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Pipeline Pumping and Compression Systems: A Practical Approach

M. Mohitpour
M. Mohitpour
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K. K. Botros
K. K. Botros
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T. Van Hardeveld
T. Van Hardeveld
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ASME Press
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Pump and compressor drivers form a critical part of pumping and compression systems. Decisions made on which ones to use have far-reaching and long-lasting implications for the entire life of the pipeline system. As will be dealt with in more detail in this chapter, selection of drivers entails many aspects such as the following:

• power size and range

• performance characteristics (e.g., ambient conditions, altitude)

• compatibility with driven equipment

• fuel source available

• starting requirements such as torque

• reliability and availability

• other drivers already installed at same site or other sites

• maintenance support available

• auxiliary systems that need to be provided

• drivers available from driven equipment supplier

• physical dimensions and weight

• environmental requirements

When pumps or compressors are first installed on a pipeline system, there is often a plan for future expansion of which a major component is the desire to attain consistency in the type and even model of driver chosen. In spite of this desire for consistency, a pipeline system over time will end up with a variety of drivers and even the best laid and a less than optimum system results. For example, even the same gas turbine model changes with time and interchangeability between units may be lost. In contrast with the driven equipment, drivers are much more likely to see changes and even entire replacement. In general, drivers may become obsolete and require replacement due to one or more of the following reasons:

• loss of maintenance support from the manufacturer for that model or even the vendor going out of business

• improvements in fuel efficiency

• changes in power requirements (driver may be over or undersized)

• environmental factors such as NOx regulations

• major driver components reaching the end of their life with replacement being too expensive

• high-efficiency solutions such as waste heat recovery

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