Compressed Air & Gas Institute
Producing nitrogen locally is an excellent way to reduce nitrogen costs and ensure a continuous supply of nitrogen gas at the appropriate purity. The ideal nitrogen generation solution varies by application, based on the specific levels of nitrogen purity, flow, pressure and dryness that are required. Environmental factors such as air quality, humidity and temperature also affect the performance of the system.
While oxygen is unquestionably the most important gas in our atmosphere, as it is essential for most animals and human life, nitrogen is the most widely used atmospheric gas. Nitrogen is the go-to gas for countless industrial, medical, and scientific applications. This is because nitrogen is in vast supply, inert, and possesses the desirable characteristics of being colorless, odorless, and tasteless. The purity of nitrogen significantly affects the outcome of the application for which it is used and how the industry measures the purity of nitrogen gas is the focus of this article.
One of the components frequently included in a reciprocating air compressor is an air receiver, often referred to as an air tank. Proper air storage is a critical component of intermittent duty cycle because for brief moments, the system can provide more compressed air than would otherwise be provided by the compressor pump. The capacity of compressed air piping also contributes to the total capacity of the air storage system.
Centrifugal air compressors are known for reliable longevity, but at some point, end- of- serviceable- life decisions must be made. Your centrifugal compressor has been the lifeblood of the factory for upwards of twenty-five years, or longer, but it is finally showing signs of giving up the ghost. Much like when the aging family automobile continues to rack up increasingly more expensive repair bills, operators of aging centrifugal compressors face the decision to repair or replace the machine when the maintenance costs reach a certain threshold.
Aftermarket genuine parts ensure that the compressed air system will continue to meet the requirements it was engineered to achieve. Replacement parts must fit the compressor correctly so that operation continues to function properly. Parts that are not fitted properly could affect the function of the unit downstream.
Centrifugal air compressors efficiently convert energy utilizing a series of stages to compress and cool the air as it continuously flows through the unit. A centrifugal compressor imparts kinetic energy into the airstream by increasing the velocity of the air using a rotating element and then converts this kinetic energy into potential energy in the form of pressure. In between each stage of compression, the air is cooled, and excess moisture is removed to further increase the efficiency and air quality.
Freezing temperatures can have negative effects on your reciprocating air compressor, dryer, and many accessories. One of the best practices to adopt is keeping a detailed maintenance log. At the end of each season, take note of the condition your equipment is in, and address it promptly using the manufacturer’s instructions to keep it operating smoothly and efficiently.
Modified Atmosphere Packaging (MAP) accounts for a significant amount of nitrogen usage in the food and beverage industry. MAP involves injecting nitrogen into beverage or food packaging to purge and displace any oxygen-containing air with nitrogen. Oxidation of lipids in food products causes rancidity. Since oxygen is replaced with dry, inert nitrogen in MAP packaging, no product oxidation will occur. The result is maximized product shelf life.
Reciprocating/piston air compressors have many moving parts and regular maintenance is an essential practice. This ensures all compressor components function at peak efficiency as well as for preventing wear that can ultimately lead to premature failure. The following tips can serve as a guide for safe, reliable, and economical reciprocating compressor operation and maintenance.
Reciprocating air compressors are designed for variable up and down duty cycle applications as the full power of the compressor is available when needed. When demand stops, a reciprocating compressor shuts off automatically to reduce consumption of power. In selected cases where the high demand for air is short term, a tank mounted system provides air flow bursts that exceed the capacity of the compressor by using stored up compressed air from the tank.
Advances in phone technology dramatically improve their function and our experience. More storage, faster speeds, enhanced communication options, bigger and brighter display….and so on. As a result, today’s phones are significantly more powerful – improving our productivity and changing our lives. As for the technology laggards, obsolescence eventually prompts change. Repairing or replacing parts and accessories on the old phones is an increasing challenge. Eventually they have to succumb to technology.
In an ever-evolving world of regulations, requirements, and legal ramifications, it can be all too easy to want to cover all the bases by adding a wide range of industry codes and standards to any project being put out for bid. Many assume that if the purchased equipment meets all the requirements of every developed code and standard then surely it will be a reliable and safe machine to operate with the best performance and energy efficiency. However, many of these codes and standards are developed with a tremendously broad range of machinery and equipment in mind and they may not always fit well with the specific project being developed. Compliance to these codes and standards may require very costly modifications to a manufacturer’s standard product for little to no real benefit.
Properly sizing a compressed air system can help determine if your facility has enough air to adequately supply your production equipment. Designing a cost effective system that minimizes any interruptions to productivity requires thoughtful planning and design. Typically, the desired outcomes of such a system focus on stable pressure and efficient operation, though it is important to note that each of these elements requires a unique solution.
This article will provide guidance in proper selection considerations and suggest when a centrifugal air compressor may be ideal for your needs.
The days are long gone when power to a motor was controlled with a knife switch. These were cumbersome and downright dangerous to man and equipment alike. Every electric motor has some form of controller, responsible for turning over (starting) the motor or motor-controlled equipment. These controllers offer differing features and complexity depending on the application, United States electrical codes require the use of a motor starter that meets NEMA’s National Electrical Code as well as all local electrical codes.
Compressed Air Best Practices® Magazine and the Compressed Air and Gas Institute have been cooperating on educating readers on the design, features, and benefits of centrifugal compressor systems. As part of this series, Compressed Air Best Practices® (CABP) Magazine recently caught up with the Compressed Air and Gas Institute (CAGI). During our discussion, we reviewed some of the things readers should consider when installing a centrifugal compressor system.
Centrifugal compressors are dynamic, and each has a characteristic curve of rising pressure as capacity decreases. Without any control system, the compressor would operate along this natural curve. A centrifugal compressor's flow and pressure are typically controlled by a combination of an inlet control device and an unloading valve (UV).
Compressed Air Best Practices® (CABP) Magazine recently caught up with the Compressed Air and Gas Institute (CAGI) to discuss variable inlet guide vanes (IGV). The following interview describes how centrifugal compressor efficiency can be improved thanks to recent developments in IGV technology.
A careful examination of a facility's compressed air system will likely reveal several opportunities to improve the performance of the compressed air system by effectively and efficiently removing moisture from the compressed air system. The Compressed Air and Gas Institute (CAGI) committed to issuing a series of articles discussing moisture in the compressed air system.
Because of such a wide breadth of product offering, we will cover each of these dryer types in some detail. It is always recommended that the compressed air treatment products be discussed in concert with the entire compressed air system and the application of the products. You should consult a compressed air expert to assure that the compressed air dryer selected is correct for your application.
The Compressed Air and Gas Institute (CAGI) will be issuing a series of articles discussing moisture in the compressed air system and will provide a brief overview of the compressed air drying technologies available.
Plant engineers do not purchase air compressors or compressed air dryers on a regular basis. There may be decades between purchases, and with today’s more reliable and durable compressed air equipment, the interval between purchasing decisions grows ever longer. This lack of purchasing frequency, coupled with the significant investment in productivity that compressors and dryers represent, means it is important to make the right decision.
