be all that is needed. Some engine manufacturers may also have high-altitude components or programming to help offset power drops.
Using a higher output engine and compressor system with enough power and CFM to meet your needs, even if performance declines may be a viable option.
If you have challenges with air compressor performance in high altitude areas, please consult the GTL directly to see what they can provide.
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