Sizing Drive Motors for Industrial Compressors, Blowers and Fans
Brad Addison, DuPont, Sept. 2011
For rotating machinery drive motors, robust company standards or commonly adopted industry standards, like IEEE 841 and API 541 / 547, should be used to get a high quality, durable motor. Even with good standards, and sometimes when taking a vendor-standard motor offering, it's possible for vendors to provide undersized or barely adequate motors for a given duty.
So, this article is intended to inform users and project personnel about buying a properly sized motor, as well as the advantages of buying a slightly oversized motor for driving a process or air compressor, blower or fan. It is not intended to address issues associated with driving other types of equipment, particularly where shock loads are involved.
Last Updated on Tuesday, 22 November 2011 20:32
IMBU iPad based Asset Monitoring
During the past 14 years in Operation & Maintenance of rotating equipment, we have regularly wondered why no convenient, intuitive way of staying informed of the performance of assets exists. With the launch of IMBU at KIOGE 2011 in Almaty (Kazakhstan), we have changed this!
IMBU, built on Apple’s iPad, is a unique asset performance monitoring system. It is simple, visually attractive & convenient to use. It is powerful in features & data offered to users.
IMBU has 3 unique selling-points: iPad + aggregation + internationalization.
Last Updated on Friday, 18 March 2011 12:11
Getting the most from your machines and foundations
Aronui Tecnologias SL
Alphatec Engineering (Europe) Ltd
Process plants around the world depend on millions of rotating machines:
and so on through a long list. The maintenance department is generally pretty busy keeping these machines together; repairing them, and making sure they are available for production.
Last Updated on Saturday, 12 June 2010 11:07
Guide to Reciprocating Compressor Lubrication (Crankcase and Cylinders)
Crankcase oils recommended are ISO viscosity grade 68, 100, 150, or 220 depending upon ambient temperatures. Generally, these lubricants will be paraffin base recirculating oils with rust and oxidation inhibitors and some may have anti-wear characteristics. If mineral base hydrocarbon oils are used where discharge temperatures are below 149°C (300°F), napthenic base oils are frequently recommended because these lubricants have low floc points and will not form wax crystals at low temperatures.
When a large vertical motor was due for inspection it was sent by the client to a specialist motor overhaul contractor for cleaning, inspection and re-certifying.
Standard procedure by the contractor was to remove the rotor, clean and inspect and then rebuild with new bearings and seals.
After overhaul the motor was dispatched directly back to site.
Last Updated on Monday, 24 May 2010 21:47
In industry, there are many different types of equipment used for the storage of liquids and gases. The many and varied types of storage systems are too many for all to be covered in this lesson. However, sufficient examples have been included in order to convey the principles of storing liquids and gases and the major problems involved.
Last Updated on Friday, 14 May 2010 09:45
Dresser Waukesha Introduces 16V275GL+ Gas Compression Engine with Low NOx Capability and Class-Leading Power Output
New engine meets 2010 US EPA emission requirements without catalyst
During the flow of fluids through process pipelines and equipment, solid particles of dirt, rust, scale.. etc, may be picked up by the fluids. These solids can cause damage to equipment by erosion and blockage. In order to minimize this problem, Filters or Strainers are installed in piping, upstream of equipment in which solid particles are undesirable.
In process operations, fluids and their movement and transfer from place to place, plays a large part in the process. Fluids are contained in various types of vessels and are transported in pipelines. In order to Start or Stop fluid flow, to Control flow and to Prevent Back-flow, various types of valves are installed in the piping. To prevent over-pressure in piping and vessels, we use Safety Relief valves and, to isolate equipment for maintenance etc, Block valves are installed.
Last Updated on Thursday, 29 April 2010 19:56
In industry, piping is used extensively for the safe transportation and transfer of fluids from place to place. This transfer and movement of fluids is a controlled procedure requiring piping, valves, fittings and methods of protecting the equipment from corrosion, erosion, expansion, contraction and physical movement beyond allowable limits.
The transmission of fluids can be divided into two broad groups:
Last Updated on Monday, 19 April 2010 17:58
The GasTechno® process is the world’s first single step process for converting natural gas into transportable liquid fuels and petrochemicals. With a wide range of applications and end products, the GasTechno® process is one of the best alternatives to wasting natural gas. In many cases, it is the only alternative!
Last Updated on Sunday, 11 April 2010 06:56
CompressionJobs.com is featured in the April Issue of Diesel & Gas Turbine Worldwide, page 44.
DIESEL & GAS TURBINE WORLDWIDE is the only international magazine that is dedicated to the products, technologies and industry news of large bore reciprocating engines and gas turbines across all industrial markets including stationary power generation, marine propulsion and mechanical drive installations. If it's in the engine room, it's covered.
Last Updated on Sunday, 11 April 2010 04:46
Compressor Systems, Inc. (CSI)
Simms Mesa, NM
Field gas compression
Frick screw compressor #355
Ignition Systems and Controls, Farmington, NM
Jim Del Vecchio
ACI Control Panel
This site has large swings of BTU fuel gas which caused severe detonation, damaging
Burlington, MA 01803, USA
Penza, 440034, Russia
Contact author: Leonid Moroz,
Special numerical research is carried out to study the effects of different centrifugal compressor design and rerating strategies needed for flow path components standardization during manufacturing and retrofitting processes in turbochargers.
Experimental data vs calculation results comparisons for several centrifugal compressor designs are used to confirm the validity of calculations in predicting performance and operating range.
Last Updated on Saturday, 27 March 2010 15:27
In process operations, liquids and their movement and transfer from place to place, plays a large part in the process. Liquid can only flow under its own power from one elevation to a lower elevation or, from a high pressure system to a lower pressure system.
The flow of liquid is also affected by friction, pipe size, liquid viscosity and the bends and fittings in the piping.
To overcome flow problems, and to move liquids from place to place, against a higher pressure or to a higher elevation, energy must be added to the liquid. To add the required energy to liquids, we use ' PUMPS '. A pump therefore is defined as ' A machine used to add energy to a liquid '.
Bearings are very important parts of rotating machinery. They are installed around the shaft of the rotating element and serve a number of purposes :
In conjunction with oil, bearings help to minimise friction.
They support the weight of the rotor.
Bearings minimise and control shaft movement which takes place in all directions as follows:
RADIAL MOVEMENT This is movement of the shaft in all vertical, horizontal and other directions ACROSS the cross-section of the shaft.
AXIAL MOVEMENT In all rotating machinery, there is a tendency for a shaft and rotor to move horizontally -ALONG THE LENGTH of the shaft. This is due to a force called ' THRUST ' and is caused by pressure difference across the rotor of the driver -( Turbine ..etc ) or the machine being driven - ( Pump, Compressor ..etc.).
Last Updated on Saturday, 27 March 2010 13:52
In industry, mechanical equipment such as pumps, compressors, turbines, motors and any other type of machine having moving parts, need 'LUBRICATION' - to minimise friction and wear, to carry away heat from moving parts, to clean and to prevent rust .
Refer to Figures: 16 & 17 as you read on.
Wet, natural gas direct from the wellstreams, at about 1600 Psi, is first pre-cooled and separated from liquids in an 'Intermediate Separator' and cooled in a gas/gas exchanger causing more liquids to separate out in the 'Choke KO Drum'. The liquids pass to other processes.
DISTILLATION COLUMNS (or TOWERS)
Distillation columns or towers are constructed to behave in the same way as a series of separate stills as discussed earlier. Each 'still' section consists of a number of 'TRAYS' or contacting devices arranged vertically above one another in the column. These trays or contactors bring liquid and vapour into intimate contact in order to obtain the required separation of the mixture. The height of the tower and the number of trays or contacting devices it contains, depends upon the purity of the 'Fractions' required.
Last Updated on Tuesday, 16 March 2010 12:54
'Evaporation' is the process of changing liquid to vapour. This process can be used to separate a mixture of liquids which have different boiling point temperatures. It is known that a liquid produces vapour at any temperature.